Chlorophyll-a concentrations in the Arabian Gulf waters of arid region: A case study from the northern coast of Qatar

• DOI: 10.1016/j.rsma.2022.102680
• Publication Date: 2022-09-25T13:54:32Z
• Authors: Sankaran Rajendran; Noora Al-Naimi; Jassim A. Al Khayat; Caesar Flonasca S...; Fadhil N. Sadooni; Hamad Al Saad Al ...
• Keywords: Spectral bands; Multispectral pattern recognition

Remote sensing of spectrally active Chlorophyll-a (Chl-a) in the gulf water an arid region is important to understand spatial and temporal variations phytoplankton biomass water. This study characterizes spectral absorption Chl-a detects maps Al Arish–Al Ghariyah coastal northern Qatar using data Hyperion EO-1, MultiSpectral Instrument (MSI) Sentinel-2, Operational Land Imager (OLI) Landsat-8 satellites. The image spectra showed band absorptions near 450 475 nm blue around 640, 730, 760, 830 red region. analysis by linear unmixing (LSU) method occurrence very shallow mapping Arish–Al​ was carried out MSI OLI NDCI, 2BDA, 3BDA, FLH violet algorithms, which concentrations distributions performance algorithms studied WorldView-3 data, provided R2 values 60% best suitability NDCI algorithm map concentration Chl-a. All results were validated field measurements, in-situ laboratory analyses samples. measurements poor confirmed imagery results. remote with physical chemical parameters samples allowed us assess evaluates sensor's capability applications satellite Gulf waters