Estimation of particulate organic carbon in the ocean from space-based polarization lidar measurements

Xiaomei Lu; Yongxiang Hu

doi:10.1117/12.2076612

10 December 2014 Estimation of particulate organic carbon in the ocean from space-based polarization lidar measurements

Xiaomei Lu, Yongxiang Hu

Proceedings Volume 9261, Ocean Remote Sensing and Monitoring from Space; 92610Z (2014) https://doi.org/10.1117/12.2076612
Event: SPIE Asia-Pacific Remote Sensing, 2014, Beijing, China

Abstract

A relationship between depolarization ratio and surface concentration of particulate organic carbon (POC) is developed from the NASA SeaWiFS Bio-optical Archive and Storage System (SeaBASS) in situ measurements and the Cloud- Aerosol Lidar with Orthogonal Polarization (CALIOP) active lidar measurements. This relationship provides an algorithm for estimating global POC from satellite or airborne polarization lidar measurements. Application of this relationship to CALIOP data indicates that the estimates of POC ranges from about 3.3 mg/m³within the South Pacific Subtropical Gyre to 1.2×10³mg/m³in the area near land are in good agreement with Moderate Resolution Imaging spectroradiometer (MODIS) POC products. Our results present depolarization ratio as a valuable tool for evaluating global POC predictions in ocean ecosystem. The application of the algorithm to a 7-year of CALIOP depolarization ratio mean values revealed patters of seasonal and interannual variability of POC. By comparing the results averaged over the entire study region and entire season for each year separately, we found that the lowest POC occurred in 2013 and the highest POC occurred in 2008.

Citation Download Citation

Xiaomei Lu and Yongxiang Hu "Estimation of particulate organic carbon in the ocean from space-based polarization lidar measurements", Proc. SPIE 9261, Ocean Remote Sensing and Monitoring from Space, 92610Z (10 December 2014); https://doi.org/10.1117/12.2076612

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KEYWORDS

LIDAR

Polarization

Satellites

MODIS

Carbon

Algorithm development

In situ metrology

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