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《Periodical of Ocean University of China》 2017-08
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Statistical Features of Explosive Cyclones over the Northern Pacific

ZHANG Shu-Qin;FU Gang;Department of Marine Meteorology,College of Oceanic and Atmospheric Sciences,Ocean University of China;  
The climatological features of explosive cyclones(ECs)over the Northern Pacific(20°N~65°N,110°E~100°W)during the recent 15cold-seasons from October 2000 to April 2015 are analyzed by using Final Operational Global Analysis(FNL)data.According to the meridional distribution of maximum deepening rate position and the temporal resolution of FNL data,the definition of EC is modified into a cyclone whose central sea level pressure decrease normalized at 45 o N is greater than 12 hPa within 12 h.These ECs are classified into four categories according to their intensities:weak,moderate,strong and super ECs.Additionally,according to the five high occurrence number centers of the maximum deepening rate position,ECs are further classified into five regions:the Japan-Okhotsk Sea(JOS),the Northwestern Pacific(NWP),the West-Central Pacific(WCP),the East-Central Pacific(ECP),and the Northeastern Pacific(NEP).The statistical analyses show that the occurrence number of ECs decreases eastward over the Northern Pacific.The features of ECs are strongly related to their explosivedeveloping regions.NWP ECs are most frequent in winter and early spring season,while NEP ECs mainly occur in autumn and early spring season.Comparing with NEP ECs,NWP ECs exhibit stronger intensification rate,lower minimum central sea level pressure,longer developing and explosive-developing lifetimes.The tracks of NWP ECs are typically northeastward direction and their tracks show more uniform characteristics with intensity.The direction of moving tracks for NEP ECs is depended on their formation regions.Those NEP ECs originating from the West-Central Pacific and Central Pacific usually move eastward in early stage and turn to northeastward in later stage.While those NEP ECs forming over the East-Central Pacific usually move northeastward.The warm oceanic current provides favorable environmental conditions for the rapid development of ECs.
【Fund】: 国家自然科学家基金项目(41275049)资助~~
【CateGory Index】: P447
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 ZHANG Shu-Qin;FU Gang;Department of Marine Meteorology,College of Oceanic and Atmospheric Sciences,Ocean University of China;;Statistical Features of Explosive Cyclones over the Northern Pacific[J];中国海洋大学学报(自然科学版);2017-08
2 SUN Ya-Wen;FU Gang;ZHANG Shu-Qin;The Key Laboratory of Physical Oceanography,Ministry of Education,College of Oceanic and Atmospheric Sciences,Ocean University of China;;Study on Explosive Developed Cyclone Transformed from Typhoon LUPIT over the Northwestern Pacific[J];中国海洋大学学报(自然科学版);2017-05
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