International Journal of Oceans and Oceanography

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Interannual Fluctuations of the Atmospheric Pressure, Sea Surface Temperature, and Chlorophylla of the Arabian Sea


Affiliations
1 Institute of Biology of the Southern Seas, 2 Nahimov Pr., Sevastopol 99011, Ukraine
2 Marine Hydrophysical Institute, 2 Kapitanskaya Str., Sevastopol 99011, Ukraine
3 SultanQaboos University, CAMS, Al-Khod 123, Sultanate of Oman
4 Marine Hydrophysical Institute, 2 Kapitanskaya Str., Sevastopol 99011
     

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In order to estimate general trends of interannual variability (in 1985-2008), the Arabian Sea was divided into the four regions for which remotely sensed atmospheric pressure, sea surface temperature, and chlorophyll-a concentration were analyzed. In data analysis, the model of polyphonic fractalwave vibrator representing the hierarchical system of polyphonic oscillators with the resonance interaction between major tones and overtones was employed. In terms of the fractal-wave approach, the spectral characteristics should form the system of enclosed structures. These characteristics were estimated by the internal-spectral analysis. For the studied period, the expansion of the atmospheric low pressure zone (along the Pakistani and Indian coast) and rising sea surface temperatures (~ 0.3-0.6oC) accompanied by a weak decline (~ -0.1- 0.2 mg m-3) in chlorophyll-a concentration were noticed. The trends evaluated were proposed to be the elements of lowfrequent fluctuation shaving a period of ~ 60-70 years, reported earlier for some physical and biological variables for the northern hemisphere. It was assumed that a positive phase of this fluctuation will be over in the next 5-7 years after which the Arabian Sea will enter the phase of negative Indian Ocean Dipole, lasting the next 25-30 years, which might be accompanied by a moderate increase in biological productivity- as it had happened before, according to the paleontological data on sediment cores from the western Arabian Sea.

Keywords

Sea Surface Temperature, Chlorophyll-a, Arabian Sea
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  • Interannual Fluctuations of the Atmospheric Pressure, Sea Surface Temperature, and Chlorophylla of the Arabian Sea

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Authors

V.N. Eremeev
Institute of Biology of the Southern Seas, 2 Nahimov Pr., Sevastopol 99011, Ukraine
A.N. Jukov
Marine Hydrophysical Institute, 2 Kapitanskaya Str., Sevastopol 99011, Ukraine
N.E. Lebedev
Marine Hydrophysical Institute, 2 Kapitanskaya Str., Sevastopol 99011, Ukraine
S.A. Piontkovski
SultanQaboos University, CAMS, Al-Khod 123, Sultanate of Oman
A.A. Sizov
Marine Hydrophysical Institute, 2 Kapitanskaya Str., Sevastopol 99011

Abstract


In order to estimate general trends of interannual variability (in 1985-2008), the Arabian Sea was divided into the four regions for which remotely sensed atmospheric pressure, sea surface temperature, and chlorophyll-a concentration were analyzed. In data analysis, the model of polyphonic fractalwave vibrator representing the hierarchical system of polyphonic oscillators with the resonance interaction between major tones and overtones was employed. In terms of the fractal-wave approach, the spectral characteristics should form the system of enclosed structures. These characteristics were estimated by the internal-spectral analysis. For the studied period, the expansion of the atmospheric low pressure zone (along the Pakistani and Indian coast) and rising sea surface temperatures (~ 0.3-0.6oC) accompanied by a weak decline (~ -0.1- 0.2 mg m-3) in chlorophyll-a concentration were noticed. The trends evaluated were proposed to be the elements of lowfrequent fluctuation shaving a period of ~ 60-70 years, reported earlier for some physical and biological variables for the northern hemisphere. It was assumed that a positive phase of this fluctuation will be over in the next 5-7 years after which the Arabian Sea will enter the phase of negative Indian Ocean Dipole, lasting the next 25-30 years, which might be accompanied by a moderate increase in biological productivity- as it had happened before, according to the paleontological data on sediment cores from the western Arabian Sea.

Keywords


Sea Surface Temperature, Chlorophyll-a, Arabian Sea

References