DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTS

Since its launch into orbit on board of the ENVISAT spacecraft on March 1st, 2002, the Scanning Imaging Absorption Spectrometer for Atmospheric Cartography (SCIAMACHY) continuously measures transmitted, reflected and scattered solar radiation from 220 - 2380 nm at moderate spectral resolution (0,2 n...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Sierk,B., Bracher,A., Richter,A., Vountas,M., Dinter,T., Burrows,J.P.
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2004
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300039
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0717-65382004000300039
record_format	dspace
spelling	oai:scielo:S0717-653820040003000392005-05-16DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTSSierk,B.Bracher,A.Richter,A.Vountas,M.Dinter,T.Burrows,J.P.Since its launch into orbit on board of the ENVISAT spacecraft on March 1st, 2002, the Scanning Imaging Absorption Spectrometer for Atmospheric Cartography (SCIAMACHY) continuously measures transmitted, reflected and scattered solar radiation from 220 - 2380 nm at moderate spectral resolution (0,2 nm - 1,5 nm). Global maps of atmospheric trace gas distributions are derived from these measurements using the Differential Optical Absorption Spectroscopy (DOAS) technique. Although SCIAMACHY is primarily an atmospheric mission, part of the detected solar radiation penetrates the ocean surface and picks up an absorption signal from molecular species in sea water. In the visible part of the measured spectra, spectral features of chlorophyll can clearly be identified. We show that the spectral signature of chlorophyll in SCIAMACHY spectra can be used to infer column densities of phytoplankton abundance. We present first results obtained in a case study of a phytoplankton bloom event off the West African coast in March 2003 and compare the results with ocean colour measurements of the SeaWifs instrument. While the spatial resolution of the SCIAMACHY instrument (60 x 30 km) is coarse in comparison with ocean colour instruments, we provide evidence that the detected spectral signatures have the potential of discriminating between different phytoplankton species. Finally, we investigate a method to infer chlorophyll concentration by exploiting the additional information from effective water penetration depth, which is obtained from the DOAS analysis of liquid water absorptioninfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.68 n.2 suppl.TIIProc 20042004-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300039en10.4067/S0717-65382004000300039
institution	Scielo Chile
collection	Scielo Chile
language	English
description	Since its launch into orbit on board of the ENVISAT spacecraft on March 1st, 2002, the Scanning Imaging Absorption Spectrometer for Atmospheric Cartography (SCIAMACHY) continuously measures transmitted, reflected and scattered solar radiation from 220 - 2380 nm at moderate spectral resolution (0,2 nm - 1,5 nm). Global maps of atmospheric trace gas distributions are derived from these measurements using the Differential Optical Absorption Spectroscopy (DOAS) technique. Although SCIAMACHY is primarily an atmospheric mission, part of the detected solar radiation penetrates the ocean surface and picks up an absorption signal from molecular species in sea water. In the visible part of the measured spectra, spectral features of chlorophyll can clearly be identified. We show that the spectral signature of chlorophyll in SCIAMACHY spectra can be used to infer column densities of phytoplankton abundance. We present first results obtained in a case study of a phytoplankton bloom event off the West African coast in March 2003 and compare the results with ocean colour measurements of the SeaWifs instrument. While the spatial resolution of the SCIAMACHY instrument (60 x 30 km) is coarse in comparison with ocean colour instruments, we provide evidence that the detected spectral signatures have the potential of discriminating between different phytoplankton species. Finally, we investigate a method to infer chlorophyll concentration by exploiting the additional information from effective water penetration depth, which is obtained from the DOAS analysis of liquid water absorption
author	Sierk,B. Bracher,A. Richter,A. Vountas,M. Dinter,T. Burrows,J.P.
spellingShingle	Sierk,B. Bracher,A. Richter,A. Vountas,M. Dinter,T. Burrows,J.P. DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTS
author_facet	Sierk,B. Bracher,A. Richter,A. Vountas,M. Dinter,T. Burrows,J.P.
author_sort	Sierk,B.
title	DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTS
title_short	DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTS
title_full	DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTS
title_fullStr	DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTS
title_full_unstemmed	DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTS
title_sort	determination of phytoplankton concentrations from space-borne spectroscopic measurements
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300039
work_keys_str_mv	AT sierkb determinationofphytoplanktonconcentrationsfromspacebornespectroscopicmeasurements AT brachera determinationofphytoplanktonconcentrationsfromspacebornespectroscopicmeasurements AT richtera determinationofphytoplanktonconcentrationsfromspacebornespectroscopicmeasurements AT vountasm determinationofphytoplanktonconcentrationsfromspacebornespectroscopicmeasurements AT dintert determinationofphytoplanktonconcentrationsfromspacebornespectroscopicmeasurements AT burrowsjp determinationofphytoplanktonconcentrationsfromspacebornespectroscopicmeasurements
_version_	1718442082150907904

DETERMINATION OF PHYTOPLANKTON CONCENTRATIONS FROM SPACE-BORNE SPECTROSCOPIC MEASUREMENTS

Ejemplares similares