Work

Evaluation of CALIOP derived backscattering coefficient ( b bp (532)) product over contrasted oceanic waters

Year: 2024

Type: article

Abstract: CALIOP satellite sensor offers advantages over passive sensors, particularly during nighttime and in polar-subpolar regions. Though originally designed for atmospheric studies, it was adapted to retrieve the backscattering coefficient at 532 nm, b bp (532) in the ocean. Scarce matchups and the lack of standardized protocol hindered previous validation efforts. An evaluation using a standardized protocol and diverse in-situ datasets from contrasted oceanic waters was carried out for the period 2008-2021, with the 2018-2021 period being evaluated for the first time. A strong correlation was observed with R 2 up to 0.94 (RMS: 0.001-0.01 m −1 , MRE: 42.7%-63%, bias: 36.88%-13.09%). A comparison with MODIS-Aqua b bp (532) product was performed showing comparable estimates of b bp (532). BGC-Argo data from 2018-2021 were also used to evaluate CALIOP b bp (532), revealing a lower correlation compared to 2008-2021 period, probably due to a decrease in CALIOP lidar power.

Source: Optics Express

DOI: 10.1364/oe.539704

Authors: Sayoob Vadakke-chanat, Cédric Jamet, Xiaomei Lu, Yongxiang Hu

Institution: Langley Research Center

Language: English

Topic: Atmospheric aerosols and clouds

Subfield: Global and Planetary Change

Field: Environmental Science

Domain: Physical Sciences

SDGs: Life below water, Climate action

Open Access status: gold

Estimated APC paid: $2,270