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Low‐frequency of southern Asian monsoon variability using a 295‐year record from the Dasuopu ice core in the central Himalayas
Author(s) -
Duan Keqin,
Yao Tandong,
Thompson L. G.
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl020015
Subject(s) - monsoon , centennial , climatology , precipitation , monsoon of south asia , ice core , east asian monsoon , period (music) , snow , geology , physical geography , geography , meteorology , archaeology , geomorphology , physics , acoustics
A better understanding of the spatial and temporal variability of rainfall in the Himalayas should be extremely important to improve our understanding of Asian monsoon dynamics. There is little that is understood about rainfall variability at the high Himalayas with elevation over 7000 m a.s.l. Here a high‐resolution snow accumulation record from a well dated Dasuopu ice core from central Himalayas reflects low‐frequency variability of monsoon precipitation over the last 295‐year. MultiDecadal to centennial variations in the Dasuopu snow accumulation (DSA) are in‐phase (out‐of‐phase) with that in monsoon rainfall of northeast Indian, Nepal and Bangladesh (southern India) over the period 1901–1995. The record shows the monsoon in central Himalayas had weakened in 18th century and strengthened throughout much of 19th and early 20th century, and then weakening again from early 1920s to the present.