Comparison of two in-water optical profilers in a dynamic coastal marine ecosystem

Bausell, J.; Kudela, Raphael M.

doi:10.1364/ao.58.007319

Cited by 2 publications

(2 citation statements)

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“…In-water validation data were collected aboard the R/V John Martin for COAST and OCEANIA, and from the Santa Cruz Municipal Wharf for C-HARRIER. Instrumentation (Table 1) included the C-OPS and HyperPro II profiling radiometers, MicroTOPS II sun photometer, and ancillary measurements of water quality parameters including total chlorophyll a (TChl a; Van Heukelem and Thomas, 2001), phytoplankton composition via microscopy (Lund et al, 1958), CDOM (Hooker et al, 2020), IOP, and standard oceanographic parameters (temperature, salinity) as described in Bausell and Kudela (2019) and Hooker et al (2020). Suspended Particulate Material (SPM) was not collected, but a United States Geological Survey (USGS) cruise in San Francisco Bay provided a range of concentrations from the same time period of 14.6-126.3 mg L −1 (n = 6) for San Pablo and Suisun bays (Grizzly Bay is in northern Suisun; Figure 1).…”

Section: Field Sites and In Situ Measurementsmentioning

confidence: 99%

“…Both instrument packages employ single-channel microradiometers, allowing sensor calibration, data collection, and post-processing to occur using the same workflow and identical hardware components (Hooker et al, 2018a,b,c). Data were again collected over northern Monterey Bay on 5 November 2013 ( Figure 6A showing MODIS Aqua Chl a; see also Palacios et al, 2015;Bausell and Kudela, 2019) with clear skies, good visibility, and low winds. TChl a was comparable to COAST with a value of 8.3 mg m −3 .…”

Section: Oceania 2013mentioning

confidence: 99%

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Airborne Radiometry for Calibration, Validation, and Research in Oceanic, Coastal, and Inland Waters

Guild

Kudela

Hooker

et al. 2020

Front. Environ. Sci.

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Present-day ocean color satellite sensors, which principally provide reliable data on chlorophyll, sediments, and colored dissolved organic material in the open ocean, are not well suited for coastal and inland water studies for a variety of reasons, including coarse spatial and spectral resolution plus challenges with atmospheric correction. National Aeronautics and Space Administration (NASA) airborne mission concepts tested in 2011, 2013, 2017, and 2018 over Monterey Bay, CA, and nearby inland waters have demonstrated the feasibility of improving airborne monitoring and research activities in case-1 and case-2 aquatic ecosystems through the combined use of state-of-the-art above- and in-water measurement capabilities. These competencies have evolved through time to produce a sensor-web approach: imaging spectrometer, microradiometers, and a sun photometer (airborne) with their analogous algorithms, and with corresponding in-water radiometers and ground-based sun photometry. The NASA airborne instrument suite and mission concept demonstrations, leveraging high-quality above- and in-water data, significantly improves the fidelity as well as the spatial and spectral resolution of observations for studying and monitoring water quality in oceanic, coastal, and inland water ecosystems. The goal of this series of projects was to develop and fly a portable airborne sensor suite for NASA science missions focusing on a gradient of water types from oligotrophic to turbid waters addressing the challenges of an optically complex coastal ocean zone and inland waters. The airborne radiometry in this range of aquatic conditions and sites has supported improved results of studies of water quality and biogeochemistry and provides capabilities for research areas such as ocean productivity and biogeochemistry; aquatic impacts of coastal landscape alteration; coastal, estuarine, and inland waters ecosystem productivity; atmospheric correction; and regional climate variability.

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Section: Field Sites and In Situ Measurementsmentioning

confidence: 99%

Section: Oceania 2013mentioning

confidence: 99%

Airborne Radiometry for Calibration, Validation, and Research in Oceanic, Coastal, and Inland Waters

Guild

Kudela

Hooker

et al. 2020

Front. Environ. Sci.

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Modeling hyperspectral normalized water-leaving radiance in a dynamic coastal ecosystem

Bausell

Kudela

2021

Opt. Express

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Next-generation satellite sensors such as the Ocean Color Instrument (OCI) aboard the NASA Plankton, Aerosols, Cloud and ocean Ecosystem (PACE) satellite and the proposed Surface Biology and Geology (SBG) sensor will provide hyperspectral measurements of water-leaving radiances. However, acquiring sufficiently accurate in situ validation data in coastal ecosystems remains challenging. Here we modeled hyperspectral normalized water-leaving radiance ([L W (λ)] N ) in a dynamic coastal ecosystem using in situ inherent optical properties (IOPs) as inputs to the Hydrolight radiative transfer model. By reducing uncertainty of modeled hyperspectral [L W (λ)] N (%RMSE ≤ 21%) relative to [L W (λ)] N derived from in situ radiometric measurements (%RMSE ≤ 33%), we introduce modeling as an alternative or complementary method to in-water radiometric profilers for validating satellite-derived hyperspectral data from coastal ecosystems.

show abstract

Comparison of two in-water optical profilers in a dynamic coastal marine ecosystem

Cited by 2 publications

References 40 publications

Airborne Radiometry for Calibration, Validation, and Research in Oceanic, Coastal, and Inland Waters

Airborne Radiometry for Calibration, Validation, and Research in Oceanic, Coastal, and Inland Waters

Modeling hyperspectral normalized water-leaving radiance in a dynamic coastal ecosystem

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