Spatio-temporal characteristics of antarctic temperature and sea ice and their relationship

Spatio-temporal characteristics of antarctic temperature and sea ice from 1973 to 2000 have been statistically analyzed.Result shows that: the lowest temperature center in Antarctica lies in Southeast Antarctic Mainland, and the distribution characteristic corresponds with the antarctic topography; the annual temperature of Vostok station is -55.3.The highest temperature is -32.1℃ between December and January next year, and the lowest is - 68.2 in August.The surface temperature of different sectors in Antarctica shows different characteristics.According to their variable characteristics, the climate of Antarctica can be divided into four types: Antarctic Continent type, Antarctic Peninsula type, southeast pole coast type and gulf type.In recent years, there is an obvious warming trend in the Antarctic Peninsula, however an obvious colding trend in the southeast pole coast, and their variation shows obvious anti-phase.There is a close response relationship between the sea ice and the temperature in Antarctica, the sea ice becomes least where it becomes warmer in the Antarctic Peninsula, however the sea ice becomes more where it becomes colder in southeast pole.It is difficult to explain such result by the effect of green-house.The anomalous variation of the antarctic sea ice extent has an influence on the warmer and cooler structure of the Antarctic Circumpolar Current and on the long itudinal transportation of ano malous warmer and cooler water, and then leads to the anomalous variation of upper ocean in the tropical and subtropical Pacific.