Title: MOBY Time Series
1Current Status of MODIS (Terra and
Aqua) by Chuck Trees for the MODIS Team
Members
8th IOCCG Meeting in Florence, Italy (24-26 Feb
03)
2Brief 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
3TERRA MODIS NIGHTTIME 4mm SST
MAY 2001 V 3.3.1
-2 5 10 15 20 25 30 35 Co
MODIS/OCEAN GROUP GSFC, RSMAS
4MODIS 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
5AQUA, TERRA combined orbits nearly eliminate
swath gapsComposite AQUA, TERRA SST Night Sept
29, 2002
6Nearly Complete Single Day Global
CoverageComposite Night (MODIS-T, MODIS-A) Day,
Night - (AMSR, TMI) Prototype Sept 29, 2002,
0.25O spatial resolution
Kyle
7MODIS 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
8MODIS 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.
9Future 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
10TERRA Collection 4
11AQUA Collection 3
12Merged 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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14Comparison 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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16Independent 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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19OCEAN 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.
20Weekly FLH
21Weekly Productivity (P1)
22(From Frank Hoge and Paul Lyon)
23FLH vs. chlorophyll
FLH vs. CDOM
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26Where 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