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Regional to global distributions, trends, and drivers of biogenic volatile organic compound emission from 2001 to 2020 Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-18 Hao Wang, Xiaohong Liu, Chenglai Wu, Guangxing Lin
Abstract. Biogenic volatile organic compounds (BVOCs) are important precursors to ozone and secondary organic aerosols in the atmosphere, affecting air quality, clouds, and climate. However, the trend in BVOC emissions and driving factors for the emission changes in different geographic regions over the past 2 decades has remained unclear. Here, regional to global changes in BVOC emissions during 2001–2020
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Extension, development, and evaluation of the representation of the OH-initiated dimethyl sulfide (DMS) oxidation mechanism in the Master Chemical Mechanism (MCM) v3.3.1 framework Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-18 Lorrie Simone Denise Jacob, Chiara Giorio, Alexander Thomas Archibald
Abstract. Understanding dimethyl sulfide (DMS) oxidation can help us constrain its contribution to Earth's radiative balance. Following the discovery of hydroperoxymethyl thioformate (HPMTF) as a DMS oxidation product, a range of new experimental chamber studies have since improved our knowledge of the oxidation mechanism of DMS and delivered detailed chemical mechanisms. However, these mechanisms
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Sea salt reactivity over the northwest Atlantic: an in-depth look using the airborne ACTIVATE dataset Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-18 Eva-Lou Edwards, Yonghoon Choi, Ewan C. Crosbie, Joshua P. DiGangi, Glenn S. Diskin, Claire E. Robinson, Michael A. Shook, Edward L. Winstead, Luke D. Ziemba, Armin Sorooshian
Abstract. Chloride (Cl−) displacement from sea salt particles is an extensively studied phenomenon with implications for human health, visibility, and the global radiation budget. Past works have investigated Cl− depletion over the northwest Atlantic (NWA); however, an updated, multi-seasonal, and geographically expanded account of sea salt reactivity over the region is needed. This study uses chemically
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The impact of dehydration and extremely low HCl values in the Antarctic stratospheric vortex in mid-winter on ozone loss in spring Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-18 Yiran Zhang-Liu, Rolf Müller, Jens-Uwe Grooß, Sabine Robrecht, Bärbel Vogel, Abdul-Mannan Zafar, Ralph Lehmann
Abstract. Simulations of Antarctic chlorine and ozone chemistry show that in the core of the Antarctic vortex (16–18 km, 85–55 hPa, 390–430 K) HCl null cycles (initiated by reactions CH4 + Cl and CH2O + Cl) are effective. These HCl null cycles allow HCl mixing ratios to remain very low throughout Antarctic winter and ozone destroying chlorine (ClOx) to remain enhanced, so that rapid ozone depletion
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Spring tropical cyclones modulate near-surface isotopic compositions of atmospheric water vapour in Kathmandu, Nepal Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-15 Niranjan Adhikari, Jing Gao, Aibin Zhao, Tianli Xu, Manli Chen, Xiaowei Niu, Tandong Yao
Abstract. While westerlies are recognized as a significant moisture transport in Nepal during the pre-monsoon season, precipitation is also attributed to moisture from cyclones originating in the Bay of Bengal (BoB) or the Arabian Sea (AS). Tropical cyclones exhibit negative isotopic values in both precipitation and atmospheric water vapour; however, the factors influencing isotopic fractionation during
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Crucial role of obliquely propagating gravity waves in the quasi-biennial oscillation dynamics Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-15 Young-Ha Kim, Georg Sebastian Voelker, Gergely Bölöni, Günther Zängl, Ulrich Achatz
Abstract. In climate modelling, the reality of simulated flows in the middle atmosphere is largely affected by the model's representation of gravity wave processes that are unresolved, while these processes are usually simplified to facilitate computations. The simplification commonly applied in existing climate models is to neglect wave propagation in horizontal direction and time. Here we
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Climate change unevenly affects the dependence of multiple climate-related hazards in China npj Clim. Atmos. Sci. (IF 9.0) Pub Date : 2024-03-14 Xuezheng Zong, Yunhe Yin, Mijia Yin
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Skillful prediction of length of day one year ahead in multiple decadal prediction systems npj Clim. Atmos. Sci. (IF 9.0) Pub Date : 2024-03-14 Hyunsuk Yoon, Jung Choi, Seok-Woo Son, Adam A. Scaife
