Connection between weak stratospheric vortex events and the Pacific Decadal Oscillation

Verfasser / Beitragende:
[Sung-Ho Woo, Mi-Kyung Sung, Seok-Woo Son, Jong-Seong Kug]
Ort, Verlag, Jahr:
2015
Enthalten in:
Climate Dynamics, 45/11-12(2015-12-01), 3481-3492
Format:
Artikel (online)
ID: 605472637
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024 7 0 |a 10.1007/s00382-015-2551-z  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00382-015-2551-z 
245 0 0 |a Connection between weak stratospheric vortex events and the Pacific Decadal Oscillation  |h [Elektronische Daten]  |c [Sung-Ho Woo, Mi-Kyung Sung, Seok-Woo Son, Jong-Seong Kug] 
520 3 |a We investigate the possible impacts of the Pacific Decadal Oscillation (PDO) on the occurrence of weak stratospheric polar vortex (WSV) events in the Northern Hemisphere winter. WSV events, which are defined when polar-cap geopotential height anomalies at 50hPa fall below the 10th percentile in winter, are observed more frequently during positive PDO phases than during negative PDO phases. Additionally, tropospheric wave forcings that drive WSV events are remarkably different between the two phases of the PDO. During the positive PDO phase, the vertical propagation of wavenumber-one waves plays a predominant role with a rather minor contribution of wavenumber-two waves. This contrasts with the negative PDO phase when the WSV events are primarily caused by wavenumber-two waves. This difference is partly related to the PDO-induced tropospheric circulation anomalies over the North Pacific whose zonal wavenumber-one component constructively (destructively) interferes with climatological planetary-scale waves during positive (negative) PDO winters. The predominant wavenumber-two wave forcings during the negative PDO phase are likely related to the enhanced tropospheric eddy activity over Alaska that results from the poleward shift of the Pacific jet in response to the negative PDO. 
540 |a Springer-Verlag Berlin Heidelberg, 2015 
690 7 |a PDO  |2 nationallicence 
690 7 |a Weak stratospheric vortex events  |2 nationallicence 
690 7 |a Troposphere-stratosphere interaction  |2 nationallicence 
700 1 |a Woo  |D Sung-Ho  |u School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), 790-784, Pohang, Gyungbuk, South Korea  |4 aut 
700 1 |a Sung  |D Mi-Kyung  |u Division of Climate Change, Korea Polar Research Institute, Incheon, South Korea  |4 aut 
700 1 |a Son  |D Seok-Woo  |u School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea  |4 aut 
700 1 |a Kug  |D Jong-Seong  |u School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), 790-784, Pohang, Gyungbuk, South Korea  |4 aut 
773 0 |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 45/11-12(2015-12-01), 3481-3492  |x 0930-7575  |q 45:11-12<3481  |1 2015  |2 45  |o 382 
856 4 0 |u https://doi.org/10.1007/s00382-015-2551-z  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s00382-015-2551-z  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Woo  |D Sung-Ho  |u School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), 790-784, Pohang, Gyungbuk, South Korea  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Sung  |D Mi-Kyung  |u Division of Climate Change, Korea Polar Research Institute, Incheon, South Korea  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Son  |D Seok-Woo  |u School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Kug  |D Jong-Seong  |u School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), 790-784, Pohang, Gyungbuk, South Korea  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 45/11-12(2015-12-01), 3481-3492  |x 0930-7575  |q 45:11-12<3481  |1 2015  |2 45  |o 382