Transcript Document 7490359

BIOINFORMATIC MAPPING OF
OCEAN BIOGEOCHEMICAL
PROVINCES
Matthew Oliver (U. Del.)
Oscar Schofield (Rutgers)
Andrew Irwin (Mt. Allison University)
Paul Falkowski (Rutgers)
Static, manual provinces
Longhurst (1995, 1998, 2006)
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)
Automatic
unsupervised
classification
SeaWiFS
MODIS/Aqua
AVHRR SST
Oliver et al (2004)
JGR Oceans
2006 Annual mean
Maps are quite
similar
Are they real?
Time Series
ENSO indexes
Province areas (sum of 3)
2003 Jan
2006 Dec
Jan
2006
Gyre area
Jan 1998
To
Dec 2006
Gyre area
Jan 1998
To
Dec 2006
Area of Biome (% of Earth)
Jan
2006
Southern Hemisphere Gyres
Northern Hemisphere Gyres
Months since January 1998
Total C fixation (g / d) Trend
Combined Global
Gyres
Combined Tropical
Seas
Jan 1998
Dec 2006
Informational Content in MODIS and Sea-WiFS/AVHRR are
highly similar
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
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
Iron Limited
0%
1%
2%
3%
φsat-NPQ
4%
5%
-2
-1
Nitrogen Limited
0
1
Nutrient Stress Index
2
Iron Limited
0%
1%
2%
3%
φsat-NPQ
4%
5%
-2
-1
Nitrogen Limited
0
1
Nutrient Stress Index
2
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
NMFS Fish Stock Indicators
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
argo
Contact Us
Andrew Irwin: [email protected]
Poster 227
Matt Oliver: [email protected]
Poster 218
Oliver et al (2004) JGR Oceans