Journal
CLIMATE DYNAMICS
Volume 53, Issue 7-8, Pages 3971-3983Publisher
SPRINGER
DOI: 10.1007/s00382-019-04764-7
Keywords
Linkage; Arctic warming; Siberian high; Interdecadal change; Internal variability
Categories
Funding
- National Key R&D Program of China [2016YFA0600703]
- UTFORSK Partnership Program [UTF-2016-long-term/10030]
- Research Council of Norway [244166/E10, 260393]
- National Natural Science Foundation of China [41875118, 41505073, 41605059, 41421004, 41790472]
- Young Talent Support Program, China Association for Science and Technology [2016QNRC001]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18_0997]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- Jiangsu innovation and entrepreneurship team
Ask authors/readers for more resources
Early studies have suggested a linkage between the surface warming over the Barents-Kara Seas and the strength of the Siberian high in boreal winter. Here, we show that the linkage is not stable, and with an apparent interdecadal change in the late-1990s. Coinciding with Arctic surface warm anomalies in recent decades (1997-2017), the Siberian high has been significantly intensified, the East Asian jet stream has expanded westward, and an apparent Rossby wave has propagated from the Arctic to East Asia, suggesting an atmospheric teleconnection between midlatitudes and Arctic. In contrast, midlatitude atmospheric circulation anomalies coinciding with Arctic surface warm anomalies were barely statistically significant during 1979-1996. The associated strong anomalous ascending/descending motions and divergent/convergent upper troposphere air masses over the Arctic-Eurasian sector seem to have favored the midlatitude-Arctic linkage during 1997-2017. We further hypothesize that Arctic mid-tropospheric warming plays a crucial role for the linkage between midlatitudes and Arctic in boreal winter. Multi-model simulations support this, and also point to internal atmospheric variability as the cause for the interdecadal shift in the strength of the midlatitude-Arctic linkage.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available