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利用ERA-interim再分析资料,分析了1979—2017年北半球温带气旋活动的时空特征:北半球温带气旋数量呈现增加趋势,这一趋势主要在春秋季最为明显;北半球温带气旋数量主要经历过一次趋势转折,发生在1995年前后;以最低气压值约985 hPa为界,弱气旋增加、强气旋减少;以移动距离约1 600 km为界,移动距离短的气旋数量增加、长的气旋数量减少;气旋活动区域的最主要特征为南北摆动,冬春季这一特征最明显。就全年来看,温带气旋活动向极地偏移,欧亚低纬度的活动也有增加的趋势;气旋活动频数增加,气旋强度、持续时间也有所增加。
Abstract：The spatial and temporal characteristics of extratropical cyclones' activity in the northern hemisphere from 1979 to 2017 was studied via ERA-interim re-analysis data, with the following results: the number of extratropical cyclones(ETCs) in the northern hemisphere experienced an increase, especially in spring and autumn; and a trend turning around 1995. On the whole, the trend of change in the number of ETCs in the northern hemisphere is mainly characterized by an increase in weak cyclones and a decrease in strong cyclones; an increase in cyclones with short moving distances and a decrease in the ones with long moving distances; the threshold between strong and weak cyclones is about 985 hPa, and that between short and long is about 1 600 km. The main characteristics of ETCs activity's area is the north-south oscillation. But this pattern is less obvious in the summer and autumn. Overall, the activity of ETCs in the northern hemisphere has a tendency to shift to the polar regions, and a trend of increasing at lower latitude in Eurasia. The strength and duration of the cyclones increase sits as regional cyclone activity increases.
[1] Schultz D M,Bosart L F,Colle B A,et al.Extratropical cyclones:A century of research on meteorology’s centerpiece[J].Meteor Monogr,2019(59):1-16.
[2] Mahcras P,Flocas H A,Patridas I,et al.A 40 year objective climatology of surface cyclones in the Mediterranean region:Spatial and temporal distribution[J].Int J Climatol,2001,21:109-130.
[3] Lionello P,Dalan F,Elvini E.Cyclones in the Mediterranean region:The present and the doubled CO2 climate scenarios[J].Clim Res,2002,22(2):147-159.
[4] Hart R E.A cyclone phase space derived from thermal wind and thermal asymmetry[J].Monthly Weather Review,2003,131:585-616.
[5] Mendes D,Souza E P,Marengo J A,et al.Climatology of extratropical cyclones over the south American-southern oceans sector[J].Theor Appl Climatol,2009,100(3-4):239-250.
[6] Haak U,Ulbrich U.Verification of an objective cyclone climatology for the North Atlantic[J].Meteor Z,1996,5:24-30.
[7] Blender R,Fraedrich K,Lunkeit F.Identification of cyclone-track regimes in the North Atlantic[J].Quart J Roy Meteor Soc,1997,123(539):727-741.
[8] Sinclair M R.An objective cyclone climatology for the southern Hemisphere[J].Mon Wea Rev,1994,122(10):2239-2256.
[9] Hodges K I.Spherical nonparametric estimators applied to the UGAMP mode integration for AMIP[J].Mon Wea Rev,1996,124(12):2914-2932.
[10] Wernli H,Schwierz C.Surface cyclones in the ERA-40 dataset (1958-2001) Part I:Novel identification method and global climatology[J].Journal of the Atmospheric Sciences,2006,63(10):2486-2507.
[11] Sick-Moller M,Blender R,Fraedrich K.Observed winter cyclone tracks in the Northern hemisphere in re-analysed EC-MWF data[J].QJR Meteorol Soc,2000,126:591-620.
[12] Hanley J,Caballero R.Objective identification and tracking of multicenter cyclones in the ERA-interim reanalysis dataset[J].QJR Meteorol Soc,2012,138(664):612-625.
[13] Mccabe G J,Clark M P,Serreze M C.Trends in Northern Hemisphere surface cyclone frequency and intensity[J].J Clim,2001,14:2763-2768.
[14] Raible C C,Della-Marta P,Schwierz C,et al.Northern Hemisphere extratropical cyclones:A comparison of detection and tracking methods and different reanalyses[J].Mon Wea Rev,2008,136:880-897.
[15] Gulev S K,Zolina O,Grigoriev S.Extratropical cyclone variability in the Northern Hemisphere winter from the NCEP/NCAR reanalysis data[J].Clim Dyn,2001,17:795-809.
