气候变化领域集成服务门户(CCPortal): Two- And three-dimensional structures of the descent of mesospheric trace constituents after the 2013 sudden stratospheric warming elevated stratopause event

CCPortal

DOI	10.5194/acp-21-14059-2021
	Two- And three-dimensional structures of the descent of mesospheric trace constituents after the 2013 sudden stratospheric warming elevated stratopause event
	Siskind D.E.; Harvey V.L.; Sassi F.; Mccormack J.P.; Randall C.E.; Hervig M.E.; Bailey S.M.
发表日期	2021
ISSN	1680-7316
起始页码	14059
结束页码	14077
卷号	21 期号:18
英文摘要	We use the Specified Dynamics version of the Whole Atmosphere Community Climate Model Extended (SD-WACCMX) to model the descent of nitric oxide (NO) and other mesospheric tracers in the extended, elevated stratopause phase of the 2013 sudden stratospheric warming (SSW). The dynamics are specified with a high-altitude version of the Navy Global Environmental Model (NAVGEMHA). Consistent with our earlier published results, we find that using a high-altitude meteorological analysis to nudge WACCMX allows for a realistic simulation of the descent of lower-thermospheric nitric oxide down to the lower mesosphere, near 60 km. This is important because these simulations only included auroral electrons and did not consider additional sources of NO from higher-energy particles that might directly produce ionization, and hence nitric oxide, below 80-85 km. This suggests that the so-called energetic particle precipitation indirect effect (EPP-IE) can be accurately simulated, at least in years of low geomagnetic activity, such as 2013, without the need for additional NO production, provided the meteorology is accurately constrained. Despite the general success of WACCMX in bringing uppermesospheric NO down to 55-60 km, a detailed comparison of the WACCMX fields with the analyzed NAVGEMHA H2O and satellite NO and H2O data from the Solar Occultation for Ice Experiment (SOFIE) and the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS) reveals significant differences in the latitudinal and longitudinal distributions at lower altitudes. This stems from the tendency forWACCMX descent to maximize at sub-polar latitudes, and while such sub-polar descent is seen in the NAVGEM-HA analysis, it is more transient than in the WACCMX simulation. These differences are linked to differences in the transformed Eulerian mean (TEM) circulation between NAVGEM-HA and WACCMX, most likely arising from differences in how gravity wave forcing is represented. To attempt to compensate for the differing distributions of model vs. observed NO and to enable us to quantify the total amount of upper-atmospheric NO delivered to the stratopause region, we use potential vorticity and equivalent latitude coordinates. Preliminary results suggest both model and observations are generally consistent with NO totals in the range of 0.1-0.25 gigamoles (GM). © Author(s) 2021.
语种	英语
scopus关键词	aurora; gravity wave; mesosphere; nitric oxide; potential vorticity; stratosphere; trace element; warming; wave force
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/246568
作者单位	Space Science Division, Naval Research Laboratory, Washington, DC, United States; Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States; GATS Inc., Driggs, ID, United States; Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, United States; Heliophysics Division, National Aeronautics and Space Administration, Washington, DC, United States
推荐引用方式 GB/T 7714	Siskind D.E.,Harvey V.L.,Sassi F.,et al. Two- And three-dimensional structures of the descent of mesospheric trace constituents after the 2013 sudden stratospheric warming elevated stratopause event[J],2021,21(18).
APA	Siskind D.E..,Harvey V.L..,Sassi F..,Mccormack J.P..,Randall C.E..,...&Bailey S.M..(2021).Two- And three-dimensional structures of the descent of mesospheric trace constituents after the 2013 sudden stratospheric warming elevated stratopause event.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(18).
MLA	Siskind D.E.,et al."Two- And three-dimensional structures of the descent of mesospheric trace constituents after the 2013 sudden stratospheric warming elevated stratopause event".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.18(2021).