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Green Bay Area of Concern Color Producing Agents 2012

Green Bay Area of Concern Color Producing Agents

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Green Bay Area of Concern Color Producing Agents. 2012. Color Producing Agents. Water color in inland and coastal water results mainly from three different parameters, known as color-producing agents (CPAs): - PowerPoint PPT Presentation

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Page 1: Green Bay Area of Concern  Color Producing Agents

Green Bay Area of Concern Color Producing Agents

2012

Page 2: Green Bay Area of Concern  Color Producing Agents

Color Producing Agents• Water color in inland and coastal water results mainly from three different

parameters, known as color-producing agents (CPAs):– Chlorophyll (CHL): A green pigment found in plant cells. Algal

cells that are suspended in water produce a green-yellow color.– Dissolved Organic Carbon (DOC): Organic carbons that are

produced as part of micro-organism metabolism or are transported from decaying vegetation products via rivers and streams. DOC only absorbs light, it doesn’t scatter it. It appears yellow to brown in color (CDOM).

– Suspended Minerals (SM): Inorganic particulate matter. Scatters and absorbs light.

DOCCHL SM

Page 3: Green Bay Area of Concern  Color Producing Agents

Color Producing AgentsHydro-optical (HO) models are tables of specific backscattering and absorption coefficientsDifferent bodies of water have different HO models

Similar types of water bodies have similar HO-models, such as Lake Michigan and Lake Huron

HO model depends of what type of CPAs are in the water

Page 4: Green Bay Area of Concern  Color Producing Agents

CPA Algorithm

Given an HO-model for a body of water, CPA concentration images can be produced from satellite reflectance images using multivariate inverse procedures

Our algorithm uses the Levenburg-Marquardt (LM) procedure for finding a solution to the inverse problem

A CPA concentration vector is found which minimizes the error between the measured and calculated RSR

For more information about our CPA Algorithm, please contact Dr. Robert Shuchman: [email protected]

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