MAPING AND COMPARISON OF DIFFERENT SENSORS' GEOPHYSICAL PRODUCTS IN THE EASTERN BLACK SEA REGION

摘要

In this study, final geophysical products of MERIS, MODIS and SeaWIFS were compared in the South Eastern Black Sea coastal and open waters. Chlorophyll-a (Chl-a) is widely accepted as a main component defining phytoplankton biomass in the Black Sea. Depends on season, circulation and mixing, typical Chl-a values range between 0.05 to 2 mg/m{sup}3 in open waters and up to 5-10 mg/m{sup}3 in coastal regions. Therefore, it is important to know, relative consistency between different ocean colour sensors by considering temporal and spatial variability. The SeaWIFS current default four-band algorithm (OC4v4) tends to over estimate Chl-a, whereas MERIS (algal I and algal II) and MODIS (OC3M) standard algorithms are expected to perform better in the Black Sea. Reasonable correlation (up to R2 = 0.80) have been found between different sensors depending on time and location, which will be described. Additionally, the implications of developing a regional algorithm to derive Chl-a are discussed in relation to the local factors effecting the remotely sensed signal.