01中国人为因素所致的氮沉降时空之变化.pdfVIP

OPEN Spatial and decadal variations in SUBJECT AREAS: inorganic nitrogen wet deposition in BIOGEOCHEMISTRY China induced by human activity ATMOSPHERIC CHEMISTRY 1,2 1 1 1 1 1 1,2 Yanlong Jia , Guirui Yu , Nianpeng He , Xiaoyun Zhan , Huajun Fang , Wenping Sheng , Yao Zuo , Received Dayong Zhang3 Qiufeng Wang1 24 October 2013 Accepted 1Synthesis Research Center of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and 24 December 2013 Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China, 2University of Chinese Academy of Sciences, Beijing 100049, China, 3College of Life Sciences, Beijing Normal University, Published Beijing 100875, China. 20 January 2014 Atmospheric nitrogen (N) deposition, an important component in the global N cycle, has increased sharply Correspondence and in recent decades in China. Here, we constructed national-scale inorganic N wet deposition (Ndep) patterns in China based on data from 280 observational sites and analysed the effects of anthropogenic sources and requests for materials precipitation on Ndep. Our results showed that the mean Ndep over China increased approximately 25%, should be addressed to from 11.11 kg ha21 a21 in the 1990s to 13.87 in the 2000s. Ndep was highest over southern China and G.R.Y. (yugr@igsnrr. exhibited a decreasing gra