樊婷婷,黄菲,苏洁

• 1:中国海洋大学物理海洋实验室
• 2:中国极地研究中心

摘要(Abstract)：

利用31a(1979—2009)气候月平均的海平面气压(SLP)资料,提出1种与北半球中高纬度环流转变相适应的分季法。并根据这个客观分季方法,通过SEOF分析,发现大气环流主模态的季节演变有着典型的北极涛动(AO)空间结构,其时间系数在1990年代中期发生转型。500hPa上纬向波的涡度有着南北反位相的分布特征,冬季正涡度的区域对应着气旋性环流,其覆盖范围广,而夏季正涡度区域更偏北,可见AO在冬季增强,夏季减弱。北半球SLP异常的EOF分解第一模态为北极涛动(AO),第二模态是偶极异常(DA);将这2个模态称之为北半球中高纬度大气环流异常的优势模态。通过计算优势模态与海冰面积的超前滞后相关性,发现AO依然是控制海冰变化的前期大气环流异常的模态,而DA则可能是海冰快速变化后期大气环流的主导模态。

关键词(KeyWords)： 客观分季;中高纬;大气环流;季节演变;优势模态;北极海冰

Abstract:

Keywords:

基金项目(Foundation): 全球变化研究国家重大科学研究计划项目(2010CB951403);; 国家自然科学基金项目(40876003;40975038)资助

作者(Author): 樊婷婷,黄菲,苏洁

DOI: 10.16441/j.cnki.hdxb.2012.z2.003

参考文献(References)：

• [1]Comiso J C,Parkinson C L,Gersten R,et al.Accelerated declinein the Arctic sea ice cover[J].Geophysical Research Letters,2008,35,L01703,doi:10.1029/2007GL031972.
• [2]Thompson D W J,Wallace J M.The Arctic Oscillation signaturein the wintertime geopotential height and temperature fields[J].Geophysical Research Letter,2008,25:1297-1300.
• [3]Rigor I G,Wallace J M,Colony R L.Response of sea ice to theArctic oscillation[J].J Climate,2002,15:2648-2663.
• [4]Deser C,Walsh J E,Timlin M S.Arctic Sea Ice variability in thecontext of recent atmospheric circulation trends[J].J Climate,2000,13:617-633.
• [5]Maslanik J,Drobot S,Fowler C,et al.On the Arctic climate par-adox and the continuing role of atmospheric circulation in affectingsea ice conditions[J].Geophysical Research Letters,2007,34,L03711.doi:10.1029/2006GL028269.
• [6]Zhang X,Sorteberg A,Zhang J,et al.Recent radical shifts in at-mospheric circulations and rapid changes in arctic climate system[J].Geophysical Research Letters,2005,35,L22701,doi:10.1029/2008GL035607.
• [7]Zhang J,Lindsay R.The thinning of arctic sea ice,1988–2003:Have We Passed a Tipping Point?[J].J Climate,2005,18:4879-4894.
• [8]Deser C,Teng H.Evolution of Arctic sea ice concentration trendsand the role of atmospheric circulation forcing,1979-2007[J].Geophysical Research Letters,2008,35,L02504,doi:10.1029/2007GL 032023.
• [9]Wang J,Zhang J,Watanabe E,et al.Is the dipole anomaly a ma-jor driver to record lows in Arctic summer sea ice extent?[J].Ge-ophysical Research Letters,2009,36,L05706,doi:10.1029/2008GL036706.
• [10]Wu B Y,Zhang R H,Wang B.On the association betweenspring arctic sea ice concentration and Chinese summer rainfall:A further study[J].Adv Atmos Sci,2009,26(4):666-678.
• [11]汪代维,杨修群.北极海冰变化的时间和空间型[J].气象学报,2002,60(21):129-138.
• [12]Wang B,An S I.A method for detecting season-dependent modesof climate variability:S-EOF analysis[J].Geophysical ResearchLetters,2005,Vol.32,L15710,doi:10.1029/2005GL022709.
• [13]Wallace J M,Thompson D W J.The Pacific center of action ofthe northern hemisphere annular mode:Real or artifact?[J].JClimate,2002,15:1987-1991.
• [14]Robert X B,Brent A M.Submothly polar vortex variability andstratosphere-troposphere coupling in the Arctic[J].J Climate,2009,22:5886-5900.
• [15]Thompson D W J,Wallace J M.The Arctic oscillation signaturein the wintertime geopotential height and temperature fields[J].Geophysical Research Letter,2008,25:1297-1300.
• [16]Zhang J,Rothrock D,Steele M.Recent changes in arctic sea ice:The interplay between ice dynamics and thermodynamics[J].JClimate,2000,13:3099-3114.
• [17]武炳义.冬季北极海冰运动主模态的构成及其与海平面气压变化的关系[J].大气科学,2005,29(5):747-760.
• [18]Zhang J,Lindsay R,Steele M,et al.What drove the dramaticretreat of arctic sea ice during summer 2007?[J].GeophysicalResearch Letters,2008,35,L11505,doi:10.1029/2008GL034005.
• [19]Overland J E,Wang M.The third Arctic climate pattern:1930sand early 2000s[J].Geophysical Research Letters,2005,32,L23808.doi:10.1029/2005GL024254.
• [20]Serreze M C,Holland M M,Stroeve J.Perspectives on Arctic'sshrinking sea-ice cover[J].Science,2007,315:1533-1536.
• [21]Simmonds I,Keay K.Extraordinary september Arctic sea ice re-ductions and their relationships with storm behavior over 19792008[J].Geophysical Research Letters,2009,36,L19715,doi:10.1029/2009GL039810.
• [22]Serreze Mark C,Andrew P Barrett.Characteristics of the beaufortsea high[J].J Climate,2011,24:159-182.
• [23]Wu B,Wang J,Walsh J E.Dipole Anomaly in the winter Arcticatmosphere and its association with Arctic sea ice motion[J].JClimate,2006,19:210-225.
• [24]Stroeve J,Holland M M,Meier W,et al.Arctic sea ice decline:faster than forecast[J].Geophysical Research Letters,2007,34,L09501.doi:10.1029/2007GL029703.
• [25]Walsh J E,Johnson C M.Analysis of Arctic sea ice fluctuations1953-77[J].Journal of Physical Oceanography,1979,9(3):580-591.
• [26]Simmonds I,Burke C,Keay K.Arctic climate change as mani-fest in cyclone behavior[J].J Climate,2008,21:5777-5796.
• [27]Zhang X D.Sensitivity of arctic summer sea ice coverage to globalwarming forcing:towards reducing uncertainty in arctic climatechange projections[J].Tellus,2010,62A:220-227.

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