globalchange  > 气候变化事实与影响
Scopus记录号: 2-s2.0-85047434502
论文题名:
Modulation of tropical cyclone tracks over the western North Pacific by intra-seasonal Indo-western Pacific convection oscillation during the boreal extended summer
作者: Wang Q.; Li J.; Li Y.; Xue J.; Zhao S.; Xu Y.; Wang Y.; Zhang Y.; Dong D.; Zhang J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
卷: 52, 期:2019-01-02
起始页码: 913
结束页码: 927
语种: 英语
英文关键词: Intra-seasonal Indo-western Pacific convection oscillation ; Perturbation potential energy ; Rossby wave ; Tropical cyclone tracks ; Western North Pacific
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.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122422
Appears in Collections:气候变化事实与影响

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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

Recommended Citation:
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]. Climate Dynamics,2019-01-01,52(2019-01-02)
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