Paleoprecipitation Reconstruction during the Interstadial of the Last Glacial ( 40222 ka BP) in Huangqihai Lake, Inner Mongolia
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摘要: 末次冰期间冰阶(40～22kaBP),黄旗海最高古湖面稳定在1310～1318m之间,比现代湖面约高50m,湖泊面积达到450～515km2(平均为466km2),是现代湖面101km2(1950～1961年平均值)的4.4～5.1倍,湖泊补给系数7.8～9.1。利用逐次逼近法寻找古流域的现代气候相似区域,从而确定相关参数定量重建古降水量;在此基础上,附加另外两个过程,检验了重建结果的可靠性。重建结果认为:40～22kaBP古湖面稳定存在时,黄旗海流域的古降水量可达479～497mm/a,比现在年平均值(353mm/a)高约126～144mm/a。Abstract: In monsoon area of eastern Asia, the interstadial of the Last Glacial, that is M IS3a or 40-22 kaBP, was a warm and wet stage. There was probably more precipitation at this interval than the present in South-east Monsoon are-a. In the Tibetan plateau there were more precipitation during 40-22 kaBP than the MegathermalMaximum in the Hol-ocene reconstructed with hydrological and energy balance of closed lake basin. Evidence from gravel-sand bars around lakes shows that HuangqihaiLake have experienced high-level stage during 40-22 kaBP. These gravel-sand bars are mainly found at the foot of mountain, Libaisi northern hill and Gu hill,such as. At the Libaisi northern hill, the sand-bar, with a. s. l 1310-1318 m, covered by stripe-like meadow, was dated 24.43～2.33 ka BP by OSL method. This paper calculated palaeo-precip itation of this stage in Huangqihai basin, in order to analyze the difference of precipitation in the monsoon area of eastern Asia and the Tibetan plateau. Based on the modern relief map, if the high lake level stand on the 1310-1318 m, 50 m higher than the present, Huangqihai Paleolake had an area of 450～515 km2 ( average 466 km2), 4.4-5.1 times of that of the present (1950-1961A. D). Using J. E. Kutzbach's equation of energy balance to compute the land evaporation and water surface evaporation with step-after-step app roachingmethod to obtain the parameters, we modeled the combined hydrological and energy balance of Huangqihai basin, and the following estimates of precip itation were yielded: 479-497mm / a during 40-22 ka BP, higher 126-144 mm / a than the present. But we do not think the precipitation is more than that of the highest lake level stage in Holocene. The p recip itation, however, in the Tibetan Plateau, was higher at 40-24 kaBP than at 1424.0 ka BP. Certainly, the reestablished palaeo-precipitation, is only when the high lake level stand at a. s. l 1310-1318 m during some stage of 40-22 ka BP, not that of stage of 40-22 ka BP when lake level was lower than 1310-1318 m.
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[1] 1 刘东生,安芷生,陈明扬. 最近0.6Ma南、北半球古气候对比初探[J].中国科学D辑,1996,(02):97-102.
2 Shi Y F,Yu G,Liu X D,Li B Y. Reconstruction of the 40-30 kaBP enhanced India Monsoon climate based on geological records from the Tibetan Plateau[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2001.69-83.
3 贾玉连,施雅风,马春梅. 40 kaBP以来亚非大陆三支季风演化趋势的差异性分析及青藏高原泛湖期[J].地理学报,2004,(06):829-840.
4 施雅风,孔昭宸,王苏民. 中国全新世大暖期气候与环境的基本特征[A].北京:海洋出版社,1992.1-18.
5 马春梅,贾玉连,魏灵. 青藏高原40～28 kaBP是否存在远高于全新世大暖期的降水量[M].
6 江德昕,杨惠秋. 青海达布逊湖50万年以来气候变化的孢粉学证据[J].沉积学报,2001,(01):101-106.
7 王苏民,余源盛,吴瑞金. 岱海-湖泊环境与气候变化[M].合肥:中国科学技术大学出版社,1990. 117-186.
8 An Z S,Kukla G J,Porter S C. Magnetic susceptibility evidence of monsoon variation on the Loess Plateau[J].Quaternary Research,1991,(01):29-36.
9 李吉均,朱俊杰,康建成. 末次冰期旋回兰州黄土剖面与南极东方站冰芯的对比[J].中国科学B辑,1990.1086-1094.
10 Chen F H,Bloemendal J,Wang J M,Li J J. High - resolution multi-proxy climate records from Chinese loess:evidence for rapid climatic changes over the last 75kyr[J].Palaeogeography Palaeoclimatology Palaeoecology,1997.323-335.
11 鹿化煜,马海州,谭红兵. 西宁黄土堆积记录的最近13万年高原气候变化[J].第四纪研究,2001,(05):416-426.
12 李栓科,王涛. 全新世内蒙南缘黄旗海湖面的波动[J].湖泊科学,1993,(04):324-334.
13 施雅风,刘晓东,李炳元. 距今40～30ka青藏高原特强夏季风事件及其与岁差周期关系[J].Chinese Science Bulletin, 1999,(14):1475-1480.
14 Kutzbach J E. Estimates of past climate at paleolake Chad,North Africa,based on a hydrological and energy-balance model[J].Quaternary Research,1980.210-223.
15 王苏民,窦鸿身. 中国湖泊志[M].北京:科学出版社,1998.301-341.
16 Berger A. Milankovitch theory and climate[J].Reviews of Geophysics,1988,(04):624-655.
17 Berger A. Long-term variations of caloric resulting from the Earth' s orbital elements[J].Quaternary Research,1978.139-167.
18 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[J].湖泊科学,2000,(03):211-218.
19 贾玉连,施雅风,范云崎. 水能联合方程恢复流域古降水量时参数的确定方法及其应用-以青海湖全新世大暖期古降水量推算为例[J].水科学进展,2001,(03):324-330.
20 王苏民,冯敏. 内蒙古岱海湖泊环境变化与东南季风强弱的关系[J].中国科学B辑,1991,(07):756-768.
21 徐祝龄. 气象学[M].北京:气象出版社,1994.202-212.
22 中国气象局. 中国气候资源地图集[M].北京:中国地图出版社,1994.1-213.
23 中国地图出版社. 中国自然地理图集[M].北京:中国地图出版社,1998.35-125.
24 Sellers W D. Physical Climatology[M].Chicago:University of Chicago Press,1965.92-106.
25 Hastenrath S,Kutzbach J E. Paleoclimatic estimates from water and energy budgets of east African Lakes[J]. Quaternary Research,1983.141-153.
26 Hastenrath S,Kutzbach J E. Late Pleistocene climate and water budget of the south American Altiplano[J].Quaternary Research,1985.249-256.
27 宋长青,吕厚远,孙湘君. 中国北方花粉-气候因子转换函数建立及其应用[J].Chinese Science Bulletin, 1997,(20):2182-2186.
28 范云崎. 西藏内陆湖泊补给系数的初步探讨[J].海洋与湖沼,1983,(02): 118-127.
29 许清海,肖举乐,中村俊夫. 孢粉资料定量重建全新世以来岱海盆地的古气候[J].海洋地质与第四纪地质,2003,(04):99-108. -
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