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Early leaf senescence under drought conditions in the Northern hemisphere Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-20 Chunyue Ma, Xiaoyue Wang, Chaoyang Wu
Changes in the dates of autumn foliar senescence (DFS) have significant impacts on regional carbon uptake, while current approaches for the estimation of DFS are still lacking. The most important issue is that there are complicated factors that affect the DFS, among which drought effects probably have contributed the most. Using long-term DFS observations derived from the third-generation normalized
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Hydrometeorology-wildfire relationship analysis based on a wildfire bivariate probabilistic framework in different ecoregions of the continental United States Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-20 Ke Shi, Yoshiya Touge, So Kazama
Wildfires are a natural part of the ecosystem in the U.S.. It is vital to classify wildfires using a comprehensive approach that simultaneously considers wildfire activity (the number of wildfires) and burned area. On this basis, the influence of hydrometeorological variables on wildfires can be further analyzed. Therefore, this study first classified wildfire types using a wildfire bivariate probability
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Energy balance closure at FLUXNET sites revisited Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-18 Matthias Mauder, Martin Jung, Paul Stoy, Jacob Nelson, Luise Wanner
The FLUXNET network with numerous eddy covariance stations distributed worldwide is an important backbone for the study of ecosystem-atmosphere interactions. In order to provide reliable data for a variety of related research fields all parts of the ecosystem-atmosphere interactions need to be fully captured. Energy balance closure can be an indicator that all fluxes are fully recorded. However, in
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Performance of nine maize phenology models in China under historical climate change conditions Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-18 Xiaofeng Kang, Dingrong Wu, Jiaojiao Tan, Peijuan Wang, Yuping Ma, Jianying Yang, Chunyi Wang, Zhiguo Huo, Qi Tian, Qiang Yu
Accurate and unbiased simulation of crop phenology under various climate conditions is a necessary feature of phenology models. Nine models were evaluated for simulating the vegetative growth period (VGP) and the reproductive growth period (RGP) of maize (Zea mays L.) under historical climate variation. Seven models were based on a constant thermal/photothermal assumption (MAIS, SIMCOY, EPIC, MCWLA
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Minor carbon sequestration under nitrogen deposition due to downregulated nitrogen uptake and use efficiency Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-17 Song Wang, Ruiyang Zhang, Yuanyuan Huang, Yiqi Luo, Weinan Chen, Yahai Zhang, Jinsong Wang, Shuli Niu
Global nitrogen (N) deposition substantially enhances ecosystem carbon cycling but usually results in minor carbon sequestration. The mechanisms underlying the minor stimulation of N deposition on carbon sequestration are not fully understood. Here, we used 22 sets of observations from a gradient N addition experiment with rates at 0, 2, 4, 8, 16, to 32 g N·m-2·year-1 in an alpine meadow ecosystem
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Soil moisture and precipitation dominate the response and recovery times of ecosystems from different types of flash drought in the Yangtze River Basin Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-16 Chen Hu, Dunxian She, Gangsheng Wang, Liping Zhang, Zhaoxia Jing, Si Hong, Zhihong Song, Jun Xia
Flash droughts and their ecological impacts on terrestrial ecosystems have recently garnered increased attention due to their rapid intensification. However, research on the response and recovery of ecosystems to flash droughts, particularly regarding different types of flash droughts and their determinants, remains relatively limited. Here we classified flash droughts into meteorological, evaporative
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Forecasting dead fuel moisture content below forest canopies – A seven-day forecasting system Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-16 Christopher Sean Lyell, Usha Nattala, Thomas Keeble, Elena M. Vella, Rakesh Chandra Joshi, Zaher Joukhadar, Jonathan Garber, Simon J Mutch, Tim Gazzard, Tom Duff, Gary Sheridan
Accurate forecasting of forest fuel moisture is critical for decision making for bushfire risk and prescribed burning. In-situ dead fuel moisture content (DFMC) monitoring (fuelsticks) has improved significantly, along with improvements in weather forecasting and spatial representation of forest density. Machine learning (ML) models have also out-performed traditional fuel moisture estimation approaches
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Hazard assessment of rice cold damage based on energy balance in paddy field Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-14 Xueke Yan, Ying Guo, Bing Ma, Yunmeng Zhao, Suri Guga, Jiquan Zhang, Xingpeng Liu, Zhijun Tong, Chunli Zhao
