Correlation and coherence analysis between sea surface temperature (SST) and surface wind in the Equatorial Western Sumatra Waters

International Conference On Tropical Meteorology And Atmospheric Sciences

生态环境科学;原子能学

Hatmaja, R.B.^1 ; Wisha, U.J.^2 ; Radjawane, I.M.^1 ; Tanto, T Al^2

Earth Sciences Study Program, Faculty of Earth Sciences and Technology, Bandung Institute of Technology, Jl. Ganeca no. 10, Bandung - West Java

40135, Indonesia^1

Research Institute of Coastal Resources and Vulnerability, Ministry of Marine Affairs and Fisheries, Jl. Raya Padang-Painan KM. 16, Bungus, Padang - West-Sumatra

25245, Indonesia^2

关键词: Cross-wavelet transform;    Indian ocean dipoles;    Intra-seasonal variabilities;    Madden-Julian oscillation;    Sea surface temperature (SST);    Sumatra;    Surface wind speed;    Wavelet methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/303/1/012003/pdf
DOI  :  10.1088/1755-1315/303/1/012003

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Equatorial Western Sumatra Waters have a tremendous dynamic in ocean characteristics. It directly faces the Indian Ocean exactly located below the equator. Consequently, Equatorial Western Sumatra waters are influenced by the tropical climatic factors such as monsoons and climate variabilities, such as Indian Ocean Dipole (IOD) and Madden Julian Oscillation (MJO) that control sea surface temperature (SST) fluctuation in the Indian Ocean regions. This study aimed to review the correlation and coherence of SST distributed by surface wind in the Equatorial Western Sumatra waters. Wavelet method (cross wavelet transforms and wavelet coherence) was used to analyze the correlation and coherency between SST and surface wind. The annual variation of SST for 365 days period is the strongest event throughout the year caused by either monsoon or the changes of wind speed in the surface. Otherwise, the strongest intra-seasonal SST variation of 35 - 60 days observed from December 2012 to March 2013. The highest surface wind speed occurs in the southern and western waters. The surface wind plays a role in evoking SST distribution of 35 - 60 days period (intra-seasonal variability). Besides, the surface wind with 6 months period (semi-annual variability) influences the SST distribution which is identified only in the southern waters and the Indian Ocean regions. These conditions are possibly predicted as the influence of monsoons.