Rectification Feedback of High-Frequency Atmospheric Variability into Low-Frequency Zonal Flows in the Tropical Pacific SCIE SCOPUS

Cited 1 time in WEB OF SCIENCE Cited 1 time in Scopus
Title
Rectification Feedback of High-Frequency Atmospheric Variability into Low-Frequency Zonal Flows in the Tropical Pacific
Author(s)
Ham, Yoo-Geun; Kug, Jong-Seong; Lim, Mi-Jung
Publication Year
2012-07-15
Abstract
In this study, the rectification process of high-frequency (HF) zonal-wind variability on the low-frequency (LF) zonal wind is investigated through an idealized experiment using an atmospheric general circulation model (AGCM). Through an idealized AGCM experiment with a fixed SST boundary forcing, it is shown that there is positive (negative) correlation between HF (2-90-day period) zonal-wind variance and LF (3-month average) zonal wind where the HF zonal-wind variance is positively (negatively) skewed because the stronger HF westerly (easterly) wind events than HF easterly (westerly) wind events induce a residual westerly (easterly), and it results in an additional rectified LF westerly (easterly) anomaly. This means that, over regions with positively skewed HF zonal winds, LF westerly anomalies are generated due to the residuals of the HF zonal winds. It implies that the LF zonal wind can be generated through internal processes of the atmosphere without external forcing and the interaction between LF and HF is not a one-way process from LF to HF but, rather, a two-way interaction process.
ISSN
0894-8755
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3572
DOI
10.1175/JCLI-D-11-00303.1
Bibliographic Citation
JOURNAL OF CLIMATE, v.25, no.14, pp.5088 - 5101, 2012
Publisher
AMER METEOROLOGICAL SOC
Subject
WESTERLY WIND BURSTS; MADDEN-JULIAN OSCILLATION; GENERAL-CIRCULATION MODEL; SEA-SURFACE TEMPERATURE; EL-NINO EVENTS; SYNOPTIC-SCALE DISTURBANCES; INTRASEASONAL VARIABILITY; EQUATORIAL PACIFIC; COUPLED GCM; GLOBAL PRECIPITATION
Keywords
El Nino; ENSO; Madden-Julian oscillation
Type
Article
Language
English
Document Type
Article
Publisher
AMER METEOROLOGICAL SOC
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