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Global Forest Plantations Mapping and Biomass Carbon Estimation J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-18 Hongtao Xu, Bin He, Lanlan Guo, Xing Yan, Yelu Zeng, Wenping Yuan, Ziqian Zhong, Rui Tang, Yang Yang, Huiming Liu, Yaning Chen
Management of forest plantations is a natural based solution to the global-scale mitigation of climate change; however, the role of carbon sequestration remains poorly understood, and this is hampered by a lack of detailed distribution on the global forest plantations. For the first time, we generated a global spatial distribution for forest plantations (GSDFP) during 2015 at a spatial resolution of
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Diffuse Fertilization Effect in Maize and Soybean Is Driven by Improved Light Use Efficiency Rather Than by Light Absorption J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-18 Zhaoyang Zhang, Kailing Zhu, Meng Fan, Quan Wang, Yunhui Tan
Diffuse radiation can improve the efficiency of terrestrial carbon uptake. Both light absorption and canopy light use efficiency (LUE) are affected by the fraction of diffuse radiation (DF). However, the relative contribution of these two factors to the diffuse fertilization effect (DFE) in the short term is not well understood. To investigate the mechanism of DFE in cropland, we collected gross primary
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Sediment Addition Leads to Variable Responses in Temperate Salt Marsh Greenhouse Gas Fluxes During the Growing Season J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-16 Nia N. Bartolucci, Robinson W. Fulweiler
Salt marshes play an important role in coastal carbon cycling. Unfortunately, these systems are threatened by sea level rise. One strategy to increase the resilience of marshes is thin-layer placement of sediment (TLP). While TLP can boost elevation, little is known about how TLP alters greenhouse gas fluxes. We addressed this knowledge gap by measuring greenhouse gas fluxes in TLP plots that received
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Experimental Whole-Ecosystem Warming Enables Novel Estimation of Snow Cover and Depth Sensitivities to Temperature, and Quantification of the Snow-Albedo Feedback Effect J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-15 Andrew D. Richardson, Christina Schädel, Andreas Westergaard-Nielsen, Kimberly A. Novick, David Basler, Jana R. Phillips, Misha B. Krassovski, Jeffrey M. Warren, Stephen D. Sebestyen, Paul J. Hanson
Climate change is reducing the amount, duration, and extent of snow across high-latitude ecosystems. But, in landscapes where persistent winter snow cover develops, experimental platforms to specifically investigate interactions between warming and changes in snowpack, and impacts on ecosystem processes, have been lacking. We leveraged a whole-ecosystem warming experiment in a boreal peatland forest
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Albedo-Induced Global Warming Potential Following Disturbances in Global Temperate and Boreal Forests J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-12 Qingsong Zhu, Jiquan Chen, Bourque Charles P.-A., Oliver Sonnentag, Leonardo Montagnani, Thomas L. O’Halloran, Russell L. Scott, Jeremy Forsythe, Bo Song, Huimin Zou, Meihui Duan, Xianglan Li
Forest disturbances can result in very different canopies that carry elevated albedo, thus causing substantial cooling effects on the climate. Unfortunately, the resulting dynamic global warming potential from altered albedo (GWPΔα) is poorly understood. We examined and modeled the changes in albedo over time after disturbances (i.e., forest age) by forest type, disturbance type and geographic location
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Characteristics of Dissolved Organic Matter in Uranium Hosting Aquifers and Potential Molecular Transformation During Neutral In Situ Leaching J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-12 Chongsheng Lu, Wei Xiu, Bing Yang, Guoxi Lian, Tianjing Zhang, Erping Bi, Huaming Guo
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Developing a Redox Network for Coastal Saltmarsh Systems in the PFLOTRAN Reaction Model J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-08 T. A. O’Meara, F. Yuan, B. N. Sulman, G. L. Noyce, R. Rich, P. E. Thornton, J. P. Megonigal
Coastal ecosystems have been largely ignored in Earth system models but are important zones for carbon and nutrient processing. Interactions between water, microbes, soil, sediments, and vegetation are important for mechanistic representation of coastal processes and ecosystem function. To investigate the role of these feedbacks, we used a reactive transport model (PFLOTRAN) that has the capability
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Accounting for Winter Warming Events in the Ecosystem Model LPJ-GUESS: Evaluation and Outlook J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-08 D. Pascual, M. Johansson, A. Pongracz, J. Tang
Winter warming events (WWEs) are short-lasting events of unusually warm weather, occasionally combined with rainfall, which can cause severe ecosystem impacts by altering ground temperatures and water fluxes. Despite their importance, how large-scale ecosystem models perform in depicting the impacts of WWEs remain largely unknown. The frequency and intensity of WWEs will likely increase further in
