Double‐counting challenges the accuracy of high‐latitude methane inventories
Double‐counting challenges the accuracy of high‐latitude methane inventories
复制标题
重复计算挑战高纬度甲烷清单的准确性
DOI：
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复制
发表时间：
2016
期刊：
影响因子：
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通讯作者：
P. Crill
中科院分区：
文献类型：
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作者：
B. Thornton;M. Wik;P. Crill
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).
影响因子：
11.6
作者：
M. Turetsky;A. Kotowska;J. Bubier;N. Dise;P. Crill;E. Hornibrook;K. Minkkinen;T. Moore;I. Myers-Smith
通讯作者：
M. Turetsky;A. Kotowska;J. Bubier;N. Dise;P. Crill;E. Hornibrook;K. Minkkinen;T. Moore;I. Myers-Smith
影响因子：
11.4
作者：
D. McGinnis;N. Bilsley;M. Schmidt;P. Fietzek;P. Bodmer;K. Premke;A. Lorke;S. Flury
通讯作者：
D. McGinnis;N. Bilsley;M. Schmidt;P. Fietzek;P. Bodmer;K. Premke;A. Lorke;S. Flury