气候变化领域集成服务门户(CCPortal): A Global Climatology of Tropopause Folds in CAMS and MERRA-2 Reanalyses

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DOI	10.1029/2020JD034115
	A Global Climatology of Tropopause Folds in CAMS and MERRA-2 Reanalyses
	Akritidis D.; Pozzer A.; Flemming J.; Inness A.; Zanis P.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	Tropopause folds are the main mechanism underlying stratosphere-to-troposphere transport and influence tropospheric composition and weather systems by triggering convection. Here, we present the global climatology of tropopause folds in Copernicus Atmosphere Monitoring Service (CAMS) and Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2) reanalysis of atmospheric composition products for the time period from 2003 to 2018. We applied a 3-D labeling algorithm in CAMS and MERRA-2 reanalysis data to detect tropopause folding events. In constructing their climatologies, we show that the bulk of the folds are vertically shallow and are mainly found at the subtropical zones in the vicinity of the jet streams, while deeper folds also occur over the storm tracks, consistent with previous studies. The spatiotemporal characteristics of fold climatology are captured in a similar manner in CAMS and MERRA-2, with MERRA-2 capturing slightly higher frequencies during all seasons. In quantitative terms, there is a good agreement between CAMS and MERRA-2 fold frequencies with spatiotemporal R2 values of ∼0.9 for DJF, MAM, and JJA, and 0.75 for SON. The two reanalysis products are in close agreement regarding the intra- and interannual variability in fold frequency, with temporal correlation scores higher than 0.7 over the subtropical bands where the majority of folds are found. The agreement between the two reanalyses is lower in the Southern Hemisphere compared to the Northern Hemisphere. Thus, the global climatology of tropopause folds in both CAMS and MERRA-2 reanalyses are similar to those of previous studies. © 2021. The Authors.
英文关键词	CAMS reanalysis; MERRA-2 reanalysis; tropopause folds
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/185288
作者单位	Department of Meteorology and Climatology, School of Geology, Aristotle University of Thessaloniki, Thessaloniki, Greece; Max Planck Institute for Chemistry, Mainz, Germany; European Centre for Medium-Range Weather Forecasts (ECMWF), Reading, United Kingdom
推荐引用方式 GB/T 7714	Akritidis D.,Pozzer A.,Flemming J.,et al. A Global Climatology of Tropopause Folds in CAMS and MERRA-2 Reanalyses[J],2021,126(8).
APA	Akritidis D.,Pozzer A.,Flemming J.,Inness A.,&Zanis P..(2021).A Global Climatology of Tropopause Folds in CAMS and MERRA-2 Reanalyses.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Akritidis D.,et al."A Global Climatology of Tropopause Folds in CAMS and MERRA-2 Reanalyses".Journal of Geophysical Research: Atmospheres 126.8(2021).