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Measurement report: Atmospheric ice nuclei in the Changbai Mountains (2623 m a.s.l.) in northeastern Asia Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-15 Yue Sun, Yujiao Zhu, Yanbin Qi, Lanxiadi Chen, Jiangshan Mu, Ye Shan, Yu Yang, Yanqiu Nie, Ping Liu, Can Cui, Ji Zhang, Mingxuan Liu, Lingli Zhang, Yufei Wang, Xinfeng Wang, Mingjin Tang, Wenxing Wang, Likun Xue
Abstract. Atmospheric ice nucleation plays an important role in modulating the global hydrological cycle and atmospheric radiation balance. To date, few comprehensive field observations of ice nuclei have been carried out at high-altitude sites, which are close to the height of mixed-phase cloud formation. In this study, we measured the concentration of ice-nucleating particles (INPs) in the immersion
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Oxidative potential apportionment of atmospheric PM1: a new approach combining high-sensitive online analysers for chemical composition and offline OP measurement technique Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-15 Julie Camman, Benjamin Chazeau, Nicolas Marchand, Amandine Durand, Grégory Gille, Ludovic Lanzi, Jean-Luc Jaffrezo, Henri Wortham, Gaëlle Uzu
Abstract. Source apportionment models were widely used to successfully assign highly time-resolved aerosol data to specific emissions and/or atmospheric chemical processes. These techniques are necessary for targeting the sources affecting air quality and for designing effective mitigation strategies. Moreover, evaluation of the toxicity of airborne particulate matter is important since the classically
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Emissions of Methane from Coal, Thermal power plants and Wetlands and its implications on Atmospheric Methane across the South Asian Region Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-15 Mahalakshmi D.Venkata, Mahesh Pathakoti, A. Lakshmi Kanchana, Sujatha Peethani, Ibrahim Shaik, Krishnan Sundara Rajan, Vijay Kumar Sagar, Pushpanathan Raja, Yogesh Kumar Tiwari, Chauhan Prakash
Abstract. Atmospheric methane (CH4) is a potent climate change agent responsible for a fraction of global warming. The present study investigated the spatial and temporal variability of atmospheric column-averaged (X) CH4 (XCH4) concentrations using Greenhouse gases Observing SATellite (GOSAT) and TROPOspheric Monitoring Instrument onboard the Sentienl-5 Precursor (S5P/TROPOMI) data from 2009 to 2022
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Observations of the vertical distributions of summertime atmospheric pollutants in Nam Co: OH production and source analysis Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-15 Chengzhi Xing, Cheng Liu, Chunxiang Ye, Xiangguang Ji, Jingkai Xue, Jinping Ou, Hongyu Wu, Qihou Hu
Abstract. The Tibetan Plateau (TP) plays a key role in regional environment and global climate change, however, the lack of vertical observation hinders a deeper understanding of the atmospheric chemistry and atmospheric oxidation capacity (AOC) on the TP. In this study, we conducted MAX-DOAS measurements at Nam Co, central TP, to observe the vertical profiles of aerosol, water vapor, NO2, HONO and
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Revisiting the evolution of downhill thunderstorms over Beijing: A new perspective from radar wind profiler mesonet Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-15 Xiaoran Guo, Jianping Guo, Tianmeng Chen, Ning Li, Fan Zhang, Yuping Sun
Abstract. Downhill thunderstorms frequently occur in Beijing during the rainy seasons, leading to substantial precipitation. The accurate intensity prediction of these events remains a challenge, partly attributed to insufficient observational studies that unveil the thermodynamic and dynamic structures along the vertical direction. This study provides a comprehensive methodology for identifying both
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Contribution of brown carbon to light absorption in emissions of European residential biomass combustion appliances Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-14 Satish Basnet, Anni Hartikainen, Aki Virkkula, Pasi Yli-Pirilä, Miika Kortelainen, Heikki Suhonen, Laura Kilpeläinen, Mika Ihalainen, Sampsa Väätäinen, Juho Louhisalmi, Markus Somero, Jarkko Tissari, Gert Jakobi, Ralf Zimmermann, Antti Kilpeläinen, Olli Sippula
Abstract. Residential biomass combustion significantly contributes to light-absorbing carbonaceous aerosols in the atmosphere, impacting the earth's radiative balance at regional and global levels. This study investigates the contribution of brown carbon (BrC) to the total particulate light absorption in the wavelength range of 370–950 nm (BrC370–950) and the particulate absorption Ångström exponents
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A machine learning approach to downscale EMEP4UK: analysis of UK ozone variability and trends Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-13 Lily Gouldsbrough, Ryan Hossaini, Emma Eastoe, Paul J. Young, Massimo Vieno
