从等温线的变化看中国大陆对全球升温的时空响应

利用中国气象中心160站点的实际观察资料,对中国半个世纪的气温变化进行了分析。通过利用插值法对各个站点的数据进行处理,分别做出50年代和90年代多年平均的冬夏季节以及年等温线。通过对比每个季节不同年代的等温线,发现中国的年等温线分布态势由夏季气温分布主宰。在这半个世纪中中国冬季和夏季等温线的分布以及变化存在很大的不同:冬季等温线基本上向高纬度方向移动,而夏季以高温和低温中心为基点,向高温或低温方向移动。夏季等温线变动幅度相对小,但夏季存在区域性的降温现象。在幅度上,等温线移动基本上是由南向北普遍增大,西北地区最大。最后对等温线的变化所揭示的气温变化规律以及气温变化的时空差异进行了机理上的分析和讨论。

Temporal-spatial Response of China Mainland to Global Warming Based on Isothermal Variation

Interpolation was applied to analyze the data provied by 160 stations of the National Climatic Center(NCCC) of the China Meteorological Administration(CMA).The annual,summer and winter isotherm structures of 1950s and 1990s were respectively worked out to show the isotherm structure variations.The annual isotherm structure was dominated by the summer temperature structure,and the isotherm structure generally moved northward in winter,but in summer,characterized with high-temperature or low-temperature centers,the isotherm moved toward the temperature centers,indicating that the temperature in highland areas was increasing but that in lowland areas was decreasing.The isotherm moved with lager extent in higher latitude.In the end,the temperature variation law discovered by the isotherm variation and the temporal-spatial temperature variation difference were discussed.