noaa national ocean service (nos) requirements for goes-r ocean color capability
DESCRIPTION
NOAA National Ocean Service (NOS) Requirements for GOES-R Ocean Color Capability. Introduction - PowerPoint PPT PresentationTRANSCRIPT
NOAA National Ocean Service (NOS) Requirements for GOES-R Ocean Color CapabilityIntroductionNOAA’s coastal monitoring mission requires the GOES-R HES/Coastal Waters Imager to provide timely and reliable water quality information for ecosystem monitoring and management, and to address climate variability. To address the mission requirements, observations are needed for chlorophyll, suspended sediment, water clarity, and algal species. High spatial and temporal resolution measurements are needed at the following wavelengths: 412, 443, 490, 510, 555, 580, 610, 645, 667, 678, 709, 765 and 865 nm. Justification, demonstrated uses, and examples are shown below.
DetectHABS in Turbid Water
Ocean ColorApplicationsTo SupportNOS Mission
Monitor Water Clarity
Understand Climate Variability
SupportingVariables
Required WavelengthsTo Estimate Variables
DemonstratedUse
Light Attenuation
Chlorophyll in Clear water
FluorescenceLine Height
DetectBlue-Green Algae
Atmospheric Correction
Chlorophyll 555, 580, 610, 645
667, 678
Mean Chlorophyll for Monterey Bay National Marine Sanctuary 1997-2004
0.01.02.03.04.05.06.07.08.0
Oct-97
Jan-98
Apr-98
Jul-98
Oct-98
Jan-99
Apr-99
Jul-99
Oct-99
Jan-00
Apr-00
Jul-00
Oct-00
Jan-01
Apr-01
Jul-01
Oct-01
Jan-02
Apr-02
Jul-02
Oct-02
Jan-03
Apr-03
Jul-03
Oct-03
Jan-04
Apr-04
Jul-04
Oct-04
date
chl (ug/L)
mean chl grand mean chl
443, 490, 510, 555
412, 443, 490, 667, 678, 709
CDOM and Chlorophyll Separator
490, 555
Sediment Load
555, 610, 645, 675
Examples from NOS regions of interest
Microcystis bloom in western basin of Lake Erie, 8/18/03. Source: www.epa.gov/2004update
Light attenuation Source: NASA/Goddard Space Flight Center and Orbimage
Eight-year time series of chlorophyll from SeaWiFS, over Monterey Bay National Marine Sanctuary. Source: Ojanen et al.
CDOM Absorption at 412 nm. Source: Gould et al.
Aircraft
CZCS, AVHRR, SeaWiFS, MODIS
MODIS, MERIS
SeaWiFS, MODIS
SeaWiFS
SeaWiFS, MODIS
709, 765, 865A Priori For AllWater Retrievals
SeaWiFS MODIS, MERIS
Washington and Oregon coastMERIS FLH
Source: Gower et al. MODIS FLH Source: Letelier et al.
Gulf of Mexico
The Great Lakes
MODIS Rrs640 (i.e. turbidity)Source: Ransibrahmanakul et al.
Low High US East Coast
US West Coast
US West Coast
Landsat-7Algae in Green BaySource: LakeSat.org
All atmospheric correction algorithms for ocean color rely on near IR bands to determine the amount and type of aerosol present. However, the Near IR is also contaminated by light scattered from sediment in the ocean, especially in the coastal zone. Three unknown quantities (total light from atmosphere, total light from water, and type of aerosol) require three channels to solve the atmospheric correction equation. The proposed channels for the GOES-R Coastal Waters Imager are 709, 765, and 865 nm.
Presenters:Varis Ransibrahmanakul,Richard P. Stumpf, both of NOAA NOS, and John J. Pereira of NOAA NESDIS.
Contact: [email protected] 713 3028 x 142NOAA NOS, 1305 East-West Hwy, N/SCI rm 9111, Silver Spring, MD 20910