Cold stress seriously affects rice yield in Northeast China and, as a result of climate change, there are new trends in the characterization of cold damage. Accurate simulation of water temperature in paddy fields and assessment of cold damage hazard can contribute to improving the accuracy of agrometeorological disaster risk assessment in the context of climate change. Hence, in this study, first
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Future changes in agrometeorological extremes in the southern Mediterranean region: When and where will they affect croplands and wheatlands? Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-14 Behnam Mirgol, Bastien Dieppois, Jessica Northey, Jonathan Eden, Lionel Jarlan, Saïd Khabba, Michel Le Page, Gil Mahe
Climate change and extremes are increasingly threatening food security, especially in the Global South. Here, we examine how croplands and wheatlands of the southern Mediterranean region could be affected by projected changes in agrometeorological extremes over the 21st century. We use 17 bias-corrected climate models from the sixth phase of the Coupled Model Intercomparison Project (CMIP6) to identify
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Proxy detection of wheat water stress from photochemical reflectance index and land surface temperature data Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-13 Zoubair Rafi, Valérie Le Dantec, Saïd Khabba, Abdelhakim Amazirh, Patrick Mordelet, El Houssaine Bouras, Salah Er-Raki, Abdelghani Chehbouni, Olivier Merlin
In semi-arid and arid regions, crops face elevated atmospheric demands and endure prolonged periods of moderate to severe water scarcity. In this context, this study investigated the effectiveness of the photochemical reflectance index (PRI) and a normalized surface temperature index (T) for proxy detection of the water stress of winter wheat crops. Furthermore, the potential of PRI for characterizing
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Coupled models of water and carbon cycles from leaf to global: A retrospective and a prospective Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-13 Ying-Ping Wang, Lu Zhang, Xu Liang, Wenping Yuan
Our understanding of water and carbon cycles and their coupling has advanced significantly over the last six decades. In this review, we will examine the progress made since the 1960s and explore how key developments in the studies of water and carbon cycles on land have influenced the way we model these two cycles from leaf to global scales. We will particularly focus on the Penman-Monteith equation
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MONTPEL: A multi-component Penman-Monteith energy balance model Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-12 Rami Albasha, Loïc Manceau, Heidi Webber, Michaël Chelle, Bruce Kimball, Pierre Martre
Mechanistic modelling is gradually replacing empiricism in crop models, focusing on leaf-level physiological processes. This shift necessitates simulating crop surface temperature at infra-canopy sub-daily scales but many crop models still rely on empirical formulations for canopy temperature estimation, typically on a daily basis. We developed MONTPEL, a multi-component Penman-Monteith model that
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Tree rings of Terminalia catappa Linn. and climate variability in a tropical South American estuary Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-12 Renata Cristina Bovi, Daigard Ricardo Ortega_Rodriguez, Bruna Hornink, Gabriela Morais Olmedo, Gabriel Assis-Pereira, Mario Tomazello-Filho, Miguel Cooper, Angelo Fraga Bernardino, Tiago Osório Ferreira
Given the prevailing uncertainties surrounding regional climate variability in southeastern Brazil, it is necessary to explore proxy records. The present dendrochronological study investigates the climate variations in the Neotropical estuarine system of the Rio Doce basin based on tree-rings records of 40 trees of Linn. The study demonstrates that annual growth rings of the species record the variations
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Questioning voxel grids: Semi-continuous sampling of leaf area density using airborne waveform lidar in boreal and hemiboreal conifer and broadleaved forests Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-11 Daniel Schraik, Aarne Hovi, Miina Rautiainen
Plant area density measurements provide spatially explicit information about the density and distribution of canopy elements. This information is needed for modeling of the forest radiation regime, climate and for other ecological applications. Terrestrial laser scanning (TLS) provides detailed information about canopy structure, but it cannot be used for monitoring large areas. Airborne laser scanning
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Fuel constraints, not fire weather conditions, limit fire behavior in reburned boreal forests Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-11 Katherine Hayes, Chad M. Hoffman, Rodman Linn, Justin Ziegler, Brian Buma
Fire frequency in boreal forests has increased via longer burning seasons, drier conditions, and higher temperatures. However, fires have historically self-regulated via fuel limitations, mediating the effects of changes in climate and fire weather. Early post-fire boreal forests (10–15 years postfire) are often dominated by mixed conifer-broadleaf or broadleaf regeneration, considered less flammable
