Effect of SST in the Northwest Indian Ocean on Synoptic Eddies over the South China Sea-Philippine Sea in June
Open Access
- 9 December 2022
- journal article
- research article
- Published by MDPI AG in Atmosphere
- Vol. 13 (12), 2073
- https://doi.org/10.3390/atmos13122073
Abstract
Synoptic eddies (with a period of two to eight days) are active in the South China Sea-Philippine Sea (SCS-PS) and control weather variations. In addition, the intensity and frequency of synoptic eddies may change along with variations in sea surface temperatures (SST). This paper presented the influence of SST in the northwest Indian Ocean on synoptic eddies in the lower troposphere over the SCS-PS in June. Our statistical analysis showed a significant negative correlation between the SST in the northwest Indian Ocean and the synoptic scale eddy kinetic energy (EKE) in the SCS-PS. By analyzing the EKE budget of synoptic eddies, we found that the variation in the synoptic scale EKE over the SCS-PS is mainly due to the change in the monthly zonal wind gradient, which affects the barotropic energy conversion between the monthly mean flow and the synoptic eddies. Additionally, the northwest Indian Ocean SST modulates the monthly flow over the SCS-PS by alternating the strength of the Walker circulation in the west Pacific and Indian Ocean. Finally, the influence of SST in the northwest Indian Ocean on EKE in the SCS-PS was reproduced using the simplified atmospheric general circulation model, SPEEDY.Funding Information
- National Natural Science Foundation of China (92158204)
- Science and Technology Program of Guangzhou (202102020939)
- Fundamental Research Funds for the Central University, Sun Yat-Sen University (22qntd2202)
- Key Laboratory of South China Sea Meteorological Disaster Prevention and Mitigation of Hainan Province (SCSF202002)
This publication has 43 references indexed in Scilit:
- On the Need of Intermediate Complexity General Circulation Models: A “SPEEDY” ExampleBulletin of the American Meteorological Society, 2013
- Interactions between Boreal Summer Intraseasonal Oscillations and Synoptic-Scale Disturbances over the Western North Pacific. Part I: Energetics Diagnosis*Journal of Climate, 2011
- Eddy Energy along the Tropical Storm Track in Association with ENSOJournal of the Meteorological Society of Japan. Ser. II, 2009
- Impacts of the basin‐wide Indian Ocean SSTA on the South China Sea summer monsoon onsetInternational Journal of Climatology, 2008
- Analysis of Tropical Cyclogenesis in the Western North Pacific for 2000 and 2001*Weather and Forecasting, 2007
- Origin of the Summertime Synoptic-Scale Wave Train in the Western North Pacific*Journal of the Atmospheric Sciences, 2006
- The impact of decadal‐scale Indian Ocean sea surface temperature anomalies on Sahelian rainfall and the North Atlantic OscillationGeophysical Research Letters, 2003
- NCEP–DOE AMIP-II Reanalysis (R-2)Bulletin of the American Meteorological Society, 2002
- The Energetics and Propagation Dynamics of Tropical Summertime Synoptic-Scale DisturbancesMonthly Weather Review, 1992
- The global energy cycle of stationary and transient atmospheric waves: Results from ECMWF analysesArchiv für Meteorologie, Geophysik und Bioklimatologie Serie A, 1991