中文摘要：

利用Ishii温盐资料及T/P高度计资料,分析上层700m全球及区域海水热含量变化特征,并探讨海平面变化与上层海水热含量的关系.研究结果表明,1945—2006年全球大部分海域上层700m海水热含量均存处于上升趋势,全球平均上升速率为2.1×107J/（m2.a）,并表现出显著的年际和年代际变化,尤其在湾流附近海域上升明显,最大可达6.5×107J/（m2.a）;但在黑潮延伸体海域、太平洋40°S附近的带状海域、西太暖池以及赤道印度洋附近海域,海水热含量呈下降趋势,最大下降速率可达6.0×107J/（m2.a）.1993—2006年,海水热含量和海平面在南（15°S~64°S）、北（15°N~64°N）半球均存在显著的季节变化,且位相相反,热带海域季节变化不明显,表现出显著的半年周期信号.在南半球低纬和高纬海域,海水热含量和海平面的季节变化较弱,热含量对海平面变化的影响较小.北半球海水热含量和海平面的年际和年代际变化较一致;而在南半球,尤其是低纬海域,海平面变化滞后海水热含量变化,甚至有相反的变化规律.

英文摘要：

Based on the Ishii temperature and salinity data and T/P altimeter data,the variation characteristics of the global and regional ocean heat content of upper 700 m were studied,and the relationship between the sea level variation and upper ocean heat content was examined.The results show that from 1945 to 2006,most global ocean heat content of upper 700 m rises at a average rising rate of 2.1×107J/（m2·a）,especially near the Gulf Stream where the maximum rising rate is 6.5×107J/（m2·a）,and it shows obvious interannual and interdecadal changes.The ocean heat content decreases in the Kuroshio extension region,zonal area near 40°S in the Pacific Ocean,Western Pacific Warm Pool,and sea area near the Equatorial Indian Ocean,and the maximum decline rate is 6.0×107J/a.From 1993 to 2006,the ocean heat content and sea level show obvious seasonal variations in both southern and northern hemispheres with opposite phases,show no obvious seasonal variation and a notable semiannual period in the tropical sea areas,show weak seasonal variation in the low-and high-latitude areas in the southern hemisphere.The heat content has little effect on the sea level in the low-and high-latitude area in the southern hemisphere.The interannual and interdecadal variations of the ocean heat content agree with those of sea level in the northern hemisphere,while in the southern hemisphere,especially in the low-latitude sea areas,the sea level variation lags behind the heat content variation,and their evolutions are even opposite.