Abstract. High-resolution modelling of surface ozone is an essential step in the quantification of the impacts on health and ecosystems from historic and future concentrations. It also provides a principled way in which to extend analysis beyond measurement locations. Often, such modelling uses relatively coarse-resolution chemistry transport models (CTMs), which exhibit biases when compared to measurements
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Policy for material efficiency in homes and cars: Enabling new climate change mitigation strategies WIREs Clim. Chang. (IF 9.2) Pub Date : 2024-03-15 Reid Lifset, Edgar Hertwich, Tamar Makov
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Unveiling the dynamics of sequential extreme precipitation-heatwave compounds in China npj Clim. Atmos. Sci. (IF 9.0) Pub Date : 2024-03-11 Lijuan Miao, Lei Ju, Shao Sun, Evgenios Agathokleous, Qianfeng Wang, Zhiwei Zhu, Ran Liu, Yangfeng Zou, Yutian Lu, Qiang Liu
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Impacts of ice-nucleating particles on cirrus clouds and radiation derived from global model simulations with MADE3 in EMAC Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-14 Christof G. Beer, Johannes Hendricks, Mattia Righi
Abstract. Atmospheric aerosols can act as ice-nucleating particles (INPs) and influence the formation and the microphysical properties of cirrus clouds, resulting in distinct climate effects. We employ a global aerosol–climate model, including a two-moment cloud microphysical scheme and a parameterization for aerosol-induced ice formation in cirrus clouds, to quantify the climate impact of INPs on
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Decadal trends in observed surface solar radiation and their causes in Brazil in the first two decades of the 21st century Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-14 Lucas Ferreira Correa, Doris Folini, Boriana Chtirkova, Martin Wild
Abstract. Numerous studies have investigated the long term variability of surface solar radiation (SSR) around the world. However, the large disparity in the availability of observational data between developed and least developed/developing countries leads to an underrepresentation of studies on SSR changes in the latter. This is especially true for South America, where few observational studies have
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A statistical analysis of the occurrence of polar stratospheric ice clouds based on MIPAS satellite observations and the ERA5 reanalysis Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-14 Ling Zou, Reinhold Spang, Sabine Griessbach, Lars Hoffmann, Farahnaz Khosrawi, Rolf Müller, Ines Tritscher
Abstract. Small-scale temperature fluctuations can play a crucial role in the occurrence of ice clouds. This study analyzes a decade of ice polar stratospheric clouds (PSCs) occurrence obtained from Michelson Interferometer for Passive Atmospheric Sounding (MIPAS/Envisat) measurements. The points with the smallest temperature difference (ΔTice_min) between the frost point temperature (Tice) and the
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On the calculation of single-scattering properties of frozen droplets and frozen droplet aggregates observed in deep convective clouds Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-14 Jeonggyu Kim, Sungmin Park, Greg Michael McFarquhar, Anthony J. Baran, Joo Wan Cha, Kyoungmi Lee, Seoung Soo Lee, Chang Hoon Jung, Kyo-Sun Sunny Lim, Junshik Um
Abstract. During multiple field campaigns, small quasi-spherical ice crystals, commonly referred to as frozen droplets (FDs), and their aggregates (frozen droplet aggregates (FDAs)), have been identified as the predominant habits in the upper regions of deep convective clouds (DCCs) and their associated anvils. These findings highlight the significance of FDs and FDAs for understanding the microphysics
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Improving Ground-Level NO2 Estimation in China Using GEMS Measurements and a Nested Machine Learning Model Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-13 Naveed Ahmad, Changqing Lin, Alexis K. H. Lau, Jhoon Kim, Fangqun Yu, Chengcai Li, Ying Li, Jimmy C. H. Fung, Xiang Qian Lao
Abstract. The major bridge linking satellite-derived vertical column densities (VCDs) of nitrogen dioxide (NO2) with ground-level concentration is theoretically the NO2 mixing height (NMH). Various meteorological parameters have been used as a proxy of NMH in existing studies. This study developed a nested machine learning model to convert VCDs of NO2 into ground-level NO2 concentrations across China
