scholarly journals Spatio-temporal variability of a chlorophyll-a based biomass index and influence of coastal sources of enrichment in the Algerian Basin

2022 ◽  
Vol 232 ◽  
pp. 104629
Author(s):  
Romaissa Harid ◽  
Hervé Demarcq ◽  
Mehdia-Asma Keraghel ◽  
Malik Ait-Kaci ◽  
Mohamed Zerrouki ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Temporal Variability ◽  
Spatio Temporal

scholarly journals Spatio-Temporal Variability of Chlorophyll-A and Environmental Variables in the Panama Bight

2020 ◽  
Vol 12 (13) ◽  
pp. 2150
Author(s):  
Andrea Corredor-Acosta ◽  
Náyade Cortés-Chong ◽  
Alberto Acosta ◽  
Matias Pizarro-Koch ◽  
Andrés Vargas ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Satellite Data ◽  
Temporal Variability ◽  
Phytoplankton Growth ◽  
Sea Surface ◽  
Chl A ◽  
Physical Variables ◽  
Spatio Temporal

The analysis of synoptic satellite data of total chlorophyll-a (Chl-a) and the environmental drivers that influence nutrient and light availability for phytoplankton growth allows us to understand the spatio-temporal variability of phytoplankton biomass. In the Panama Bight Tropical region (PB; 1–9°N, 79–84°W), the spatial distribution of Chl-a is mostly related to the seasonal wind patterns and the intensity of localized upwelling centers. However, the association between the Chl-a and different physical variables and nutrient availability is still not fully assessed. In this study, we evaluate the relationship between the Chl-a and multiple physical (wind, Ekman pumping, geostrophic circulation, mixed layer depth, sea level anomalies, river discharges, sea surface temperature, and photosynthetically available radiation) and chemical (nutrients) drivers in order to explain the spatio-temporal Chl-a variability in the PB. We used satellite data of Chl-a and physical variables, and a re-analysis of a biogeochemical product for nutrients (2002–2016). Our results show that at the regional scale, the Chl-a varies seasonally in response to the wind forcing and sea surface temperature. However, in the coastal areas (mainly Gulf of Panama and off central-southern Colombia), the maximum non-seasonal Chl-a values are found in association with the availability of nutrients by river discharges, localized upwelling centers and the geostrophic circulation field. From this study, we infer that the interplay among these physical-chemical drivers is crucial for supporting the phytoplankton growth and the high biodiversity of the PB region.

scholarly journals Effects of Spring–Neap Tidal Cycle on Spatial and Temporal Variability of Satellite Chlorophyll-A in a Macrotidal Embayment, Ariake Sea, Japan

2020 ◽  
Vol 12 (11) ◽  
pp. 1859
Author(s):  
Mengmeng Yang ◽  
Joaquim I. Goes ◽  
Hongzhen Tian ◽  
Elígio de R. Maúre ◽  
Joji Ishizaka
Keyword(s):  
Chlorophyll A ◽  
Temporal Variability ◽  
Tidal Cycle ◽  
Ocean Color ◽  
Spatial And Temporal Variability ◽  
Ariake Sea ◽  
Chl A ◽  
Moderate Resolution ◽  
Spatio Temporal ◽  
Moderate Resolution Imaging Spectroradiometer

We investigated the spatio-temporal variability of chlorophyll-a (Chl-a) and total suspended matter (TSM) associated with spring–neap tidal cycles in the Ariake Sea, Japan. Our study relied on significantly improved, regionally-tuned datasets derived from the ocean color sensor Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua over a 16-year period (2002–2017). The results revealed that spring–neap tidal variations in Chl-a and TSM within this macrotidal embayment (the Ariake Sea) are clearly different regionally and seasonally. Generally, the spring–neap tidal variability of Chl-a in the inner part of the Ariake Sea was controlled by TSM for seasons other than summer, whereas it was controlled by river discharge for summer. On the other hand, the contribution of TSM to the variability of Chl-a was not large for two areas in the middle of Ariake Sea where TSM was not abundant. This study demonstrates that ocean color satellite observations of Chl-a and TSM in the macrotidal embayment offer strong advantages for understanding the variations during the spring–neap tidal cycle.

Spatio-temporal variability of chlorophyll-a in response to coastal upwelling and mesoscale eddies in the South Eastern Arabian Sea

2021 ◽  
Vol 42 (13) ◽  
pp. 4840-4867
Author(s):  
Muhammad Shafeeque ◽  
A. N. Balchand ◽  
Phiros Shah ◽  
Grinson George ◽  
Smitha B.R. ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Temporal Variability ◽  
Arabian Sea ◽  
Coastal Upwelling ◽  
Mesoscale Eddies ◽  
The South ◽  
South Eastern ◽  
Eastern Arabian Sea ◽  
Spatio Temporal

Spatio-temporal Variability of Chlorophyll-A in the Coastal Zone of Northeastern Brazil

2014 ◽  
Vol 38 (1) ◽  
pp. 72-83 ◽  
Author(s):  
José L. Rosa Neto ◽  
Carlos Ruberto Fragoso ◽  
Ana C. M. Malhado ◽  
Richard J. Ladle
Keyword(s):  
Chlorophyll A ◽  
Coastal Zone ◽  
Temporal Variability ◽  
Northeastern Brazil ◽  
Spatio Temporal

Spatio-temporal variability of surface chlorophyll-a in the Halmahera Sea and its relation to ENSO and the Indian Ocean Dipole

2019 ◽  
Vol 41 (1) ◽  
pp. 284-299 ◽  
Author(s):  
R. Y. Setiawan ◽  
A. Wirasatriya ◽  
U. Hernawan ◽  
S. Leung ◽  
I. Iskandar
Keyword(s):  
Indian Ocean ◽  
Chlorophyll A ◽  
Temporal Variability ◽  
Indian Ocean Dipole ◽  
The Indian Ocean ◽  
Spatio Temporal
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