1996-2015年中国大气无机氮湿沉降时空格局数据集

A spatial and temporal dataset of atmospheric inorganic nitrogen wet deposition in China(1996–2015)

大气氮沉降是全球氮循环的重要过程,对自然生态系统结构和功能有重要影响。伴随着工农业快速发展和城市化进程,中国区域的大气氮沉降在近几十年急剧增加。为了对日益增加的氮沉降的生态环境效应进行科学地评估,准确地获取中国大气氮沉降的空间格局及其动态变化数据是重要的前提和关键环节。在本研究中,我们基于文献检索的大气无机氮湿沉降站点–年数据,通过克里格空间插值法生成了1996–2000年、2001–2005年、2006–2010年、2011–2015年连续4期的中国氮湿沉降空间格局数据集,其指标包括铵态氮(NH4^+-N)、硝态氮(NO3^--N)、可溶性无机氮(DIN为NH4^+-N与NO3^--N之和)3个指标,空间分辨率为1 km×1 km,数据格式为tiff。本数据集是基于地面实测数据生成的中国区域大气氮湿沉降空间格局的第一个可公开共享数据集,适用于1 km×1 km分辨率以上的中国湿沉降及生态效应的时空格局分析。本研究将为中国氮沉降的生态效应、环境效应等研究提供重要的基础数据,也可为国家层面的氮素管理提供政策支持。

Atmospheric nitrogen(N)deposition is a major process of global N cycle,importantly affecting the structure and function of natural ecosystems.With the rapid development of industry and agriculture under urbanization,N deposition in China had a sharp increase in recent decades.Therefore,how to get a spatial dataset of atmospheric N deposition is key to studying the ecological and environmental effects of N deposition on the ecosystems.Based on the site-year data of inorganic wet N deposition from published literature,we built the spatial dataset of wet N deposition during 1996–2000,2001–2005,2006–2010,and 2011–2015 in China by using geostatistical method.This dataset includes NH4^+-N,NO3^--N and DIN(sum of NH4^+-N and NO3^--N),with spatial resolution of 1 km×1 km,and it is in.tiff format.As the first openly accessible spatial data set of wet N deposition in China,it can be used to analyze the spatial and temporal patterns of wet N deposition and its ecological effects in China with a resolution of more than 1 km by 1 km,as well as policy support for N management at the national level.