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Development of a detailed gaseous oxidation scheme of naphthalene for SOA formation and speciation Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-13 Victor Lannuque, Karine Sartelet
Abstract. Naphthalene is the most abundant polycyclic aromatic hydrocarbon (PAH) in vehicle emissions and polluted urban areas. Its atmospheric oxidation products oxygenated compounds potentially harmful for health and/or contributing to secondary organic aerosol (SOA) formation. Despite its impact on air quality, its complex structure and lack of data mean that no detailed scheme of naphthalene gaseous
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Can we gain knowledge on COS anthropogenic and biogenic emissions from a single atmospheric mixing ratios measurement site? Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Antoine Berchet, Isabelle Pison, Camille Huselstein, Clément Narbaud, Marine Remaud, Sauveur Belviso, Camille Abadie, Fabienne Maignan
Abstract. Lack of knowledge still remains on many processes leading to COS atmospheric fluxes, either natural such as the oceanic emissions or the vegetation and soil fluxes, or anthropogenic, from industrial activities and power generation. Moreover, COS atmospheric mixing ratio data are still too sparse to evaluate the estimations of these sources and sinks. This study assesses the anthropogenic and
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Unequal transfer and its policy implications of carbon emissions and economic benefits embodied among Central Plains urban agglomeration Urban Clim. (IF 6.4) Pub Date : 2024-03-14 Shuan Peng, Min Chen, Zefeng Qi, Nihed Benani, Tao Wang, Xuefang Wu, Xi Cheng, Jian Lin Chen, Guozhu Mao, Pingjian Yang
Tracing the carbon emissions and economic benefits embodied in trade is crucial for the equitable allocation of mitigation responsibilities, particularly among cities in China, where studies on this topic are lacking. Therefore, this study selected the Central Plains Urban Agglomeration (CPUA) as a representative region. It compiled carbon emissions inventories following the 2006 IPCC guidelines and
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Mapping the seamless hourly surface visibility in China: a real-time retrieval framework using a machine-learning-based stacked ensemble model npj Clim. Atmos. Sci. (IF 9.0) Pub Date : 2024-03-13 Xutao Zhang, Ke Gui, Zhaoliang Zeng, Ye Fei, Lei Li, Yu Zheng, Yue Peng, Yurun Liu, Nanxuan Shang, Hengheng Zhao, Wenrui Yao, Hong Wang, Zhili Wang, Yaqiang Wang, Huizheng Che, Xiaoye Zhang
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Strengthened impact of boreal winter North Pacific Oscillation on ENSO development in warming climate npj Clim. Atmos. Sci. (IF 9.0) Pub Date : 2024-03-12 Shangfeng Chen, Wen Chen, Shang-Ping Xie, Bin Yu, Renguang Wu, Zhibiao Wang, Xiaoqing Lan, Hans-F Graf
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Seasonal characteristics of emission, distribution, and radiative effect of marine organic aerosols over the western Pacific Ocean: an investigation with a coupled regional climate aerosol model Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-13 Jiawei Li, Zhiwei Han, Pingqing Fu, Xiaohong Yao, Mingjie Liang
Abstract. Organic aerosols from marine sources over the western Pacific Ocean of East Asia were investigated using an online coupled regional chemistry–climate model RIEMS-Chem for the entire year 2014. Model evaluation against a wide variety of observations from research cruises and in situ measurements demonstrated a good skill of the model in simulating temporal variation and spatial distribution
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Influence of cloud retrieval errors due to three-dimensional radiative effects on calculations of broadband shortwave cloud radiative effect Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Adeleke S. Ademakinwa, Zahid H. Tushar, Jianyu Zheng, Chenxi Wang, Sanjay Purushotham, Jianwu Wang, Kerry G. Meyer, Tamas Várnai, Zhibo Zhang
Abstract. We investigate how cloud retrieval errors due to the three-dimensional (3D) radiative effects affect broadband shortwave (SW) cloud radiative effects (CREs) in shallow cumulus clouds. A framework based on the combination of large eddy simulations (LESs) and radiative transfer (RT) models was developed to simulate both one-dimensional (1D) and 3D radiance, as well as SW broadband fluxes. Results
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Investigation of ambient BTEX concentrations along a bus rapid transit route in Tabriz: Spatio-temporal variations and health risk assessment Urban Clim. (IF 6.4) Pub Date : 2024-03-13 Neda Hosseinpour, Zahra Sabeti, Hassan Aslani, Khaled Zoroufchi Benis, Mohammad Shakerkhatibi, Arash Najaflou, Masoumeh Malekzadeh, Raana Tayefeh Rahimian
