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

作　　者：Cheng Shi Hao Guo Xue Qiao Jingsi Gao Ying Chen Hongliang Zhang 

机构地区：[1]Department of Biological and Ecological Engineering,Oregon State University,Corvallis,OR 97331,USA [2]State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China [3]Institute of New Energy and Low-carbon Technology,Sichuan University,Chengdu 610065,China [4]Engineering Technology Development Center of Urban Water Recycling,Shenzhen Polytechnic,Shenzhen 518055,China [5]Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention,Department of Environmental Science and Engineering,Fudan University,Shanghai 200438,China [6]IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health,Fudan University,Shanghai 200438,China

出　　处：《Journal of Environmental Sciences》2025年第5期100-112,共13页环境科学学报(英文版)

基　　金：supported by the project of Guangzhou Institute of Geochemistry the Chinese Academy of Sciences(No.51TGC202209);Shenzhen Science and Technology Plan(Nos.KJYY20180206180737010 and 6020320003K);the National Key R&D Program of China(No.2022YFC3701105).

摘　　要：Lake ecosystems are extremely sensitive to nitrogen growth,which leads to water quality 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 meteorological 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 nitrogen 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 deposition,while NH3 and HNO_(3)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 meteorological 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 emission scenarios,different climate scenarios should be considered in future ecosystem health evaluation in response to nitrogen deposition.

关 键 词：Deposition Nitrogen LAKES CMAQ Meteorological variations 

分 类 号：X51[环境科学与工程—环境工程]