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引用本文:贾玉连,施雅风,范云崎.四万年以来青海湖的三期高湖面及其降水量研究.湖泊科学,2000,12(3):211-218. DOI:10.18307/2000.0304
JIA Yulian,SHI Yafeng,FAN Yunqi.Water Balance of Paleolake Qinghai and Its Precipitation Estimation at Three High Lake-Level Stages since 40 kaBP. J. Lake Sci.2000,12(3):211-218. DOI:10.18307/2000.0304
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四万年以来青海湖的三期高湖面及其降水量研究
贾玉连, 施雅风, 范云崎
中国科学院南京地理与湖泊研究所, 南京210008
摘要:
孢粉学、地貌学与沉积学的证据揭示了青海湖自 4 0 ka BP以来经历了至少三期高湖面,即 30-40 ka BP,11-13ka BP,7.5-5ka BP.其中第一期与第三期的高湖面是全球性暖湿气候的产物,第二期的高湖面同暖湿气候及高山区冰川消融均有关系.根据 M.N.Bydukko(М.И.Булыко)公式和 J.E.Kutzbach公式计算年蒸发量,依据封闭流域全流域水面平衡模式,模拟了青海湖在第一期与第三期高湖面时的平均降水量分别为 645+/-5mm,595+/-15mm左右;分别比现代湖区降水量高 280 mm,235+/-15mm.从而三期高湖面的高度分别高出现代湖面 10 4 m,10 4 m和 4 5m左右.
关键词:  青海湖  古降水量  高湖面  40kaBP
DOI:10.18307/2000.0304
分类号:
基金项目:国家重点基础研究发展规划项目(G98040800)资助.
Water Balance of Paleolake Qinghai and Its Precipitation Estimation at Three High Lake-Level Stages since 40 kaBP
JIA Yulian, SHI Yafeng, FAN Yunqi
Nanjing Instituteof Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
Abstract:
Some evidences from geomorphy, pollen and sediment have shown paleolake Qinghai has undergone at least three high-level stages since 40kaBP i.e.30-40kaBP, 11-13kaBP, 7.5-5kaBP.The second high lake-level stage was relevant to ice melting and wet/warm climate, while the other two stages are relevant to the whole global wet/warm climate.Using M.N.Byduko's equation of heat and water balance, and J.E.Kutzbach's equation of energy balance to compute the ground evaporation, the hydrological and energy balance of paleo-lake Qinghai as well as the water balance model of the whole closed basin, is estimated, i.e., the paleoprecipations of paleolake Qinghai are 645+/-5mm/a during 30-40kaBP, 595+/-15 mm/a during 7.5-5kaBP, which are 280mm and 235+/-15mm higher than current precipitation in Qinghai Lake area respectively-As a result, the corresponding high lake-level stages are deduced. During 30-40kaBP, 11-13kaBP and 7.5-5kaBP in Paleolake Qinghai, the paleo-lake level might be 104m, 104m and 45m higher than current Qinghai Lake level respectively.
Key words:  Paleolake Qinghai  paleoprecipitation  three high lake-level stages  40kaBP
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