Meteorological effects on sources and future projection of nitrogen deposition to lakes in China

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外文摘要：Lake ecosystems are extremely sensitive to nitrogen growth,which leads to water qual-ity degradation and ecosystem health decline.Nitrogen depositions,as one of the main sources of nitrogen in water,are expected to change under future climate change scenarios.However,it remains not clear how nitrogen deposition to lakes respond to future meteo-rological conditions.In this study,a source-oriented version of Community Multiscale Air Quality(CMAQ)Model was used to estimate nitrogen deposition to 263 lakes in 2013 and under three RCP scenarios(4.5,6.0 and 8.5)in 2046.Annual total deposition of 58.2 Gg ni-trogen was predicted for all lakes,with 23.3 Gg N by wet deposition and 34.9 Gg N by dry deposition.Nitrate and ammonium in aerosol phase are the major forms of wet deposi-tion,while NH3 and HNO3 in gas phase are the major forms of dry deposition.Agriculture emissions contribute to 57％of wet deposition and 44％of dry deposition.Under future me-teorological conditions,wet deposition is predicted to increase by 5.5％to 16.4％,while dry deposition would decrease by 0.3％to 13.0％.Changes in wind speed,temperature,relative humidity(RH),and precipitation rates are correlated with dry and wet deposition changes.The predicted changes in deposition to lakes driven by meteorological changes can lead to significant changes in aquatic chemistry and ecosystem functions.Apart from future emis-sion scenarios,different climate scenarios should be considered in future ecosystem health evaluation in response to nitrogen deposition.

外文关键词：

DepositionNitrogenLakesCMAQMeteorological variations

作者：

Cheng Shi、Hao Guo、Xue Qiao、Jingsi Gao、Ying Chen、Hongliang Zhang

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作者单位：

Department of Biological and Ecological Engineering,Oregon State University,Corvallis,OR 97331,USA

State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China

Institute of New Energy and Low-carbon Technology,Sichuan University,Chengdu 610065,China

Engineering Technology Development Center of Urban Water Recycling,Shenzhen Polytechnic,Shenzhen 518055,China

Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention,Department of Environmental Science and Engineering,Fudan University,Shanghai 200438,China

IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health,Fudan University,Shanghai 200438,China

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出版年：

2025

DOI：

10.1016/j.jes.2024.03.050

环境科学学报(英文版)

中科院生态环境研究中心

环境科学学报(英文版)

影响因子：0.862

ISSN：1001-0742

年,卷(期)：2025.151(5)