Urgent actions are imperative to assess ambient BTEX concentration in urban areas and increase awareness of the significant health risks linked to exposure to these volatile compounds. This study examines the spatiotemporal variations of BTEX concentration in BRT stations and provides a health risk assessment in Tabriz, located in the northwest of Iran. We collected samples repeatedly from four BRT
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Enhancing urban climate resilience: A holistic evaluation of urban forest disservices in the aftermath of typhoons Urban Clim. (IF 6.4) Pub Date : 2024-03-13 Wan-Yu Liu, Chen-Rui Liu, Chun-Cheng Lin
Ecosystem services associated with urban forests have gained increasing attention, but there has been a relative lack of focus on the corresponding ecosystem disservices, including financial burdens, air pollution, allergens, pests, diseases, and safety concerns. Situated in the northwest Pacific Ocean, Taiwan faces the highest global number of tropical cyclones. Typhoons significantly damage the urban
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Influencing assessment of mask wearing on thermal comfort and pleasure during outdoor walking in hot summer region Urban Clim. (IF 6.4) Pub Date : 2024-03-13 Rong Hu, Jianlin Liu, Yongxin Xie, Yun Su, Zhaosong Fang, Yongfa Diao, Henggen Shen
Face masks are normally used by ones who work /walk outdoors to protect them away from air pollutants, for instance, traffic police, but the impact on the outdoor thermal perception is rarely reported in high-density cities during extreme hot summer. This study aims to explore the effect of face mask wearing on subjects' thermal perceptions with walking in Shanghai during summer. 796 valid questionnaires
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Common agronomic adaptation strategies to climate change may increase soil greenhouse gas emission in Northern Europe Agric. For. Meteorol. (IF 6.2) Pub Date : 2024-03-13 Diego Grados, David Kraus, Edwin Haas, Klaus Butterbach-Bahl, Jørgen Eivind Olesen, Diego Abalos
Climate change poses a significant threat to agriculture, highlighting the need for adaptation strategies to reduce its impacts. Agronomic adaptation strategies, such as changes in planting dates, fertilization, and irrigation, might sustain crop yield. However, their impact on soil greenhouse gas (GHG) emission is unknown under future climate scenarios. Using the LandscapeDNDC model, we assessed the
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Assessing the impact of weather forecast uncertainties in crop water stress model predictions Agric. For. Meteorol. (IF 6.2) Pub Date : 2024-03-13 Bachar Tarraf, François Brun, Laure Raynaud, Sébastien Roux, Yulin Zhang, Loic Davadan, Olivier Deudon
Since agriculture is highly exposed to weather-related risks such as drought constraints, Decision Support Tools (DSTs) are now frequently used in irrigation management. The current use of DSTs mainly relies on deterministic weather forecasts that do not account for the associated weather uncertainties. Few irrigation DST users take uncertainty into consideration by utilizing an ensemble of historical
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From peak to plummet: impending decline of the warm Arctic-cold continents phenomenon npj Clim. Atmos. Sci. (IF 9.0) Pub Date : 2024-03-11 Yungi Hong, S.-Y. Simon Wang, Seok-Woo Son, Jee-Hoon Jeong, Sang-Woo Kim, Baekmin Kim, Hyungjun Kim, Jin-Ho Yoon
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Fire–precipitation interactions amplify the quasi-biennial variability in fires over southern Mexico and Central America Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Yawen Liu, Yun Qian, Philip J. Rasch, Kai Zhang, Lai-yung Ruby Leung, Yuhang Wang, Minghuai Wang, Hailong Wang, Xin Huang, Xiu-Qun Yang
Abstract. Fires have great ecological, social, and economic impact. However, fire prediction and management remain challenges due to a limited understanding of their roles in the Earth system. Fires over southern Mexico and Central America (SMCA) are a good example of this, greatly impacting local air quality and regional climate. Here we report that the spring peak (April–May) of fire activities in
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WRF-SBM Numerical Simulation of Aerosol Effects on Stratiform Warm Clouds in Jiangxi, China Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Yi Li, Xiaoli Liu, Hengjia Cai
Abstract. Aerosols, as cloud condensation nuclei (CCN), impact cloud droplet spectrum and dispersion (ε), affecting precipitation and climate change. However, the influence of various aerosol modes on cloud physics remains controversial, and this effect varies with location and cloud type. This study uses a bin microphysics scheme (WRF-SBM) to simulate a warm stratiform cloud in Jiangxi, China. The
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Observed and CMIP6 model simulated organic aerosol response to drought in the contiguous United States during summertime Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Wei Li, Yuxuan Wang
