Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-1207-2017 |
The influence of snow sublimation and meltwater evaporation on delta D of water vapor in the atmospheric boundary layer of central Europe | |
Christner, Emanuel1,2; Kohler, Martin1; Schneider, Matthias2 | |
2017-01-25 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Post-depositional fractionation of stable water isotopes due to fractionating surface evaporation introduces uncertainty to various isotope applications such as the reconstruction of paleotemperatures, paleoaltimetry, and the investigation of groundwater formation. In this study, we investigate isotope fractionation at snow-covered moisture sources by combining 17 months of observations of isotope concentration ratios [(HDO)-O-16]/[(H2O)-O-16] in low-level water vapor in central Europe with a new Lagrangian isotope model. The isotope model is capable of reproducing variations of the observed isotope ratios with a correlation coefficient R of 0.82. Observations from 38 days were associated with cold snaps and moisture uptake in snow-covered regions. Deviations between modeled and measured isotope ratios during the cold snaps were related to differences in skin temperatures (T-skin). Analysis of T-skin provided by the Global Data Assimilation System (GDAS) of the NCEP implies the existence of two regimes of T-skin with different types of isotope fractionation during evaporation: a cold regime with T-skin < T-subl,T-max = -7.7 degrees C, which is dominated by non-fractionating sublimation of snow, and a warmer regime with T-subl,T-max < T-skin < 0 degrees C, which is dominated by fractionating evaporation of meltwater. Based on a sensitivity study, we assess an uncertainty range of the determined T-subl,T-max of -11.9 to -2.9 degrees C. The existence of the two fractionation regimes has important implications for the interpretation of isotope records from snow-covered regions as well as for a more realistic modeling of isotope fractionation at snow-covered moisture sources. For these reasons, more detailed experimental studies at snow-covered sites are needed to better constrain the T-subl,T-max and to further investigate isotope fractionation in the two regimes. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394599300004 |
WOS关键词 | STABLE-ISOTOPE COMPOSITION ; DRONNING-MAUD-LAND ; DEUTERIUM EXCESS ; AUGUST 2002 ; PRECIPITATION ; OXYGEN ; O-18 ; FRACTIONATION ; SYSTEM ; MODEL |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30735 |
专题 | 地球科学 |
作者单位 | 1.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Dept Troposphere IMK TRO, D-76021 Karlsruhe, Germany; 2.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Dept Atmospher Trace Gases & Remote Sensing IMK A, D-76021 Karlsruhe, Germany |
推荐引用方式 GB/T 7714 | Christner, Emanuel,Kohler, Martin,Schneider, Matthias. The influence of snow sublimation and meltwater evaporation on delta D of water vapor in the atmospheric boundary layer of central Europe[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(2). |
APA | Christner, Emanuel,Kohler, Martin,&Schneider, Matthias.(2017).The influence of snow sublimation and meltwater evaporation on delta D of water vapor in the atmospheric boundary layer of central Europe.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(2). |
MLA | Christner, Emanuel,et al."The influence of snow sublimation and meltwater evaporation on delta D of water vapor in the atmospheric boundary layer of central Europe".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.2(2017). |
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