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Climatic controls of fire activity in the red pine forests of eastern North America Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-10 Daniela Robles, Yves Bergeron, Jed Meunier, Michael Stambaugh, Patricia Raymond, Alexander Kryshen, Charles Goebel, Jonathan Eden, Igor Drobyshev
Large-scale modes of climate variability influence forest fire activity and may modulate the future patterns of natural disturbances. We studied the effects of long-term changes in climate upon the fire regime in the red pine forests of eastern North America using (a) a network of sites with dendrochronological reconstructions of fire histories over 1700–1900 A.D., (b) reconstructed chronologies of
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Changes in plant litter and root carbon inputs alter soil respiration in three different forests of a climate transitional region Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-08 Jiayin Feng, Chunyu Wang, Jingjing Gao, Huixia Ma, Zheng Li, Yuanfeng Hao, Xueli Qiu, Jingyi Ru, Jian Song, Shiqiang Wan
Both plant litter and roots are major sources of soil carbon (C) pools, however, the relative contributions of these two C input pathways to soil respiration, especially in different forest types, are largely unexplored, leading to a great uncertainty in estimating soil C sinks. As part of a field experiment with five-year (2016–2020) C input manipulations in three forests all between the subtropical
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Implications of energy balance non-closure on carbon dioxide flux uncertainties: Insights from large eddy simulations in convective boundary layers Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-07 Yanzhao Zhou, Heping Liu, Matthias Sühring, Xin Li
The non-closure of surface energy balance, often encountered in eddy covariance (EC) measurements, raises a critical query: does this non-closure lead to underestimated scalar fluxes, particularly CO flux (Fc), when using the same theoretical framework in EC? To address this question, we utilize high-resolution large-eddy simulations (LESs) to explore correlations between energy flux imbalances and
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Should two-parameter generalized complementary models for evaporation be simplified to single-parameter? A pairwise evaluation over grassland and forest sites Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-05 Songjun Han, Baozhong Zhang, Weijie Wang, Fuqiang Tian, Lei Wang
Models based on the complementary relationship for estimating evaporation typically incorporate two parameters, one for adjusting the relationship's shape and the other for formulating potential evaporation (). In practical applications, single-parameter versions are often derived by fixing one of these parameters. But there is ongoing debate about which parameter to fix and under what conditions.
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Modeling weather-driven long-distance dispersal of spruce budworm moths (Choristoneura fumiferana). Part 2: Flight model calibration using radar data Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-04 Matthew Garcia, Brian R. Sturtevant, Yan Boulanger, Jacques Régnière
In Part 1 of this series (Garcia et al., 2022), we introduced a novel individual-based model for the simulation of dispersal flight of adult spruce budworm (SBW: ) and demonstrated the results of that model under real weather conditions for two nights in July 2013 on which SBW mass dispersal events were observed by weather radar in southern Quebec, Canada. Here, following the selection of one uncertain
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Influence of film color, mulching ratio and soil–mulch contact degree on heat transfer in Northwest China Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-09-02 Yin Zhao, Zunqiu Xu, Xiaomin Mao, Sien Li, Xingchao Qi, Jiangang Che
The impact of diverse mulching factors on crop growth depends on their influences on heat transfer, while the precise effects of these factors on heat transfer remain unclear. To address this knowledge gap, we employed the CropSMPAC model to simulate energy fluxes and soil temperature under varying mulching conditions. Our study integrated a soil column experiment and a three–year field experiment
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Over 100-fold improvement in the accuracy of relaxed eddy accumulation flux estimates through error diffusion Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-30 Anas Emad
Measurements of atmosphere-surface exchange are largely limited by the availability of fast-response gas analyzers; this limitation hampers our understanding of the role of terrestrial ecosystems in atmospheric chemistry and global change. Current micrometeorological methods, compatible with slow-response gas analyzers, are difficult to implement, or rely on empirical parameters that introduce large
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Impacts of forest cover change on local temperature in Yangtze River Delta and Pearl River Delta urban agglomerations of China Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-29 Qing Liu, Wenjuan Shen, Tongyu Wang, Jiaying He, Pingting Cao, Tianyi Sun, Ying Zhang, Wenjing Ye, Chengquan Huang
