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Main Title: Prominent Midlatitude Circulation Signature in High Asia's Surface Climate During Monsoon
Author(s): Mölg, Thomas
Maussion, Fabien
Collier, Emily
Chiang, John H. C.
Scherer, Dieter
Type: Article
Language Code: en
Abstract: High Asia has experienced strong environmental changes in recent decades, as evident in records of glaciers, lakes, tree rings, and vegetation. The multiscale understanding of the climatic drivers, however, is still incomplete. In particular, few systematic assessments have evaluated to what degree, if at all, the midlatitude westerly circulation modifies local surface climates in the reach of the Indian Summer Monsoon. This paper shows that a southward shift of the upper‐tropospheric westerlies contributes significantly to climate variability in the core monsoon season (July–September) by two prominent dipole patterns at the surface: cooling in the west of High Asia contrasts with warming in the east, while moist anomalies in the east and northwest occur with drying along the southwestern margins. Circulation anomalies help to understand the dipoles and coincide with shifts in both the westerly wave train and the South Asian High, which imprint on air mass advection and local energy budgets. The relation of the variabilities to a well‐established index of midlatitude climate dynamics allows future research on climate proxies to include a fresh hypothesis for the interpretation of environmental changes.
Issue Date: 18-Nov-2017
Date Available: 12-Dec-2019
DDC Class: 550 Geowissenschaften
Subject(s): climate variability
High Asia
climate proxy data
Journal Title: Journal of geophysical research : Atmospheres
Publisher: American Geophysical Union (AGU)
Publisher Place: Hoboken, NJ
Volume: 122
Issue: 23
Publisher DOI: 10.1002/2017JD027414
Page Start: 12,702
Page End: 12,712
EISSN: 2169-8996
ISSN: 2169-897X
Notes: ©2017. American Geophysical Union
Appears in Collections:FG Klimatologie » Publications

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