Abstract. Drought events have been linked with the enhancements of organic aerosols (OA), but the mechanisms have not been comprehensively understood. This study investigates the relationships between the monthly standardized precipitation–evapotranspiration index (SPEI) and surface OA in the contiguous United States (CONUS) during the summertime from 1998 to 2019. OA under severe drought conditions
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Verifying national inventory-based combustion emissions of CO2 across the UK and mainland Europe using satellite observations of atmospheric CO and CO2 Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Tia Scarpelli, Paul Palmer, Mark Lunt, Ingrid Super, Arjan Droste
Abstract. Under the Paris Agreement, countries report their anthropogenic greenhouse gas emissions in national inventories, used to track progress towards mitigation goals, but they must be independently verified. Atmospheric observations of CO2, interpreted using inverse methods, can potentially provide that verification. Conventional CO2 inverse methods infer natural CO2 fluxes by subtracting a priori
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Regional and sectoral contributions of NOx and reactive carbon emission sources to global trends in tropospheric ozone during the 2000–2018 period Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Aditya Nalam, Aura Lupascu, Tabish Ansari, Timothy Butler
Abstract. Over the past few decades, the tropospheric ozone precursor anthropogenic emissions: nitrogen oxides (NOx) and reactive carbon (RC) from mid-latitude regions have been decreasing, and those from Asia and tropical regions have been increasing, leading to an equatorward emission redistribution. In this study, we quantify the contributions of various sources of NOx and RC emissions to tropospheric
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On the atmospheric budget of ethylene dichloride and its impact on stratospheric chlorine and ozone (2002–2020) Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Ryan Hossaini, David Sherry, Zihao Wang, Martyn Chipperfield, Wuhu Feng, David Oram, Karina Adcock, Stephen Montzka, Isobel Simpson, Andrea Mazzeo, Amber Leeson, Elliot Atlas, Charles C.-K. Chou
Abstract. Ethylene dichloride (EDC), or 1-2-dichloroethane, is an industrial very short-lived substance (VSLS) whose major use is as a feedstock in the production chain of polyvinyl chloride (PVC). Like other chlorinated VSLS, transport of EDC (or its atmospheric oxidation products) to the stratosphere could contribute to ozone depletion there. However, despite annual production volumes greatly exceeding
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Technical note: Influence of different averaging metrics and temporal resolutions on aerosol pH calculated by thermodynamic modeling Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-12 Haoqi Wang, Xiao Tian, Wanting Zhao, Jiacheng Li, Haoyu Yu, Yinchang Feng, Shaojie Song
Abstract. Aerosol pH is commonly used to characterize the acidity of aqueous aerosols and is of significant scientific interest due to its close relationship with atmospheric processes. Estimation of ambient aerosol pH usually relies on the thermodynamic modeling approach. In the existing chemical transport model and field observation studies, the temporal resolution of the input chemical and meteorological
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Morphological and optical properties of carbonaceous aerosol particles from ship emissions and biomass burning during a summer cruise measurement in the South China Sea Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-11 Cuizhi Sun, Yongyun Zhang, Baoling Liang, Min Gao, Xi Sun, Fei Li, Xue Ni, Qibin Sun, Hengjia Ou, Dexian Chen, Shengzhen Zhou, Jun Zhao
Abstract. Carbonaceous aerosols constitute a crucial component of atmospheric marine aerosols among which black carbon (BC) and brown carbon (BrC) are important contributors to light absorption and hence the positive climatic radiative forcing in the marine atmosphere. We conducted month-long (5 May–9 June 2021) onboard sample collections and online measurements of carbonaceous aerosols to characterize
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Aqueous-phase chemistry of glyoxal with multifunctional reduced nitrogen compounds: a potential missing route for secondary brown carbon Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-11 Yuemeng Ji, Zhang Shi, Wenjian Li, Jiaxin Wang, Qiuju Shi, Yixin Li, Lei Gao, Ruize Ma, Weijun Lu, Lulu Xu, Yanpeng Gao, Guiying Li, Taicheng An
Abstract. The aqueous-phase chemistry of glyoxal (GL) with reduced nitrogen compounds (RNCs) is a significant source for secondary brown carbon (SBrC), which is one of the largest uncertainties in climate predictions. However, a few studies have revealed that SBrC formation is affected by multifunctional RNCs, which have a non-negligible atmospheric abundance. Hence, we assessed theoretical and experimental
