新疆大气氮沉降监测研究进展浅析

Analysis on the Research Progress of Atmospheric Nitrogen Deposition Monitoring in Xinjiang

通过对新疆12个监测点氮沉降研究结果发现,无机活性氮浓度(p NH 4+、p NO 3-、NH 3、NO 2)在不同生态系统存在较大的时空差异,氮沉降通量变化随人为干扰程度呈递增趋势。总结了当前新疆大气氮沉降监测研究进展,包括主要监测方法、不同生态系统大气氮素干沉降的时空差异性分析、大气氮素干湿沉降通量估算。对大气氮素干湿沉降通量的整体估算、不同生态系统的监测常态化等还存在不足,未来评估氮沉降的综合气候效应、定量临界负荷以及生态系统对氮沉降通量急剧增加的响应是今后研究的重点方向。

Through the study of nitrogen deposition at 12 monitoring points in Xinjiang,it was found that the concentration of inorganic active nitrogen(p NH 4+,p NO 3-,NH 3,NO 2)has a great spatial-temporal difference in different ecosystems,and the change of nitrogen deposition flux showed an increasing trend with the degree of human disturbance.The research progress of atmospheric nitrogen deposition monitoring in Xinjiang is summarized,including main monitoring methods,spatial-temporal difference analysis of atmospheric nitrogen dry deposition in different ecosystems,and estimation of atmospheric nitrogen dry and wet deposition flux.There are still deficiencies in the overall estimation of atmospheric nitrogen precipitation flux and the normalization of monitoring of different ecosystems.The key research direction in the future is to evaluate the comprehensive climate effect of nitrogen precipitation,quantitative critical load and the response of ecosystem to the rapid increase of nitrogen precipitation flux.