期刊
ATMOSPHERIC RESEARCH
卷 259, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.atmosres.2021.105699
关键词
Antarctic Plateau; Weather observations; Mesoscale dynamics; Cold pools; Surface air temperature
资金
- Spanish Agencia Estatal de Investigacion (AEI)
- Fondo Europeo al Desarrollo Regional (FEDER) through the MICROAIRPOLAR project [CTM2016-79741R]
- Generalitat de Catalunya through the ANTALP Research Group [2017 SGR 1102]
This study characterizes the mesoscale surface air temperature gradients around Dome F on the Antarctic Plateau by combining ERA5 reanalysis outputs and in-situ weather observations. The study found that nighttime SAT gradients are highly variable and ERA5 tends to underestimate them. Surface meso-beta eddies observed have implications for site selection for astronomical observations.
This article characterizes the mesoscale surface air temperature (SAT) gradients around the Dome F on the Antarctic Plateau combining ERA5 reanalysis outputs and in-situ weather observations. For this we took advantage of a mobile automatic weather station (M-AWS) that allowed us to record meteorological observations in interesting areas not covered by other AWS. We found that night-time SAT gradients are very variable from night to night. ERA5 does not adequately represent thermal gradients and their daily changes and tends to underestimate them. In particular, it fails to reproduce the cold pool observed by M-AWS over the depressed areas of the terrain. The performance of ERA5 over the plateau is better when observed SAT gradients are weak. Besides, we observed surface meso-beta eddies with warm cores and horizontal gradients of more than 5 degrees C 100 km(-1) simulated by ERA5 that have implications for site selection to establish new telescopes for astronomical observations. This study helps to interpret the daily performance of SAT values provided by reanalyisis on the Antarctic Plateau and complements climatological evaluations of SAT in the region. Finally, this study raises the necessity to increase in-situ weather observations, not only on the ridges of the Antarctic plateau where the majority are located, but also in the areas of depression to have a better picture of the weather and climate of the plateau.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据