气候变化领域集成服务门户(CCPortal): Modulation of tropical cyclone tracks over the western North Pacific by intra-seasonal Indo-western Pacific convection oscillation during the boreal extended summer

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DOI	10.1007/s00382-018-4264-6
	Modulation of tropical cyclone tracks over the western North Pacific by intra-seasonal Indo-western Pacific convection oscillation during the boreal extended summer
	Wang Q.; Li J.; Li Y.; Xue J.; Zhao S.; Xu Y.; Wang Y.; Zhang Y.; Dong D.; Zhang J.
发表日期	2019
ISSN	0930-7575
起始页码	913
结束页码	927
卷号	52 期号:2020-01-02
英文摘要	This study investigates the effect of the intra-seasonal Indo-western Pacific convection oscillation (IPCO) on tropical cyclone (TC) tracks over the western North Pacific (WNP) during the boreal extended summer (May−October). The number of west- and northwest-moving TC tracks is found to sharply increase over the WNP in the positive intra-seasonal IPCO phase. Recurving tracks have greater weight in the negative intra-seasonal IPCO phase. Possible physical mechanisms are further examined in terms of steering flow, energy conversion, and energy propagation. When the intra-seasonal IPCO phase is positive, the first-order moment term of perturbation potential energy (PPE 1 ) converts into perturbation kinetic energy (PKE) at lower latitudes. The pressure trough spreads farther to the east. Meanwhile, Rossby waves emanating from the convective centers of the intra-seasonal IPCO over the WNP (Wave WNP ) and EEIO (Wave EEIO ) travel into the trough region, thereby deepening the trough. These features enhance the westward and northwestward steering flow between 20°N and about 30°N, sharply increasing the number of straight west- and northwest-moving TC tracks over the WNP. When the intra-seasonal IPCO is in a negative phase, conversion from PPE 1 to PKE at lower latitudes is suppressed and the trough weakens. More PPE 1 converts to PKE in the climatological western Pacific subtropical high (WPSH) region and the WPSH is intensified. Moreover, Wave EEIO intensifies the north–south ridge of the WPSH over the southern Indian Peninsula. Meanwhile, part Wave WNP propagate northeastward. These features favor northeastward motion of TCs over the WNP. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Intra-seasonal Indo-western Pacific convection oscillation; Perturbation potential energy; Rossby wave; Tropical cyclone tracks; Western North Pacific
语种	英语
scopus关键词	climatology; oceanic convection; perturbation; potential energy; Rossby wave; storm track; summer; tropical cyclone; Pacific Ocean; Pacific Ocean (North)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146579
作者单位	College of Global Change and Earth System Sciences (GCESS), Beijing Normal University, Beijing, 100875, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Meteorological Disaster of Ministry of Education, College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Department of Atmospheric Sciences, University of Hawai‘i at Mānoa, Honolulu, HI 96822, United States; Chengdu Meteorological Bureau, Chengdu, 610072, China
推荐引用方式 GB/T 7714	Wang Q.,Li J.,Li Y.,et al. Modulation of tropical cyclone tracks over the western North Pacific by intra-seasonal Indo-western Pacific convection oscillation during the boreal extended summer[J],2019,52(2020-01-02).
APA	Wang Q..,Li J..,Li Y..,Xue J..,Zhao S..,...&Zhang J..(2019).Modulation of tropical cyclone tracks over the western North Pacific by intra-seasonal Indo-western Pacific convection oscillation during the boreal extended summer.Climate Dynamics,52(2020-01-02).
MLA	Wang Q.,et al."Modulation of tropical cyclone tracks over the western North Pacific by intra-seasonal Indo-western Pacific convection oscillation during the boreal extended summer".Climate Dynamics 52.2020-01-02(2019).