stephanie l haines and frank lafontaine june 12, 2007
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transitioning unique NASA data and research technologies to the NWS1
Stephanie L Haines and Frank LaFontaine
June 12, 2007
Compositing of MODIS Products
transitioning unique NASA data and research technologies to the NWS2
IntroductionIntroduction
Coastal NWS offices wanted high resolution SST product to address forecast Coastal NWS offices wanted high resolution SST product to address forecast
problemsproblems Weather associated with land/sea breezesWeather associated with land/sea breezes
Off shore weather such as clouds, precipitation, temperatures etc.Off shore weather such as clouds, precipitation, temperatures etc.
Single pass of MODIS provides limited coverageSingle pass of MODIS provides limited coverage
Simple composite generated from multiple passes of MODIS data provides Simple composite generated from multiple passes of MODIS data provides
spatially continuous cloud free coveragespatially continuous cloud free coverage Main assumption is that SST does not change significantly from one day to the nextMain assumption is that SST does not change significantly from one day to the next
High resolution (1 km), full coverage on a regional scaleHigh resolution (1 km), full coverage on a regional scale
Small scale features in SST gradients retainedSmall scale features in SST gradients retained
Alternative to the Real-Time Global (RTG) SST analysis and/or the OSTIA Alternative to the Real-Time Global (RTG) SST analysis and/or the OSTIA
analysis for model assimilation analysis for model assimilation
Can also composite additional MODIS ocean color products such as chlorophyllCan also composite additional MODIS ocean color products such as chlorophyll
transitioning unique NASA data and research technologies to the NWS3
MethodologyMethodology
Use the 1km SST MODIS product to produce a Use the 1km SST MODIS product to produce a
detailed and spatially continuous SST field while detailed and spatially continuous SST field while
minimizing cloud contamination and latency effectsminimizing cloud contamination and latency effects Obtain SST in real-time from University of South Obtain SST in real-time from University of South
Florida (USF)Florida (USF)
Generate a SPoRT MODIS cloud mask for the same Generate a SPoRT MODIS cloud mask for the same
passpass
Retain 5 clear (as determined by the cloud mask) Retain 5 clear (as determined by the cloud mask)
SST values for each pixel separately for day and SST values for each pixel separately for day and
nightnight
Average some of clear values to obtain a more Average some of clear values to obtain a more
consistent fieldconsistent field
Evaluating the use of AMSR-E SST to reduce latencyEvaluating the use of AMSR-E SST to reduce latency
transitioning unique NASA data and research technologies to the NWS4
SST ComparisonsSST Comparisons
MODIS SST composites generated 4 times daily at 1 km resolutionMODIS SST composites generated 4 times daily at 1 km resolution
RTG-SST once daily 0.5 degree or 1/12 degree resolutionRTG-SST once daily 0.5 degree or 1/12 degree resolution
OSTIA once daily 5 km resolutionOSTIA once daily 5 km resolution
Loops available online at Loops available online at http://weather.msfc.nasa.gov/sport/sstAnimation/
Terra 04 UTC Aqua 19 UTCTerra 16 UTCAqua 07 UTC
RTG SST 0.5 degree
OSTIA SST5 km
transitioning unique NASA data and research technologies to the NWS5
Work Performed Since Last SACWork Performed Since Last SAC
Operational domain expanded to include Central America and composites being Operational domain expanded to include Central America and composites being
provided to the SERVIR groupprovided to the SERVIR group
SST composites provided in near real time in GRIB (gridded binary) format for SST composites provided in near real time in GRIB (gridded binary) format for
ease of use by modelers and additional users, used in several WRF modeling ease of use by modelers and additional users, used in several WRF modeling
studiesstudies
Composites also provided to Mobile and Miami NWS offices within AWIPSComposites also provided to Mobile and Miami NWS offices within AWIPS
Journal article describing the method and validation for the May 2004 case, Journal article describing the method and validation for the May 2004 case,
written and accepted for publication in the IEEE journal “Transactions on written and accepted for publication in the IEEE journal “Transactions on
Geoscience and Remote Sensing” Geoscience and Remote Sensing”
SST composites provided to WorldWinds Inc.SST composites provided to WorldWinds Inc.