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Reparameterizing Litter Decomposition Using a Simplified Monte Carlo Method Improves Litter Decay Simulated by a Microbial Model and Alters Bioenergy Soil Carbon Estimates J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-08 S. M. Juice, J. R. Ridgeway, M. D. Hartman, W. J. Parton, D. M. Berardi, B. N. Sulman, K. E. Allen, E. R. Brzostek
Litter decomposition determines soil organic matter (SOM) formation and plant-available nutrient cycles. Therefore, accurate model representation of litter decomposition is critical to improving soil carbon (C) projections of bioenergy feedstocks. Soil C models that simulate microbial physiology (i.e., microbial models) are new to bioenergy agriculture, and their parameterization is often based on
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Agricultural Land-Use Increases Carbon Yields in Lowland Streams of the Congo Basin J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-08 Travis W. Drake, Simon Baumgartner, Matti Barthel, Marijn Bauters, Serge Alebadwa, Nadine Bahizire Akoko, Negar Haghipour, Timothy Eglinton, Kristof Van Oost, Pascal Boeckx, Johan Six
As the dominant mode of deforestation in the Congo Basin, shifting agriculture is expected to increase with the projected four-fold population growth for the region by 2,100. To assess how this land-use change will affect the export of carbon (C) to rivers in a typical lowland forest ecosystem, we studied paired watersheds near Kisangani, Democratic Republic of the Congo. Two streams, one draining
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Evaluation of Leaf-To-Canopy Upscaling Approaches for Simulating Canopy Carbonyl Sulfide Uptake and Gross Primary Productivity J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-07 Bin Chen, Pengyuan Wang, Shaoqiang Wang, Zhenhai Liu, Holly Croft
Carbonyl sulfide (COS) measurements provide an important mechanism for quantifying the terrestrial carbon and water cycles. Terrestrial photosynthesis can be inferred from vegetative uptake of COS due to the shared diffusion pathway of COS and CO2 into the chloroplasts. However, the efficacy of different leaf-to-canopy upscaling approaches for estimating plant COS uptake and photosynthesis at the canopy
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Variability in Forest Plant Traits Along the Western Ghats of India and Their Environmental Drivers at Different Resolutions J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-06 Ting Zheng, Zhiwei Ye, Aditya Singh, Ankur R. Desai, N. S. R. Krishnayya, Maulik G. Dave, Philip A. Townsend
Imaging spectroscopy offers great potential to characterize plant traits at fine resolution across broad regions and then assess controls on their variation across spatial resolutions. We applied permutational partial least-squares regression to map seven key foliar chemical and morphological traits using NASA's Airborne Visible/Infrared Imaging Spectrometer-Next Generation (AVIRIS-NG) for six sites
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Planktonic Marine Fungi: A Review J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-03 Xuefeng Peng, Anthony S. Amend, Federico Baltar, Leocadio Blanco-Bercial, Eva Breyer, Gaëtan Burgaud, Michael Cunliffe, Virginia P. Edgcomb, Hans-Peter Grossart, Paraskevi Mara, Hossein Masigol, Ka-Lai Pang, Alice Retter, Cordelia Roberts, Judith van Bleijswijk, Allison K. Walker, Syrena Whitner
Fungi in marine ecosystems play crucial roles as saprotrophs, parasites, and pathogens. The definition of marine fungi has evolved over the past century. Currently, “marine fungi” are defined as any fungi recovered repeatedly from marine habitats that are able to grow and/or sporulate in marine environments, form symbiotic relationships with other marine organisms, adapt and evolve at the genetic level
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Difference in the Contribution of Driving Factors to Nitrogen Loss With Surface Runoff Between the Hill and Plain Agricultural Watersheds J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-03-01 Zhen Cui, Cheng Chen, Qiuwen Chen, Jiacong Huang
Identifying the factors and quantifying their contributions to nitrogen (N) loss associated with surface runoff is of great significance to the control of non-point source N pollution. However, the distinct geographical units, such as hills and plains, may lead to great differences in the contribution of these driving factors, which has been rarely investigated. This study developed an effective framework
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Impacts of Hydrology and Extreme Events on Dissolved Organic Carbon Dynamics in a Heavily Urbanized Estuary and Its Major Tributaries: A View From Space J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-29 Fang Cao, Maria Tzortziou
Dissolved organic matter and its colored component, Colored Dissolved Organic Matter (CDOM), play a major role in global carbon budgets, and their fluxes provide an essential link between terrestrial and aquatic biogeochemical cycles. Satellite observations can uniquely capture the hydro-biogeochemical connectivity of terrestrial and aquatic landscapes, across scales. Yet, accurate satellite retrievals
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Environmental and Management Drivers of Carbon Dioxide and Methane Emissions From Actively-Extracted Peatlands in Alberta, Canada J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-28 M. L. Hunter, R. J. Frei, I. B. Strachan, M. Strack
The installation of drainage ditches and removal of vegetation in preparation for vacuum harvesting alters the carbon dynamics of peatlands. However, we lack the measurements to understand the spatial distribution and environmental and substrate quality controls of carbon dioxide (CO2) and methane (CH4) emissions, as well as how these factors change over the 20–30 year extraction period. For three
