气候变化领域集成服务门户(CCPortal): Structure of an Atmospheric River Over Australia and the Southern Ocean. Part I: Tropical and Midlatitude Water Vapor Fluxes

CCPortal

DOI	10.1029/2020JD032513
	Structure of an Atmospheric River Over Australia and the Southern Ocean. Part I: Tropical and Midlatitude Water Vapor Fluxes
	Rauber R.M.; Hu H.; Dominguez F.; Nesbitt S.W.; McFarquhar G.M.; Zaremba T.J.; Finlon J.A.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	An atmospheric river (AR) impacting Tasmania, Australia, and the Southern Ocean during the austral summer on 28–29 January 2018 during the Southern Ocean Clouds, Radiation, Aerosol Transport Experimental Study campaign is analyzed using a modeling and observational approach. Gulfstream-V dropsonde measurements and Global Precipitation Measurement radar analyses were used in conjunction with Weather Research and Forecasting model simulations with water vapor tracers to investigate the relative contributions of tropical and midlatitude moisture sources to the AR. Moisture associated with a monsoonal tropical depression became entrained into a midlatitude frontal system that extended to 60°S, reaching the associated low-pressure system 850 km off the coast of Antarctica—effectively connecting the tropics and the polar region. Tropical moisture contributed to about 50% of the precipitable water within the AR as the flow moved over the Southern Ocean near Tasmania. The tropical contribution to precipitation decreased with latitude, from >70% over Australia, to ~50% off the Australian coast, to less than 5% poleward of 55°S. The integrated vapor transport (IVT) through the core of the AR reached above 500 kg m−1 s−1 during 1200 UTC 28 January to 0600 UTC 29 January, 1.29 times the average amount of water carried by the world's largest terrestrial river, the Amazon. The high IVT strength might be attributed to the higher water vapor content associated with the warmer temperatures across Australia and the Southern Ocean in austral summer. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric river; Australia; moisture transport; seeder feeder; Southern Ocean
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/185774
作者单位	Department of Atmospheric Sciences, University of Illinois at Urbana–Champaign, Urbana and Champaign, IL, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Cooperative Institute for Mesoscale Meteorological Studies and School of Meteorology, University of Oklahoma, Norman, OK, United States; Now at Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Rauber R.M.,Hu H.,Dominguez F.,et al. Structure of an Atmospheric River Over Australia and the Southern Ocean. Part I: Tropical and Midlatitude Water Vapor Fluxes[J],2020,125(18).
APA	Rauber R.M..,Hu H..,Dominguez F..,Nesbitt S.W..,McFarquhar G.M..,...&Finlon J.A..(2020).Structure of an Atmospheric River Over Australia and the Southern Ocean. Part I: Tropical and Midlatitude Water Vapor Fluxes.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Rauber R.M.,et al."Structure of an Atmospheric River Over Australia and the Southern Ocean. Part I: Tropical and Midlatitude Water Vapor Fluxes".Journal of Geophysical Research: Atmospheres 125.18(2020).