University of Sistan and Baluchestan Journal of Natural Environmental Hazards 2676-4377 14 45 2025 09 23 Oceanic Response to Tropical Cyclones: Analyzing Sea Surface Temperature Variations During Tropical Cyclone Nivar in the Bay of Bengal Oceanic Response to Tropical Cyclones: Analyzing Sea Surface Temperature Variations During Tropical Cyclone Nivar in the Bay of Bengal 113 132 8775 10.22111/jneh.2025.50002.2069 FA Seyedeh Nastaran Hashemi Ph.D. Student of Physical Oceanography, Department of Atmospheric and Oceanographic Science (non-Biologic), Faculty of Marine Science and Technology, University of Hormozgan, Bandar Abbas, Iran 0000-0002-3544-3974 Mahdi Mohammad Mahdizadeh Associate Professor, Department of Atmospheric and Oceanographic Science (non-Biologic), Faculty of Marine Science and Technology, University of Hormozgan, Bandar Abbas, Iran Mohammad Akbarinasab Associate Professor, Department of Marine Physics, Faculty of Marine and Environmental Sciences, University of Mazandaran, Babolsar, Iran Journal Article 2024 10 09 Various phenomena can cause changes in the sea surface temperature, including freshwater influx, wind, solar radiation, ocean currents, and evaporation. This study aims to determine the sea surface temperature anomaly caused by the passage of a tropical cyclone. The Nivar tropical cyclone occurred in the Bay of Bengal between November 22 and 27, 2020. Nivars originated from a low-pressure area in the Bay of Bengal. The Nivar tropical cyclone was monitored based on reports from the Indian Meteorological Department and using data on sea surface temperature, zonal wind component, and meridional wind component from the ERA5 reanalysis products on November 21-28, 2020. The aforementioned data were obtained at a three-hour time step and a spatial resolution of 0.25ͦ (approximately 30 km) one day before, one day after, and during the Nivar event. Given the significant role of sea surface temperature in oceanic processes and climate change, the analysis showed that with the passage of the Nivar cyclone, the temperature changed by one degree Celsius compared with the previous day. Providing a general framework for evaluating the ocean's response to cyclone changes can serve as a foundation for designing early warning systems and crisis management in coastal areas, including the southern coast of Iran. Various phenomena can cause changes in the sea surface temperature, including freshwater influx, wind, solar radiation, ocean currents, and evaporation. This study aims to determine the sea surface temperature anomaly caused by the passage of a tropical cyclone. The Nivar tropical cyclone occurred in the Bay of Bengal between November 22 and 27, 2020. Nivars originated from a low-pressure area in the Bay of Bengal. The Nivar tropical cyclone was monitored based on reports from the Indian Meteorological Department and using data on sea surface temperature, zonal wind component, and meridional wind component from the ERA5 reanalysis products on November 21-28, 2020. The aforementioned data were obtained at a three-hour time step and a spatial resolution of 0.25ͦ (approximately 30 km) one day before, one day after, and during the Nivar event. Given the significant role of sea surface temperature in oceanic processes and climate change, the analysis showed that with the passage of the Nivar cyclone, the temperature changed by one degree Celsius compared with the previous day. Providing a general framework for evaluating the ocean's response to cyclone changes can serve as a foundation for designing early warning systems and crisis management in coastal areas, including the southern coast of Iran. https://jneh.usb.ac.ir/article_8775_a8a05f92a59b4ad6bdacda281f7254f5.pdf