中全新世云南寻甸地区气候演化过程及其驱动机制初步研究  

Preliminary research on climate evolution and driving mechanism during the Middle Holocene in Xundian,Yunnan

作　　者：张会领[1,2,3,4] 覃嘉铭[3,4] 蒲晓强[2,5] 

机构地区：[1]广东海洋大学工程学院海洋工程系,广东湛江524088 [2]中国科学院南海海洋研究所边缘海地质重点实验室,广东广州510301 [3]中国科学院研究生院,北京100149 [4]中国地质科学院岩溶地质研究所岩溶动力学开放实验室,广西桂林541004 [5]广东海洋大学海洋与气象学院海洋科学系,广东湛江524088

出　　处：《中国岩溶》2010年第4期396-401,共6页Carsologica Sinica

基　　金：973课题(2007CB815905);国家自然科学基金课题(40830852);ARC课题(DP0773081);中国科学院广州天然气水合物研究中心课题号:0907s5);广东海洋大学校选课题(1012159)

摘　　要：通过对云南寻甸仙人洞XR1石笋进行TIMS-U系测年、氧碳同位素、有机碳含量分析,重建了寻甸地区中全新世季风气候演化模式：（1）8.0－6.0ka B.P.为温暖湿润期;（2）6.0－5.1ka B.P.为气候突变期,气候由温湿变为冷干;（3）5.1－2.1ka B.P.为凉干期。通过石笋有机碳含量与石笋δ18O记录对比,认为石笋有机碳可以反映气候变化,但是存在滞后效应。最后,利用XR1石笋δ18O记录与北半球33°N太阳辐射量,本文初步分析了云南寻甸地区中全新世气候变化的驱动因素：寻甸地区中全新世气候的整体变化趋势受33°N太阳辐射量控制,同时受中全新世火山活动的影响。By dating ages of TIMS-U series and analyzing carbon and oxygen isotope and content of organic carbon in XR1 stalagmite from Xianren Cave in Xundian, Yunnan, the paper reconstructs monsoon climate change pattern during the middle Holoeene in Xundian. It can be divided into three climate periods approximately： （1） 8.0-6.0ka B. P. was warm and wet period; （2） 6.0-5. lka B.P. was climate change period. During the period, climate changed from wet and warm to cold and dry; （3） 5.1-2. lka B.P. was climate recovering period. In the period, the climate changed from cold and dry to the average climate level of the Middle Holocene. After contrasting organic carbon variation to δ^18 O record , it reveals that organic carbon in stalagmite can reflect climate change. But organic carbon variation lags to climate change. At last, on the basis of δ^18O record and summer solar radiation at 33°N latitude, the driven factors of climate change in Xundian, Yunnan Province dring the mid-Holocene is analyzed. The result show the climatic changing trend in Xundian, Yunnan Province was controlled by summer solar radiation at 33°N latitude and may affected by volcanic activity during the mid-Holocene.

关 键 词：XR1石笋 中全新世 氧碳同位素 有机碳含量 古气候重建 云南寻甸 

分 类 号：P532[天文地球—古生物学与地层学]