气候变化领域集成服务门户(CCPortal): The semi-annual oscillation (SAO) in the upper troposphere and lower stratosphere (UTLS)

CCPortal

DOI	10.5194/acp-22-9499-2022
	The semi-annual oscillation (SAO) in the upper troposphere and lower stratosphere (UTLS)
	Ming Shangguan; Wang, Wuke
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	9499
结束页码	9511
卷号	22 期号:14 页码:13
英文摘要	Both the scientific and operational communities are increasingly interested in subseasonal to seasonal variations of weather and climate. The semi-annual oscillation (SAO) has been studied extensively at the surface as well as in the middle atmosphere (upper stratosphere and the lower mesosphere). However, the SAO in the upper troposphere and lower stratosphere (UTLS) has been less discussed. Here we find evident SAO of temperature in the UTLS (250-175 hPa) from the subtropics to middle latitudes (22.5-42.5 degrees) using high-quality satellite measurements, reanalysis data, and model simulations. We show the mechanism of its formation by an energy budget analysis. The temperature in the Northern Hemisphere (NH) UTLS shows the first peak in February according to the dynamical heating and shows the second peak in July due to the dynamical heating and moist processes Similar to the NH, the austral winter time maximum temperature in the Southern Hemisphere (SH) is related to dynamical heating and the austral summer time maximum is related to both moisture and dynamical heating in the UTLS. Model simulations indicate that the SAO in the UTLS is partly affected by the existence of an SAO in sea surface temperatures (SSTs) in the SH mid-latitudes and weakly affected by the SAO in SSTs in the NH mid-latitudes.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000828639300001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273820
作者单位	China University of Geosciences; China University of Geosciences
推荐引用方式 GB/T 7714	Ming Shangguan,Wang, Wuke. The semi-annual oscillation (SAO) in the upper troposphere and lower stratosphere (UTLS)[J],2022,22(14):13.
APA	Ming Shangguan,&Wang, Wuke.(2022).The semi-annual oscillation (SAO) in the upper troposphere and lower stratosphere (UTLS).ATMOSPHERIC CHEMISTRY AND PHYSICS,22(14),13.
MLA	Ming Shangguan,et al."The semi-annual oscillation (SAO) in the upper troposphere and lower stratosphere (UTLS)".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.14(2022):13.