气候变化领域集成服务门户(CCPortal): Long-Term Variability and Tendencies in Migrating Diurnal Tide From WACCM6 Simulations During 1850

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DOI	10.1029/2020JD033644
	Long-Term Variability and Tendencies in Migrating Diurnal Tide From WACCM6 Simulations During 1850–2014
	Ramesh K.; Smith A.K.; Garcia R.R.; Marsh D.R.; Sridharan S.; Kishore Kumar K.
发表日期	2020
ISSN	2169897X
卷号	125 期号:23
英文摘要	Long-term variability and tendencies in migrating diurnal tide (DW1) are investigated for the first time using a three-member ensemble of historical simulations by NCAR's Whole Atmosphere Community Climate Model, latest Version 6 (WACCM6) for 1850–2014 (165 years). The model reproduces the climatological features of the tide in temperature (T), zonal wind (U), and meridional wind (V). The amplitudes peak in the upper mesosphere and lower thermosphere (above ~0.001 hPa) at the equator for T (~10 K) and over 20–30°N and S latitudes for U (~15 m/s) and V (~25 m/s). The contributions of solar cycle (SC), quasi biennial oscillation (QBO) at 10 and 30 hPa, El Niño–Southern Oscillation (ENSO), ozone depleting substances (ODS), carbon dioxide (CO2), and stratospheric sulfate aerosols (volcanic eruptions) to change in annual mean amplitudes are analyzed using multiple linear regression. The tidal amplitudes in three components show a long-term increase in the upper stratosphere (0.95–10.7 hPa) and the upper mesosphere (0.0001–0.01 hPa), predominantly due to increasing CO2 with a smaller contribution from the trend in ENSO. Interestingly, the global mean tidal amplitude in T decreases sharply after 1950–1960 until 1995 and then increases in association with changes in ODSs. The seasonal differences in tidal responses to the above indices can be as large as the overall signals. All the responses are stronger in the upper mesosphere; however, there is also a pronounced negative response of temperature tide to ODSs over middle to high latitudes around the stratopause (~1 hPa) during all seasons. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric tides; lower stratosphere; mesosphere; trends
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/185599
作者单位	Atmospheric Chemistry Observations and Modeling (ACOM) Laboratory, National Center for Atmospheric Research (NCAR), Boulder, CO, United States; University Corporation for Atmospheric Research (UCAR), Boulder, CO, United States; University of Leeds, Leeds, United Kingdom; National Atmospheric Research Laboratory (NARL), Gadanki, A.P., India; Space Physics Laboratory, Vikram Sarabhai Space Centre (VSSC), Trivandrum, India
推荐引用方式 GB/T 7714	Ramesh K.,Smith A.K.,Garcia R.R.,等. Long-Term Variability and Tendencies in Migrating Diurnal Tide From WACCM6 Simulations During 1850–2014[J],2020,125(23).
APA	Ramesh K.,Smith A.K.,Garcia R.R.,Marsh D.R.,Sridharan S.,&Kishore Kumar K..(2020).Long-Term Variability and Tendencies in Migrating Diurnal Tide From WACCM6 Simulations During 1850–2014.Journal of Geophysical Research: Atmospheres,125(23).
MLA	Ramesh K.,et al."Long-Term Variability and Tendencies in Migrating Diurnal Tide From WACCM6 Simulations During 1850–2014".Journal of Geophysical Research: Atmospheres 125.23(2020).