Changes in occurrence of cold surges over east Asia in association with Arctic Oscillation
Jee-Hoon Jeong,Chang-Hoi Ho +1 more
Reads0
Chats0
TLDR
In this article, the occurrence of cold surges in east Asia is significantly influenced by the Arctic Oscillation (AO), and the events of cold surge are objectively determined based on several synoptic criteria and the phase-dependency of its occurrences in association with the AO has been revealed.Abstract:
[1] It has been newly found that the occurrence of cold surges in east Asia is significantly influenced by the Arctic Oscillation (AO). In the present study, the events of cold surge are objectively determined based on several synoptic criteria and the phase-dependency of its occurrences in association with the AO has been revealed. During the negative AO phase, the frequency of cold surge occurrence is relatively increased than that of neutral and positive AO phases. The variation of upper level trough and jet stream over east Asia and the Siberian High in association of AO are suggested to explain the change of cold surge occurrences.read more
Citations
More filters
Journal ArticleDOI
Detection of atmospheric rivers: Evaluation and application of an algorithm for global studies
TL;DR: In this paper, a technique is developed for objective detection of atmospheric rivers on the global domain based on characteristics of the integrated water vapor transport (IVT), which involves thresholding 6-hourly fields of ERA-Interim IVT based on the 85th percentile specific to each season and grid cell and checking for the geometry requirements of length >2000 km, length/width ratio >2, and other considerations indicative of AR conditions.
Journal ArticleDOI
The Melting Arctic and Midlatitude Weather Patterns: Are They Connected?*
TL;DR: The potential of recent Arctic changes to influence hemispheric weather is a complex and controversial topic with considerable uncertainty, as time series of potential linkages are short (<10 yr) and understanding involves the relative contribution of direct forcing by Arctic changes on a chaotic climatic system as discussed by the authors.
Journal ArticleDOI
Synoptic-Scale Controls of Persistent Low Temperature and Icy Weather over Southern China in January 2008
TL;DR: In this paper, the authors examined the large-scale conditions associated with the occurrence and development of these snowstorms and identified the key synoptic controls leading to this event, including the persistent blocking high over Siberia, which remained quasi-stationary around 65°E for 3 weeks, led to advection of dry and cold Siberian air down to central and southern China.
Journal ArticleDOI
Relationship between the Arctic Oscillation and Cold Surges over East Asia
TL;DR: In this article, the authors reveal the changes in the characteristics of cold surges over East Asia associated with the Arctic Oscillation (AO), based on circulation features, cold surges are grouped into two general types: wave train and blocking types.
Journal ArticleDOI
The association between stratospheric weak polar vortex events and cold air outbreaks in the Northern Hemisphere
TL;DR: In this paper, the authors show that the development of the lower-tropospheric temperature relative to stratospheric weak polar vortex events goes through a series of well-defined stages, including the formation of geographically distinct cold air outbreaks.
References
More filters
Journal ArticleDOI
The NCEP/NCAR 40-Year Reanalysis Project
Eugenia Kalnay,Masao Kanamitsu,Robert Kistler,William D. Collins,D.G. Deaven,L. S. Gandin,M. Iredell,Suranjana Saha,Glenn H. White,John S. Woollen,Yuejian Zhu,Muthuvel Chelliah,Wesley Ebisuzaki,Wayne Higgins,John E. Janowiak,Kingtse C. Mo,Chester F. Ropelewski,Julian X. L. Wang,Ants Leetmaa,Richard W. Reynolds,Roy L. Jenne,Dennis Joseph +21 more
TL;DR: The NCEP/NCAR 40-yr reanalysis uses a frozen state-of-the-art global data assimilation system and a database as complete as possible, except that the horizontal resolution is T62 (about 210 km) as discussed by the authors.
Journal ArticleDOI
The Arctic oscillation signature in the wintertime geopotential height and temperature fields
TL;DR: The Arctic Oscillation (AO) as mentioned in this paper is the signature of modulations in the strength of the polar vortex aloft, and it resembles the NAO in many respects; but its primary center of action covers more of the Arctic, giving it a more zonally symmetric appearance.
Journal ArticleDOI
Annular Modes in the Extratropical Circulation. Part I: Month-to-Month Variability*
TL;DR: In this article, the authors compared the structure and seasonality of the Southern Hemisphere (SH) annular mode and the Northern Hemisphere (NH) mode, referred to as the Arctic Oscillation (AO), based on data from the National Centers for Environmental Prediction and National Center for Atmospheric Research reanalysis and supplementary datasets.
Journal ArticleDOI
Description of Global-Scale Circulation Cells in the Tropics with a 40–50 Day Period
Roland A. Madden,Paul R. Julian +1 more
TL;DR: In this article, a long time series (5-10 years) of station pressure and upper air data from stations located in the tropics are subjected to spectral and cross-spectral analysis to investigate the spatial extent of a previously detected oscillation in various variables with a period range of 40-50 days.
Journal ArticleDOI
Annular Modes in the Extratropical Circulation. Part II: Trends
TL;DR: In this paper, the authors exploit the remarkable similarity between recent climate trends and the structure of the "annular modes" in the month-to-month variability (as described in a companion paper) to partition the trends into components linearly congruent with and linearly independent of the annular modes.
Related Papers (5)
The Arctic oscillation signature in the wintertime geopotential height and temperature fields
The NCEP/NCAR 40-Year Reanalysis Project
Eugenia Kalnay,Masao Kanamitsu,Robert Kistler,William D. Collins,D.G. Deaven,L. S. Gandin,M. Iredell,Suranjana Saha,Glenn H. White,John S. Woollen,Yuejian Zhu,Muthuvel Chelliah,Wesley Ebisuzaki,Wayne Higgins,John E. Janowiak,Kingtse C. Mo,Chester F. Ropelewski,Julian X. L. Wang,Ants Leetmaa,Richard W. Reynolds,Roy L. Jenne,Dennis Joseph +21 more