[16] Serreze M C,Box J E,Barry R G,et al.Characteristics of Arctic synoptic activity,1952-1989[J].Meteorol Atmos Phys,1993,51:147-164.
[17] Serreze M C.Climatological aspects of cyclone development and decay in the Arctic[J].Atmos Ocean,1995,33:1-23.
[18] Zhang X D,Walsh J E,Zhang J,et al.Climatology and interannual variability of arctic cyclone activity 1948-2002[J].J Clim,2004,17:2300-2317.
[19] 周舒,张录军,周玮佳.夏季外来气旋对北极太平洋扇区海冰的影响[J].科学通报,2019,64(18):1922-1929.Zhou S,Zhang L J,Zhou W J.The role of extrtropical cyclones for summertime sea ice melting in Arctic Pacific sector(in Chinese)[J].Chin Sci Bull,2019,64(18):1922-1929.
[20] Geng Q,Sugi M.Variability of the North Atlantic cyclone activity in winter analyzed from NCEP-NCAR reanalysis data[J].J Clim,2001,14:3863-3873.
[21] Graham N E,Diaz H F.Evidence for intensification of North Pacific winter cyclones since 1948[J].Bull Amer Meteor Soc,2001,82:1869-1893.
[22] Favre A,Gershunov A.Extra-tropical cyclonic/anticyclonic activity in North-Eastern Pacific and air temperature extremes in Western North America[J].Clim Dyn,2006,26:617-629.
[23] Simmonds I,Keay K.Surface fluxes of momentum and mechanical energy over the North Pacific and North Atlantic Oceans[J].Meteorol Atmos Phys,2002,80:1-18.
[24] 张颖娴,丁一汇,李巧萍.ERA40再分析资料揭示的北半球和东亚地区温带气旋生成频率变化[J].气象,2012,38(6):646-656.Zhang Y X,Ding Y H,Li Q P.Cyclogenesis frequency changes of extratropical cyclones in the North Hemisphere and East Asia revealed by ERA50 reanalysis data[J].Metrorological Monthly,2012,38(6):646-656.
[25] 张颖娴.北半球温带气旋的气候学及其变率研究[D].北京:中国气象科学研究院,2012.Zhang Y X.A Climatology and Variation Research of Extrtropical Cyclones in the North Hemisphere[D].Beijing:Chinese Academy of Meteorological Sciences,2012.
[26] Hart R E.A cyclone phase space derived from thermal wind and thermal asymmetry[J].Mon Wea Rev,2003,131(4):585-616.
[27] 任丽媛,刁一娜.冬季北太平洋的温带气旋活动及其与前期秋季北极海冰的关系[J].中国海洋大学学报(自然科学版),2018,48(3):20-29.Ren L Y,Diao Y N.Variability of winter extratropical cyclone activity in the north Pacific and its relationship with previous autumn Arctic Sea Ice[J].Periodical of Ocean University of China,2018,48(3):20-29.
[28] 左斌.气候趋势转折检测的新方法与全球表面气温趋势转折的时空特征[D].兰州:兰州大学,2019.Zuo B.Development of a New Detection Method for Climate Trend Turning and the Spatial-Temporal Characteristics of Global Surface Air Temperature Trend Turnings[D].Lanzhou:Lanzhou University,2019.
[29] Pinto J G,Spangehl T,Ulbrich U,et al.Sensitivities of a cyclone detection and tracking algorithm:Individual tracks and climatology[J].Meteorol Z,2005,14:823-838.
[30] Bengtsson L,Hodges K I,Roeckner E.Storm tracks and climate change[J].J Clim,2006,19:3518-3543.
[31] Ulbrich U,Leckebusch G C,Pinto J G.Extratropical cyclone features in present and future climate:A review[J].Theor Appl Climatol,2009,96:117-131.
[32] Simmonds I,Keay K.Mean southern hemisphere extratropical cyclone behavior in the 40-Year NCEP-NCAR reanalysis[J].J Climate,2000,13:873-885.
基本信息:
DOI：10.16441/j.cnki.hdxb.20200029
中图分类号:P447
引用信息:
[1]孙瑞鹏,刁一娜.1979—2017年北半球温带气旋活动时空特征统计分析[J],2020,50(12):12-21.DOI:10.16441/j.cnki.hdxb.20200029.
基金信息:
国家重点研究发展计划项目(2019YFA 0607002);; 山东省自然科学基金重大基础研究项目(ZR2019ZD12)资助~~