IMPACT OF OZONE CONCENTRATION ON OCEAN COLOUR RETRIEVALS FOR OCM-2

• Published in: International archives of the photogrammetry, remote sensing and spatial information sciences. Vol. XLII-5; pp. 499 - 502
• Main Authors: Bhavani, I. V. G., Rao, T. D. V. P, Das, A., Choudhury, S. B., Nagamani, P. V., Prasad, K. V. S. R., Sasmal, S. K.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Gottingen Copernicus GmbH 19-11-2018; Copernicus Publications
• Subjects: Chlorophyll; Chlorophylls; Climate; Climatology; Color; Data analysis; Impact analysis; Ocean color; Ocean colour; Ozone; Pollution monitoring; Real time; Reflectance; Remote observing; Remote sensing; Sediment concentration; Suspended sediments; Transmittance
• ISSN: 2194-9034; 1682-1750; 2194-9034
• DOI: 10.5194/isprs-archives-XLII-5-499-2018

Ozone being an absorbing gas have a significant impact on OCM-2 bands 510 nm, 555 nm and 620 nm which are using for retrieval of major geophysical parameters like Chlorophyll and suspended sediment concentrations. A study has been carried out to analyse the impact of Ozone concentration by ingesting near real time from OMI (Ozone Monitoring Instrument) on Aura instead of Climatology V2013 (2004–13) with a resolution of 1 × 1 deg for ocean colour retrievals from OCM-2 sensor using SeaWiFS Data Analysis System (SeaDAS). The spectral behaviour of Ozone transmittance has been studied for various bands of OCM-2 by using both Climatology and near real time inputs. We could observe maximum relative error percentage about 12 % from Climatology to NRT in Ozone concentration and 0.28 %, 0.66 % and 0.72 % of maximum mean relative error in ozone transmittance at 512 nm, 557 nm and 620 nm. We calculated error budgets induced by ozone in remote sensing reflectance(/sr) where in we could observe mean relative error percentage of 0.52 % in 491 nm, 1.12 % in 512 nm and 4.28 % 557 nm a bands respectively.