Scopus记录号: 2-s2.0-85061106500
论文题名: Moisture transport in observations and reanalyses as a proxy for snow accumulation in East Antarctica
作者: Dufour A. ; Charrondière C. ; Zolina O.
刊名: Cryosphere
ISSN: 19940416
出版年: 2019
卷: 13, 期: 2 起始页码: 413
结束页码: 425
语种: 英语
英文摘要: Atmospheric moisture convergence on ice sheets provides an estimate of snow accumulation, which is critical to quantifying sea-level changes. In the case of East Antarctica, we computed moisture transport from 1980 to 2016 in five reanalyses and in radiosonde observations. Moisture convergence in reanalyses is more consistent than net precipitation but still ranges from 72 to 96mmyr-1 in the four most recent reanalyses, ERA-Interim, NCEP CFSR, JRA 55 and MERRA 2. The representation of long-term variability in reanalyses is also inconsistent, which justified resorting to observations. Moisture fluxes are measured on a daily basis via radiosondes launched from a network of stations surrounding East Antarctica. Observations agree with reanalyses on the major role of extreme advection events and transient eddy fluxes. Although assimilated, the observations reveal processes that reanalyses cannot model, some due to a lack of horizontal and vertical resolution, especially the oldest, NCEP DOE R2. Additionally, the observational time series are not affected by new satellite data unlike the reanalyses. We formed pan-continental estimates of convergence by aggregating anomalies from all available stations. We found statistically significant trends neither in moisture convergence nor in precipitable water. © Author(s) 2019. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122676
Appears in Collections: 气候变化事实与影响
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作者单位: IGE, Institut des Géosciences de l'Environnement, CNRS/UGA, Grenoble, France; IORAS, P. P. Shirshov Institute of Oceanology, Russian Academy of Science, Moscow, Russian Federation
Recommended Citation:
Dufour A.,Charrondière C.,Zolina O.. Moisture transport in observations and reanalyses as a proxy for snow accumulation in East Antarctica[J]. Cryosphere,2019-01-01,13(2)