DOI: 10.1002/2016GL070939
论文题名: Winter crop CO2 uptake inferred from CONTRAIL measurements over Delhi, India
作者: Umezawa T. ; Niwa Y. ; Sawa Y. ; Machida T. ; Matsueda H.
刊名: Geophysical Research Letters
ISSN: 0094-8394
EISSN: 1944-8125
出版年: 2016
卷: 43, 期: 22 起始页码: 11859
结束页码: 11866
语种: 英语
英文关键词: aircraft
; CO2
; CONTRAIL
; India
; rabi crop
Scopus关键词: Aircraft
; Boundary layer flow
; Boundary layers
; Budget control
; Crops
; Agricultural activities
; CONTRAIL
; Global carbon cycle
; High frequency HF
; India
; Metropolitan area
; Observation networks
; Vertical profile
; Carbon dioxide
; Triticum aestivum
英文摘要: Recent studies have shown the impact of expanding agricultural activities on atmospheric CO2 variations and the global carbon cycle. In this study, we show clear evidence of the measureable impact of Indian wintertime crops (mainly wheat) on the regional carbon budget using high-frequency atmospheric CO2 measurements by Comprehensive Observation Network for Trace gases by Airliners (CONTRAIL) over Delhi; this phenomenon is not detected by the existing network of surface CO2 sites. While a general increase in the vertical profiles of CO2 toward the ground in the boundary layer was observed throughout December–April, we frequently observed sharp decreases below 2 km during January–March. Seasonal circulations during these 3 months indicated influences from neighboring croplands (with patchy urban areas) located upwind. We conclude that the observed CO2 decrease is attributable to active uptake by the crops grown in winter and that the uptake exceeds in magnitude the urban CO2 emissions from the Delhi metropolitan area. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85004010198&doi=10.1002%2f2016GL070939&partnerID=40&md5=c9bd4a1f9d8ea21cceaac337e505d7cc
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9357
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: National Institute for Environmental Studies, Tsukuba, Japan
Recommended Citation:
Umezawa T.,Niwa Y.,Sawa Y.,et al. Winter crop CO2 uptake inferred from CONTRAIL measurements over Delhi, India[J]. Geophysical Research Letters,2016-01-01,43(22).