巴伦支海地区混合层深度与冰盖的关系及时间变化特征
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摘要
以北极巴伦支海地区30°E—40°E、70°N—80°N为研究区域,据2007—2009年的CTD数据,采用温度差值法计算出该区域混合层深度(MLD)的一些散点值,然后将MLD数据网格化,分析该区域在2007—2009年的MLD和冰盖(ICE)的变化及两者间的关系.研究结果表明:MLD在秋季小,春季波动较大,每年的7月达到最小值;ICE从每年的4月或5月开始下降,9月达到最小值;ICE和MLD之间呈正相关,2007年的相关系数最大,为0.637,将MLD数据向后平移2个月后整个区域的相关系数变大,2007年达到0.826;融冰量与MLD呈负相关,2009年的相关系数为-0.535;海冰变化对MLD的变化有提前2个月的影响;MLD的自相关性随时间间隔的增大而递减;MLD与ICE的相关性与他们各自变量本身的自相关性没有必然的联系.
The study area is the Arctic Barents sea region: 30°E—40°E, 70° N—80°N. According to the 2007—2009extracted CTD data, using temperature difference method to calculate the value of some scatter Mixed Layer Depth(MLD) in the region. R statistical software was used to manage the MLD values in data grid. MLD and ICE data distributions and relationship were calculated form 2007 to 2009 in the study region. MLD was higher in spring and reached to its valley in July. ICE was higher in March and reduced to its minimum in September. MLD had a positive correlation with ICE. Year 2007 had a maximum correlation coefficient 0.637. The peak of ICE was two months ahead of MLD. After shifting ICE two months behind, the correlation between ICE and MLD reached to 0.826 in 2007.Melting ice was negatively correlated with MLD in the southern region. The correlation coefficient in 2009 was-0.535. The autocorrelation of MLD would decrease with increase of time lag. There is no link between the correlation of the two parameters and autocorrelations of each parameter.
The study area is the Arctic Barents sea region: 30°E—40°E, 70° N—80°N. According to the 2007—2009extracted CTD data, using temperature difference method to calculate the value of some scatter Mixed Layer Depth(MLD) in the region. R statistical software was used to manage the MLD values in data grid. MLD and ICE data distributions and relationship were calculated form 2007 to 2009 in the study region. MLD was higher in spring and reached to its valley in July. ICE was higher in March and reduced to its minimum in September. MLD had a positive correlation with ICE. Year 2007 had a maximum correlation coefficient 0.637. The peak of ICE was two months ahead of MLD. After shifting ICE two months behind, the correlation between ICE and MLD reached to 0.826 in 2007.Melting ice was negatively correlated with MLD in the southern region. The correlation coefficient in 2009 was-0.535. The autocorrelation of MLD would decrease with increase of time lag. There is no link between the correlation of the two parameters and autocorrelations of each parameter.
引文
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[3]Deser C E,Walsh J E,Timlin M S.Arctic sea ice variability in the context of recent atmospheric circulation trends[J].Journal of Climate,2000,13(3):617-625.
[4]Hutchings J,Kikuchi T.Sea ice dynamics/thermodynamics observations in the arctic ocean[R].JAMSTEC-IARC Collaboration Study,2013.
[5]Vernet M,Martinson D G,Iannuzzi R,et al.Primary production within the sea-ice zone west of the Antarctic Peninsula:I-Sea ice,summer mixed layer,and irradiance[J].Deep Sea Research Part II:Topical studies in Oceanography,2008,55(18/19):2068-2085.
[6]Toole J M,Timmermans M L,Perovich D K.Influences of the ocean surface mixed layer and thermohaline stratification on Arctic Sea ice in the central Canada Basin[J].Journal Of Geophysical Research,2010,115(C10018115):1-14.
[7]Goosse H,Deleersnijder E,Fichefet T.Sensi tivity of a global coupled ocean-sea ice model to the parameterization of vertical mixing[J].Journal Of Geophysical Research,1999,104(C6),13681-13695.
[8]Sprinatall J,Tomczak M.Evidence of barrier layer in the surface layer of tropics[J].Geophys Res,1992,97(C5):7305-7316.
[9]Qu Bo,Gabric A J,Matrai P A.The satellite-derived distribution of chlorophyll-a and its relation to ice cover,radiation and sea surface temperature in the barents sea[J].Polar Biology,2006,29(3):196-210.
[10]路海浪,潘骏,朱竞南,等.格陵兰海的有效光合辐射与冰盖融化的关系研究[J].南通大学学报:自然科学版,2010,9(4):89-94.
[11]张赛英,潘黎明,郭聪敏,等.巴伦支海的冰盖与气溶胶光学厚度的耦合关系[J].南通大学学报:自然科学版,2011,10(4):88-94.
[12]Qu Bo,Gabric A J,Zhu Jingnan,et al.Correlation between sea surface temperature and wind speed in Greenland Sea and their relationships with NAO variability[J].Water Science and Engineering,2012,5(3):304-315.