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BIOINFORMATIC MAPPING OF OCEAN BIOGEOCHEMICAL PROVINCES Matthew Oliver (U. Del.) Oscar Schofield (Rutgers) Andrew Irwin (Mt. Allison University) Paul Falkowski (Rutgers)
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Static, manual provinces Longhurst (1995, 1998, 2006)
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Questions Can We Make Dynamic Provinces (space-time variant)? Why? Biome boundaries are predictive of hydrography Changes in biome size and distributions are bellwethers for cyclical and secular earth cycles True comparative analysis by controlling for advection (ie making provinces a quantitative measurement)
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Automatic unsupervised classification Oliver et al (2004) JGR Oceans SeaWiFS MODIS/Aqua AVHRR SST
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2006 Annual mean
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Maps are quite similar Are they real?
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Time Series
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Province areas (sum of 3) ENSO indexes 2003 Jan2006 Dec
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Jan 2006 Gyre area Jan 1998 To Dec 2006
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Jan 2006 Gyre area Jan 1998 To Dec 2006
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Total C fixation (g / d) Trend Combined Global Gyres Combined Tropical Seas Jan 1998Dec 2006
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Informational Content in MODIS and Sea-WiFS/AVHRR are highly similar
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Where are we? Have a verified method to make dynamic and quantitative maps Automatic Biomes reflect expert knowledge Biomes are change in response to well known global processes Biomes are being used to find cyclical and secular change in the ocean environment Comparative analysis of primary production in provinces
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Where are we going? Iron Dust Impacts? Linking MODIS and Sea-WiFS/AVHRR records together Biomes/Water Masses as Fisheries Indicators Adding 3-D Structures to Biomes
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1%2%3%4%0% φ sat-NPQ 5% -2210 Nutrient Stress Index Iron LimitedNitrogen Limited
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1%2%3%4%0% φ sat-NPQ 5% -2210 Nutrient Stress Index Iron LimitedNitrogen Limited
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Where are we going? Iron Dust Impacts? Linking MODIS and Sea-WiFS/AVHRR records together Biomes/Water Masses as Fisheries Indicators Adding 3-D Structures to Biomes
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NMFS Fish Stock Indicators
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Where are we going? Iron Dust Impacts? Linking MODIS and Sea-WiFS/AVHRR records together Biomes/Water Masses as Fisheries Indicators Adding 3-D Structures to Biomes
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argo
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Contact Us Andrew Irwin: airwin@mta.ca Poster 227 Matt Oliver: moliver@udel.edu Poster 218 Oliver et al (2004) JGR Oceans
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