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18438

Sea Surface Temperature Analysis for Predicting Coral Bleaching Induced by Thermal Stress for Hurghada Region Using AVHRR Satellite Imagery

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Last updated: 03 Jan 2025

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Abstract

Coral reefs are vital ecosystems which are incredibly diverse and have a very important role in the marine life ecosystem. They are very sensitive to environmental change; one of the most threats to the coral reefs is thermal stress that could lead to coral bleaching and affects the coral ability to recover. The satellite approach solution is one of the important monitoring systems to predict thermal stress and possible coral bleaching alerts. The remote sensing approach uses Sea Surface Temperature (SST) derived from infrared observations collected by the Advanced Very High Resolution Radiometer (AVHRR) sensors from the NOAA polar orbiting satellites using the Multi-Channel Sea-Surface temperature (MCSST) algorithm. SST was computed for the study area on a daily basis along the year 2009 from 9km resolution AVHRR night images after scaling the byte digital number or DN values into the appropriate sea surface temperature and convert Pixel Coordinate to Latitude and Longitude positions. The Sea Surface Temperature Anomaly and Coral Bleaching Hot Spot and Coral Bleaching Degree Heating Week (DHW) were calculated to define regions of unusual elevated SST and the occurrence and magnitude of thermal stress as well as the accumulation of thermal stress over time in order to monitor the cumulative effect as a thermal stress index. Applying the remote sensing approach on Hurghada region showed a good primary indicator to be used for monitoring coral stress and predicting possible coral bleaching and coral resilience ability. The aim of the study was to introduce the satellite approach as an assessment process and a prediction tool of the thermal stress on the coral that could perform bleaching and that is an important key factor for providing accurate, economical and useful results for the preservation of the coral reef ecosystem

Keywords

bleaching, Coral reef, Hurghada, Remote Sensing, Sea Surface Temperature

Authors

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Last Name

Zakaria

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Affiliation

Department of Marine Science, College of Science, Suez Canal University

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Orcid

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First Name

B.

Last Name

Salem

MiddleName

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Affiliation

Department of Environmental Science, College of Science, Alexandria University

Email

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City

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Orcid

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First Name

K.

Last Name

El-Din

MiddleName

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Affiliation

Department of Oceanography, College of Science, Alexandria University

Email

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City

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Orcid

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First Name

M.

Last Name

Selim

MiddleName

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Affiliation

Department of Marine Science, College of Science, Suez Canal University

Email

mohamedbedir@hotmail.com

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Volume

7

Article Issue

1

Related Issue

3850

Issue Date

2012-11-01

Receive Date

2018-11-06

Publish Date

2012-11-01

Page Start

41

Page End

49

Print ISSN

1687-5052

Online ISSN

2090-2786

Link

https://cat.journals.ekb.eg/article_18438.html

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https://cat.journals.ekb.eg/service?article_code=18438

Order

6

Type

Original Article

Type Code

644

Publication Type

Journal

Publication Title

Catrina: The International Journal of Environmental Sciences

Publication Link

https://cat.journals.ekb.eg/

MainTitle

Sea Surface Temperature Analysis for Predicting Coral Bleaching Induced by Thermal Stress for Hurghada Region Using AVHRR Satellite Imagery

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Article

Created At

22 Jan 2023