The continuous economic and ecological construction in the Yangtze River Delta (YRD) and Pearl River Delta (PRD) has caused frequent temporal and spatial changes in local forests, thus affecting the regional climate. Yet few studies have addressed the temperature feedback through biophysical mechanisms due to forest change in two urban agglomerations of China. We compared MODIS and Landsat-based land
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Surface energy fluxes in a drip-irrigated agroecosystem: Unique advection effect of oasis Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-29 Haichao Yu, Tianyi Yang, Sien Li, Shaozhong Kang, Taisheng Du, Yuexin Wang, Haochong Chen, Hui Guo
Surface energy fluxes, mainly encompassing the net radiation (), latent heat flux (LE), sensible heat flux (), and soil heat flux (), play an important role in the land-atmosphere interactions. However, almost all sites face the problem of energy imbalance, and advection fluxes associated with large inhomogeneous surfaces have been ignored, especially in arid oasis areas. In this study, a three-year
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Canopy temperature dynamics are closely aligned with ecosystem water availability across a water- to energy-limited gradient Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-28 Mostafa Javadian, Russell L. Scott, William Woodgate, Andrew D. Richardson, Matthew P. Dannenberg, William K. Smith
Canopy temperature (T) plays an important role in regulating the rates of mass and energy fluxes at the leaf surface. Better understanding of the relationship between T and water availability may enable more accurate monitoring of ecosystem functioning in a changing climate. Here, we used high spatiotemporal resolution thermal infrared cameras deployed at three eddy covariance flux tower sites along
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Impacts of forest canopy heterogeneity on plot-scale hydrometeorological variables - Insights from an experiment in the humid boreal forest with the Canadian Land Surface Scheme Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-22 Philippe Lagueux, Jean-Daniel Sylvain, Guillaume Drolet, Pierre-Erik Isabelle, Gonzalo Leonardini, Daniel F. Nadeau, François Anctil
High latitude regions, including the circumpolar boreal biome, are experiencing important changes in the availability of usable surface water because of climate change. In this context, an adequate representation of the land-atmosphere interaction is critical to ensure optimal management of current and future water resources, forest management, and climate prediction. However, the task is particularly
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Effects of slow temperature acclimation of photosynthesis on gross primary production estimation Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-20 Jia Bai, Helin Zhang, Rui Sun, Yuhao Pan
The slow temperature acclimation of photosynthesis has been confirmed through early field experiments and studies. However, this effect is difficult to characterize and quantify with some simple and easily accessible indicators. As a result, the impact of slow temperature acclimation of photosynthesis on gross primary production (GPP) estimation has often been overlooked or not integrated into most
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Are the ecosystem-level evaporative stress indices representative of evaporative stress of vegetation? Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-19 Pushpendra Raghav, Mukesh Kumar
Evaporative Stress Index (ESI), also sometimes referred as Evaporative Stress Ratio (ESR), has been widely used as an indicator of vegetation evaporative stress, and is often used to track forest and agriculture droughts. Lower the stress, higher is the value of ESI or ESR. The goal of this study is to assess the suitability of these indices for tracking vegetation evaporative stress. As the dynamics
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How advection affects the surface energy balance and its closure at an irrigated alfalfa field Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-18 Tianxin Wang, Joseph Alfieri, Kanishka Mallick, Ariane Arias-Ortiz, Martha Anderson, Joshua B. Fisher, Manuela Girotto, Daphne Szutu, Joseph Verfaillie, Dennis Baldocchi
Orbiting around the non-closure problem in eddy covariance, a new generation of high-resolution thermal imagery has revealed that advection may be more common than previously expected. To investigate this, we conducted an extensive study over an irrigated alfalfa field that experienced heat and moisture advection. Over the course of five analysis periods (37 days total), multiple tower arrays and profile
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The carbon balance and water use efficiency of an intensively managed forage crop in the Lower Fraser Valley in British Columbia, Canada Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-16 Patrick K.C. Pow, Rachhpal S. Jassal, Mark Johnson, Sean Smukler, Zoran Nesic, T. Andrew Black
Intensively managed grasslands have been found to be either carbon (C) sources or sinks depending on management and climate. This study reports the net ecosystem production (NEP) and latent heat fluxes () from a managed forage field at a dairy farm in Agassiz, British Columbia, Canada. The forage crop (ryegrass and tall fescue) was harvested up to 6 times a year. The field received multiple applications
