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通过对1999年所采错鄂CE 1孔自生碳酸盐碳、氧同位素与1955—1999年器测温度降水资料的统计分析,获取了自生碳酸盐碳、氧同位素与气候要素的定量关系,并据此恢复了1770年以来该地区的古气候。结果表明,错鄂沉积物中自生方解石氧同位素与气温显示出较好的正相关性,而与降水相关性不明显;碳同位素刚好相反,它与降水负相关,而与气温相关性不显著。1770年以来,错鄂地区在20世纪初气候环境发生了根本的改变,1900年以前降水偏少,为沼泽环境,1900年后降水增加,湖泊发育;1900年前后气温开始上升,30年代后期气温达到峰值,50年代初气温稍有下降。1935—1999年平均气温较前一百多年升高了近1℃。所获结果有较好的区域对比性。
Based on the statistical analysis of the measured data of carbonates and oxygen isotopes of carbonates and carbon isotopes from CE 1 hole collected in 1999 in Hubei Province and the measured temperature from 1955 to 1999, the quantitative relationships between carbon and oxygen isotopes of carbonates and climatic elements were obtained. And accordingly restored the paleoclimate in the area since 1770. The results show that the oxygen isotopic composition of authigenic calcite in the sediments of Erzhe Lake shows a good positive correlation with the temperature but not with the precipitation. The carbon isotope is just the opposite, which is negatively correlated with precipitation but not significant with the temperature. Since 1770, the climate in the region of erhu has undergone fundamental changes in the climate in the early 20th century. Precipitation was relatively low before 1900, which was a marsh environment. After 1900, precipitation increased and lakes developed. Before and after 1900, temperatures began to rise and the temperature in the late 1930s Peak, the temperature slightly decreased in early 1950s. The average temperature in 1935-1999 increased by nearly 1 ℃ over the previous one hundred years. The results obtained have better regional contrast.