气候变化领域集成服务门户(CCPortal): Large-scale environmental influences on tropical cyclone formation processes and development time

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DOI	10.1175/JCLI-D-19-0709.1
	Large-scale environmental influences on tropical cyclone formation processes and development time
	Teng H.-F.; Done J.M.; Lee C.-S.; Hsu H.-H.; Kuo Y.-H.
发表日期	2020
ISSN	0894-8755
起始页码	9763
结束页码	9782
卷号	33 期号:22
英文摘要	The development of tropical cloud clusters (TCCs) to tropical cyclones (TCs) is the process of TC formation. This study identifies five main environmental transitions for the development of TCCs to TCs in the western North Pacific by using a cluster analysis method. Of these, three transitions indicate TCCs that develop in monsoon environments and two in easterly environments. Their numbers, distributions, and interannual variability differ. On average, the development time, defined as the period from the TCC forming to it developing into a TC, for TCCs that develop in easterly environments is shorter than that in monsoon environments. For the development of TCC to TC in easterly environments, TCCs have fewer embedded mesoscale convective systems (MCSs), which are located closer to the TCC center. Moreover, there is a stronger inward short-term (less than 10 days) angular momentum flux (AMF) at middle levels (800–500 hPa) before TCC formation. Conversely, in monsoon environments, TCCs have more MCSs, which are located farther from the TCC center. A stronger inward short-term AMF at low levels (1000–850 hPa) is observed before TCC formation and develops upward during the development of TCC to TC. The characteristics of MCS and AMF are significantly correlated with the development time of TCC to TC. In summary, large-scale easterly and monsoon environments cause TCCs to have different MCS and AMF characteristics, leading to higher efficiency for TCCs developing into TCs in easterly environments compared to monsoon environments. © 2020 American Meteorological Society.
英文关键词	Atmospheric thermodynamics; Cluster analysis; Embedded systems; Hurricanes; Tropics; Angular momentum flux; Cluster analysis methods; Environmental influences; Formation process; Higher efficiency; Interannual variability; Mesoscale Convective System; Western North Pacific; Storms; angular momentum; atmospheric convection; cluster analysis; easterly wave; El Nino-Southern Oscillation; mesoscale meteorology; monsoon; statistical analysis; tropical cyclone; Pacific Ocean; Pacific Ocean (Northwest)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171043
作者单位	National Center for Atmospheric Research, Boulder, CO, United States; Center for Weather Climate and Disaster Research, Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan; Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan; National Center for Atmospheric Research, University Corporation for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Teng H.-F.,Done J.M.,Lee C.-S.,et al. Large-scale environmental influences on tropical cyclone formation processes and development time[J],2020,33(22).
APA	Teng H.-F.,Done J.M.,Lee C.-S.,Hsu H.-H.,&Kuo Y.-H..(2020).Large-scale environmental influences on tropical cyclone formation processes and development time.Journal of Climate,33(22).
MLA	Teng H.-F.,et al."Large-scale environmental influences on tropical cyclone formation processes and development time".Journal of Climate 33.22(2020).