華北地區(qū)大氣氮沉降的空間格局和季節(jié)特征(英文)
發(fā)布時(shí)間:2021-05-20 08:15
作為農(nóng)業(yè)集約化和經(jīng)濟(jì)快速發(fā)展的地區(qū)之一,華北地區(qū)較高的氮沉降不容忽視。本文利用衛(wèi)星觀測(cè)的對(duì)流層柱濃度和大氣化學(xué)傳輸模型模擬的剖面信息,研究了華北地區(qū)氮沉降的空間格局和季節(jié)特征。結(jié)果表明,華北地區(qū)總氮沉降通量為16.3–106.5 kg N ha-1yr-1,平均為54.5±17.2 kg N ha-1yr-1。高值區(qū)主要集中在城市和農(nóng)田,低值區(qū)主要集中在人類(lèi)活動(dòng)較少的森林和草地。在總氮沉降量中,濕沉降量占36%;顆粒物干沉降量占12%;氣態(tài)干沉降占52%。對(duì)于干沉降來(lái)說(shuō),氣態(tài)HNO3和顆粒物NO3-在冬季和秋季較高,春季和夏季較低。與之相反,氣態(tài)NH3和顆粒物NH4+在春季和夏季較高,冬季和秋季較低。這可能是NOx和NH3排放源和排放強(qiáng)度的季節(jié)差異造成的。另外,氣態(tài)NO2沉降沒(méi)有明顯的季節(jié)變化。濕沉降主要受降水影響,呈現(xiàn)夏季高...
【文章來(lái)源】:Atmospheric and Oceanic Science Letters. 2020,13(03)CSCD
【文章頁(yè)數(shù)】:7 頁(yè)
【文章目錄】:
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
本文編號(hào):3197427
【文章來(lái)源】:Atmospheric and Oceanic Science Letters. 2020,13(03)CSCD
【文章頁(yè)數(shù)】:7 頁(yè)
【文章目錄】:
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
本文編號(hào):3197427
本文鏈接:http://sikaile.net/projectlw/qxxlw/3197427.html
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