气候变化领域集成服务门户(CCPortal): Comparing Tropopause-Penetrating Convection Identifications Derived From NEXRAD and GOES Over the Contiguous United States

CCPortal

DOI	10.1029/2020JD034319
	Comparing Tropopause-Penetrating Convection Identifications Derived From NEXRAD and GOES Over the Contiguous United States
	Cooney J.W.; Bedka K.M.; Bowman K.P.; Khlopenkov K.V.; Itterly K.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:14
英文摘要	Overshooting tops (OTs) are a well-known indicator of updrafts capable of transporting air from the troposphere to the stratosphere and generating hazardous weather conditions. Satellites and radars have long been used to identify OTs, but the results have not been entirely consistent due to differences in sensor and measurement characteristics. OT detection approaches based on satellite infrared (IR) imagery have often been validated using human-expert OT identifications, but such datasets are time-consuming to compile over broad geographic regions. Despite radar limitations to detect the true physical cloud top, OTs identified within multi-radar composites can serve as a stable reference for comprehensive satellite OT analysis and detection validation. This study analyzes a large OT data set compiled from Geostationary Operational Environmental Satellites (GOES)-13/16 geostationary IR data and gridded volumetric Next-Generation Radar (NEXRAD) reflectivity to better understand radar and IR observations of OTs, quantify agreement between satellite and radar OT detections, and demonstrate how an increased spatial sampling from GOES-13 to GOES-16 impacts OT appearance and detection performance. For nearly time-matched scenes and moderate OT probability, the GOES-13 detection rate (∼60%) is ∼15% lower than GOES-16 (∼75%), which is mostly attributed to coarser spatial resolution. NEXRAD column-maximum reflectivity and tropopause-relative echo-top height as a function of GOES OT probability were quite consistent between the two satellites however, indicating that efforts to account for differing resolution were largely successful. GOES false detections are unavoidable because outflow from nearby or recently decayed OTs can be substantially colder than the tropopause and look like an OT to an automated algorithm. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	GOES; infrared brightness temperature; NEXRAD; overshooting convection; severe convection; upper troposphere and lower stratosphere
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/237121
作者单位	NASA Postdoctoral Fellowship Program at NASA Langley Research Center, Hampton, VA, United States; NASA Langley Research Center, Hampton, VA, United States; Department of Atmospheric Sciences, Texas A&M University, College Station, TX, United States; Science Systems and Applications Inc., Hampton, VA, United States
推荐引用方式 GB/T 7714	Cooney J.W.,Bedka K.M.,Bowman K.P.,et al. Comparing Tropopause-Penetrating Convection Identifications Derived From NEXRAD and GOES Over the Contiguous United States[J],2021,126(14).
APA	Cooney J.W.,Bedka K.M.,Bowman K.P.,Khlopenkov K.V.,&Itterly K..(2021).Comparing Tropopause-Penetrating Convection Identifications Derived From NEXRAD and GOES Over the Contiguous United States.Journal of Geophysical Research: Atmospheres,126(14).
MLA	Cooney J.W.,et al."Comparing Tropopause-Penetrating Convection Identifications Derived From NEXRAD and GOES Over the Contiguous United States".Journal of Geophysical Research: Atmospheres 126.14(2021).