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Impact of courtyard orientation on thermal performance of school buildings' temperature Urban Clim. (IF 6.4) Pub Date : 2024-03-12 Muna Salameh, Bassam Abu-Hijleh, Basim Touqan
The focus on green efficient schools is increasing globally. Both private and public-school buildings in the UAE are considered high energy consumers, using significant amounts of energy to maintain a comfortable thermal environment for students. Unfortunately, the designs of these schools have overlooked traditional passive design solutions such as courtyard design and orientation, which can improve
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Evaluating methods for measuring the leaf area index of encroaching shrubs in grasslands: From leaves to optical methods, 3-D scanning, and airborne observation Agric. For. Meteorol. (IF 6.2) Pub Date : 2024-03-12 E. Greg Tooley, Jesse B. Nippert, Zak Ratajczak
Leaf area index (LAI) is a key variable describing ecosystem structure and influencing the exchange of carbon, water, and energy. LAI is often evaluated with indirect methods. However, the accuracy of indirect measurements can vary with canopy structure and is not always generalizable across ecosystems. Previous research has characterized the accuracy of indirect methods for woody plants in forest
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Formation mechanisms of persistent extreme precipitation events over the eastern periphery of the Tibetan Plateau: Synoptic conditions, moisture transport and the effect of steep terrain Atmos. Res. (IF 5.5) Pub Date : 2024-03-12 Zhao Ruiyu, Chen Bin, Zhang Wei, Yang Shuai, Xu XiangDe
The eastern periphery of the Tibetan Plateau (EPTP) is prone to frequent and severe Persistent Extreme precipitation (PEP) events in summer. Given the complexity of weather systems and the intricate nature of terrain over this region, the generation and development mechanisms of the PEP in the EPTP remain to be determined. In this study, the formation and persistence mechanisms are further explored
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An observation-constrained estimation of brown carbon aerosol direct radiative effects Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-11 Yueyue Cheng, Chao Liu, Jiandong Wang, Jiaping Wang, Zhouyang Zhang, Li Chen, Dafeng Ge, Caijun Zhu, Jinbo Wang, Aijun Ding
Abstract. Brown carbon (BrC) is an organic carbon component with noticeable absorption in the ultraviolet and short visible wavelengths, which influences the global radiative balance. However, assessing BrC radiative effects remains a challenging task owing to the scarcity of direct BrC observations and the uncertainties regarding their chemical and optical properties. This study proposes an efficient
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Tropical upper tropospheric trends in ozone and carbon monoxide (2005–2020): observational and model results Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-11 Lucien Froidevaux, Douglas E. Kinnison, Benjamin Gaubert, Michael J. Schwartz, Nathaniel J. Livesey, William G. Read, Charles G. Bardeen, Jerry R. Ziemke, Ryan A. Fuller
Abstract. We analyze tropical ozone (O3) and carbon monoxide (CO) distributions in the upper troposphere (UT) and their temporal changes for 2005–2020 using Aura Microwave Limb Sounder (MLS) observations and chemistry climate models. The models are the Whole Atmosphere Community Climate Model (WACCM6) and two variants of the Community Atmosphere Model with Chemistry (CAM-chem), each variant using different
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Plastic film mulching increases crop yields and reduces global warming potential under future climate change Agric. For. Meteorol. (IF 6.2) Pub Date : 2024-03-11 Li Zhang, Huihui Wei, Kaiping Zhang, Zhansheng Li, Feng-Min Li, Feng Zhang
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Climate factors influencing springtime dust activities over Northern East Asia in 2021 and 2023 Atmos. Res. (IF 5.5) Pub Date : 2024-03-11 Lin Liu, Zhili Wang, Huizheng Che, Deying Wang, Ke Gui, Bo Liu, Kangjie Ma, Xiaoye Zhang
In the springs of 2021 and 2023, northern East Asia experienced intense dust activities resulting in significant environmental and ecological impacts. This study explores the climate factors responsible for these strong dust activities in both springs. Results show that the anomalous surface warming during the late winter and early spring and the anomalous dry surface soil moisture in the spring are
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Variations in optical properties of water- and methanol-soluble organic carbon in PM2.5 in Tianjin and Handan over the Wintertime of 2018–2020 Atmos. Res. (IF 5.5) Pub Date : 2024-03-11 Haibiao Chen, Ruizhi Zhou, Li Fang, Honglei Sun, Qiaoyun Yang, Hongya Niu, Junwen Liu, Yingze Tian, Min Cui, Caiqing Yan
