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Remote sensing of the southern ocean by MERIS, MODIS, SeaWiFS and ENEA Lidar

L. FIORANI1,* , I. G. OKLADNIKOV2, A. PALUCCI1

Affiliation

  1. ENEA, FIM-FISLAS, Via Fermi 45, 00044 Frascati, Italy
  2. ENEA guest, IMCES, SCERT, Akademicheskii Avenue 10/3, 634055 Tomsk, Russia

Abstract

Oceanic phytoplankton plays a major role in climate regulation. This explains the international efforts in space monitoring of chlorophyll-a concentration, i.e. the main indicator of algal biomass. In this study three radiometers (MERIS, MODIS and SeaWiFS), aboard satellites, and the ENEA lidar, aboard a ship, are intercompared. Important discrepancies among the radiometers have been observed. In particular, MERIS can be up to 100% apart from MODIS and SeaWiFS. This difference reduces to about 35% if MERIS is calibrated with the ENEA lidar. Those results confirm the unavoidable need of precise measurements of chlorophyll-a concentration in close proximity to the sea surface. Moreover, it is demonstrated that regional calibrations of satellite radiometers lead to more accurate estimates of oceanic phytoplankton..

Keywords

Lidar, SeaWIFS, Remote sensing, oceanic Phytoplankton monitoring, Radiometer.

Submitted at: Jan. 5, 2008
Accepted at: June 9, 2008

Citation

L. FIORANI, I. G. OKLADNIKOV, A. PALUCCI, Remote sensing of the southern ocean by MERIS, MODIS, SeaWiFS and ENEA Lidar, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 6, pp. 1482-1488 (2008)