摘要
In this paper, the long-term variation trend of the Antarctic sea ice in 1973～1994 and the inter-decade variation rule of the global sea level are analyzed. It is found that the sea ice area in the Antarctic in the 1980s was significantly less than in the 1970s and the average global sea level height value in the 1980s was also significantly higher than in the 1970s. Connecting variation of both and analyzing their physical mechanism, it indicates that the accumulated sea ice anomaly value in the 1980s less than in the 1970s means a global climate warming, the sea water temperature and air temperature were obviously higher in the 1980s it introduced the long-term accumulated sea ice decreased greatly; a higher sea water temperature introduced sea water volume expanding, and more icebergs transporting from the ice cover in the Antarctic continent to ocean in the warmer year. As a result induced by these multi-causes, the global sea level raised significantly in the 1980s. The global average sea level value in the 1980s, was 22 mm higher than in the 1970s. The sea level raising(SLR) was distributed unevenly. It is especially true in the Pacific Ocean with two expensive we level raising regions in the Northeast Pacific and Southeast Pacific as well as a raising region near the Bering Sea; and with two descent regions in the Northwest and Southwest Pacific. It is considered that this kind of uneven SLR distribution closely relates to the sustained decreasing of the Antarctic sea ice. The higher sea water tem This study was supported both by the National Natural Science Foundation of China under contrast Nod 49376252 and by the National '85' Plan 'Key Project 903': 7th Popect.perature in the south ocean introduces a rather warmer water temperature of the Peru Cold Current which is a northward branch of the South Oceanic Current along the South American continent, then it is easier to the occurrence of El Nino event. When El Nino event occurs, the prevailed tropical easterlies over the Pacific weaken and the westerlies intensify. Normally, the sea level is higher in the west and low in the east. A lot of sea water is transported from west to east caused by gravity and wind dynamics in this situation. The uneven distribution of raising in the eastern Pacific and descending in the western Pacific was introduced.
In this paper, the long-term variation trend of the Antarctic sea ice in 1973～1994 and the inter-decade variation rule of the global sea level are analyzed. It is found that the sea ice area in the Antarctic in the 1980s was significantly less than in the 1970s and the average global sea level height value in the 1980s was also significantly higher than in the 1970s. Connecting variation of both and analyzing their physical mechanism, it indicates that the accumulated sea ice anomaly value in the 1980s less than in the 1970s means a global climate warming, the sea water temperature and air temperature were obviously higher in the 1980s it introduced the long-term accumulated sea ice decreased greatly; a higher sea water temperature introduced sea water volume expanding, and more icebergs transporting from the ice cover in the Antarctic continent to ocean in the warmer year. As a result induced by these multi-causes, the global sea level raised significantly in the 1980s. The global average sea level value in the 1980s, was 22 mm higher than in the 1970s. The sea level raising(SLR) was distributed unevenly. It is especially true in the Pacific Ocean with two expensive we level raising regions in the Northeast Pacific and Southeast Pacific as well as a raising region near the Bering Sea; and with two descent regions in the Northwest and Southwest Pacific. It is considered that this kind of uneven SLR distribution closely relates to the sustained decreasing of the Antarctic sea ice. The higher sea water tem This study was supported both by the National Natural Science Foundation of China under contrast Nod 49376252 and by the National '85' Plan 'Key Project 903': 7th Popect.perature in the south ocean introduces a rather warmer water temperature of the Peru Cold Current which is a northward branch of the South Oceanic Current along the South American continent, then it is easier to the occurrence of El Nino event. When El Nino event occurs, the prevailed tropical easterlies over the Pacific weaken and the westerlies intensify. Normally, the sea level is higher in the west and low in the east. A lot of sea water is transported from west to east caused by gravity and wind dynamics in this situation. The uneven distribution of raising in the eastern Pacific and descending in the western Pacific was introduced.
