气候变化领域集成服务门户(CCPortal): Climatology and Detection of Overshooting Convection From 4 Years of GPM Precipitation Radar and Passive Microwave Observations

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DOI	10.1029/2019JD032003
	Climatology and Detection of Overshooting Convection From 4 Years of GPM Precipitation Radar and Passive Microwave Observations
	Liu N.; Liu C.; Hayden L.
发表日期	2020
ISSN	2169897X
卷号	125 期号:7
英文摘要	A 4-year Global Precipitation Measurement (GPM) Precipitation Feature (PF) data set is used to quantify the frequency and global distribution of overshooting convection. In this study, overshooting convection is defined as PFs with maximum 20 dBZ echo top height (MAXHT20) greater than the height of the lapse rate tropopause, derived from ERA-Interim reanalysis data. The geographical distribution of overshooting convection exhibits a strong preference for specific land regions, such as over the central United States, Argentina, Central Africa, and Colombia. Larger areas and greater occurrence of 20 dBZ radar reflectivity at the tropopause are found in northern middle to high latitudes than in the tropics. The occurrence of 20 dBZ radar reflectivity reaching above the level of 380 K potential temperature (Z380K) in middle and high latitudes is found to be comparable to that in the tropics. Furthermore, a methodology is developed to detect overshooting convection using the GPM Microwave Imager measured brightness temperature at 183.31 ± 3 and 183.31 ± 7 GHz, and Polarization Corrected Temperature at 89 GHz. The geographical distribution of overshooting convection can be closely reproduced using the combinations of these brightness temperatures with an average Heidke skill score of 0.4 and probability of 0.38. This shows the possibility of identifying overshooting convection from microwave observations at high-frequency channels near the water vapor absorption line centered at 183.31 GHz from other satellite missions. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	overshooting; passive microwave; precipitation radar; troposphere-stratosphere exchange
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/186073
作者单位	Department of Physical and Environmental Sciences, Texas A&M University at Corpus Christi, Corpus Christi, TX, United States
推荐引用方式 GB/T 7714	Liu N.,Liu C.,Hayden L.. Climatology and Detection of Overshooting Convection From 4 Years of GPM Precipitation Radar and Passive Microwave Observations[J],2020,125(7).
APA	Liu N.,Liu C.,&Hayden L..(2020).Climatology and Detection of Overshooting Convection From 4 Years of GPM Precipitation Radar and Passive Microwave Observations.Journal of Geophysical Research: Atmospheres,125(7).
MLA	Liu N.,et al."Climatology and Detection of Overshooting Convection From 4 Years of GPM Precipitation Radar and Passive Microwave Observations".Journal of Geophysical Research: Atmospheres 125.7(2020).