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Quantification of the Airborne Fraction of Atmospheric CO2 Reveals Stability in Global Carbon Sinks Over the Past Six Decades J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-27 Brian F. Bennett, Ross J. Salawitch, Laura A. McBride, Austin P. Hope, Walter R. Tribett
The airborne fraction of atmospheric CO2 (AF), defined as the annual global CO2 growth rate (dCO2/dt) divided by the total emission of CO2 from combustion of fossil fuels and land use change (LUC), has a long-term average of ∼0.44 over the past six decades. When quantifying trends in AF it is important to account for inter-annual variability in dCO2/dt due to natural factors such as the El Niño Southern
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Alternating Conditional Expectations: Introducing a Non-Parametric Statistical Method to Interpret Long-Term Greenhouse Gas Flux Measurements Over Semi-Arid and Wetland Ecosystems J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-26 Dennis D. Baldocchi, Ariane Arias Ortiz
We explore the potential of using a non-parametric statistical method called Alternating Conditional Expectations, ACE, to quantify functional relationships in biogeosciences. Here, ACE is used to quantify the non-linear and multi-faceted responses of greenhouse gas fluxes to a set of biophysical forcings, when the shapes of those response surfaces are unknown. We evaluated the statistical method over
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Issue Information J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-26
No abstract is available for this article.
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Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-24 Qianqian Yang, Shuai Chen, Yuxin Li, Boyi Liu, Lishan Ran
Inland waters are significant emitters of greenhouse gases for the atmosphere and play an important role in the global carbon cycle. With a vast land area in East Asia spanning a broad range of climatic conditions, China has a large number of natural and human-made water bodies. These inland water systems are of global importance because of their high carbon emission fluxes. Over the past decades,
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Reservoir Drawdown Highlights the Emergent Effects of Water Level Change on Reservoir Physics, Chemistry, and Biology J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-19 Abigail S. L. Lewis, Adrienne Breef-Pilz, Dexter W. Howard, Mary E. Lofton, Freya Olsson, Heather L. Wander, Cecelia E. Wood, Madeline E. Schreiber, Cayelan C. Carey
Water level drawdowns are increasingly common in lakes and reservoirs worldwide as a result of both climate change and water management. Drawdowns can have direct effects on physical properties of a waterbody (e.g., by altering stratification and light dynamics), which can interact to modify the waterbody's biology and chemistry. However, the ecosystem-level effects of drawdown remain poorly characterized
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Twenty Years of Progress, Challenges, and Opportunities in Measuring and Understanding Soil Respiration J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-22 Ben Bond-Lamberty, Ashley Ballantyne, Erin Berryman, Etienne Fluet-Chouinard, Jinshi Jian, Kendalynn A. Morris, Ana Rey, Rodrigo Vargas
Soil respiration (Rs), the soil-to-atmosphere flux of CO2, is a dominant but uncertain part of the carbon cycle, even after decades of study. This review focuses on progress in understanding Rs from laboratory incubations to global estimates. We survey key developments of in situ ecosystem-scale Rs observations and manipulations, synthesize Rs meta-analyses and global flux estimates, and discuss the
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Allochthonous Groundwater Microorganisms Affect Coastal Seawater Microbial Abundance, Activity and Diversity J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-21 Keren Yanuka-Golub, Natalia Belkin, Nurit Weber, Meor Mayyani, Yehuda Levy, Itay J. Reznik, Maxim Rubin-Blum, Eyal Rahav, Yael Kiro
Submarine groundwater discharge (SGD) is a globally important process supplying nutrients and trace elements to the coastal environment, thus playing a pivotal role in sustaining marine primary productivity. Along with nutrients, groundwater also contains allochthonous microbes that are discharged from the terrestrial subsurface into the sea. Currently, little is known about the interactions between
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Empirical Dynamic Modeling Reveals Complexity of Methane Fluxes in a Temperate Salt Marsh J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-20 Andrew C. Hill, Karina V. R. Schäfer, Inke Forbrich, Rodrigo Vargas
Methane dynamics within salt marshes are complex because vegetation types, temperature, oscillating water levels, and changes in salinity and redox conditions influence CH4 production, consumption, oxidation, and emissions. These non-linear and complex interactions among variables affect the traditionally expected functional relationships and present challenges for interpreting and developing process-based
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Linking Transpiration to Reef Nitrogen Supply on a Tropical Coral Island J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-19 Dirk V. Erler, Christine L. Dudgeon, Asia O. Armstrong, Eddie W. Banks, Orlando Ramirez-Valle, Hugo A. Gutiérrez-Jurado, Ben L. Gilby, Kathy A. Townsend
