气候变化领域集成服务门户(CCPortal): A Comparison of AMPS Forecasts Near the Ross Sea Polynya With Controlled Meteorological Balloon Observations

CCPortal

DOI	10.1029/2019JD030591
	A Comparison of AMPS Forecasts Near the Ross Sea Polynya With Controlled Meteorological Balloon Observations
	Dale E.R.; Katurji M.; McDonald A.J.; Voss P.; Rack W.; Seto D.
发表日期	2020
ISSN	2169897X
卷号	125 期号:20
英文摘要	This study presents atmospheric boundary layer observations made over the Ross Sea using a long-duration Controlled Meteorological (CMET) balloon and a comparison with Antarctic Mesoscale prediction System (AMPS) forecasts. The CMET balloon was launched on 22 November 2017 at 1230 UTC; this flight performed 31 repeated soundings of the atmospheric boundary layer over a period of 70 hr. During the flight the balloon made close passes of the open Terra Nova Bay and Ross Sea polynyas. We use the AMPS forecast during the flight to understand the influence of the polynya on the air sampled by the CMET balloon. Balloon observations of temperature, humidity, and wind velocity generally agree with AMPS forecasts, with the largest disparities in the wind direction field during periods of light wind and when the path of the balloon was near complex topography. To understand the thermodynamic interaction between these polynyas and the atmospheric volume sampled by the balloon, a Lagrangian trajectory model forced by AMPS winds was used to calculate the total and partial derivatives of potential temperature as well as the total water mixing ratio. This allowed us to assess the thermodynamic profile of the overlying atmospheric boundary layer. Based on analysis of the AMPS forecast, we were able to identify a region of warming air with an area of 20,000 km2, centered over the Ross Sea Polynya which was providing a strong heat source at the time of the balloon flight. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	AMPS forecast; long-duration balloon; polar meteorology; Ross Sea
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/185703
作者单位	School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand; Gateway Antarctica, University of Canterbury, Christchurch, New Zealand; Center for Atmospheric Research, University of Canterbury, Christchurch, New Zealand; Smith College, Picker Engineering Program, Northampton, MA, United States
推荐引用方式 GB/T 7714	Dale E.R.,Katurji M.,McDonald A.J.,et al. A Comparison of AMPS Forecasts Near the Ross Sea Polynya With Controlled Meteorological Balloon Observations[J],2020,125(20).
APA	Dale E.R.,Katurji M.,McDonald A.J.,Voss P.,Rack W.,&Seto D..(2020).A Comparison of AMPS Forecasts Near the Ross Sea Polynya With Controlled Meteorological Balloon Observations.Journal of Geophysical Research: Atmospheres,125(20).
MLA	Dale E.R.,et al."A Comparison of AMPS Forecasts Near the Ross Sea Polynya With Controlled Meteorological Balloon Observations".Journal of Geophysical Research: Atmospheres 125.20(2020).