DOI: 10.1002/2016GL071772
论文题名: Double-counting challenges the accuracy of high-latitude methane inventories
作者: Thornton B.F. ; Wik M. ; Crill P.M.
刊名: Geophysical Research Letters
ISSN: 0094-8298
EISSN: 1944-8029
出版年: 2016
卷: 43, 期: 24 起始页码: 12569
结束页码: 12577
语种: 英语
英文关键词: Arctic
; budget
; inventory
; methane
; methane sources
; top-down
Scopus关键词: Atmospheric chemistry
; Isotopes
; Methane
; Remote sensing
; Wetlands
; Arctic
; Atmospheric methanes
; Budget
; Double counting
; Fluvial systems
; Inventory
; Isotopic signatures
; Topdown
; Budget control
英文摘要: Quantification of the present and future contribution to atmospheric methane (CH4) from lakes, wetlands, fluvial systems, and, potentially, coastal waters remains an important unfinished task for balancing the global CH4 budget. Discriminating between these sources is crucial, especially across climate-sensitive Arctic and subarctic landscapes and waters. Yet basic underlying uncertainties remain, in such areas as total wetland area and definitions of wetlands, which can lead to conflation of wetlands and small ponds in regional studies. We discuss how in situ sampling choices, remote sensing limitations, and isotopic signature overlaps can lead to unintentional double-counting of CH4 emissions and propose that this double-counting can explain a pan-Arctic bottom-up estimate from published sources, 59.7 Tg yr−1 (range 36.9–89.4 Tg yr−1) greatly exceeding the most recent top-down inverse modeled estimate of the pan-Arctic CH4 budget (23 ± 5 Tg yr−1). ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007424339&doi=10.1002%2f2016GL071772&partnerID=40&md5=b914968b52859037326472598ea2f286
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9261
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Recommended Citation:
Thornton B.F.,Wik M.,Crill P.M.. Double-counting challenges the accuracy of high-latitude methane inventories[J]. Geophysical Research Letters,2016-01-01,43(24).