DOI: 10.1002/grl.50453
论文题名: Spatiotemporal distribution patterns of dissolved methane in lakes: How accurate are the current estimations of the diffusive flux path?
作者: Hofmann H.
刊名: Geophysical Research Letters
ISSN: 0094-8939
EISSN: 1944-8670
出版年: 2013
卷: 40, 期: 11 起始页码: 2779
结束页码: 2784
语种: 英语
英文关键词: dissolved methane
; distribution patterns
; freshwater lakes
; horizontal gradients
; littoral zone
; methane emissions
Scopus关键词: Dissolved methane
; Distribution patterns
; Fresh water lakes
; Horizontal gradients
; Littoral zone
; Methane emissions
; Atmospheric chemistry
; Dissolution
; Estimation
; Lakes
; Spatial distribution
; Water
; Methane
; dissolved gas
; epilimnion
; global change
; lacustrine environment
; methane
; sampling
; spatiotemporal analysis
英文摘要: Lakes have been identified as an important source of atmospheric methane. Here the spatiotemporal distribution of dissolved methane was measured in a medium-sized freshwater lake. The data reveal that littoral zones (nearshore, shallow) are the predominant source of methane. Offshore-directed gradients of dissolved methane suggest the transport of methane from the nearshore zone to the pelagic epilimnion. The distribution patterns of epilimnetic methane were highly heterogeneous, independent of the mean lake-wide methane concentration. Consequently, the diffusive flux of methane to the atmosphere strongly varies with location in the lake. A comparison of the diffusive methane flux from different offshore sampling stations indicates that single-point measurements are not necessarily sufficient to estimate lake-wide emissions to the atmosphere accurately. Thus, spatially resolved measurements of methane emissions are needed to improve the reliability of estimates of the methane that lakes contribute to the global methane budget. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879897888&doi=10.1002%2fgrl.50453&partnerID=40&md5=885922a8f416b00b82b5eefa2a8d4751
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6203
Appears in Collections: 气候减缓与适应
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作者单位: Environmental Physics, Limnological Institute, University of Konstanz, Mainaustrasse 252, D-78465 Konstanz, Germany
Recommended Citation:
Hofmann H.. Spatiotemporal distribution patterns of dissolved methane in lakes: How accurate are the current estimations of the diffusive flux path?[J]. Geophysical Research Letters,2013-01-01,40(11).