摘要
利用英国Hadley气候预测和研究中心的HadISST资料,对南大西洋海域的海表温度(sea surface temperature,SST)进行了研究.研究发现:①该海域2月和5月的SST明显大于8月和10月,SST由低纬向高纬逐渐递减,在南极达到最低,等值线呈东西带状分布,南极的SST常年基本都在0℃以下,在同一纬度,大洋西岸的SST高于大洋东岸;②近140年间,南大西洋海域的SST整体上以0.004 5℃/a的速度逐年显著性线性递增,在1870—1930年期间SST并无显著变化,在1931—2009年期间的递增趋势非常显著,从区域性的角度来看,南大西洋大部分海域以3×10-3～9×10-3℃/a的速度逐年显著性线性递增,逐年显著性线性递减的区域主要集中于南极,递减趋势基本在-6×10-3～-3×10-3℃/a之间;③南大西洋海域的SST存在2.3,2.9,3.3,3.9～4.3,4.7～5.3a的变化周期及90a左右的长周期震荡,但无显著的突变形势.
By using the HadISST data from British Hadley climate prediction and research center,we analyzed the characteristic of SST（Sea Surface Temperature） in the South Atlantic Sea.Results show that：（1） The South Atlantic SST in February and May is significantly greater than that in August and October.The SST gradually decline from low latitude to high-latitude,the lowest in the Antarctic.SST in the ocean west coast is higher than the ocean east coast in the same latitude.（2） Over the last 140 years,the South Atlantic SST has a obvious annual increasing trend,of about 0.004 5 ℃/a.There is no significant change in the period of 1870-1930 and very significant increasing trend in the period of 1930-2009.In the view of the regional difference,the SST increasing trend in most of the South Atlantic Ocean is 3×10^-3-9×10^-3 ℃/a,and the decreasing area mainly focus on the Antarctic,the decreasing trend is between of-6×10^-3-—3×10^-3 ℃/a.（3） The South Atlantic Ocean SST has the 2.3 years,2.9 years,3.3 years,3.9-4.3 years,4.7-5.3 years periods and above 90 years long period shocks,without significant mutations situation.
出处
《延边大学学报（自然科学版）》
CAS
2013年第2期153-156,共4页
Journal of Yanbian University（Natural Science Edition）
关键词
南大西洋
HadISST
季节特征
变化趋势
突变
周期
South Atlantic Ocean
HadISST
seasonal characteristic
increasing trend
mutations
period
