Stabilization of atmospheric nitrogen deposition in China over the past decade
Stabilization of atmospheric nitrogen deposition in China over the past decade
复制标题
近十年中国大气氮沉降趋于稳定
DOI：
10.1038/s41561-019-0352-4
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发表时间：
2019-06-01
影响因子：
18.3
通讯作者：
Goulding, Keith
中科院分区：
文献类型：
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作者：
Yu, Guirui;Jia, Yanlong;Goulding, Keith
大气氮沉降的增加可以从区域到全球范围内影响粮食生产、环境质量和气候变化。中国作为最大的发展中国家，预计将经历氮沉降的快速增长。然而，干态氮沉积信息的缺乏限制了我们对总氮沉积历史趋势的认识，以及对这一趋势的主要驱动因素的认识。在此基础上，我们利用包括干、湿氮沉降在内的大量数据集，对1980-2015年中国氮沉降及其组分的时空变化进行了评价。观测到中国氮沉积的三个显著转变。首先，2001-2005年总氮沉降开始趋于稳定，主要原因是湿态NH4+沉降减少。随后，2011-2015年，干湿氮沉降大致相等，干氮沉降增加。最后，随着NO3−沉积的增加，还原性N组分在沉积中的贡献减小。这些转变是由中国社会经济结构的变化和对氮污染的有力控制共同驱动的。观测到的三个重要转变挑战了中国氮沉积持续增加的传统观点。
Increasing atmospheric nitrogen deposition can influence food production, environmental quality and climate change from the regional to global scales. As the largest developing country, China is expected to experience a rapid increase in N deposition. However, the lack of information on dry N deposition limits our understanding of the historical trend of the total N deposition, as well as the main drivers of this trend. Here, we use extensive datasets that include both wet and dry N deposition to evaluate the spatiotemporal variation of N deposition and the changes of its components in China during 1980–2015. Three significant transitions in N deposition in China were observed. First, the total N deposition began to stabilize in 2001–2005, mostly due to a decline in wet NH4+deposition. Subsequently, a shift to approximately equal wet and dry N deposition occurred in 2011–2015, accompanied by increasing dry deposition. Finally, the contribution of reduced N components in the deposition decreased due to increasing NO3−deposition. These transitions were jointly driven by changes in the socioeconomic structure in China and vigorous controls in N pollution. The three observed important transitions challenge the traditional views about the continuous increase in N deposition in China.