气象对中国湖泊氮沉降源的影响及未来预测

IF 5.9 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Cheng Shi , Hao Guo , Xue Qiao , Jingsi Gao , Ying Chen , Hongliang Zhang
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引用次数: 0

摘要

湖泊生态系统对氮的增长极为敏感,氮的增长会导致水质恶化和生态系统健康状况下降。氮沉积是水中氮的主要来源之一,预计在未来气候变化情况下会发生变化。然而,目前仍不清楚湖泊中的氮沉积如何应对未来的气象条件。在这项研究中,我们使用了面向源的社区多尺度空气质量(CMAQ)模型版本,估算了 2013 年和 2046 年三种 RCP 情景(4.5、6.0 和 8.5)下 263 个湖泊的氮沉降量。根据预测,所有湖泊的年氮沉积总量为 58.2 千兆克,其中湿沉积为 23.3 千兆克,干沉积为 34.9 千兆克。气溶胶中的硝酸盐和铵是湿沉积的主要形式,而气相中的 NH3 和 HNO3 是干沉积的主要形式。农业排放占湿沉降的 57%,占干沉降的 44%。在未来的气象条件下,预计湿沉降将增加 5.5% 至 16.4%,而干沉降将减少 0.3% 至 13.0%。风速、温度、相对湿度和降水率的变化与干沉积和湿沉积的变化相关。由气象变化引起的湖泊沉积物的预测变化会导致水生化学和生态系统功能的显著变化。除了未来的排放情景,在评估氮沉积对未来生态系统健康的影响时,还应考虑不同的气候情景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Meteorological effects on sources and future projection of nitrogen deposition to lakes in China

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 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 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.

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来源期刊
Journal of Environmental Sciences-china
Journal of Environmental Sciences-china 环境科学-环境科学
CiteScore
13.70
自引率
0.00%
发文量
6354
审稿时长
2.6 months
期刊介绍: The Journal of Environmental Sciences is an international journal started in 1989. The journal is devoted to publish original, peer-reviewed research papers on main aspects of environmental sciences, such as environmental chemistry, environmental biology, ecology, geosciences and environmental physics. Appropriate subjects include basic and applied research on atmospheric, terrestrial and aquatic environments, pollution control and abatement technology, conservation of natural resources, environmental health and toxicology. Announcements of international environmental science meetings and other recent information are also included.
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