Gege, Peter (2012) Utilizing Downwelling Irradiance for Phytoplankton Determination. Ocean Optics XXI, 2012-10-08 - 2012-10-12, Glasgow, Scotland.
![]() |
PDF
1MB |
Kurzfassung
The downwelling irradiance is rarely utilized to determine optical parameters of a water body since the ever-changing water surface induces strong signal fluctuations in the upper meters of typically 20 to 40 %. An analytic model has been developed that calculates the spectra of the direct and diffuse component separately. It can cope with the fluctuations by treating, in addition to the unknown optical parameters of the water body, also the intensities of the two irradiance components as fit parameters during data analysis. The potential of this model for the determination of phytoplankton concentration was analyzed using data from two German lakes. Three phytoplankton classes could be identified above thresholds between 0.4 and 0.8 μg/l, and total pigment concentration (sum of chlorophyll-a and phaeophytin-a) could be determined with an uncertainty of 0.7 μg/l. This new approach may be of particular interest for shallow waters, where it is difficult to apply the usual reflectance-based algorithms due to bottom influences.
elib-URL des Eintrags: | https://elib.dlr.de/78073/ | ||||||||
---|---|---|---|---|---|---|---|---|---|
Dokumentart: | Konferenzbeitrag (Paper, Poster) | ||||||||
Titel: | Utilizing Downwelling Irradiance for Phytoplankton Determination | ||||||||
Autoren: |
| ||||||||
Datum: | Oktober 2012 | ||||||||
Referierte Publikation: | Nein | ||||||||
Open Access: | Ja | ||||||||
Gold Open Access: | Nein | ||||||||
In SCOPUS: | Nein | ||||||||
In ISI Web of Science: | Nein | ||||||||
Seitenbereich: | Seiten 1-9 | ||||||||
Status: | veröffentlicht | ||||||||
Stichwörter: | Irradiance, Water, Inversion, Phytoplankton | ||||||||
Veranstaltungstitel: | Ocean Optics XXI | ||||||||
Veranstaltungsort: | Glasgow, Scotland | ||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||
Veranstaltungsbeginn: | 8 Oktober 2012 | ||||||||
Veranstaltungsende: | 12 Oktober 2012 | ||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||
HGF - Programm: | Raumfahrt | ||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Vorhaben Spektrometrische Verfahren und Konzepte der Fernerkundung (alt) | ||||||||
Standort: | Oberpfaffenhofen | ||||||||
Institute & Einrichtungen: | Institut für Methodik der Fernerkundung > Experimentelle Verfahren | ||||||||
Hinterlegt von: | Gege, Dr.rer.nat. Peter | ||||||||
Hinterlegt am: | 25 Okt 2012 13:20 | ||||||||
Letzte Änderung: | 24 Apr 2024 19:44 |
Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags