Estimation of marine boundary layer depth and relative humidity with multispectral satellite measurements
Kren, Richard J.
Durkee, Philip A.
Wash, Carlyle H.
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estimating marine boundary layer depth and relative humidity structure from satellite inferred measurements of aerosol optical depth, total water vapor and sea-surface temperature. The data originate from radiance measurements by channels 1, 4 and 5 of NOAA's AVHRR instrument. The technique assumes that the atmospheric optical depth and total water vapor are primarily confined within the boundary layer, and that the layer is well-mixed. These inputs are combined through the relative humidity dependent variables of extinction and vapor density. Relative humidity is parameterized as an increasing linear function wit h height, resulting in an equation for the near-surface relative humidity. This equation is solved, enabling estimation of boundary layer depth and humidity structure. The technique is iterative in nature, requiring 5 to 10 iterations for convergence.
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