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

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

scholarly journals Spatio-temporal variability in hydro-chemical characteristics of coastal waters of Salimpur, Chittagong along the Bay of Bengal

2016 ◽  
Vol 4 (1) ◽  
pp. 335 ◽  
Author(s):  
Avijit Talukder ◽  
Debbrota Mallick ◽  
Tasnuba Hasin ◽  
Ishrat Zahan Anka ◽  
Md Mehedi Hasan
Keyword(s):  
Water Quality ◽  
Coastal Zone ◽  
Coastal Waters ◽  
Temporal Variability ◽  
Seasonal Characteristics ◽  
Ship Breaking ◽  
Investigation Period ◽  
Spatio Temporal ◽  
Negative Impacts ◽  
Freshwater Inputs

Diverse seasonal characteristics of hydro-chemical parameters in the coastal zone are significantly related to aquaculture development. In this paper, general water quality condition derived from laboratory analysis from the coastal waters of Salimpur, Chittagong is presented. Samples were collected from onshore and offshore site of two adjacent coastal locations named as North Salimpur (experimental location) and South Kattoli (control) during a monsoon and a dry season spanning 2013-14. The spatio-temporal variability of studied parameters were found as air temperature 26.5-32.5 ˚C, water temperature 23-33 °C, pH 7.1-7.9, DO 4.29-7.11 mg/L, BOD 1.10-3.25 mg/L, salinity 1.6-21 ppt, EC 3.40-35.68 mS/cm, TDS 2.02-21.99 g/L, TSS 0.62-2.76 g/L, transparency 4.5-14 cm, precipitation 64-1992 mm, NO2-N 1.94-2.58 µg/L, PO4-P 0.45-1.84 µg/L, SiO3-Si 130.46-956.31 µg/L during investigation period. Average values of physicochemical parameters were found to be in compliance with standard guidelines. The ship breaking activities near experimental location possess negative impacts on local geomorphology, freshwater inputs, precipitation and aquatic environment as well. Moreover, wind driven forces, tidal action, wave characteristics and changes in monsoon pattern regulate the coastal processes. This research suggests the importance of regular monitoring to assess present status of water quality and future prospect of aquaculture in the Chittagong coastal zone.

Spatio-temporal variability of the amplitude-phase structure of storm waves in the coastal zone of the sea

Oceanology ◽  
2009 ◽  
Vol 49 (2) ◽  
pp. 182-192 ◽  
Author(s):  
Ya. V. Saprykina ◽  
S. Yu. Kuznetsov ◽  
Zh. Cherneva ◽  
N. Andreeva
Keyword(s):  
Coastal Zone ◽  
Temporal Variability ◽  
Phase Structure ◽  
Storm Waves ◽  
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
Sign in / Sign up

Export Citation Format

Share Document