Abstract
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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