The impact of the Three-year Action Plan for winning the “blue sky defense battle” on the pollution levels and chemical characteristics of fine particulate matter has been intensively studied over the past few years. However, the effect of air pollution control on light absorption of brown carbon remains unclear. In this study, the light absorption and fluorescence properties of water- and methanol-soluble
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The response of global terrestrial water storage to drought based on multiple climate scenarios Atmos. Res. (IF 5.5) Pub Date : 2024-03-11 Wei Wei, Jiping Wang, Xufeng Wang, Peng Yan, Binbin Xie, Junju Zhou, Ting Liu, Dang Lu
Drought is a hydrological hazard phenomenon that spreads across the world and will become more intense and frequent with climate change in the future. How to scientifically and effectively monitor and evaluate drought events has become a significant issue. At present, various types of drought monitoring indices have been proposed. However, the criteria for drought that occurs in each month is different
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Effect of Secondary Ice Production Processes on the Simulation of ice pellets using the Predicted Particle Properties microphysics scheme Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-08 Mathieu Lachapelle, Mélissa Cholette, Julie M. Thériault
Abstract. Ice pellets can form when supercooled raindrops collide with small ice particles that can be generated through secondary ice production processes. The use of atmospheric models that neglect these collisions can lead to an overestimation of freezing rain. The objective of this study is therefore to understand the impacts of collisional freezing and secondary ice production on simulations of
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Variations in water conservation function and attributions in the Three-River Source Region of the Qinghai–Tibet Plateau based on the SWAT model Agric. For. Meteorol. (IF 6.2) Pub Date : 2024-03-10 Mei Li, Zhenhua Di, Yunjun Yao, Qian Ma
The water conservation function is one of the important ecosystem services.
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Microphysical properties of atmospheric soot and organic particles: measurements, modeling, and impacts npj Clim. Atmos. Sci. (IF 9.0) Pub Date : 2024-03-08 Weijun Li, Nicole Riemer, Liang Xu, Yuanyuan Wang, Kouji Adachi, Zongbo Shi, Daizhou Zhang, Zhonghua Zheng, Alexander Laskin
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Individual coal mine methane emissions constrained by eddy covariance measurements: low bias and missing sources Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-08 Kai Qin, Wei Hu, Qin He, Fan Lu, Jason Blake Cohen
Abstract. China's Shanxi Province accounts for 12 % of global coal output and therefore is responsible for a very large fraction of the total global methane (CH4) emissions, as well as being a large source of uncertainty due to the lack of in situ and field measurements. This work introduces the first comprehensive attempt to compute the coal mine methane (CMM) emissions throughout Shanxi, using a
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Interaction between marine and terrestrial biogenic volatile organic compounds: Non-linear effect on secondary organic aerosol formation Atmos. Chem. Phys. (IF 6.3) Pub Date : 2024-03-06 Xiaowen Chen, Lin Du, Zhaomin Yang, Shan Zhang, Narcisse Tsona Tchinda, Jianlong Li, Kun Li
Abstract. Biogenic volatile organic compounds (BVOCs) are the largest source of secondary organic aerosols (SOA) globally. However, the complex interactions between marine and terrestrial BVOCs remain unclear, inhibiting our in-depth understanding of the SOA formation in the coastal areas and its environmental impacts. Here, we performed smog chamber experiments with mixed α-pinene (a typical monoterpene)
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Multimodel ensemble estimation of Landsat-like global terrestrial latent heat flux using a generalized deep CNN-LSTM integration algorithm Agric. For. Meteorol. (IF 6.2) Pub Date : 2024-03-09 Xiaozheng Guo, Yunjun Yao, Qingxin Tang, Shunlin Liang, Changliang Shao, Joshua B. Fisher, Jiquan Chen, Kun Jia, Xiaotong Zhang, Ke Shang, Junming Yang, Ruiyang Yu, Zijing Xie, Lu Liu, Jing Ning, Lilin Zhang
Accurate estimates of high-spatial-resolution global terrestrial latent heat flux (LE) from Landsat data are crucial for many basic and applied research. Yet current Landsat-derived LE products were developed using single algorithm with large uncertainties and discrepancies. Here we proposed a convolutional neural network-long short-term memory (CNN-LSTM)-based integrated LE (CNN-LSTM-ILE) framework