IMPACTS OF TWO TROPICAL CYCLONES EXPERIENCING EXTRATROPICAL TRANSITION DURING NORTHWARD PROGRESSIONON THE RAINFALL OF LIAODONG PENINSULA

LIANG Jun; CHEN Lian-shou; LI Ying; ZHU Jing

Abstract:

Both of Typhoon Winnie (9711) and Matsa (0509) underwent an extratropical transition (ET) process when they moved northward after landfall and affected Liaodong Peninsula. However, Matsa produced half as much rainfall as Winnie, although it struck Liaodong Peninsula directly while Winnie passed through the Bohai Sea. The relations between the ET processes and the precipitation over Liaodong Peninsula are examined. The result shows that the precipitation difference between Winnie and Matsa was closely related to the interactions between the westerly systems and typhoons during their ET processes. Winnie was captured by the upper westerly trough and then coupled with it when moving to the mid-latitudes, and the positive anomaly of moist potential vorticity (MPV) was transported downward from the upper troposphere over the remnant circulation of the tropical cyclone (TC). It was favorable to the interaction between tropical warm and wet air and westerly cold air, causing convective cloud clusters to form and develop. The rain belt composed of several meso-β cloud clusters over the Liaodong Peninsula, resulting in heavy rainfall. On the other hand, Matsa did not couple with any upper trough during its ET process and the positive anomaly of MPV in the upper troposphere and its downward transfer were weak. Only one meso-β cloud cluster occurred in Matsa’s rain belt during its ET process that tended to lessen rainfall over Liaodong Peninsula.

Get Citation+

LIANG Jun, CHEN Lian-shou, LI Ying, et al. IMPACTS OF TWO TROPICAL CYCLONES EXPERIENCING EXTRATROPICAL TRANSITION DURING NORTHWARD PROGRESSIONON THE RAINFALL OF LIAODONG PENINSULA [J]. Journal of Tropical Meteorology, 2009, (1): 49-53.

Export:

Article Metrics

IMPACTS OF TWO TROPICAL CYCLONES EXPERIENCING EXTRATROPICAL TRANSITION DURING NORTHWARD PROGRESSIONON THE RAINFALL OF LIAODONG PENINSULA

Dalian Meteorological Observatory

Chinese Academy of Meteorological Sciences/LaSW

Abstract: Both of Typhoon Winnie (9711) and Matsa (0509) underwent an extratropical transition (ET) process when they moved northward after landfall and affected Liaodong Peninsula. However, Matsa produced half as much rainfall as Winnie, although it struck Liaodong Peninsula directly while Winnie passed through the Bohai Sea. The relations between the ET processes and the precipitation over Liaodong Peninsula are examined. The result shows that the precipitation difference between Winnie and Matsa was closely related to the interactions between the westerly systems and typhoons during their ET processes. Winnie was captured by the upper westerly trough and then coupled with it when moving to the mid-latitudes, and the positive anomaly of moist potential vorticity (MPV) was transported downward from the upper troposphere over the remnant circulation of the tropical cyclone (TC). It was favorable to the interaction between tropical warm and wet air and westerly cold air, causing convective cloud clusters to form and develop. The rain belt composed of several meso-β cloud clusters over the Liaodong Peninsula, resulting in heavy rainfall. On the other hand, Matsa did not couple with any upper trough during its ET process and the positive anomaly of MPV in the upper troposphere and its downward transfer were weak. Only one meso-β cloud cluster occurred in Matsa’s rain belt during its ET process that tended to lessen rainfall over Liaodong Peninsula.

HTML

Reference (19)

