气候变化领域集成服务门户(CCPortal): Tracking the influence of cloud condensation nuclei on summer diurnal precipitating systems over complex topography in Taiwan

CCPortal

DOI	10.5194/acp-21-16709-2021
	Tracking the influence of cloud condensation nuclei on summer diurnal precipitating systems over complex topography in Taiwan
	Chang Y.-H.; Chen W.-T.; Wu C.-M.; Moseley C.; Wu C.-C.
发表日期	2021
ISSN	1680-7316
起始页码	16709
结束页码	16725
卷号	21 期号:22
英文摘要	This study focuses on how aerosols, serving as cloud condensation nuclei (CCN), affect the properties of diurnal precipitation under the weak synoptic weather regime over complex topography, which is a common summertime environmental regime in Taiwan. Semi-realistic large-eddy simulations (LESs) were carried out using TaiwanVVM and driven by idealized observational soundings. We perform object-based tracking analyses, which diagnose both the spatial and temporal connectivity of convective systems, aiming to reduce the variability in convection and align the aerosol effects on the mature stage of the convective life cycle. In the hotspot areas of strong orographic locking processes, the precipitation initiation is postponed significantly when the CCN concentration is increased from the clean scenario to the normal scenario, which prolongs the development of local circulation and convection. For this organized regime, the occurrence of the tracked extreme diurnal precipitating systems is notably enhanced. Also, the 99th percentile of the maximum rain rate, cloud depth, and in-cloud vertical velocity during the lifetime of the diurnal precipitating systems increases by 9.4%, 4.4%, and 1.3%. This study demonstrates that the design of semi-realistic LESs, as well as the object-based tracking analyses, is useful to investigate the responses of orographically driven diurnal convective systems to ambient conditions. ©
语种	英语
scopus关键词	aerosol; cloud condensation nucleus; convective system; diurnal variation; large eddy simulation; precipitation (climatology); summer; synoptic meteorology; topography; tracking; Taiwan
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/246440
作者单位	Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan; Meteorology Division, National Science and Technology Center for Disaster Reduction, New Taipei City, Taiwan
推荐引用方式 GB/T 7714	Chang Y.-H.,Chen W.-T.,Wu C.-M.,et al. Tracking the influence of cloud condensation nuclei on summer diurnal precipitating systems over complex topography in Taiwan[J],2021,21(22).
APA	Chang Y.-H.,Chen W.-T.,Wu C.-M.,Moseley C.,&Wu C.-C..(2021).Tracking the influence of cloud condensation nuclei on summer diurnal precipitating systems over complex topography in Taiwan.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(22).
MLA	Chang Y.-H.,et al."Tracking the influence of cloud condensation nuclei on summer diurnal precipitating systems over complex topography in Taiwan".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.22(2021).