Ocean color products obtained from USF and compositing work begunOcean color products obtained from USF and compositing work begun
transitioning unique NASA data and research technologies to the NWS6
Proprietary
MERGED ATLANTIC MODIS AND AVHRR
SST PRODUCT
MODIS composite SST serves as a data source for hybrid marine products.
WxWorx, Inc. products available to marine customers
MODIS SST data reaches over 8000 users in the marine community!
NASA Products Support Marine WeatherNASA Products Support Marine Weather
SPoRT provides WorldWinds Inc. MODIS SST composites for their analysis system
WorldWinds packages SST with other marine products for distribution by WxWorx Inc. (an
affiliate of Baron Services)
In conjunction with XM Satellite Radio Inc., WxWorx provides up to date weather
information for boat owners PC based display software hand-held applications
transitioning unique NASA data and research technologies to the NWS7
Ocean Color CompositesOcean Color Composites
Obtaining in real time from University of South Florida the following productsObtaining in real time from University of South Florida the following products ChlorophyllChlorophyll Total suspended matterTotal suspended matter Fluorescence line heightFluorescence line height
Started work on compositing these productsStarted work on compositing these products Of the two most recent values for each pixel, use the largest value in the compositeOf the two most recent values for each pixel, use the largest value in the composite
Composites and single passes put on web Composites and single passes put on web http://weather.msfc.nasa.gov/sport/oceancolor/
Single Pass of Aqua CHL Aqua CHL Composite
transitioning unique NASA data and research technologies to the NWS8
Future WorkFuture Work
Continue to improve MODIS SST composites byContinue to improve MODIS SST composites by Improving latency by including AMSR-E SST in cloudy, non-coastal regionsImproving latency by including AMSR-E SST in cloudy, non-coastal regions
Improve the SPoRT MODIS cloud mask for ocean applicationsImprove the SPoRT MODIS cloud mask for ocean applications
Improve the ocean color compositesImprove the ocean color composites Learn about the products from USF expertsLearn about the products from USF experts
Adjust the compositing techniques Adjust the compositing techniques
Looking at generating West Coast composites (requested by WorldWinds). Requires near Looking at generating West Coast composites (requested by WorldWinds). Requires near
real time source of MODIS data – both SST and cloud maskreal time source of MODIS data – both SST and cloud mask
Provide ocean color composites to NWS offices, WorldWinds Inc.Provide ocean color composites to NWS offices, WorldWinds Inc.
Support field programs (ex. TCSP (summer 06), TC4 (summer 07)).Support field programs (ex. TCSP (summer 06), TC4 (summer 07)).
ProposalsProposals WRF linked with coastal ocean model into the North Carolina Forecast System - NASA provide SST WRF linked with coastal ocean model into the North Carolina Forecast System - NASA provide SST
data and other remote sensing expertise. ROSES 2007 – Disaster Management. PI: Adel Hanna data and other remote sensing expertise. ROSES 2007 – Disaster Management. PI: Adel Hanna
(UNC-Chapel Hill), Jedlovec and Haines Co-PIs(UNC-Chapel Hill), Jedlovec and Haines Co-PIs
Daily Chlorophyll Products for Ecosystem and Fishery Applications, Co-PIs: Elizabeth Valenti Daily Chlorophyll Products for Ecosystem and Fishery Applications, Co-PIs: Elizabeth Valenti
(WorldWinds, Inc.) and Gary Jedlovec (NASA/MSFC) – RPC Council, May 2007.(WorldWinds, Inc.) and Gary Jedlovec (NASA/MSFC) – RPC Council, May 2007.
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