DOI: 10.1002/grl.50291
论文题名: Thermal enhancement of gas transfer velocity of CO2 in an Amazon floodplain lake revealed by eddy covariance measurements
作者: Polsenaere P. ; Deborde J. ; Detandt G. ; Vidal L.O. ; Pérez M.A.P. ; Marieu V. ; Abril G.
刊名: Geophysical Research Letters
ISSN: 0094-9095
EISSN: 1944-8826
出版年: 2013
卷: 40, 期: 9 起始页码: 1734
结束页码: 1740
语种: 英语
英文关键词: Amazon floodplain
; CO2
; Gas exchange
Scopus关键词: Amazon floodplain
; CO2
; Eddy covariance measurements
; Gas exchange
; Insolation conditions
; Quiescent period
; Sensible heat flux
; Thermal enhancement
; Banks (bodies of water)
; Floods
; Heat flux
; Lakes
; Wind effects
; Carbon dioxide
; boundary layer
; carbon dioxide
; eddy covariance
; floodplain
; gas exchange
; gas transport
; heat flux
; insolation
; parameterization
; partial pressure
; turbulent flow
; wind velocity
; Amazon River
; Brazil
英文摘要: In November 2011, the partial pressures of carbon dioxide (pCO2) in water and air in a floodplain lake of the Amazon River in Brazil were 800 ± 75 and 387 ± 8 ppmv, respectively. Turbulent CO2 fluxes from the lake measured with eddy covariance ranged from 0.05 to 2.2 μmol m-2 s-1. The corresponding gas transfer velocities k600 ranged from 1.3 to 31.6 cm h-1, averaging 12.2 ± 6.7 cm h-1. At moderate to high wind speed, k600 increased with wind speed, with values above parameterizations for other lake ecosystems. During the prevailing tropical low wind speed (below 2.7 m s -1) and high insolation conditions, unexpected high k600 values (up to 20 cm h-1) were obtained and correlated with latent heat and sensible heat fluxes. In Amazonian open lakes, owing to long quiescent periods of low wind speed but extremely high daytime insolation and heat fluxes, thermal enhancement makes time-integrated gas transfer velocities four to five times higher than those computed from classic wind parameterization. Key Points First eddy covariance measurementsGas exchange is enhancedCO2 outgassing from floodplain lakes is larger ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879109701&doi=10.1002%2fgrl.50291&partnerID=40&md5=9a481e408a2d701e2cbf509d10004779
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6359
Appears in Collections: 气候减缓与适应
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作者单位: Laboratoire Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), CNRS-UMR 5805, Université de Bordeaux, Avenue des Facultés, 33405 Talence Cedex, France
Recommended Citation:
Polsenaere P.,Deborde J.,Detandt G.,et al. Thermal enhancement of gas transfer velocity of CO2 in an Amazon floodplain lake revealed by eddy covariance measurements[J]. Geophysical Research Letters,2013-01-01,40(9).