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Hydrological variations on the Central Tibetan Plateau since the Last Glacial Maximum and their teleconnection to inter‐regional and hemispheric climate variations
Author(s) -
KASPER THOMAS,
HABERZETTL TORSTEN,
WANG JUNBO,
DAUT GERHARD,
DOBERSCHÜtz STEFAN,
ZHU LIPING,
MÄUSBACHER ROLAND
Publication year - 2015
Publication title -
journal of quaternary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.142
H-Index - 94
eISSN - 1099-1417
pISSN - 0267-8179
DOI - 10.1002/jqs.2759
Subject(s) - younger dryas , teleconnection , glacial period , plateau (mathematics) , northern hemisphere , holocene , climatology , geology , monsoon , glacier , last glacial maximum , climate change , productivity , physical geography , oceanography , el niño southern oscillation , geography , geomorphology , mathematical analysis , mathematics , economics , macroeconomics
Decadal to sub‐decadal variability of inflow, evaporation and biological productivity derived from Lake Nam Co was used to reconstruct hydrological changes for the past ca. 24 k cal a BP. The timing of these variations corresponds to known climatic shifts on the Northern Hemisphere. After a dry and cold Last Glacial Maximum the lake level of Nam Co initially rose at ca. 20 k cal a BP. Moist but further cold conditions between ca. 16.2 and 14 k cal a BP correspond to Heinrich Event 1. A warm and moist phase between ca. 14 and 13 k cal a BP is expressed as a massive enhancement in inflow and biological productivity and might be associated with a first intensification of the Indian Ocean Summer Monsoon coinciding with the Bølling–Allerød complex. A two‐step decrease in inflow and a contemporaneous decline in biological productivity until ca. 11.8 k cal a BP points to cool and dry conditions during the Younger Dryas. Lake levels peak at ca. 9.4 k cal a BP, although hydrological conditions remain relatively stable during the Holocene with only low‐amplitude variations observed.