KOPRI Repository

ARCTIC OSCILLATION AND COLD SURGE CHARACTERISTICS IN THE NORTHERN HEMISPHERE AT 2009/2010 WINTER

Metadata Downloads
Title
ARCTIC OSCILLATION AND COLD SURGE CHARACTERISTICS IN THE NORTHERN HEMISPHERE AT 2009/2010 WINTER
Other Titles
2009/2010년 북반구 겨울철 한파와 북극진동의 관계
Authors
Kim, Seong-Joong
Kim, Baek-Min
Kim, Yoojin
Woo, Sung-Ho
Lee, Hyun-Ha
Keywords
Arctic; Arctic Oscillation; Cold Surge; Siberia Snow; Wave Activity
Issue Date
2011
Citation
Kim, Seong-Joong, et al. 2011. ARCTIC OSCILLATION AND COLD SURGE CHARACTERISTICS IN THE NORTHERN HEMISPHERE AT 2009/2010 WINTER. 기상학회. 기상학회. 2011.12.01~.
Abstract
The cause of the cold surge occurred at 2009/2010 winter over northern hemisphere was investigated. During the boreal winter (December-January-February) of 2009/2010, the surface temperature was extremely lower than normal years by more than 5°C over North- east Asia, Europe, and North America. The cold air outbreak was due to the stronger northerly winds in troposphere at mid latitudes associated with the substantially weaker Arctic Oscillation (AO) polarity, which leads to the weaker zonal-mean zonal winds and higher geopotential height and associated marked warming anomalies at high northern latitudes, whose signals propagated from the mid-latitude stratosphere at autumn down to troposphere at winter. The marked stratospheric warm anomaly in autumn is produced by the stronger upward propagation of the stationary planetary waves which lead to the weaker znoal-mean zonal winds. Analyses indicate that the stronger wave activity is originated from Eurasia/Siberia associated with the anomalously larger snow cover during October and November. The autumn snow cover over these regions tends to increase with time and its increasing rate is becoming larger towards present in concert with the global warming. This result indicates that the anomalously increased autumn snow cover over Siberia in part led to the weakening of the AO polarity and consequent cold air outbreak for the 2009/2010 winte
URI
http://repository.kopri.re.kr/handle/201206/8486
Conference Name
기상학회
Conference Place
기상학회
Conference Date
2011.12.01~
Files in This Item
There are no files associated with this item.
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse