典型文献
Paleo-glacial reconstruction of the Thajwas glacier in the Kashmir Himalaya using 10Be cosmogenic radionuclide dating
文献摘要:
Quantitative glacial chronologies of past glaciations are sparse in the Himalaya,and mostly absent in the Kashmir Himalaya.We used cosmogenic 10Be exposure dating,and geomorphological mapping to recon-struct glacial advances of the Thajwas Glacier(TG)in the Great Himalayan Range of the Kashmir Himalaya.From 10Be exposure dating of ten moraine boulders,four glacial stages with ages~20.77±2.28 ka,~11.46±1.69 ka,~9.12±1.39 ka and~4.19±0.78 ka,were identified.The reconstructed cos-mogenic radionuclide ages confirmed the global Last Glacial Maximum(gLGM),Younger Dryas,Early Holocene,and Neoglaciation episodes.As per area and volume change analyses,the TG has lost 51.1 km2 of its area and a volume of 2.64 km3 during the last 20.77±2.28 ka.Overall,the results sug-gested that the TG has lost 64%of area and 73%of volume from the Last glacial maximum to Neoglaciation and about 85.74%and 87.67%of area and volume,respectively,from Neoglaciation to the present day.The equilibrium line altitude of the TG fluctuated from 4238 m a.s.l present to 3365 m a.s.l during the gLGM(20.77±2.28 ka).The significant cooling induced by a drop in mean ambi-ent temperature resulted in a positive mass balance of the TG during the gLGM.Subsequently the melting accelerated due to the continuing rise of the global ambient temperature.Paleo-glacial history recon-struction of the Kashmir Himalaya,with its specific geomorphic and climatic setting,would help close the information gap about the chronology of past regional glacial episodes.
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作者姓名:
Omar Jaan Paul;Shakil Ahmad Romshoo;Reyaz Ahmad Dar;Pankaj Kumar;Soumya Prakash Dhal;Sundeep Chopra
作者机构:
Department of Earth Sciences,University of Kashmir,Srinagar,India;Islamic University of Science and Technology(IUST),Kashmir,India;Inter-University Accelerator Centre(IUAC),New Delhi,India;Department of Geoinformatics,University of Kashmir,Srinagar,India
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引用格式:
[1]Omar Jaan Paul;Shakil Ahmad Romshoo;Reyaz Ahmad Dar;Pankaj Kumar;Soumya Prakash Dhal;Sundeep Chopra-.Paleo-glacial reconstruction of the Thajwas glacier in the Kashmir Himalaya using 10Be cosmogenic radionuclide dating)[J].地学前缘(英文版),2022(06):30-40
A类:
Thajwas,chronologies,mogenic,gLGM,Neoglaciation
B类:
Paleo,glacial,reconstruction,glacier,Kashmir,using,10Be,cosmogenic,radionuclide,dating,Quantitative,past,glaciations,sparse,mostly,absent,We,used,exposure,geomorphological,mapping,advances,Glacier,Great,Himalayan,Range,From,ten,moraine,boulders,four,stages,ka,were,identified,reconstructed,confirmed,global,Last,Glacial,Maximum,Younger,Dryas,Early,Holocene,episodes,area,volume,change,analyses,has,lost,km2,its,km3,during,last,Overall,results,sug,gested,that,from,maximum,about,respectively,present,day,equilibrium,line,altitude,fluctuated,significant,cooling,induced,by,drop,mean,temperature,resulted,positive,mass,balance,Subsequently,melting,accelerated,due,continuing,rise,ambient,history,specific,geomorphic,climatic,setting,would,help,close,information,gap,chronology,regional
AB值:
0.475143
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