利用中全新世暖期和21世纪末期的多模式气候模拟资料,对这两个时期东亚地区夏季降水变化相似型进行分析。结果表明,东亚地区中全新世与21世纪末气候变暖情景下的夏季降水变化分布型存在一定的相似性,尤其反映在两个关键区上:青藏高原南部降水变化均出现增多,增幅达到1.5 mm/d以上;新疆西南部降水变化均出现减少,减少幅度达到0.1 mm/d以上,且中全新世降水模拟变化结果与地质气候记录定性吻合。因此东亚地区全新世暖期夏季降水变化在一定程度上可作为未来夏季降水变化的历史相似型。
Combining Climate modeling results with geological climate records of mid-Holocene, we analyze the analog of summer precipitation change patterns between mid-Holocene and the late 21st century climate change scenarios over East Asia. The results show that the pattern of East Asian summer precipitation change in mid-Holocene is similar to that in the late 21st century to a certain degree. We find two key areas: one in the southern edge of the Tibetan Plateau, the other in the southwest of Xinjiang, with increased precipitation by more than 1.5mm/day and decreased precipitation up to 0.1mm/day under both warming conditions, respectively. Meanwhile, the simulated mid-Holocene precipitation is qualitatively consistent with relevant geological climate records. Therefore the pattern of East Asian summer precipitation change in mid-Holocene can be taken as a historical analog pattern for the future in the study area in some degree.
[1] IPCC.Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change[M]. Cambridge: Cambridge University Press, 2007:1-996.
[2] 刘晓东,安芷生,方建刚,等.全球气候变暖条件下黄河流域降水的可能变化[J].地理科学,2002, 22(5):513~519.
[3] 江志红,张 霞,王 冀.IPCC-AR4模式对中国21世纪气候变化的情景预估[J].地理研究,2008, 27(4):787~799.
[4] Von Deimling TS,Held H,Ganopolski A,et al.Are paleo-proxy data helpful for constraining future climate change?[J].PAGES News,2008,16:20-21.
[5] Braconnot P,Otto-Bliesner B,Harrison S,et al.Results of PMIP2 coupled simulations of the Mid-Holocene and Last Glacial Maximum - Part 1: experiments and large-scale features[J].Clim.Past, 2007, 3:261-277.
[6] 李明霞,汪永进,邱庆伦.中全新世7~6 ka东亚季风气候的高分辨率石笋记录[J]. 地理科学, 2007, 27(4):519~524.
[7] Liu X Q, Shen J, Wang S M, et al. Southwest monsoon changes indicated by oxygen isotope of ostracode shells from sediments in Qinghai Lake since the Late glacial[J]. Chinese Science Bulletin, 2007, 52:539-544.
[8] 杨永兴, 王世岩. 8.0 ka B.P.以来三江平原北部沼泽发育和古环境演变研究[J].地理科学,2003,23(1):32~38.
[9] Saijo K,Tanaka S.Paleosols of middle Holocene age in the Thakkhola basin, central Nepal, and their paleoclimatic significance[J].Journal of Asian Earth Sciences,2002,21:323-329.
[10] Tang L,Shen C,Liu K,et al.New high-resolution pollen records from two lakes in Xizang (Tibet)[J].Acta Botanica Sinica,1999,41:896-902.
[11] Kashiwaya K,Masuzawa T,Morinaga H,et al.Changes in hydrological conditions in the central Qing-Zang (Tibetan) Plateau inferred from lake bottom sediments[J].Earth and Planetary Science Letters,1995, 135:31-39.
[12] Feng Q,Su Z,Jin H.Desert evolution and climatic changes in the Tarim River basin since 12 ka B.P.[J].Science in China (Series D),1999,42(Supp):101-112.
[13] Guiot J,Wu H B,Jiang W Y,et al.East Asian Monsoon and paleoclimatic data analysis: a vegetation point of view[J].Clim,Past,2008,4:137-145.
[14] Jiang Q F,Shen J,Liu X Q,et al.A high resolution climatic change since Holocene inferred from multi-proxy of lake sediment in westerly area of China[J].Chinese Science Bulletin,2007,52:1970-1979.
[15] Phillips T J,Gleckler P J.Evaluation of continental Precipitation in 20th-Century Climate Simulations: The Utility of Multi-model Statistics[J].Water Resource Research,2006, 42:WO3202, doi:10.1029/2005WR004313.