气候变化领域集成服务门户(CCPortal): Cloud vertical structure measurements from a ground-based cloud radar over the southeastern Tibetan Plateau

CCPortal

DOI	10.1016/j.atmosres.2021.105629
	Cloud vertical structure measurements from a ground-based cloud radar over the southeastern Tibetan Plateau
	Zhou R.; Wang G.; Zhaxi S.
发表日期	2021
ISSN	0169-8095
卷号	258
英文摘要	The southeastern Tibetan Plateau (TP) is the critical region of water vapor transport over the TP. Ground-based Ka-band cloud radar (KaCR) measurements collected at the Motuo National Climate Observatory in 2019 were used to analyze the physical properties of clouds at the front of the water vapor channel over the TP. The cloud top heights (CTHs) measured by the KaCR were verified through a comparison with observations from the Fengyun-4A (FY-4A) satellite at the same location. The KaCR-obtained CTHs were generally consistent with the FY-4A-obtained CTHs, although the KaCR slightly overestimated the CTHs of nonprecipitation clouds and underestimated the CTHs of precipitation clouds. Negative deviations between the KaCR- and FY-4A-obtained CTHs increased with rainfall rate. Cloud cover frequently occurred over Motuo, with an annual mean occurrence frequency of 65.3%. Clouds tended to form frequently at night and dissipate gradually in the daytime. Two peaks in the cloud base height (CBH) distribution were observed in Motuo, located at 0–1 km and 2–3 km, corresponding to precipitation and nonprecipitation clouds, respectively. The CTHs reached a peak at 6–7 km, which might be related to precipitation clouds. Moreover, a maximum CTH probability was observed in the midnight-early morning hours during the rainy season, while the CTH frequency peaked in the evening during the dry season. In addition, low and middle clouds were prevalent in Motuo for the period of observation in 2019. Understanding the characteristics of clouds over the TP will provide key validations of satellite measurements and promote research on cloud forces over the TP. © 2021 Elsevier B.V.
英文关键词	Cloud base height; Cloud top height; Fengyun-4A satellite; Ka-band cloud radar; Southeastern Tibetan Plateau
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236731
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Science, 46 South Street Zhongguancun, Beijing, 100081, China; Meteorological Bureau of Motuo County, Tibet, Jingfan Road, Motuo Town, Motuo County, Tibet 860700, China
推荐引用方式 GB/T 7714	Zhou R.,Wang G.,Zhaxi S.. Cloud vertical structure measurements from a ground-based cloud radar over the southeastern Tibetan Plateau[J],2021,258.
APA	Zhou R.,Wang G.,&Zhaxi S..(2021).Cloud vertical structure measurements from a ground-based cloud radar over the southeastern Tibetan Plateau.Atmospheric Research,258.
MLA	Zhou R.,et al."Cloud vertical structure measurements from a ground-based cloud radar over the southeastern Tibetan Plateau".Atmospheric Research 258(2021).