Azhar, Siti Syairah Atiqah and Chenoli, Sheeba Nettukandy and Abu Samah, Azizan and Kim, Seong-Joong and Murukesh, Nuncio (2023) The mechanism linking the variability of the Antarctic sea ice extent in the Indian Ocean sector to Indian summer monsoon rainfall. Climate Dynamics, 60 (9-10). pp. 2665-2685. ISSN 0930-7575, DOI https://doi.org/10.1007/s00382-022-06466-z.
Full text not available from this repository.Abstract
The study investigates the mechanism of teleconnection between the variability of sea ice extent (SIE) in the Indian Ocean sector of the Southern Ocean and the variability of Indian summer monsoon rainfall. We utilized reanalysis, satellite, in-situ observation data, and model output from the coupled model intercomparison project phase 5 (CMIP5) from 1979 to 2013. The empirical orthogonal function (EOF) and correlation analysis show that the first and third modes of principal component (PC1 and PC3) of SIE in the Indian Ocean sector during April-May-June (AMJ) are significantly correlated with the second mode of principal component (PC2) of Indian summer monsoon rainfall. The reanalysis data revealed that the changes in the SIE in the Indian Ocean sector excite meridional wave train responses along the Indian Ocean for both principal component modes. Positive (negative) SIE anomalies based on first and third EOFs (EOF1 and EOF3), contribute to the strengthening (weakening) of the Polar, Ferrel, and Hadley cells, inducing stronger (weaker) convective activity over the Indian latitudes. The stronger (weaker) convective activity over the Indian region leads to more (less) rainfall over the region during high (low) ice phase years. Furthermore, a stronger (weaker) polar jet during the high (low) ice phase is also noted. The selected CMIP5 models captured certain atmospheric teleconnection features found in the reanalysis. During AMJ, the SIE simulated by the NorESM1-M model was significantly positively correlated with Indian summer monsoon rainfall, whereas the IPSL-CM54-LR model showed a negative correlation.
| Item Type: | Article |
|---|---|
| Funders: | Fundamental Research Grant Scheme [FRGS: FP059-2019A], Ministry of Sciences Technology and Innovation Flagship Grant [FP1213E03], Academic Sciences of Malaysia, Sultan Mizan Antarctic Research Foundation, Korea Polar Research Institute [PE22030] |
| Uncontrolled Keywords: | Antarctic sea ice extent (SIE) in the Indian Ocean sector; High ice phase; Low ice phase; Indian summer monsoon rainfall; Convective activity |
| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > Institute of Ocean and Earth Sciences Faculty of Arts and Social Sciences > Department of Geography |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 14 Jun 2024 07:26 |
| Last Modified: | 14 Jun 2024 07:26 |
| URI: | http://eprints.um.edu.my/id/eprint/39470 |
Actions (login required)
 |
View Item |
