MOBY Time Series

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Current Status of MODIS (Terra and
Aqua) by Chuck Trees for the MODIS Team
Members
8th IOCCG Meeting in Florence, Italy (24-26 Feb
03)
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Brief MODIS History

• Definition Panel 1984
• Selection of Instrument, Instrument Team - 1989
• Restructuring - 1992
• MODIS-T out, PM MODIS-N in (6 MODIS-Ns)
• Major budget reduction - 1997
• Addition of team member investigations
• DIS rescope
• 6 platforms reduced to 1st 2 - AM-1, PM-1
• Launch Terra 12/1999
• Launch Aqua 5/2002
• Re-compete team in mid 2003

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TERRA MODIS NIGHTTIME 4mm SST
MAY 2001 V 3.3.1
-2 5 10 15 20 25 30 35 Co
MODIS/OCEAN GROUP GSFC, RSMAS
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MODIS SST Buoy and M-AERI retrieval
StatisticsVersion 4.5 (new delivery)median
satellite - reference MAERI or BUOYBUOY
M-AERI

• SST - new coefficients
• Median StdDev Number
• of Points
• Terra all -0.07 0.48 11027
• Terra night 0.01 0.42 4387
• Terra day -0.14 0.51 6643
• Aqua all -0.05 0.48 3821
• Aqua night -0.10 0.43 1628
• Aqua day -0.01 0.51 2203
• SST4 new coeffs, new formulation
• Terra night -0.05 0.41 4096
• Aqua night -0.10 0.39 1319

• SST - new coefficients
• Median StdDev Number
• of Points
• Terra all 0.10 0.40 439
• Terra night 0.04 0.35 235
• Terra day 0.16 0.42 204
• Aqua all 0.06 0.40 105
• Aqua night 0.02 0.37 59
• Aqua day 0.11 0.45 46
• SST4 new coeffs, new formulation
• Terra night 0.02 0.34 278
• Aqua night -0.01 0.31 52

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AQUA, TERRA combined orbits nearly eliminate
swath gapsComposite AQUA, TERRA SST Night Sept
29, 2002
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Nearly Complete Single Day Global
CoverageComposite Night (MODIS-T, MODIS-A) Day,
Night - (AMSR, TMI) Prototype Sept 29, 2002,
0.25O spatial resolution
Kyle
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MODIS Ocean Products

• MODIS Instruments
• Terra (1030 morning),
• Aqua (1330 afternoon)
• 40 products
• 4 SST,
• 36 Ocean Color
• Resolution
• Spatial
• Level 2 - 1km, 2000km x 2000km
• Level 3 - 4km, 36km, 1 deg all products are
  global
• Temporal Resolution
• Level 2 - 5 minute granule
• Level 3 - daily, 8 day week, monthly, yearly

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MODIS Ocean data products

• There are 86 ocean parameters available in over
  100 categories of MODIS Ocean data types
  archived by (and may be obtained from) the NASA
  Goddard Distributed Active Archive Center.
• The three basic groupings of MODIS ocean data
  parameters are
• ocean color
• sea surface temperature
• ocean primary production
• Ocean Parameter categories
• 36 Ocean Color parameters
• 4 Sea Surface Temperature parameters
• 8 Primary Productivity parameters
• (including 2 Primary Production indices)
• 38 Quality Control parameters.

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Future Data Releases

• Next reprocessing Terra Collection 4 in May 2003

1. Calibration issues and discontinuities will be
corrected for time period of Sept. 2001 - Dec
2002

• Next reprocessing (TERRA Collection 5)

• New cross-scan normalization based on individual
  detectors. This improves detector gain stability
  across the scan, thereby improving stripe
  removal.
• Sun glint correction using vector winds to
  improve the east-west adjacent swath edge
  consistency.
• Ocean BRDF correction

• Combined Terra and Aqua products

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TERRA Collection 4
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AQUA Collection 3
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Merged Terra, Aqua, SeaWiFS Chlor_a_2 January 19,
2003 full time series available in SeaWiFS 9km
format http//jeager.gsfc.nasa.gov/browsetool/
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Comparison of MODIS Chlorophyll ProductsJune
2001 Chlor_a_2
Chlor_a_3 (empirical)
(semi-analytical)
Note that Chlor_a_3 results are similar for
northern subtropics, but higher north of 40o N
and for upwelling areas, where it has adjusted to
higher-nutrient effects.
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Independent Validation Study Gregg and Casey, in
progress NODC SeaBASS, L-3 4.6km Quality Level
0, 1 Chlor_a_2 virtually identical performance
as for SeaWiFS r2 0.757 n1.6K vs 0.759
ngt4.5K Semi-analytic Chlor_a_3 shows improvement
r2 0.784 Regional analysis is underway.
Chlor-MODIS
Chlor_a_2
Chlor_a_3
Watson Gregg Nancy McCabe
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OCEAN PRODUCTIVITY from MODIS A New Baseline
Global average
Validated data period
Above Mixed layer Ocean Production Index
P2 Standard MODIS Product Collection 4
South Atlantic 10S to 50S
Esaias et al. Poster Compares Ocean Production
using MODIS, SeaWiFS, different
chlorophyll algorithms two production
models MODIS Semi-analytic chlorophyll results in
2 x greater production in the key Southern Ocean
regions, and phase differences, global total
between 57 and 59 GT C. SeaWiFS/MODIS
differences are relatively small.
Antarctic, S of 50S
Terra ONPP time series using chlorophyll from
SeaWiFS (green), MODIS Chlor_a_2(SeaWiFS analog)
(black), Chlor_MODIS(red), MODIS Chlor_a_3
Semi-analytic chlorophyll(blue) for global and 2
SO regions.
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Weekly FLH
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Weekly Productivity (P1)
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(From Frank Hoge and Paul Lyon)
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FLH vs. chlorophyll
FLH vs. CDOM
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Where to get data and more information

• Information locations
• MODIS Oceans home page
• http//modis-ocean.gsfc.nasa.gov
• MODIS Oceans QA Browse 36km Imagery (MQABI)
• http//jeager.gsfc.nasa.gov/browsetool/
• Select Terra collection 4
• Useful links to documentation and related web
  pages
• http//modis-ocean.gsfc.nasa.gov/doclinks.html
• Data Ordering locations
• NASA GES DAAC WHOM (NASA - Goddard DAAC)
• http//daac.gsfc.nasa.gov/
• Select Ocean color -gtMODIS-gtocean
• EOS DATA GATEWAY EDG
• - http//modis.gsfc.nasa.gov/data/ordering.html