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Soil moisture plays an increasingly important role in constraining vegetation productivity in China over the past two decades Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-14 Guizeng Qi, Dunxian She, Jun Xia, Jinxi Song, Wenzhe Jiao, Jiayu Li, Zheqiong Liu
Decreasing soil moisture (SM) and increasing vapor pressure deficit (VPD) are the main drought affecting factors of terrestrial vegetation productivity. Nevertheless, the impact of continued warming on the changing trend of SM and VPD constraints affecting vegetation productivity remains uncertain. Understanding the complex interactive effects of SM and VPD on vegetation is crucial for assessing drought
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The applicability of a SIF-based mechanistic model for estimating GPP at the canopy scale Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-14 Yanping Liu, Zhaoyong Hu, Genxu Wang, Arthur Gessler, Shouqin Sun
Mechanistically linking gross primary productivity (GPP) and sun-induced chlorophyll fluorescence (SIF) is an essential step to unleash the full potential of SIF for remote sensing-based predictions of GPP across biomes, climates, and spatiotemporal scales. The latest SIF-based mechanistic light response model that includes the fraction of open photosystem II reaction centers as key parameter (qMLR-SIF
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Quantifying the effects of diffuse photosynthetically active radiation on water use efficiency in different ecosystems Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-14 Fenghao Chen, Xiaoya Yang, Qiang Yu, Bo Han
Compared with direct radiation, diffuse radiation could be more efficiently used for photosynthesis because of the diffuse fertilization effect (DFE). Because carbon uptake and water loss are coupled through leaf stomata, DFE probably increases gross primary productivity (GPP) and evapotranspiration (ET) simultaneously. Multi-year eddy covariance flux observation data and simulated diffuse fraction
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Temporal accumulation and lag effects of precipitation on carbon fluxes in terrestrial ecosystems across semi-arid regions in China Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-13 Haixing Gong, Guoyin Wang, Chenqing Fan, Xianwang Zhuo, Lina Sha, Zexing Kuang, Jianrong Bi, Tiantao Cheng
Precipitation (PRE) plays a vital role in hydrological processes, ecological vegetation, and land-atmosphere interactions in semi-arid regions. Previous research has mainly focused on the impact of PRE on large-scale regional climate change and ecological evolution. However, there have been few studies on the long-term effects of PRE on carbon fluxes in these regions, especially the time-accumulation
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Forest structural and microclimatic patterns along an elevational gradient in Mount Kenya Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-13 Jinlin Jia, Alice Catherine Hughes, Matheus Henrique Nunes, Erone Ghizoni Santos, Petri K.E. Pellikka, Leena Kalliovirta, James Mwang ombe, Eduardo Eiji Maeda
Tropical mountain forests are important biodiversity hotspots, which host disproportionally high number of endemic species. However, the potential impacts of climate change in these areas are uncertain. A key factor contributing to this knowledge gap is that climatic conditions experienced by organisms inside tropical forests (i.e., microclimate) remain largely understudied. Due to the effects of topography
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A Bayesian inference approach to determine experimental Typha latifolia paludiculture greenhouse gas exchange measured with eddy covariance Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-13 Alexander J.V. Buzacott, Merit van den Berg, Bart Kruijt, Jeroen Pijlman, Christian Fritz, Pascal Wintjen, Ype van der Velde
Measurements of greenhouse gas exchange (GHG) using the eddy covariance method are crucial for identifying strategies to achieve emission reductions and carbon sequestration. There are many sites that have heterogeneous land covers where it would be useful to have balances of particular land areas, such as field trials of emission mitigation strategies, but the flux footprint infrequently covers only
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Uncertainty of canopy interception modeling in high-altitude Picea crassifolia forests of Semi-arid regions Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-12 Junjun Yang, Zhibin He, Pengfei Lin, Jun Du, Dong Shi, Meng Bai
The study of physically-based rainfall interception is crucial for comprehending the water balance within forest ecosystems and the contribution of vegetation to the hydrological cycle, particularly in arid/semi-arid ecosystems. Despite its importance, there is a lack of comprehensive sensitivity analysis and parameter optimization, resulting in uncertain or suboptimal predictive accuracy. To mitigate
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Observed surface heat fluxes partitioning during the local growing season over the Tibetan Plateau Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-10 Mingshan Deng, Xianhong Meng, Danrui Sheng, Hanlin Niu, Peili Wu, Zhaoguo Li, Lin Zhao, Hao Chen, Lunyu Shang, Shaoying Wang, Shihua Lyu