Coral reef islands are biodiversity hotspots with high conservation value, but we have a poor understanding of how island vegetation, through transpiration, influences groundwater nutrient supply to adjacent reef systems. Here we combine stable isotope tracing, geophysical surveys, and satellite analysis to unravel the links between transpiration and the discharge of groundwater nitrate to the waters
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Simulated Future Shifts in Wildfire Regimes in Moist Forests of Pacific Northwest, USA J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-22 Alex W. Dye, Matt J. Reilly, Andy McEvoy, Rebecca Lemons, Karin L. Riley, John B. Kim, Becky K. Kerns
Fire is an integral natural disturbance in the moist temperate forests of the Pacific Northwest of the United States, but future changes remain uncertain. Fire regimes in this climatically and biophysically diverse region are complex, but typically climate limited. One challenge for interpreting potential changes is conveying projection uncertainty. Using projections of Energy Release Component (ERC)
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Peatlands Versus Permafrost: Landscape Features as Drivers of Dissolved Organic Matter Composition in West Siberian Rivers J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-21 Sommer F. Starr, Karen E. Frey, Laurence C. Smith, Anne M. Kellerman, Amy M. McKenna, Robert G. M. Spencer
West Siberia contains some of the largest soil carbon stores on Earth owing to vast areas of peatlands and permafrost, with the region warming far faster than the global average. Organic matter transported in fluvial systems is likely to undergo distinct compositional changes as peatlands and permafrost warm. However, the influence of peatlands and permafrost on future dissolved organic matter (DOM)
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On-Orbit Spatial Performance Characterization for Thermal Infrared Imagers of Landsat 7, 8, and 9, ECOSTRESS and CTI J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-14 T. R. H. Holmes, B. Poulter, J. McCorkel, D. E. Jennings, D. L. Wu, B. Efremova, A. Shiklomanov, W. R. Johnson, M. Jhabvala, S. J. Hook
In this analysis of the spatial resolving power of thermal imagery products we focus on four satellite instruments that are used in research and applications, for example, to monitor land surface temperature and derive evapotranspiration. These are thermal imagers on Landsat 7, Landsat 8, and Landsat 9, as well as the ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS).
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Grass Evolutionary Lineages Can Be Identified Using Hyperspectral Leaf Reflectance J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-13 Ryan Slapikas, Stephanie Pau, Ryan C. Donnelly, Che-Ling Ho, Jesse B. Nippert, Brent R. Helliker, William J. Riley, Christopher J. Still, Daniel M. Griffith
Hyperspectral remote sensing has the potential to map numerous attributes of the Earth’s surface, including spatial patterns of biological diversity. Grasslands are one of the largest biomes on Earth. Accurate mapping of grassland biodiversity relies on spectral discrimination of endmembers of species or plant functional types. We focused on spectral separation of grass lineages that dominate global
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Seasonal Wetlands Make a Relatively Limited Contribution to the Dissolved Carbon Pool of a Lowland Headwater Tropical Stream J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-07 Vanessa Solano, Clément Duvert, Lindsay B. Hutley, Dioni I. Cendón, Damien T. Maher, Christian Birkel
Wetlands process large amounts of carbon (C) that can be exported laterally to streams and rivers. However, our understanding of wetland inputs to streams remains unclear, particularly in tropical systems. Here we estimated the contribution of seasonal wetlands to the C pool of a lowland headwater stream in the Australian tropics. We measured dissolved organic and inorganic C (DOC and DIC) and dissolved
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Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-06 Arial J. Shogren, Jay P. Zarnetske, Benjamin W. Abbott, Amelia L. Grose, Abigail F. Rec, Jansen Nipko, Chao Song, Jonathan A. O’Donnell, William B. Bowden
Climate change is rapidly altering hydrological processes and consequently the structure and functioning of Arctic ecosystems. Predicting how these alterations will shape biogeochemical responses in rivers remains a major challenge. We measured [C]arbon and [N]itrogen concentrations continuously from two Arctic watersheds capturing a wide range of flow conditions to assess understudied event-scale
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Mercury Mobility in Epibenthic Waters of a Deltaic Environment J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-02 Daniel Cossa, Duc Huy Dang, Bastien Thomas
Mercury (Hg) cycling at the sediment-water interfaces (SWI) encompasses multiple homogeneous and heterogeneous biogeochemical reactions whose result is not yet elucidated. Estuarine SWIs, where the organic matter mineralization is active, constitute experimental sites particularly suitable for scrutinizing Hg speciation and mobilization. Here, we present high-resolution vertical concentration profiles
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Issue Information J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-29
No abstract is available for this article.
