March–May Snow Cover Extent Reconstruction for the Past Four Centuries Based on the Tree-Ring Early-Wood on the Southeastern Tibetan Plateau

The snow cover extent (SCE) on the southeastern Tibet Plateau (SETP) has an important impact dynamics of East Asian winter monsoon and runoff changes first third largest rivers in Asia, namely, Yangtze River Yarlung Zangbo River. Unfortunately, shortness instrumental SCE data a few decades limits our ability to understand its long-term variability before industrial era. Here, we developed Abies faxoniana tree-ring total ring width (TRW), early-wood (EWW), late-wood (LWW) chronologies for past four centuries at Little Qamdo Village (XQDV), Markam County, SETP. most significant positive correlation ( r = 0.62, p < 0.01) was found between EWW chronology from March May (SCE 3–5 ). would affect onset growing season through soil moisture, restricting growth trees. Thus, presented reconstruction via since AD 1660 We observed two abrupt low high around years 1685 1998 reconstructed . In addition, that anomalies after 1988 cohered with distinct increase monsoon.