TY - JOUR AU - Remer, Lorraine A. AU - Davis, Anthony B. AU - Mattoo, Shana AU - Levy, Robert C. AU - Kalashnikova, Olga V. AU - Coddington, Odele AU - Chowdhary, Jacek AU - Knobelspiesse, Kirk AU - Xu, Xiaoguang AU - Ahmad, Ziauddin AU - Boss, Emmanuel AU - Cairns, Brian AU - Dierssen, Heidi M. AU - Diner, David J. AU - Franz, Bryan AU - Frouin, Robert AU - Gao, Bo-Cai AU - Ibrahim, Amir AU - Martins, J. Vanderlei AU - Omar, Ali H. AU - Torres, Omar AU - Xu, Feng AU - Zhai, Peng-Wang PY - 2019 M3 - Review TI - Retrieving Aerosol Characteristics From the PACE Mission, Part 1: Ocean Color Instrument JO - Frontiers in Earth Science UR - https://www.frontiersin.org/articles/10.3389/feart.2019.00152 VL - 7 SN - 2296-6463 N2 - NASA’s Plankton, Aerosol, Clouds, ocean Ecosystem (PACE) satellite mission is scheduled to launch in 2022, with the Ocean Color Instrument (OCI) on board. For the first time reflected sunlight from the Earth across a broad spectrum from the ultraviolet (UV: 350 nm) to the short wave infrared (SWIR: 2260 nm) will be measured from a single instrument at 1 km spatial resolution. While seven discrete bands will represent the SWIR, the spectrum from 350 to 890 nm will be continuously covered with a spectral resolution of 5 nm. OCI will thus combine in a single instrument (and at an enhanced spatial resolution for the UV) the heritage capabilities of the Moderate resolution Imaging Spectroradiometer (MODIS) and the Ozone Monitoring Instrument (OMI), while covering the oxygen A-band (O2A). Designed for ocean color and ocean biology retrievals, OCI also enables continuation of heritage satellite aerosol products and the development of new aerosol characterization from space. In particular the combination of MODIS and OMI characteristics allows deriving aerosol height, absorption and optical depth along with a measure of particle size distribution. This is achieved by using the traditional MODIS visible-to-SWIR wavelengths to constrain spectral aerosol optical depth and particle size. Extrapolating this information to the UV channels allows retrieval of aerosol absorption and layer height. A more direct method to derive aerosol layer height makes use of O2A absorption methods, despite the relative coarseness of the nominal 5 nm spectral resolution of OCI. Altogether the PACE mission with OCI will be an unprecedented opportunity for aerosol characterization that will continue climate data records from the past decades and propel aerosol science forward toward new opportunities. ER -