An Introductory Method An Introductory Method For Evaluating the MODIS For Evaluating the MODIS Cloud Mask Over Water Cloud Mask Over Water Corey Calvert Corey Calvert UW/CIMSS, Madison, Wisconsin UW/CIMSS, Madison, Wisconsin Andrew Heidinger Andrew Heidinger NOAA/NESDIS Office of Research and NOAA/NESDIS Office of Research and Applications Applications November 1, 2006 November 1, 2006
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An Introductory Method For Evaluating the MODIS Cloud Mask Over Water
An Introductory Method For Evaluating the MODIS Cloud Mask Over Water. Corey Calvert UW/CIMSS, Madison, Wisconsin Andrew Heidinger NOAA/NESDIS Office of Research and Applications November 1, 2006. Outline. Method Data used Cloud mask error estimation Examples Results / Comparisons - PowerPoint PPT Presentation
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An Introductory Method For An Introductory Method For Evaluating the MODIS Cloud Evaluating the MODIS Cloud
Mask Over WaterMask Over WaterCorey CalvertCorey Calvert
Motivation?Motivation? Currently there are little or no globally Currently there are little or no globally
quantitative tools to evaluate the quantitative tools to evaluate the MODIS cloud mask over waterMODIS cloud mask over water
Evaluation/validation tools will be Evaluation/validation tools will be needed for the instruments aboard needed for the instruments aboard future satellites (e.g., GOES-R, future satellites (e.g., GOES-R, NPOESS VIIRS)NPOESS VIIRS)
SummarySummary The MODIS cloud mask appears The MODIS cloud mask appears
consistentconsistent Between both Aqua and TerraBetween both Aqua and Terra Between day and nightBetween day and night
Latitudinal differences are seenLatitudinal differences are seen Smaller % of clear pixels and larger % of cloudy Smaller % of clear pixels and larger % of cloudy
pixels towards the polespixels towards the poles confident cloudy errors decreases towards the confident cloudy errors decreases towards the
polespoles
Future WorkFuture Work Comparison between collect 4/5Comparison between collect 4/5
Seasonal comparisonsSeasonal comparisons
Comparison between different Comparison between different instruments (e.g., AVHRR)instruments (e.g., AVHRR)
Operational Use of the MODIS Operational Use of the MODIS Cloud MaskCloud Mask
A regional real-time SST analysis is being created A regional real-time SST analysis is being created around Florida (Florida Tech)around Florida (Florida Tech) Produced 4 times per day Produced 4 times per day Combines GOES SST composites and level 2 MODIS SSTs Combines GOES SST composites and level 2 MODIS SSTs
(DB UW) via 2DVar method(DB UW) via 2DVar method Will eventually be used as lower boundary initialization Will eventually be used as lower boundary initialization
over water for ARPS/ADAS or WRF models at NWS offices over water for ARPS/ADAS or WRF models at NWS offices in FLin FL
A consistent and reliable cloud mask for the A consistent and reliable cloud mask for the MODIS SSTs is crucial to maintain the quality of MODIS SSTs is crucial to maintain the quality of the overall analysisthe overall analysis