Turbulent heat fluxes across the surface are an important mechanism of land-atmosphere coupling. But there is still a lack of sufficient observational measurements, particularly over the climate sensitive Tibetan Plateau (TP). This paper examines the partitioning between sensible and latent heat fluxes during growing season using the Bowen ratio as a diagnostic based on eddy covariance measurements
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Annual and seasonal dynamic of carbon sequestration in a Patagonian steppe Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-10 A. Burek, S.J. Bucci, L. Carbonell-Silletta, A. Cavallaro, J.O. Askenazi, D.A. Pereyra, M.P. Cristiano, G. Goldstein, F.G. Scholz
Arid and semiarid ecosystems comprise approximately 40 % of the global terrestrial surface and play an important role in the carbon-climate system. However, despite their large geographic extension in South America, they are largely under-represented in studies of ecosystem carbon fluxes. Eddy-covariance measurements of net ecosystem carbon exchange (NEE) were carried out in a Patagonian steppe co-dominated
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Water availability control the seasonal and inter-annual variability of CO2 fluxes in an alpine meadow on the eastern Tibetan Plateau Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-10 Shaoying Wang, Yu Zhang, Xianhong Meng, Lunyu Shang, Zhaoguo Li, Suosuo Li
Alpine ecosystems may be contribute to increasing atmospheric carbon dioxide (CO2) concentrations under intensified climate change on the Tibetan Plateau (TP). The eddy covariance technique was used in this research to examine how net ecosystem CO2 exchange (NEE) and its component fluxes, gross primary production (GPP), and ecosystem respiration (ER) varied over 10 years (from 2010 to 2019) in an alpine
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Geometry and surface manipulation impact on passive dew and rain collection Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-08 Soroush Moradi Zavie Kord, Juuso Tuure, Matti Räsänen, Szabolcs Galambosi, Laura Alakukku
In water-scarce regions, passive dew collectors may serve as vital supplementary water sources by collecting dew and rainwater, especially in arid or semi-arid African areas. This study examined enhancements to the standard passive dew collectors through a field experiment, which includes modification such as increased surface roughness through sandblasting (25 % coverage), adjusting panel geometry
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Solar-induced fluorescence-based phenology of subtropical forests in China and its response to climate factors Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-07 Jiacong Yu, Xuejian Li, Huaqiang Du, Fangjie Mao, Yanxin Xu, Zihao Huang, Yinyin Zhao, Lujin Lv, Meixuan Song, Lei Huang, Dejin Dong
Vegetation phenology refers to the cyclical changes of plant development in different seasons of the year, and is the result of the interaction between environmental factors and biological internal regulatory mechanisms. Current large-scale phenology studies mainly use vegetation indices for remote sensing retrieval, while the greenness information of subtropical forests is inconspicuous, causing regular
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Trees in cooler regions are more vulnerable to thermal stress: Evidence from temperate poplar plantations in Northern China during the 2022 heatwaves Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-03 Xin Kong, Shusen Zhang, Aoyu Wang, Yang Liu, Kai Wang, Xiaoning Zhao, Nan Di, Changjun Ding, Ximeng Li, Benye Xi
Climate change is resulting in more intense and frequent heatwaves, posing a potential threat to the structure and function of forest biome. However, due to the lack of in-situ data, the responses of forest plantations to heatwaves and the role of growth environments and management practices in mitigating these effects remain poorly understood. To address these knowledge gaps, we took advantage of
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Attention mechanism-based deep learning approach for wheat yield estimation and uncertainty analysis from remotely sensed variables Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-02 Huiren Tian, Pengxin Wang, Kevin Tansey, Jie Wang, Wenting Quan, Junming Liu
Rapid and accurate crop yield estimation is an imperative aspect of agricultural planning that is important for crop management, food security and commodity trading. There are many related factors affecting wheat yield and the relationship between them and the yield is complicated, with nonlinear spatial-temporal characteristics that are difficult to describe accurately with mathematical functions
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Grassland biomass allocation across continents and grazing practices and its response to climate and altitude Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-08-01 Jianjun Cao, Yumei Li, Asim Biswas, Nicholas M. Holden, Jan F. Adamowski, Fengchu Wang, Shuyan Hong, Yanyan Qin
