CAJ | 학술논문

依据封闭流域全流域水量平衡模式，模拟了青藏高原西南部3个封闭流域在40～30 ka BP期间，高湖面稳定存在时期的古水量平衡，重建了各流域的古降水量。结果表明色林错－纳木错流域、扎布耶－拉果错流域、扎仓茶卡－别苦则错流域当时的降水量分别约为585±25 mm、565±25 mm、475±25 mm，相当于现在降水量的1.7、3.1、4.8倍。
의거봉폐류역전류역수량평형모식，모의료청장고원서남부3개봉폐류역재40～30 ka BP기간，고호면은정존재시기적고수량평형，중건료각류역적고강수량。결과표명색림착－납목착류역、찰포야－랍과착류역、찰창다잡－별고칙착류역당시적강수량분별약위585±25 mm、565±25 mm、475±25 mm，상당우현재강수량적1.7、3.1、4.8배。
Geomorphic evidence from several closed-lake basins in Tibetan Plateau indicates that the plateau experienced high lake levels during some episode of the period of 40～30 ka BP,and lakes covered an area of about several or tens times as large as at present.Using the equation of hydrologic and energy balance and the multiapproach method to estimate climate parameters such as albedo,cloudiness and vapor press,to calculate the evaporation,simulating the combined hydrologic and energy balance of Zhacang Caka,Seling-Namu Cuo,Zhabuye Caka paleolakes with the water balance model of the whole closed basin,respectively,yield the estimates of 475±25 mm/a,585±25 mm/a,565±25 mm/a of annual precipitation during 40～30 ka BP at high lake levels period,the estimates of annual evaporation from lake surfaces 1 126 mm/a,1 044 mm/a and 1 071 mm/a,and from land basins 384 mm/a,423 mm/a,422 mm/a,respectively.The amount of increased precipitation at that time must have been about 300 mm/a(71 to 380%) above the modern average.The pattern of precipitation,like the present,is larger in the east part than in the west part of the Tibetan Plateau,which shows the precipitation was triggered by Indian monsoon like the present,but Indian monsoon was far stronger than today.