气候变化领域集成服务门户(CCPortal): The Impact of Föhn Conditions Across the Antarctic Peninsula on Local Meteorology Based on AWS Measurements

CCPortal

DOI	10.1029/2020JD033748
	The Impact of Föhn Conditions Across the Antarctic Peninsula on Local Meteorology Based on AWS Measurements
	Kirchgaessner A.; King J.C.; Anderson P.S.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	Föhn winds are warm, strong, downslope winds on the lee side of mountains, which can last from several hours to a few days. Recently Föhn conditions over the ice shelves on the eastern side of the Antarctic Peninsula (AP) mountains have attracted particular interest in the polar science community. Here, on the Larsen ice shelves (LIS) they provide atmospheric conditions for significant warming over the ice shelf which are thought to have clearly contributed to the collapse of Larsen A and B ice shelves in 1995 and 2002, respectively. We examine the representation of Föhn conditions as observed by measurements at an Automatic Weather Station (AWS) located on Cole Peninsula (CP) on the east of the AP mountain range in 2011. We introduce criteria to identify Föhn conditions and analyze the meteorological conditions at the AWS location with regard to the influence of Föhn overall, and on a seasonal and monthly basis. We consult two cases to highlight the seasonally different effects Föhn can have. We also compare our findings with data obtained in other studies, e.g., an AWS in a comparable location at Flask Glacier (FG). Measurements obtained at a crest AWS on the Avery Plateau (AV), and the analysis of conditions upstream using the Froude number help to put observations at CP into a wider context. Most importantly our data show that Föhn conditions can raise the air temperature to above freezing, and thus trigger melt/sublimation even in winter. © 2021. The Authors.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185488
作者单位	Atmosphere, Ice and Climate, British Antarctic Survey, Cambridge, United Kingdom; Marine Technology, Scottish Association for Marine Science, Oban, United Kingdom
推荐引用方式 GB/T 7714	Kirchgaessner A.,King J.C.,Anderson P.S.. The Impact of Föhn Conditions Across the Antarctic Peninsula on Local Meteorology Based on AWS Measurements[J],2021,126(4).
APA	Kirchgaessner A.,King J.C.,&Anderson P.S..(2021).The Impact of Föhn Conditions Across the Antarctic Peninsula on Local Meteorology Based on AWS Measurements.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Kirchgaessner A.,et al."The Impact of Föhn Conditions Across the Antarctic Peninsula on Local Meteorology Based on AWS Measurements".Journal of Geophysical Research: Atmospheres 126.4(2021).