Biomass allocation in grasslands is key to understanding plant response to environmental changes and grazing management. Yet, global studies on how this split between above-ground and below-ground biomass varies across continents and grazing practices are notably scarce. We employ a comprehensive field-oriented grassland database to examine differences in total net primary productivity (TNPP), above-ground
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Integrated large-eddy simulation for modeling plant-tissue warming induced by wind machines in an orchard canopy Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-30 Yi Dai, Antoon van Hooft, Edward G. Patton, Judith Boekee, Steven van der Linden, Marie-Claire ten Veldhuis, Bas J.H. van de Wiel
Wind machines are increasingly used to mitigate spring frost damage in agricultural sectors. Complementing quasi-3D temperature measurements to quantify the warming effects of wind machines (Dai et al., 2023), this study develops a numerical model to quantify warming effects on air and plant tissues and resolve the dynamic interplay between turbulent rotating plumes and canopy structure. We implement
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Agreement of multiple night- and daytime filtering approaches of eddy covariance-derived net ecosystem CO[formula omitted] exchange over a mountain forest Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-29 Alexander Platter, Katharina Scholz, Albin Hammerle, Mathias W. Rotach, Georg Wohlfahrt
The assessment of net ecosystem CO2 exchange often relies on eddy covariance measurements. Under stable, low-turbulence conditions, the measured flux may not be representative of the net ecosystem exchange (NEE), as unmeasured fluxes (e.g., advection) can become relevant. Consequently, such periods need to be filtered out for robust flux calculations. Typically, the focus lies on nighttime filtering
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Eddy covariance fluxes of greenhouse gasses observed in a renewed pasture in the southeast of Brazil Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-27 Osvaldo M.R. Cabral, Helber C. de Freitas, Santiago V. Cuadra, Sandra F. Nogueira, Luciano V. Koenigkan, Marcos A.V. Ligo, Cristiano A. de Andrade, John H. Gash, Humberto R. da Rocha, Paulo Rossi
The recovery of degraded pastures and the increase in their capacity for storing carbon is a key strategy in Brazil's commitment to meeting its Nationally Determined Contribution (NDC) to the international effort to halt global warming. Here we report the fluxes of CO2, N2O and CH4 gasses and their balances, obtained by the eddy covariance method, from a representative pasture area in southeast Brazil
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Drought-induced ecosystem resistance and recovery observed at 118 flux tower stations across the globe Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-27 Xingmin Shao, Yongqiang Zhang, Ning Ma, Xuanze Zhang, Jing Tian, Zhenwu Xu, Changming Liu
Drought resistance and drought recovery are important metrics of ecosystems in responding to extreme climate events. However, it remains unclear how drought resistance and drought recovery vary across different ecosystems and whether an internal relationship exists between them. Here, we used observed evapotranspiration and gross primary productivity from 118 flux tower stations worldwide to investigate
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Transpiration and water use sources of poplar (Populus × xiaozhuanica) plantations with 7-years vs. 20-years old in a semiarid sandy region of Northeast China Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-25 Lining Song, Jiaojun Zhu, Xin Liu, Jinxin Zhang, Xiao Zheng, Yirong Sun, Guochen Wang, Linyou Lü
Determination of transpiration and water use sources of trees in arid and semiarid areas is crucial for forest management under climate change scenes. Here, seasonal variations in transpiration and water use sources of the 7– (1167 trees ha−1) and 20 (475 trees ha−1)–year–old poplar (Populus × xiaozhuanica) plantations were determined based on thermal dissipation and stable isotope methods. Results
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Solar-induced chlorophyll fluorescence tracks canopy photosynthesis under dry conditions in a semi-arid grassland Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-24 Yunfei Wu, Zhaoying Zhang, Linsheng Wu, Yongguang Zhang
Solar-induced chlorophyll fluorescence (SIF) has recently emerged as a promising tool for estimating gross primary production (GPP). To date, there is ongoing debate regarding whether the strong correlations between SIF and GPP persist under dry conditions. Here, we conducted continuous far-red SIF measurements in a semi-arid grassland from 2017 to 2019 to investigate its association with GPP. Our
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Satellite-based monitoring of China's above-ground biomass carbon sink from 2015 to 2021 Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-24 Hongqian Fang, Lei Fan, Philippe Ciais, Jingfeng Xiao, Rasmus Fensholt, Jingming Chen, Frédéric Frappart, Weimin Ju, Shuli Niu, Xiangming Xiao, Wenping Yuan, Jiangzhou Xia, Xin Li, Liangyun Liu, Yuanwei Qin, Zhongbing Chang, Ling Yu, Guanyu Dong, Tianxiang Cui, Xiaojun Li, Jean-Pierre Wigneron