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Crucial Role of Bacterial Processes in the Net Community Production of the Amundsen Sea Polynya Disclosed by a Modeling Study J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-30 Young Shin Kwon, Doshik Hahm, Tae Siek Rhee, Hyoun-Woo Kang
We investigated seasonal net community production (NCP) variations in the productive Amundsen Sea Polynya, integrating observational data and ecosystem modeling. NCP estimates (NCPO2/Ar) from in situ O2/Ar data during the austral summer (January-March) from 2011 to 2018 were compared with those from a one-dimensional ecosystem model. Early January saw the highest NCPO2/Ar values ranging from 115 to
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Climatic Constraints of Spring Phenology and Its Variability on the Mongolian Plateau From 1982 to 2021 J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-02-01 Zhihui Yuan, Gang Bao, Altantuya Dorjsuren, Ayisha Oyont, Jiquan Chen, Fei Li, Gang Dong, Enliang Guo, Changliang Shao, Lingtong Du
The start of vegetation growing season (SOS) plays an important role in the energy cycle between the land and atmosphere. Due to the limited temporal span of a single satellite sensor through time, the continuous variation of the SOS over 40 years has not been adequately quantified. Using the overlapping periods (2001–2015) between the Global Inventory Modeling and Mapping Studies (GIMMS) (1982–2015)
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Warm Early Summer Compensated Reduction in Photosynthesis Caused by 2022 Late Summer Extreme Drought Over the Tibetan Plateau J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-25 Ran Yan, Xunmei Wang, Jun Wang, Jingye Tan, Weimin Ju
The Tibetan Plateau (TP) is ecologically delicate, its vegetation highly sensitive to climate variations. In 2022, China endured an unprecedented compound drought-heatwave, escalating TP's August temperature to a record high since 2000. This study examined this event's impact on TP's photosynthesis using multi-source satellite-based products. We demonstrated persistent high temperatures from April
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Predicting Methane Formation Rates of Freshwater Sediments in Different Biogeographic Regions J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-23 Simone Moras, Ursula Ronja Zellmer, Evelina Hiltunen, Charlotte Grasset, Sebastian Sobek
Freshwater lakes and reservoirs cover a small fraction of the Earth, however their emission of the greenhouse gas methane (CH4) from the sediment to the atmosphere is disproportionately high. Currently, there is still a limited understanding of the links between sediment characteristics and CH4 formation. Earlier studies have indicated that sediment age and nitrogen content are related to sediment
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Vegetation Index-Based Models Without Meteorological Constraints Underestimate the Impact of Drought on Gross Primary Productivity J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-23 Xin Chen, Tiexi Chen, Shuci Liu, Yuanfang Chai, Renjie Guo, Jie Dai, Shengzhen Wang, Lele Zhang, Xueqiong Wei
Recently developed solar-induced chlorophyll fluorescence-related vegetation indices (e.g., near infrared reflectance of vegetation (NIRv) and kernel normalized difference vegetation index (kNDVI)) have been reported to be appropriate proxies for vegetation photosynthesis. These vegetation indices can be used to estimate gross primary productivity (GPP) without considering meteorological constraints
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Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-19 Dirk Jong, Lisa Bröder, Tommaso Tesi, George Tanski, Mickolai Oudenhuijsen, Michael Fritz, Hugues Lantuit, Negar Haghipour, Timothy Eglinton, Jorien Vonk
Erosion of permafrost coasts due to climate warming releases large quantities of organic carbon (OC) into the Arctic Ocean. While burial of permafrost OC in marine sediments potentially limits degradation, resuspension of sediments in the nearshore zone potentially enhances degradation and greenhouse gas production, adding to the “permafrost carbon feedback.” Recent studies, focusing on bulk sediments
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Temporal Error Correlations in a Terrestrial Carbon Cycle Model Derived by Comparison to Carbon Dioxide Eddy Covariance Flux Tower Measurements J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-12 Daniel Wesloh, Klaus Keller, Sha Feng, Thomas Lauvaux, Kenneth J. Davis
Atmospheric CO2 flux inversions require as input an estimate of spatial and temporal correlations of errors in their estimate of the prior mean. Some previous studies have used the differences in CO2 daily average flux estimates produced by terrestrial carbon cycle models and eddy covariance measurements to constrain the flux error correlations. Since inversions are starting to resolve the daily cycle
