Possible orographic and solar controls of Late Holocene centennial-scale moisture oscillations in the northeastern Tibetan Plateau

Details Possible orographic and solar controls of Late Holocene centennial-scale moisture oscillations in the northeastern Tibetan Plateau Possible orographic and solar controls of Late Holocene centennial-scale moisture oscillations in the northeastern Tibetan Plateau

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3621705z&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 21, CiteID L21705

Physics

1

Atmospheric Processes: Paleoclimatology (0473, 4900), Global Change: Regional Climate Change, Global Change: Climate Dynamics (0429, 3309), Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513)

Scientific paper

We present a record of lake-level changes from Hurleg Lake, a freshwater lake in the arid Qaidam Basin on the NE Tibetan Plateau, an area with few high-resolution paleoclimate records. The carbonate percentage and ostracode abundance show a consistent pattern with ˜200-year moisture oscillations during the last 1000 years. The moisture pattern in the Qaidam Basin is in opposite relation to tree-ring-based monsoon precipitations in the surrounding mountains, suggesting that topography may be important in controlling regional moisture patterns as mediated by rising and subsiding air masses in this topographically-complex region. Cross-spectral analysis between our moisture proxies and solar activity proxy shows high coherence at the ˜200-year periodicity which is similar to Chinese monsoon intensity records, implying the possible solar forcing of moisture oscillations in the NE Tibetan Plateau.

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