辽宁抚顺盆地始新世古气候定量研究  被引量:15

Quantitative Reconstruction of the Eocene Palaeoclimate in the Fushun Basin,Liaoning Province

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作  者:史冀忠[1] 刘招君[1] 柳蓉[1] 杜江峰[1] 张健[1] 刘沣[1] 

机构地区:[1]吉林大学地球科学学院,长春130061

出  处:《吉林大学学报(地球科学版)》2008年第1期50-55,共6页Journal of Jilin University:Earth Science Edition

基  金:国家自然科学基金项目(40672075);高等学校博士学科点专项科研基金项目(20050183051)

摘  要:利用德国科学家Mosbrugger和Utescher在1997年提出的共存分析法对辽宁抚顺盆地始新世古气候进行定量重建。通过共存分析获得的抚顺盆地始新世古气候参数为:年均温度为14.3~19.8℃(中值为17.05℃),最热月均温为24.1~27.7℃,最冷月均温为2.5~10.9℃,年较差为17.7~22.7℃,年降雨量为803.6~1113.3mm(中值为958.45mm),最大月降雨量为179.4~268.1mm,最小月降雨量为10.2~12.7mm。与现代气候对比发现:始新世时气温较现在(7.8℃)高9.25℃,年降雨量较现在(734.5mm)多约224mm,始新世时属于亚热带季风气候,现今为温带季风气候。Using the coexistence approach proposed by Mosbrugger and Utescher in 1997, the Eocene paleoclimate of the Fushun Basin in Liaoning Province had been quantitatively reconstructed. The Eocene paleoclimatic parameters of the Fushun Basin obtained are as the followings, the mean annual temperature(MAT) 14.3 - 19.8℃ (the median is 17.05℃), the mean temperature of the warmest month (MWMT) 24.1 - 27.7℃, the mean temperature of the coldest month (MCMT) 2.5 - 10.9℃, the difference of temperatures between the coldest and warmest months (DT) 17.7 - 22.7℃, the mean annual precipitation(MAP) 803.6 -1 113.3 mm( the median is 958.45 mm) ,the mean maximum monthly precipitation (MMaP) 179.4 - 268.1 mm, the mean minimum monthly precipitation (MMiP) 10.2 - 12.7 mm. Compared with the current climate, the temperature of the Eocene is about 9.25℃ higher than that of nowadays(7.8℃), and the mean annual precipitation is about 224 mm more than that of nowadays(734.5 mm). The Eocene climate belongs to subtropical monsoon while the present climate belongs to temperate monsoon.

关 键 词:始新世 孢粉 古气候 共存分析法 定量重建 

分 类 号:P532[天文地球—古生物学与地层学]

 

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