气候变化领域集成服务门户(CCPortal): A global view on stratospheric ice clouds: assessment o processes related to their occurrence based on satellite observations

CCPortal

DOI	10.5194/acp-22-6677-2022
	A global view on stratospheric ice clouds: assessment o processes related to their occurrence based on satellite observations
	Zou, Ling; Griessbach, Sabine; Hoffmann, Lars; Spang, Reinhold
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	6677
结束页码	6702
卷号	22 期号:10 页码:26
英文摘要	Ice clouds play an important role in regulating water vapor and influencing the radiative budget in the atmosphere. This study investigates stratospheric ice clouds (SICs) in the latitude range between +/- 60 degrees based on the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO). As polar stratospheric clouds include other particles, they are not discussed in this work. Tropopause temperature, double tropopauses, clouds in the upper troposphere and lower stratosphere (UTLS), gravity waves, and stratospheric aerosols are analyzed to investigate their relationships with the occurrence of and variability in SICs in the tropics and at midlatitudes. We found that SICs with cloud-top heights of 250 m above the first lapse rate tropopause are mainly detected in the tropics. Monthly time series of SICs from 2007 to 2019 show that high occurrence frequencies of SICs follow the Intertropical Convergence Zone (ITCZ) over time in the tropics and that SICs vary interannually at different latitudes. Results show that SICs associated with double tropopauses, which are related to poleward isentropic transport, are mostly found at midlatitudes. More than 80 % of the SICs around 30 degrees N/S are associated with double tropopauses. Correlation coefficients of SICs and all the other abovementioned processes confirm that the occurrence of and variability in SICs are mainly associated with the tropopause temperature in the tropics and at midlatitudes. UTLS clouds, which are retrieved from the Atmospheric Infrared Sounder (AIRS) and used as a proxy for deep convection in the tropics and high-altitude ice cloud sources at midlatitudes, have the highest correlations with SICs in the monsoon regions and the central United States. Gravity waves are mostly related to SICs at midlatitudes, especially over Patagonia and the Drake Passage. However, the second-highest correlation coefficients show that the cold tropopause temperature, the occurrence of double tropopauses, high stratospheric aerosol loading, frequent UTLS clouds, and gravity waves are highly correlated with the SICs locally. The long-term anomaly analyses show that interannual anomalies of SICs are correlated with the tropopause temperature and stratospheric aerosols instead of the UTLS clouds and gravity waves. The overlapping and similar correlation coefficients between SICs and all processes mentioned above indicate strong associations between those processes themselves. Due to their high inherent correlations, it is challenging to disentangle and evaluate their contributions to the occurrence of SICs on a global scale. However, the correlation coefficient analyses between SICs and all abovementioned processes (tropopause temperature, double tropopauses, clouds in the upper troposphere and lower stratosphere (UTLS), gravity waves, and stratospheric aerosols) in this study help us better understand the sources of SICs on a global scale.
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:000798865200001
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/273617
作者单位	Helmholtz Association; Research Center Julich; Helmholtz Association; Research Center Julich
推荐引用方式 GB/T 7714	Zou, Ling,Griessbach, Sabine,Hoffmann, Lars,et al. A global view on stratospheric ice clouds: assessment o processes related to their occurrence based on satellite observations[J],2022,22(10):26.
APA	Zou, Ling,Griessbach, Sabine,Hoffmann, Lars,&Spang, Reinhold.(2022).A global view on stratospheric ice clouds: assessment o processes related to their occurrence based on satellite observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(10),26.
MLA	Zou, Ling,et al."A global view on stratospheric ice clouds: assessment o processes related to their occurrence based on satellite observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.10(2022):26.