Particulate absorption properties from MODIS ocean color and four in-situ transects in the southeastern Bering Sea shelf during July 2008

Puneeta Naik; Eurico J. D'Sa; Joaquim I. Goés; Helga do R. Gomes

doi:10.1117/12.831351

9 September 2009 Particulate absorption properties from MODIS ocean color and four in-situ transects in the southeastern Bering Sea shelf during July 2008

Puneeta Naik, Eurico J. D'Sa, Joaquim I. Goés, Helga do R. Gomes

Author Affiliations +

Proceedings Volume 7473, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2009; 747302 (2009) https://doi.org/10.1117/12.831351
Event: SPIE Remote Sensing, 2009, Berlin, Germany

Abstract

Measurements of particulate absorption, namely absorption by phytoplankton and non-algal particles (NAP) are important components in bio-optical models; only a few studies have been reported for the southeastern Bering Sea. This study analyzes variability in spectral particulate absorption (a_P(λ)) including phytoplankton (a_PHY(λ)) and NAP absorption (a_NAP(λ)) from in-situ data in conjunction with ocean color satellite data (MODIS - Moderate Resolution Imaging Spectroradiometer) along four transects in the southeastern Bering Sea shelf during a cruise in July 2008. Results obtained indicate that surface a_PHY(λ) at 443 nm is higher in middle shelf near the Pribilof Islands with a_NAP(λ) decreasing from north to south across the shelf. Greater than 90% of variability in a_P(λ) could be explained by a_PHY(λ) indicating biogenic matter dominates changes in particulate absorption. Good correlations were found between a_P(λ), a_PHY(λ) at 443 nm and chlorophyll-a (R² = 0.65 and 0.80, respectively). a_PHY(λ) spectra were highly variable, with larger variability in blue than red part of the spectrum, indicating change in pigment composition or package effect. MODIS satellite derived aPHY(λ) using quasi-analytical algorithms (QAA) revealed patterns similar to in-situ absorption data for a major part of the study area. Inconsistencies seen between in-situ absorption and QAA retrieved satellite absorption could probably be attributed to temporal differences between in-situ data collection and satellite overpass.

Citation Download Citation

Puneeta Naik, Eurico J. D'Sa, Joaquim I. Goés, and Helga do R. Gomes "Particulate absorption properties from MODIS ocean color and four in-situ transects in the southeastern Bering Sea shelf during July 2008", Proc. SPIE 7473, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2009, 747302 (9 September 2009); https://doi.org/10.1117/12.831351

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available