[1]	CHEN Lian-shou, DING Yi-hui. Introductory Summary onWest Pacific Typhoons [M]. Beijing: Science Press, 1979:423-428; 462-474.
[2]	KLEIN P M, HARR P A, ELSBERRY R L. Extratropicaltransition of western North Pacific tropical cyclone:Midlatitude contributions to intensification [J]. Mon. Wea.Rev., 2002, 130(9): 2 240-2 259.
[3]	LI Ying, CHEN Lian-shou, ZHANG Sheng-jun. Variationsin frequency and intensity of landfall tropical cyclones overChina during 1951 �C 2004 [J]. Mar. Forecasts., 2008, 25(1):65-73.
[4]	YUAN Zi-peng, ZHANG Li-xiang. Analysis of climaticcharacteristics on activities of tropical cyclones landing fromthe Yellow Sea or Bohai Sea [J]. Meteor. Mon., 2005, 31(6):39-42.
[5]	LIANG Jun, CHEN Lian-shou. Motion and intensity andimpact characteristics of tropical cyclone affecting theLiaodong Peninsula [J]. J. Trop. Meteor., 2005, 21(4):410-419.
[6]	CHEN Lian-shou. Advances in the Research on TyphoonLandfall [C]// Proceedings of Abstracts of the 11th NationalScience Symposium on Tropical Cyclones. Beijing: ChineseAcademy of Meteorological Sciences, 1999: 11-13.
[7]	CHEN L S. An overview on the impact of interactionbetween low-mid latitude circulation on rainfall and tropicalcyclone behavior [C]// 24th Conference on Hurricane andTropical Meteorology. Am. Meteor. Soc., 2000: 63-65.
[8]	SUN Li, ZHEN Xiu-ya. A diagnostic analysis on anortherward neutercance in its developing process [J]. Meteor.Mon., 1991, 17(10): 3-8.
[9]	ZHU Pei-jun, ZHENG Yong-guang, TAO Zu-yu. Analysisof the extratropical transition of tropical cyclone overmainland of China [J]. J. Trop. Meteor., 2003, 19(2): 157-162.
[10]	ZHU Pei-jun, ZHENG Yong-guang, TAO Zu-yu. Kineticenergy budget of typhoon during extratropical transition [J].Acta Sci. Natur. Univ. Pekinesis, 2005, 41(1): 93-103.
[11]	LI Ying, CHEN Lian-shou, LEI Xiao-tu. Moisturepotential vorticity analysis on the extratropical transitionprocesses of Winnie (1997) and Bilis (2000) [J]. J. Trop.Meteor., 2005, 21(2): 142-152.
[12]	LI Ying, CHEN Lian-shou, LEI Xiao-tu. Numerical studyon impacts of upper-level westerly trough on the extratropicaltransition process of typhoon Winnie (1997) [J]. Acta Meteor.Sinica, 64(5): 552-563.
[13]	HAN Gui-rong, HE Jin-hai, FAN Yong-fu, et al. Thetransfiguration frontogenesis analyses on 0108 landfalltyphoon extratropical transition and heavy rain structure [J].Acta Meteor. Sinica, 2005, 63(4): 468-476.
[14]	HART R E, EVANS J L. A Climatology of theExtratropical Transition of Atlantic Tropical Cyclones [J]. J.Climate, 2001, 14(4): 546-564.
[15]	SINCLAIR M R. Extratropical Transition of SouthwestPacific Tropical Cyclone I: Climatology and Mean StructureChanges [J]. Mon. Wea. Rev., 2002, 130(3): 590-609.
[16]	ZHAO Yu, WU Zeng-mao, LIU Shi-jun, et al. Potentialvorticity analysis of an torrential rain triggered by a neutercanein Shandong province [J]. J. Trop. Meteor., 2005, 21(1): 34-43.
[17]	WEN Li-juan, CHENG Lin-sheng, ZUO Hong-chao, et al.Diagnostic analysis of moist potential vorticity anomaly duringthe may 1998 heavy rainfall of South China in the flood season[J]. J. Trop. Meteor., 2006, 22(5): 447-453.
[18]	WU Hai-ying, SHOU Shao-wen. Potential vorticitydisturbance and cyclone development [J]. J. Nanjing Inst.Meteor., 2002, 25(4): 510-517.
[19]	SINCLAIR M R. Synoptic-scale diagnosis of theextratropical transition of a southwest Pacific tropical cyclone[J]. Mon. Wea. Rev., 1993, 121(4): 941-960.

IMPACTS OF TWO TROPICAL CYCLONES EXPERIENCING EXTRATROPICAL TRANSITION DURING NORTHWARD PROGRESSIONON THE RAINFALL OF LIAODONG PENINSULA

Abstract:

References

Get Citation+

Share Article

Article Metrics

Proportional views

Manuscript History

Online:

通讯作者: 陈斌, bchen63@163.com