Microparticle record in the Guliya ice core and its comparison with polar records since the last interglacial  

作　　者：WUGuangjian YAOTandong L.G.Thompson LIZhongqin 

机构地区：[1]KeyLaboratoryofIceCoreandColdRegionsEnvironment,CAREERI,ChineseAcademyofSciences,Lanzhou730000,China [2]ByrdPolarResearchCenter,DepartmentofGeologicalSciences.OhioStateUniversity,Columbus,OH43210,USA

出　　处：《Chinese Science Bulletin》2004年第6期607-611,共5页

摘　　要：Based on the study of oxygen isotope and mi-croparticle in the Guliya ice core, atmospheric dust and en-vironmental changes in the northwest Tibetan Plateau since the last interglacial were revealed. The microparticle record indicates that low dust load on the Plateau in the interglacial. Particle concentration increased rapidly when the climate turned into the last glacial and reached the maximum during the MIS 4. In the Last Glacial Maximum, however, the en-hancement of microparticle concentration was slight, differ-ing to those in the Antarctic and Greenland. On the orbital timescale, both the temperature on the Tibetan Plateau and summer solar insolation in the Northern Hemisphere had their impact on the microparticle record, but the difference in phase and amplitude also existed. Though having the same dust source, microparticle records in the ice cores on the Tibetan Plateau and the Greenland seem to have different significance.Based on the study of oxygen isotope and mi-croparticle in the Guliya ice core, atmospheric dust and en-vironmental changes in the northwest Tibetan Plateau since the last interglacial were revealed. The microparticle record indicates that low dust load on the Plateau in the interglacial. Particle concentration increased rapidly when the climate turned into the last glacial and reached the maximum during the MIS 4. In the Last Glacial Maximum, however, the en-hancement of microparticle concentration was slight, differ-ing to those in the Antarctic and Greenland. On the orbital timescale, both the temperature on the Tibetan Plateau and summer solar insolation in the Northern Hemisphere had their impact on the microparticle record, but the difference in phase and amplitude also existed. Though having the same dust source, microparticle records in the ice cores on the Tibetan Plateau and the Greenland seem to have different significance.

关 键 词：微粒子记录 Guliya冰核 极性记录 末期间冰期 西藏高原 大气灰尘 全球气候 

分 类 号：P461[天文地球—大气科学及气象学]