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DOI | 10.5194/acp-17-691-2017 |
Atmospheric moisture supersaturation in the near-surface atmosphere at Dome C, Antarctic Plateau | |
Genthon, Christophe1; Piard, Luc1; Vignon, Etienne1; Madeleine, Jean-Baptiste2,3; Casado, Mathieu4; Gallee, Hubert1 | |
2017-01-13 | |
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:1 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | Supersaturation often occurs at the top of the troposphere where cirrus clouds form, but is comparatively unusual near the surface where the air is generally warmer and laden with liquid and/or ice condensation nuclei. One exception is the surface of the high Antarctic Plateau. One year of atmospheric moisture measurement at the surface of Dome C on the East Antarctic Plateau is presented. The measurements are obtained using commercial hygrometry sensors modified to allow air sampling without affecting the moisture content, even in the case of supersaturation. Supersaturation is found to be very frequent. Common unadapted hygrometry sensors generally fail to report supersaturation, and most reports of atmospheric moisture on the Antarctic Plateau are thus likely biased low. The measurements are compared with results from two models implementing cold microphysics parameterizations: the European Center for Medium-range Weather Forecasts through its operational analyses, and the Model Atmospherique Regional. As in the observations, supersaturation is frequent in the models but the statistical distribution differs both between models and observations and between the two models, leaving much room for model improvement. This is unlikely to strongly affect estimations of surface sublimation because supersaturation is more frequent as temperature is lower, and moisture quantities and thus water fluxes are small anyway. Ignoring supersaturation may be a more serious issue when considering water isotopes, a tracer of phase change and temperature, largely used to reconstruct past climates and environments from ice cores. Because observations are easier in the surface atmosphere, longer and more continuous in situ observation series of atmospheric supersaturation can be obtained than higher in the atmosphere to test parameterizations of cold microphysics, such as those used in the formation of high-altitude cirrus clouds in meteorological and climate models. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393892700004 |
WOS关键词 | BOUNDARY-LAYER ; VISUAL OBSERVATIONS ; ENERGY BALANCE ; SNOW ; SIMULATION ; SEA ; PRECIPITATION ; HALLEY ; 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/22802 |
专题 | 地球科学 |
作者单位 | 1.Univ Grenoble Alpes, CNRS, IRD, IGE, F-38000 Grenoble, France; 2.UPMC Univ Paris 06, Sorbonne Univ, UMR 8539, Lab Meteorol Dynam IPSL, F-75005 Paris, France; 3.CNRS, UMR 8539, Lab Meteorol Dynam IPSL, F-75005 Paris, France; 4.CEA CNRS UVSQ U Paris Saclay, LSCE IPSL, Gif Sur Yvette, France |
推荐引用方式 GB/T 7714 | Genthon, Christophe,Piard, Luc,Vignon, Etienne,et al. Atmospheric moisture supersaturation in the near-surface atmosphere at Dome C, Antarctic Plateau[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(1). |
APA | Genthon, Christophe,Piard, Luc,Vignon, Etienne,Madeleine, Jean-Baptiste,Casado, Mathieu,&Gallee, Hubert.(2017).Atmospheric moisture supersaturation in the near-surface atmosphere at Dome C, Antarctic Plateau.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(1). |
MLA | Genthon, Christophe,et al."Atmospheric moisture supersaturation in the near-surface atmosphere at Dome C, Antarctic Plateau".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.1(2017). |
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