DOI: 10.1002/2013GL057669
论文题名: Spatial heterogeneity and lake morphology affect diffusive greenhouse gas emission estimates of lakes
作者: Schilder J. ; Bastviken D. ; Van Hardenbroek M. ; Kankaala P. ; Rinta P. ; Stötter T. ; Heiri O.
刊名: Geophysical Research Letters
ISSN: 0094-8395
EISSN: 1944-8126
出版年: 2013
卷: 40, 期: 21 起始页码: 5752
结束页码: 5756
语种: 英语
英文关键词: carbon dioxide emission
; diffusive flux
; greenhouse gases
; lakes
; methane emission
Scopus关键词: Carbon dioxide emissions
; Diffusive flux
; Greenhouse gas fluxes
; Methane emissions
; Single-point measurement
; Spatial heterogeneity
; Spatial variability
; Wind speed models
; Carbon dioxide
; Estimation
; Global warming
; Greenhouse gases
; Methane
; Morphology
; Wind effects
; Lakes
; atmospheric pollution
; calibration
; carbon dioxide
; concentration (composition)
; emission
; estimation method
; geomorphology
; greenhouse gas
; lake
; measurement method
; methane
; numerical model
; potassium
; spatial analysis
; wind velocity
; Europe
英文摘要: Most estimates of diffusive flux (F) of methane (CH4) and carbon dioxide (CO2) from lakes are based on single-point flux chamber measurements or on piston velocity (k) modeled from wind speed and single-point measurements of surface water gas concentrations (Caq). We analyzed spatial variability of F of CH4 and CO2, as well as C aq and k in 22 European lakes during late summer. F and k were higher in the lake centers, leading to considerable bias when extrapolating single-point chamber measurements to whole-lake estimates. The ratio of our empirical k estimates to wind speed-modeled k was related to lake size and shape, suggesting a lake morphology effect on the relationship between wind speed and k. This indicates that the error inherent to established wind speed models can be reduced by determining k and Caq at multiple sites on lakes to calibrate wind speed-modeled k to the local system. Key Points Diffusive greenhouse gas flux from lakes has a distinct within-lake distribution Single-point estimates can lead to biased diffusive gas flux estimates The relationship of wind speed at 10 m with piston velocity varies within lakes ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887549184&doi=10.1002%2f2013GL057669&partnerID=40&md5=a259d013fbf1dc223b701d0a40622c47
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5659
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Institute of Plant Sciences, Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland
Recommended Citation:
Schilder J.,Bastviken D.,Van Hardenbroek M.,et al. Spatial heterogeneity and lake morphology affect diffusive greenhouse gas emission estimates of lakes[J]. Geophysical Research Letters,2013-01-01,40(21).