青藏高原各拉丹冬冰芯记录的季节气温变化(英文)

编号 zgly0001586660

文献类型 期刊论文

文献题名 青藏高原各拉丹冬冰芯记录的季节气温变化(英文)

作者 张拥军  康世昌  秦大河  任贾文  张玉兰  BjornGRIGHOLM  PaulMAYEWSKI 

作者单位 InstituteofTibetanPlateauResearchCAS  InstituteofTibetanPlateauResearchCAS  KeyLaboratoryofCryosphereandEnvironmentCAREEICAS  ClimateChangeInstituteUniversityofMaineOrono  ME04469USA  Beijing100085ChinaGraduateUniversityofth 

母体文献 Journal of Geographical Sciences 

年卷期 2007年04期

年份 2007 

分类号 P423 

关键词 icecoreδ18O  summer  spring  airtemperaturevariations  Mt.Geladaindong  TibetanPlateau 

文摘内容 A 70-year history of precipitation δ18O record has been retrieved using an ice core drilled from a plat portion of the firn area in the Guoqu Glacier (33o34′37.8″ N, 91o10′35.3″ E, 5720 m a.s.l.) on Mt. Geladaindong (the source region of Yangtze River) during October and November, 2005. Based on the seasonality of δ18O records and the significant positive relationships between monsoon/non-monsoon δ18O values and summer/spring air temperature from the nearby meteorological stations, the history of summer and spring air temperature have been reconstructed for the last 70 years. The results show that both summer and spring air temperature variations present similar trends during the last 70 years. Regression analysis indicates that the slope of the temperature-δ18O relationship is 1.3℃/‰ for non-monsoon δ18O values and spring air temperature, and 0.4℃/‰ for monsoon δ18O values and summer air temperature. Variation of air temperature recorded in the ice core is consistent with that in the Northern Hemisphere (NH), however, the warming trend in the Geladaindong region is more intense than that in the NH, reflecting a higher sensitivity to global warming in the high elevation regions. In addition, warming trend is greater in spring than in summer.