Study of the Long-term Average Concentration of Chlorophyll a and Its Relation to Variations in Sea Level Temperature and Aerosol Optical Depth over the Sea of Oman and the Persian Gulf (2003-2020)

Document Type : Original Article

Authors

1 Ph.D. in Meteorology, Atmospheric Science and meteorology Research Center, Tehran, Iran

2 Assistant professor, University of Tehran, Faculty of Geography, Tehran, Iran

3 Assistant professor, Atmospheric Science and meteorology Research Center, Tehran, Iran

10.30467/nivar.2021.146147

Abstract

Chlorophyll concentrations in marine environments indicate phytoplankton levels and ultimately the production of marine ecosystems. Chlorophyll concentration is not constant and depends on quantities such as sea surface temperature and aerosols optical depth, it also has seasonal variations and the correlation between these factors is various at different depths. Investigating the long-term relationship (2003 to 2020) between sea level temperature changes and aerosol optical depth with chlorophyll concentration on the Persian Gulf and the Sea of Oman coasts using daily MODIS products shows a considerable correlation in coastal areas. This correlation is the highest in shallowest water depths. The trend of sea-level temperature and light depth of aerosols changes in the two regions of the Persian Gulf and the Sea of Oman is similar, and its highest values are observed in summer, while its lowest is observed in winter. Remarkably, this seasonal trend is reversed in chlorophyll concentrations, with the lowest values observed in summer and the highest in winter. Additionally, the study of dust occurrence on July 30, 2018, showed the possibility of time delay in the correlation between sea-level temperature and aerosol optical depth with chlorophyll-a concentration.

Keywords

References

1. Gallisai, R., Peters, F., Volpe, G., Basart, S. and Baldasano, J.M., 2014. Saharan dust deposition may affect phytoplankton growth in the Mediterranean Sea at ecological time scales. PloS one, 9(10). 2. Paytan, A., Mackey, K.R., Chen, Y., Lima, I.D., Doney, S.C., Mahowald, N., Labiosa, R. and Post, A.F., 2009. Toxicity of atmospheric aerosols on marine phytoplankton. Proceedings of the National Academy of Sciences, 106(12), pp.4601-4605. 3. Tan, S.C., Shi, G.Y., Shi, J.H., Gao, H.W. and Yao, X., 2011. Correlation of Asian dust with chlorophyll and primary productivity in the coastal seas of China during the period from 1998 to 2008. Journal of Geophysical Research: Biogeosciences, 116(G2). 4. Deng, Z.Q., Han, Y.X., Bai, H.Z. and Zhao, T.L., 2008: Effect of dust aerosol production in China mainland on marine primary productivity. China Environmental Science, 28, pp.872-876. 5. Moradi, M., and Moradi, N., 2020: Correlation between concentrations of chlorophyll-a and satellite derived climatic factors in the Persian Gulf. Marine Pollution Bulletin, 161, 111728. 6. Moradi, M., and Kabiri, K., 2015: Spatio-temporal variability of SST and Chlorophyll-a from MODIS data in the Persian Gulf. Marine Pollution Bulletin, 98, 14-25. 7. Mobarak Hassan, E., Rahnama, M., Noori, F. 2021: Investigation of the possible impact of dust on chlorophyll concentration in north and south Iranian water resources (2007- 2017). Amphibious Science and Technology, 2(1), 36-54. 8. Rahnama, M., A. Ranjbar, S. Attarchi, 2018: Effect of dust storm on sea surface temperature and Chlorophyll content using MODIS images in the Persian Gulf and Oman Sea. 4th International Conference on the Persian Gulf Oceanography, 17-18 Feb 2018, Tehran, Iran. 9. Rahnama, M., S. Attarchi, 2018: Seasonal Variability of Sea Surface Temperature on the Persian Gulf and Oman sea Using MODIS Data. 4th International Conference on the Persian Gulf Oceanography, 17-18 Feb 2018, Tehran, Iran.
Nivar
Volume 45, 114-115 - Serial Number 114
September 2021
Pages 117-125

Files

History

  • Receive Date: 26 December 2021
  • Revise Date: 07 January 2022
  • Accept Date: 20 January 2022
  • First Publish Date: 20 January 2022

Share

How to cite

Statistics