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Hyperspectral and Photodiode Retrievals of Nighttime LED-Induced Chlorophyll Fluorescence (LEDIF) for Tracking Photosynthetic Phenology in a Vineyard J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-11 Christopher Y. S. Wong, Devin P. McHugh, Nicolas Bambach, Andrew J. McElrone, Maria Mar Alsina, William P. Kustas, Troy S. Magney
The magnitude of chlorophyll fluorescence emission represents both chlorophyll content and energy quenching processes enabling its application to serve as a proxy of photosynthetic activity. Thus, there is interest in advancing methods for canopy-scale monitoring of chlorophyll fluorescence. Remotely sensed solar-induced fluorescence (SIF) retrievals offer daytime monitoring of chlorophyll fluorescence
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Assessing Hydrology, Biogeochemistry, and Organic Micropollutants in an Urban Stream-Aquifer System: An Interdisciplinary Data Set J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-10 Andrea L. Popp, Robin Weatherl, Christian Moeck, Juliane Hollender, Mario Schirmer
Urban expansion leads to increasing water pollution, impacting both human health and ecosystems. This decline in water quality often stems from insufficient wastewater treatment, along with runoff from both urban and agricultural areas. Water quality degradation challenges our efforts for sustainable water management and hinders progress toward the UN's Sustainable Development Goals (SDGs), particularly
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Spatial Patterns and Controls on Wind Erosion in the Great Basin J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-08 Ronald S. Treminio, Nicholas P. Webb, Brandon L. Edwards, Akasha Faist, Beth Newingham, Emily Kachergis
The Great Basin of the western United States is experiencing dramatic increases in wildfire and Bromus species invasion that potentially accelerate wind erosion and plant community change. We used a wind erosion model parameterized for rangelands and standard ecological monitoring data sets collected at 10,779 locations from 2011 to 2019 to characterize potential wind erosion in the Great Basin, assess
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Dimethyl Sulfide Emissions From a Peatland Result More From Organic Matter Degradation Than Sulfate Reduction J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-05 Ann-Sophie Lehnert, Rebecca E. Cooper, Rebecca Ignatz, Alexander Ruecker, Eliane Gomes-Alves, Kirsten Küsel, Georg Pohnert, Susan E. Trumbore
Volatile sulfur compounds (VSCs) contribute to acid rain, cloud formation, and albedo, and thus influence the climate. Their global emissions are quite uncertain, especially contributions from freshwater wetlands. We investigated the processes leading to hydrogen sulfide (H2S), methanethiol (MeSH), and dimethyl sulfide (Me2S) emissions in a slightly acidic peatland and found multiple indications that
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Similarities in Storage and Transport of Sulfate in Forested and Suburban Watersheds, Despite Anthropogenically Elevated Suburban Sulfate J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-04 C. L. Cosans, M. L. Gomes, M. J. Marsh, J. Moore, C. J. Harman
Sulfate is a potential pollutant and important nutrient linked with the nitrogen, carbon, and phosphorus cycles. The importance of different anthropogenic sulfate sources in suburban streams (septic systems, fertilizer, road salt, and infrastructure) is uncertain, and the temporal dynamics of stream export sparsely documented. We study sources and export dynamics of sulfate in suburban and forested
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Relationships Between Land Use and Terrestrial Organic Matter Transfer to the Baltic Sea Over the Last 500 Years J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-05 Bingjie Yang, Karl Ljung, Wenxin Ning, Helena L. Filipsson, Anne Birgitte Nielsen
Terrestrial organic matter (OM) plays a key role in coastal organic carbon burial. However, few studies focus on the relationship between land use in the watershed and the transport of terrestrial OM to coasts from a long-term perspective. In this study, we compared terrestrial OM deposition between an inlet of the Baltic Sea and an upstream lake within the same watershed over the last 500 years, using
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Spatial Patterns of Vegetation Activity Related to ENSO in Northern South America J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-05 Lina M. Estupinan-Suarez, Miguel D. Mahecha, Alexander Brenning, Guido Kraemer, Germán Poveda, Markus Reichstein, Carlos A. Sierra
Interannual variability of vegetation activity (i.e., photosynthesis) is strongly correlated with El Niño Southern Oscillation (ENSO). Globally, a reduction in carbon uptake by terrestrial ecosystems has been observed during the ENSO warm phase (El Niño) and the opposite during the cold phase (La Niña). However, this global perspective obscures the heterogeneous impacts of ENSO at regional scales.
