An Experimental Investigation of Kinetic Fractionation of Open-Water Evaporation Over a Large Lake
Xiao, W; Lee, XH; Hu, YB; Liu, SD; Wang, W; Wen, XF; Werner, M; Xie, CY
2017
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
Volume122Issue:21Pages:11651-11663
AbstractThe oxygen isotopes of water ((H2O)-O-18 and (H2O)-O-16) are tracers widely used for the investigation of Earth science problems. The tracer applications are based on the premise that the O-18/O-16 ratio of open-water evaporation (delta O-18(E)) can be calculated from environmental conditions. A long-standing issue concerns the role of kinetic fractionation, or diffusion transport, in the evaporation process. Here we deployed an optical instrument at a large lake (area 2,400 km(2)) to make in situ measurement of O-18 and D of atmospheric vapor, then determined delta O-18 and delta D of open-water evaporation using the gradient-diffusion method. Our results show a much weaker kinetic effect than suggested by the kinetic factor epsilon(k) adopted in some previous studies of lake hydrology (14.2). By incorporating into the (H2O)-O-18 isotopic mass balance of the lake a lower epsilon(k) value (about 6.2) used for ocean evaporation in global climate models, we obtain an annual lake evaporation rate that agrees with an independent eddy-covariance observation, but the rate is 72% higher than if the commonly used lake epsilon(k) value of 14.2 is applied. The applicability of this results to small lakes is uncertain and in need of field-based assessment.
SubtypeJournal
Subject AreaMeteorology & Atmospheric Sciences
WOS Subject ExtendedMeteorology & Atmospheric Sciences
WOS KeywordISOTOPE MASS-BALANCE ; GREAT-LAKES ; DEUTERIUM EXCESS ; STABLE-ISOTOPES ; IN-SITU ; VAPOR ; PRECIPITATION ; FLUXES ; EXCHANGE ; RATIOS
Indexed BySCI
Language英语
WOS IDWOS:000417195500041
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/43974
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Xiao, W,Lee, XH,Hu, YB,et al. An Experimental Investigation of Kinetic Fractionation of Open-Water Evaporation Over a Large Lake[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(21):11651-11663.
APA Xiao, W.,Lee, XH.,Hu, YB.,Liu, SD.,Wang, W.,...&Xie, CY.(2017).An Experimental Investigation of Kinetic Fractionation of Open-Water Evaporation Over a Large Lake.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(21),11651-11663.
MLA Xiao, W,et al."An Experimental Investigation of Kinetic Fractionation of Open-Water Evaporation Over a Large Lake".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.21(2017):11651-11663.
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