POSTER Session 3

ACQUISITION OF IN SITU DATA FOR VALIDATION OF NASA PACE OCI PRODUCTS IN THE LAURENTIAN GREAT LAKES

The Great Lakes serve as an ideal location to validate PACE Ocean Color Instrument (OCI) freshwater products due to the large range of particle compositions and concentrations which yield a wide range of optical properties. Additionally, due to their sheer size, the Great Lakes are also very conducive for application of OCI products at 1 km spatial resolution, which is not the case for most freshwater systems in general. Moreover, the potential of the PACE mission to provide advanced data products that go beyond traditional ocean color is of high interest to the Great Lakes community. To realize these new capabilities, exhaustive validation is critical to achieving required product accuracy and document uncertainties. As part of the NASA PACE Validation Science Team (PVST), we have developed a three-tiered strategy to acquire in situ PACE OCI validation data in the Great Lakes that includes recurring seasonal and weekly monitoring cruises, a dedicated “super-site”, and other cruises of opportunity. All measurement activities follow best practices established in the IOCCG protocol series and include documented uncertainty. A key component of the validation sampling plan is the deployment of an inline optical flowthrough system on board the USEPA R/V Lake Guardian which samples all five Lakes each spring and summer. The inline system measures particulate IOPs including hyperspectral backscattering (Hyper-bb). In addition to the inline system, we measure continuous above water radiometry with a robotic pySAS. Discrete water samples are also processed to derive bio-optical and chemical parameters along with HPLC pigments.

Michael Sayers, Michigan Tech Research Institute, USA, [email protected], https://orcid.org/0000-0003-3008-1668

Karl Bosse, Michigan Tech Research Institute, USA, [email protected]

Nils Haentjens, University of Maine, USA, [email protected]

Tim Moore, Harbor Branch Oceanographic Institute, Florida Atlantic University, USA, [email protected]

Emmanuel Boss, University of Maine, USA, [email protected]

Ray Watkins, Michigan Tech Research Institute, USA, [email protected]

Code of Conduct
Privacy Policy