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A Greenhouse Gas Budget for Mexico During 2000–2019 J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-02 Guillermo Murray-Tortarolo, Kevin Perea, Alma Mendoza-Ponce, Amparo Martínez-Arroyo, Fabiola Murguía-Flores, Víctor J. Jaramillo, Montserrat Serrano-Medrano, Miguel García-García, Rodrigo Vargas, Abhishek Chatterjee, Anna Michalak, Zhen Zhang, Jonathan A. Wang, Benjamin Poulter
Application of the best available science to improve quantification of greenhouse gas (GHG) emissions at regional and national scales is key to climate action. Here, we present a two-decade (2000–2019) GHG (CO2, CH4, and N2O) budget for Mexico derived from multiple products. Data from the National GHG Inventory, global observations, and the scientific literature were compared to identify knowledge
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Assessing Phytoplankton Primary Productivity Variability in the Changjiang Estuary, East China Sea From Coupled Fast Repetition Rate (FRR) Fluorometry and Chlorophyll-a Measurements J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-03 Yuanli Zhu, David J. Hughes, Yuanyuan Feng, Thomas J. Browning, Ping Du, Qicheng Meng, Shengqiang Wang, Bing Wang, Dewang Li, Zhibing Jiang, Jiangning Zeng
Phytoplankton primary productivity (PP) varies significantly over environmental gradients, particularly in physically-dynamic systems such as estuaries and coastal seas. During summer, runoff peaks in the Changjiang River driving large environmental gradients in both the Changjiang estuary and adjacent East China Sea (ECS), likely driving significant variability in PP. As satellite models of PP often
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Carbon Stocks and Potential Greenhouse Gas Production of Permafrost-Affected Active Floodplains in the Lena River Delta J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2024-01-02 Tanja Herbst, Matthias Fuchs, Susanne Liebner, Claire C. Treat
Arctic warming increases the degradation of permafrost soils but little is known about floodplain soils in the permafrost region. This study quantifies soil organic carbon (SOC) and soil nitrogen stocks, and the potential CH4 and CO2 production from seven cores in the active floodplains in the Lena River Delta, Russia. The soils were sandy but highly heterogeneous, containing deep, organic rich deposits
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Issue Information J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-28
No abstract is available for this article.
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A Comprehensive Biogeochemical Assessment of Climate-Threatened Glacial River Headwaters on the Eastern Slopes of the Canadian Rocky Mountains J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-29 J. A. Serbu, V. L. St. Louis, C. A. Emmerton, S. E. Tank, A. S. Criscitiello, U. Silins, M. P. Bhatia, M. A. Cavaco, C. Christenson, C. A. Cooke, H. F. Drapeau, S. J. A. Enns, J. E. Flett, K. M. Holland, J. Lavallee-Whiffen, M. Ma, C. E. Muir, M. Poesch, J. Shin
Climate change is driving the loss of alpine glaciers globally, yet investigations about the water quality of rivers stemming from them are few. Here we provide an overview assessment of a biogeochemical data set containing 200+ parameters that we collected between 2019 and 2021 from the headwaters of three such rivers (Sunwapta-Athabasca, North Saskatchewan, and Bow) which originate from the glacierized
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Responses of Soil Fungi to Long-Term Nitrogen-Water Interactions Depend on Fungal Guilds in a Mixed Pinus koraiensis Forest J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-27 W. Guo, C. Wang, I. Brunner, Y. Zhou, Q. Tang, J. Wang, M.-H. Li
Different fungal guilds within the soil fungal community regulate forest ecosystem processes. Soil fungi are dictated by edaphic factors such as soil water and nutrient availabilities. However, how the total number of fungi and the composition of different fungal guilds in the soil vary under covarying pattern of nitrogen deposition and precipitation regime in temperate forests has not been well documented
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Net Methane Production Predicted by Patch Characteristics in a Freshwater Wetland J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-27 Sean J. Sharp, Christine E. Maietta, Graham A. Stewart, Aileen K. Taylor, Michael R. Williams, Margaret A. Palmer
