HIGH RESOLUTIONAL RECONSTRUCTION OF TROPICAL ENVIRONMENTS AND EVALUATION OF LINKAGE BETWEEN HIGHLATITUDE ICEASHEETSAND LOALATITUDE ENVIRONMENTS

西太平洋暖池（英语：Western Pacific Warm Pool）是赤道西太平洋的一个特征，它拥有世界上最高的开放海洋水温，表面积约为2.0×10^7 km^2，从100°E延伸到180 ° E，是地球上最大的单一暖水区。新几内亚附近的这片海洋温度一直高于28℃，比其他赤道地区高出2至5℃。为了了解澳大利亚季风的演变，利用帝汶海的MD 05 -2970资料，对现代至22万年的澳大利亚季风进行了高分辨率研究。我们的浮游有孔虫氧同位素组成范围从末次冰期最大值的-1.0 permil到全新世的-2.8 permil，这与以前报道的附近地区的记录一致。研究表明，末次盛冰期和末次间冰期的氧同位素结构相似。然而，从Makasser海峡获得的氧同位素记录显示，最后两次盛冰期和间冰期分别为-1.0 permil和-4.0 permil。氧同位素的任何差异都可归因于海水中氧同位素的变化，这是由于水文差异造成的。这些结果表明，南极夏季风并不像今天这样强烈，在冰期期间造成两者之间的盐度差异。

The equatorial western Pacific is characterized by the Western Pacific Warm Pool (WPWP) which has the highest open-ocean water temperatures in the world and a surface area of approximately 2.0×10^7 km^2 extending from 100°E to 180, the largest single expanse of warm water on our planet. This swath of ocean near New Guinea has a temperature consistently higher than 28℃, about 2 to 5℃ higher than that of other equatorial regions. The temperature and geographic extension of the WPWP fluctuate from year to year and have a relation with ENSO (El Nino - Southern Oscillation) events.High resolution study from the modern to 220 kyr was conducted by using MD05-2970 obtained from Timor Sea to understand the evolution of the Australian monsoon since previous works proposed much lesser Australian monsoon during the ice ages. Our planktonic foraminiferal oxygen isotopic compositions range from -1.0 permil for the last glacial maximum to -2.8 permil for the Holocene which is consistent with the record previously reported from nearby locations. The present study showed the similar structures of oxygen isotopes between the penultimate glacial maximum and the last interglacial. However the oxygen isotope record obtained from the Makasser Strait indicated -1.0 permil and -4.0 permil respectively for the last two glacial maxima and the interglacials. Any discrepancies in the oxygen isotopes are attributable to changes in the oxygen isotopes of seawater due to the hydrological differences. These results shows that Austral summer monsoon was not as strong as today to create salinity differences between the two during the glacial times.