气候变化领域集成服务门户(CCPortal): Comparison of mesospheric sodium profile retrievals from OSIRIS and SCIAMACHY nightglow measurements

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DOI	10.5194/acp-22-3191-2022
	Comparison of mesospheric sodium profile retrievals from OSIRIS and SCIAMACHY nightglow measurements
	Koch, Julia; Bourassa, Adam; Lloyd, Nick; Roth, Chris; von Savigny, Christian
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	3191
结束页码	3202
卷号	22 期号:5 页码:12
英文摘要	Sodium airglow is generated when excited sodium atoms emit electromagnetic radiation while they are relaxing from an excited state into a lower energetic state. This electromagnetic radiation, the two sodium D lines at 589.0 and 589.6 nm, can usually be detected from space or from ground. Sodium nightglow occurs at times when the sun is not present and excitation of sodium atoms is a result of chemical reaction with ozone. The detection of sodium nightglow can be a means to determine the amount of sodium in the earth's mesosphere and lower thermosphere (MLT). In this study, we present time series of monthly mean sodium concentration profiles, by utilizing the large spatial and temporal coverage of satellite sodium D-line nightglow measurements. We use the OSIRIS/Odin mesospheric limb measurements to derive sodium concentration profiles and vertical column densities and compare those to measurements from SCIAMACHY/Envisat and GOMOS/Envisat. Here we show that the Na D-line limb emission rate (LER) and volume emission rate (VER) profiles calculated from the OSIRIS and SCIAMACHY measurements, although the OSIRIS LER and VER profiles are around 25 % lower, agree very well in shape and overall seasonal variation. The sodium concentration profiles also agree in shape and magnitude, although those do not show the clear semi-annual cycle which is present in the LER and VER profiles. The comparison to the GOMOS sodium vertical column densities (VCDs) shows that the OSIRIS VCDs are of the same order of magnitude although again the semi-annual cycle is not as clear. We attribute the differences in the LER, VER and sodium profiles to the differences in spatial coverage between the OSIRIS and SCIAMACHY measurements, the lower signal-to-noise ratio (SNR) of the SCIAMACHY measurements and differences in local time between the measurements of the two satellites.
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:000768713800001
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/273719
作者单位	Ernst Moritz Arndt Universitat Greifswald; University of Saskatchewan
推荐引用方式 GB/T 7714	Koch, Julia,Bourassa, Adam,Lloyd, Nick,et al. Comparison of mesospheric sodium profile retrievals from OSIRIS and SCIAMACHY nightglow measurements[J],2022,22(5):12.
APA	Koch, Julia,Bourassa, Adam,Lloyd, Nick,Roth, Chris,&von Savigny, Christian.(2022).Comparison of mesospheric sodium profile retrievals from OSIRIS and SCIAMACHY nightglow measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(5),12.
MLA	Koch, Julia,et al."Comparison of mesospheric sodium profile retrievals from OSIRIS and SCIAMACHY nightglow measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.5(2022):12.