Methane (CH4) dynamics in wetlands are spatially variable and difficult to estimate at ecosystem scales. Patches with different plant functional types (PFT) represent discrete units within wetlands that may help characterize patterns in CH4 variability. We investigate dissolved porewater CH4 concentrations, a representation of net CH4 production and potential source of atmospheric flux, in five wetland
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Coupled Si–Al Biogeochemistry: Occurrence of Aluminum in Diatom-Derived Biogenic Silica J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-27 Dong Liu, Qian Tian, Mengyuan Li, Mei Mi, Peng Yuan, Rongda Yu, Junming Zhou, Peixin Du, Huihuang Wei, Haozhe Guo, Liangliang Deng
Diatoms play an important role in the biogeochemical cycling of aluminum (Al) in oceans. This occurs via the uptake of biological Al (Albio), which is incorporated into the structure of diatom-derived biogenic silica (DBSi) and the formation of adsorbed Al (Alads) on the DBSi surface of post-mortem diatoms. Al occurrence influences DBSi dissolution and thus diatom-driven carbon sequestration. However
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Biophysical Drivers of Coastal Treeline Elevation J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-22 G. D. Molino, J. A. Carr, N. K. Ganju, M. L. Kirwan
Sea level rise is leading to the rapid migration of marshes into coastal forests and other terrestrial ecosystems. Although complex biophysical interactions likely govern these ecosystem transitions, projections of sea level driven land conversion commonly rely on a simplified “threshold elevation” that represents the elevation of the marsh-upland boundary based on tidal datums alone. To determine
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Heterogeneous Diazotroph Communities in the Subtropical-Subantarctic Transition and Aphotic Zones Off the Coast of Patagonia, Eastern South Pacific Ocean J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-22 Takuhei Shiozaki, Miho Hirai, Fumie Kondo, Takuya Sato, Miyako Sato, José L. Iriarte, Taichi Yokokawa, Takuro Nunoura, Naomi Harada
Subtropical-subpolar transition water is a potential domain for N2 fixation, but the understanding of N2 fixation in such waters remains incomplete. We simultaneously examined the N2 fixation activity and community structures of diazotrophs and all prokaryotes from the surface to just above the seafloor off Patagonia in the transitional region of the eastern South Pacific Ocean. N2 fixation activity
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Large Methane Emissions From Tree Stems Complicate the Wetland Methane Budget J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-21 L. C. Jeffrey, C. A. Moras, D. R. Tait, S. G. Johnston, M. Call, J. Z. Sippo, N. C. Jeffrey, D. Laicher-Edwards, D. T. Maher
Our understanding of tree stem methane (CH4) emissions is evolving rapidly. Few studies have combined seasonal measurements of soil, water and tree stem CH4 emissions from forested wetlands, inhibiting our capacity to constrain the tree stem CH4 flux contribution to the total wetland CH4 flux. Here we present annual data from a subtropical freshwater Melaleuca quinquenervia wetland forest, spanning
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A Novel High-Resolution In Situ Tool for Studying Carbon Biogeochemical Processes in Aquatic Systems: The Lake Aiguebelette Case Study J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-20 R. Grilli, T. DelSontro, J. Garnier, F. Jacob, J. Némery
Lakes and reservoirs are a significant source of atmospheric methane (CH4), with emissions comparable to the largest global CH4 emitters. Understanding the processes leading to such significant emissions from aquatic systems is therefore of primary importance for producing accurate projections of emissions in a changing climate. In this work, we present the first deployment of a novel membrane inlet
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Links Between Stream Water Nitrogen and Terrestrial Vegetation in Northeast Greenland J. Geophys. Res. Biogeosci. (IF 3.7) Pub Date : 2023-12-15 Tenna Riis, Jennifer L. Tank, Cecilie M. H. Holmboe, Pau Giménez-Grau, Mikhail Mastepanov, Núria Catalán, David Stott, Birgitte Hansen, Søren M. Kristiansen, Ada Pastor
The Arctic is warming and significant changes to the landscape, including increased vegetative cover (“greening”), are expected in the near future. These landscape changes may alter nitrogen (N) availability in terrestrial, stream, and coastal ecosystems, where production is often N limited, but the exact changes in nutrient cycling are uncertain. Here, we analyzed the relationship between vegetation