China's terrestrial ecosystems are pivotal in upholding the global carbon balance, with their recognized capacity for carbon sequestration holding significant importance on a global scale, but there are still challenges in accurately monitoring its spatial-temporal patterns. SMOSMAP-IB L-VOD, a recently developed low-frequency L-band Vegetation Optical Depth (L-VOD) product, was employed to monitor
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Overcoming mechanistic limitations of process-based phenological models: A data clustering method for large-scale applications Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-24 Jiaojiao Tan, Gang Zhao, Qi Tian, Lei Zheng, Xiaofeng Kang, Qinsi He, Yu Shi, Bin Chen, Dingrong Wu, Ning Yao, Liang He, Amit Kumar Srivastava, Yi Li, Jianqiang He, Hao Feng, Qiang Yu
Process-based phenological models use thermal requirement (TR) defined by planting date, temperature and photoperiod to predict crop developmental stages. The TR value for a specific developmental stage for a given variety is often presumed to be constant regardless of environmental conditions. We calibrated and compared 12 phenological models using 27-year of observation data of one unique rice (Oryza
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Ozone dose-response relationships for wheat can be derived using photosynthetic-based stomatal conductance models Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-23 P. Pande, F. Hayes, S. Bland, N. Booth, H. Pleijel, L.D. Emberson
Ground-level ozone (O3) pollution occurs across many important agricultural regions in Europe, North America, and Asia, negatively impacting O3-sensitive crops such as wheat. Risk assessment methods to quantify the magnitude and spatial extent of O3 pollution have often used dose-response relationships. In Europe, the dose metrics used in these relationships have evolved from concentration- to flux-based
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Multi-scale assessment of a cosmic-ray neutron probe observation of soil moisture for surface layer applications in a mountainous forest environment Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-20 Jaehwan Jeong, Seulchan Lee, Seongkeun Cho, Kiyoung Kim, Minha Choi
Soil moisture is critical to the Earth's water cycle as it influences water exchange between the land, atmosphere, and oceans. This study assessed the potential of a cosmic-ray neutron probe (CRNP) to monitor soil moisture dynamics in a forested mountain region, which is critical for water resource management and ecosystem health. Accurate soil moisture monitoring is essential for effectively managing
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Nonlinear contributions of surface solar brightening to maize yield gains in the US Corn Belt Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-19 H. Zhao, H. Yang, T.J. Avenson, G.F. Sassenrath, MB. Kirkham, S.W. Welch, L. Zhang, N. Wan, A.M. Nelson, P. Gowda, X. Lin
Surface solar radiation (SSR) determines the energy and climate of the Earth's biosphere, critically powering photosynthesis, thus contributing to productivity of crops like maize. SSR-use efficiency nonlinearly decreases with incident SSR, particularly at increasing SSR intensities, which are inefficiently converted into crop biomass. Here we analyze trends in SSR using both satellite- and ground-based
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Tailoring wheat agronomic management to ENSO phases to manage climate variability in Australia at 5-minute resolution Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-19 Juan Cao, Zhao Zhang, Jun Xie, Yuchuan Luo, Jichong Han, Patrick J. Mitchell, Fulu Tao
The El Niño Southern Oscillation (ENSO) significantly influences wheat yield variability in Australia. Tailoring crop agronomic managements to ENSO phases can effectively manage climate variability and reduce crop yield variability. Previous studies have mostly been conducted at a site scale, whose results are hardly extrapolated to a large heterogeneous area. Here, the CERES-Wheat model was calibrated
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Research on the characteristics, driving mechanism and spatial pattern of carbon sink in alpine ecosystem: A study case of Qilian Mountains Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-17 Yiwen Liu, Rensheng Chen, Chuntan Han, Zhangwen Liu, Yanni Zhao, Zhiwei Yang
Warming leads to significant loss of CO2 in high-altitude regions (HAR), posing threat to the carbon sink of terrestrial ecosystem. Additionally, the spatial distribution of environmental factors and underlying surfaces also determine the carbon sink pattern. Therefore, it is necessary to systematically explore the carbon sink of HAR. Based on it, choosing the Qilian Mountains (QLM) as the study area
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Snow redistribution decreases winter soil carbon loss in the Arctic dry heath tundra Agric. For. Meteorol. (IF 5.6) Pub Date : 2024-07-16 Yijing Liu, Wenxin Zhang, Birgitte Kortegaard Danielsen, Bo Elberling, Birger U. Hansen, Andreas Westergaard-Nielsen
Rapid warming increases winter soil carbon dioxide (CO2) efflux in Arctic tundra ecosystems, which can significantly offset carbon (C) uptake during growing seasons and affect the overall annual C balance. In winter, the Arctic landscape is predominantly covered with snow, which is vital for regulating ecological processes. Nevertheless, the impact of snow redistribution on the spatial distribution