ABSTRACT. Spectra l analys is of time seri es of a c. J 7 ± 0.3 year co re, cal ibrated for to tal P act ivit y recovered from Sentik G lac ier (4908 m ) Ladak h , Him alaya , yidds seve ra l recognizahle pcri od ic ities including suba nnu a l, annual, and multi-annu a l. The tim e -seri es, includ e both c hem ica l d a ta (c hlorid e, sod ium , reactive iron, reacti\'c silica te, reactive phos phate, a mmonium , bD, b('B O ) a nd pH ) and physical data (density, debris a nd ice-ba nd locations, and micropaniclcs in size g rades 0.50 La 12.7oJlm ) .Source a reas for chem ica l species in vest iga ted a nd general air-mass c irc ulation d enned from chemi ca l a nd ph ysical tim e-se ri es are discussed to demonstrate th e potential o f such st udi es in th e developm ent of pal eome teorologica l data se ts from remo te hi gh-a lpin e g la cierized sites suc h as the Hi malaya.
IN TRODUC nONAdvances in climate prediction depend on a knowledge of historical and climatic sequences ranging in scale from seasons to millennia. Proxy data provided by glaciers can be used to construct these sequences when direct observations of the atmosphere are either spatially or temporally lacking. The glaciers of high Asia provide a unique tool for retrieving proxy data concerning atmospheric circulation because of their geography and elevation. Yet, although these glaciers comprise by area 50% of all glaciers outside of the polar regions and contain approximately 33 times the areal cover of the glaciers in the European Alps (Wissman, 1960) they are perhaps the least understood and least intensely studied glacier system in the world .The importance of glaciers as proxy indicators of climate in Asia is substantiated when one considers that the monsoonal circulation system that interacts with these glaciers is of great concern for the socioeconomic stability of the Indian subcontinent . Mukherjee and other (1981) estimate that approximately 75-90% of the annual rainfall reaching the Indian subcontinent comes during the summer monsoon and Bahadur (personal communication in 1982) suggests that as much as 25-40% of the runoff in India could come from melting glaciers. Furthermore, the Asian monsoon circulation system may even have links to the severity of snow cover over Eurasia (Hahn and Shukla, 1976) which may in turn interact through the jet stream to exert influence on the weather and climate of North
ABSTRACT. Spectra l analys is of time seri es of a c. J 7 ± 0.3 year co re, cal ibrated for to tal P act ivit y recovered from Sentik G lac ier (4908 m ) Ladak h , Him alaya , yidds seve ra l recognizahle pcri od ic ities including suba nnu a l, annual, and multi-annu a l. The tim e -seri es, includ e both c hem ica l d a ta (c hlorid e, sod ium , reactive iron, reacti\'c silica te, reactive phos phate, a mmonium , bD, b('B O ) a nd pH ) and physical data (density, debris a nd ice-ba nd locations, and micropaniclcs in size g rades 0.50 La 12.7oJlm ) .Source a reas for chem ica l species in vest iga ted a nd general air-mass c irc ulation d enned from chemi ca l a nd ph ysical tim e-se ri es are discussed to demonstrate th e potential o f such st udi es in th e developm ent of pal eome teorologica l data se ts from remo te hi gh-a lpin e g la cierized sites suc h as the Hi malaya.
IN TRODUC nONAdvances in climate prediction depend on a knowledge of historical and climatic sequences ranging in scale from seasons to millennia. Proxy data provided by glaciers can be used to construct these sequences when direct observations of the atmosphere are either spatially or temporally lacking. The glaciers of high Asia provide a unique tool for retrieving proxy data concerning atmospheric circulation because of their geography and elevation. Yet, although these glaciers comprise by area 50% of all glaciers outside of the polar regions and contain approximately 33 times the areal cover of the glaciers in the European Alps (Wissman, 1960) they are perhaps the least understood and least intensely studied glacier system in the world .The importance of glaciers as proxy indicators of climate in Asia is substantiated when one considers that the monsoonal circulation system that interacts with these glaciers is of great concern for the socioeconomic stability of the Indian subcontinent . Mukherjee and other (1981) estimate that approximately 75-90% of the annual rainfall reaching the Indian subcontinent comes during the summer monsoon and Bahadur (personal communication in 1982) suggests that as much as 25-40% of the runoff in India could come from melting glaciers. Furthermore, the Asian monsoon circulation system may even have links to the severity of snow cover over Eurasia (Hahn and Shukla, 1976) which may in turn interact through the jet stream to exert influence on the weather and climate of North
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