华北地区大气氮沉降的空间格局和季节特征(英文)
发布时间:2021-05-20 08:15
作为农业集约化和经济快速发展的地区之一,华北地区较高的氮沉降不容忽视。本文利用卫星观测的对流层柱浓度和大气化学传输模型模拟的剖面信息,研究了华北地区氮沉降的空间格局和季节特征。结果表明,华北地区总氮沉降通量为16.3–106.5 kg N ha-1yr-1,平均为54.5±17.2 kg N ha-1yr-1。高值区主要集中在城市和农田,低值区主要集中在人类活动较少的森林和草地。在总氮沉降量中,湿沉降量占36%;颗粒物干沉降量占12%;气态干沉降占52%。对于干沉降来说,气态HNO3和颗粒物NO3-在冬季和秋季较高,春季和夏季较低。与之相反,气态NH3和颗粒物NH4+在春季和夏季较高,冬季和秋季较低。这可能是NOx和NH3排放源和排放强度的季节差异造成的。另外,气态NO2沉降没有明显的季节变化。湿沉降主要受降水影响,呈现夏季高...
【文章来源】:Atmospheric and Oceanic Science Letters. 2020,13(03)CSCD
【文章页数】:7 页
【文章目录】:
1. Introduction
2. Data and methods
2.1. Data
2.2. Methods
3. Results and discussion
3.1. Accuracy assessment of the estimated N deposition
3.2. Spatial distribution of N species deposition
3.3. Seasonal variation of dry and wet N deposition
3.4.Seasonal variation of NH4+-N and NO3--Ndeposition
4. Conclusions
Data availability
Disclosure statement
本文编号:3197427
【文章来源】:Atmospheric and Oceanic Science Letters. 2020,13(03)CSCD
【文章页数】:7 页
【文章目录】:
1. Introduction
2. Data and methods
2.1. Data
2.2. Methods
3. Results and discussion
3.1. Accuracy assessment of the estimated N deposition
3.2. Spatial distribution of N species deposition
3.3. Seasonal variation of dry and wet N deposition
3.4.Seasonal variation of NH4+-N and NO3--Ndeposition
4. Conclusions
Data availability
Disclosure statement
本文编号:3197427
本文链接:https://www.wllwen.com/projectlw/qxxlw/3197427.html