Evaluation of SeaWiFS and MODIS chlorophyll-a products in the Argentinean Patagonian Continental Shelf (38° S-55° S)
Field measurements of surface chlorophyll-a concentration were used to evaluate for the first time the performance of the standard Moderate Resolution Imaging Spectroradiometer (MODIS) and both standard and regional Sea-viewing Wide Field-of-view Sensor (SeaWiFS) ocean colour algorithms in the Patag...
Guardado en:
Publicado: |
2008
|
---|---|
Materias: | |
Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01431161_v30_n1_p251_Dogliotti http://hdl.handle.net/20.500.12110/paper_01431161_v30_n1_p251_Dogliotti |
Aporte de: |
id |
paper:paper_01431161_v30_n1_p251_Dogliotti |
---|---|
record_format |
dspace |
spelling |
paper:paper_01431161_v30_n1_p251_Dogliotti2023-06-08T15:11:46Z Evaluation of SeaWiFS and MODIS chlorophyll-a products in the Argentinean Patagonian Continental Shelf (38° S-55° S) Band structure Chlorophyll NASA Radiometers Regional planning Satellite imagery Chlorophyll concentration Chlorophyll-a concentration Continental shelves Field measurement Moderate resolution imaging spectroradiometer Regional differences Sea-viewing wide field-of-view sensors Surface chlorophyll Uncertainty analysis algorithm chlorophyll a estimation method MODIS radiometer Atlantic Ocean Patagonian Shelf Field measurements of surface chlorophyll-a concentration were used to evaluate for the first time the performance of the standard Moderate Resolution Imaging Spectroradiometer (MODIS) and both standard and regional Sea-viewing Wide Field-of-view Sensor (SeaWiFS) ocean colour algorithms in the Patagonian Continental Shelf (PCS) between 38° S and 55° S. The results showed that the regional algorithms did not significantly improve the global algorithm estimates. Moreover, the SeaWiFS OC4v4 algorithm, National Aeronautics and Space Administration (NASA) standard chlorophyll product, showed the best performance among all the algorithms examined. Nonetheless, all the global and local algorithms analysed showed uncertainties dependent on chlorophyll concentration. Low chlorophyll-a concentration values tended to be overestimated and high values tended to be underestimated. A regional analysis within the PCS showed that higher uncertainties are found in the homogeneous side of the tidal fronts present in the PCS, in areas suggested to be optically complex case 2 waters, while a better result (less bias) was obtained in the southern mid-shelf region. We discuss the probable reasons and provide possible explanations of the regional differences in the performance of the algorithms. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01431161_v30_n1_p251_Dogliotti http://hdl.handle.net/20.500.12110/paper_01431161_v30_n1_p251_Dogliotti |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Band structure Chlorophyll NASA Radiometers Regional planning Satellite imagery Chlorophyll concentration Chlorophyll-a concentration Continental shelves Field measurement Moderate resolution imaging spectroradiometer Regional differences Sea-viewing wide field-of-view sensors Surface chlorophyll Uncertainty analysis algorithm chlorophyll a estimation method MODIS radiometer Atlantic Ocean Patagonian Shelf |
spellingShingle |
Band structure Chlorophyll NASA Radiometers Regional planning Satellite imagery Chlorophyll concentration Chlorophyll-a concentration Continental shelves Field measurement Moderate resolution imaging spectroradiometer Regional differences Sea-viewing wide field-of-view sensors Surface chlorophyll Uncertainty analysis algorithm chlorophyll a estimation method MODIS radiometer Atlantic Ocean Patagonian Shelf Evaluation of SeaWiFS and MODIS chlorophyll-a products in the Argentinean Patagonian Continental Shelf (38° S-55° S) |
topic_facet |
Band structure Chlorophyll NASA Radiometers Regional planning Satellite imagery Chlorophyll concentration Chlorophyll-a concentration Continental shelves Field measurement Moderate resolution imaging spectroradiometer Regional differences Sea-viewing wide field-of-view sensors Surface chlorophyll Uncertainty analysis algorithm chlorophyll a estimation method MODIS radiometer Atlantic Ocean Patagonian Shelf |
description |
Field measurements of surface chlorophyll-a concentration were used to evaluate for the first time the performance of the standard Moderate Resolution Imaging Spectroradiometer (MODIS) and both standard and regional Sea-viewing Wide Field-of-view Sensor (SeaWiFS) ocean colour algorithms in the Patagonian Continental Shelf (PCS) between 38° S and 55° S. The results showed that the regional algorithms did not significantly improve the global algorithm estimates. Moreover, the SeaWiFS OC4v4 algorithm, National Aeronautics and Space Administration (NASA) standard chlorophyll product, showed the best performance among all the algorithms examined. Nonetheless, all the global and local algorithms analysed showed uncertainties dependent on chlorophyll concentration. Low chlorophyll-a concentration values tended to be overestimated and high values tended to be underestimated. A regional analysis within the PCS showed that higher uncertainties are found in the homogeneous side of the tidal fronts present in the PCS, in areas suggested to be optically complex case 2 waters, while a better result (less bias) was obtained in the southern mid-shelf region. We discuss the probable reasons and provide possible explanations of the regional differences in the performance of the algorithms. |
title |
Evaluation of SeaWiFS and MODIS chlorophyll-a products in the Argentinean Patagonian Continental Shelf (38° S-55° S) |
title_short |
Evaluation of SeaWiFS and MODIS chlorophyll-a products in the Argentinean Patagonian Continental Shelf (38° S-55° S) |
title_full |
Evaluation of SeaWiFS and MODIS chlorophyll-a products in the Argentinean Patagonian Continental Shelf (38° S-55° S) |
title_fullStr |
Evaluation of SeaWiFS and MODIS chlorophyll-a products in the Argentinean Patagonian Continental Shelf (38° S-55° S) |
title_full_unstemmed |
Evaluation of SeaWiFS and MODIS chlorophyll-a products in the Argentinean Patagonian Continental Shelf (38° S-55° S) |
title_sort |
evaluation of seawifs and modis chlorophyll-a products in the argentinean patagonian continental shelf (38° s-55° s) |
publishDate |
2008 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01431161_v30_n1_p251_Dogliotti http://hdl.handle.net/20.500.12110/paper_01431161_v30_n1_p251_Dogliotti |
_version_ |
1768545686716940288 |