1. 8th IOCCG Meeting in Florence, Italy (24-26 Feb 03) Current Status of MODIS (Terra and Aqua) by Chuck Trees for the MODIS Team Members

2. Brief MODIS History Definition Panel 1984 Selection of Instrument, Instrument Team - 1989 Restructuring - 1992 –MODIS-T out, PM MODIS-N in (6 MODIS-N’s) 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

3. TERRA MODIS NIGHTTIME 4  m SST MODIS/OCEAN GROUP GSFC, RSMAS -2 5 10 15 20 25 30 35 C o MAY 2001 V 3.3.1

4. MODIS SST Buoy and M-AERI retrieval Statistics Version 4.5 (new delivery) median = satellite - reference [MAERI or BUOY] BUOY M-AERI SST - new coefficients MedianStdDevNumber of Points –Terra all -0.07 0.4811027 –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 MedianStdDevNumber 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

5. AQUA, TERRA combined orbits nearly eliminate swath gaps Composite AQUA, TERRA SST Night Sept 29, 2002

6. Nearly Complete Single Day Global Coverage Composite Night (MODIS-T, MODIS-A) Day, Night - (AMSR, TMI) Prototype Sept 29, 2002, 0.25 O spatial resolution Kyle

7. 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

8. 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.

9. Next reprocessing (TERRA Collection 5) Combined Terra and Aqua products 1.New cross-scan normalization based on individual detectors. This improves detector gain stability across the scan, thereby improving stripe removal. 2.Sun glint correction using vector winds to improve the east-west adjacent swath edge consistency. 3.Ocean BRDF correction Next reprocessing Terra Collection 4 in May 2003 1. Calibration issues and discontinuities will be corrected for time period of Sept. 2001 - Dec 2002 Future Data Releases

10. TERRA Collection 4

11. AQUA Collection 3

12. Merged Terra, Aqua, SeaWiFS Chlor_a_2 January 19, 2003 full time series available in SeaWiFS 9km format http://jeager.gsfc.nasa.gov/browsetool/

13. 2000 2001 2002 Valid period 305-800

14. Comparison of MODIS Chlorophyll Products June 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 40 o N and for upwelling areas, where it has adjusted to higher- nutrient effects.

16. 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 r 2 = 0.757 n=1.6K vs 0.759 n>4.5K Semi-analytic Chlor_a_3 shows improvement r 2 = 0.784 Regional analysis is underway. Chlor-MODIS Chlor_a_3 Chlor_a_2 Watson Gregg & Nancy McCabe

19. OCEAN PRODUCTIVITY from MODIS : A New Baseline Validated data period 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. Above: Mixed layer Ocean Production Index P2 Standard MODIS Product Collection 4 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. Global average South Atlantic 10S° to 50°S Antarctic, S of 50°S

20. Weekly FLH

21. Weekly Productivity (P1)

22. (From Frank Hoge and Paul Lyon)

23. FLH vs. chlorophyll FLH vs. CDOM

26. Where to get data and more information Information locations: MODIS Oceans home page –http://modis-ocean.gsfc.nasa.govhttp://modis-ocean.gsfc.nasa.gov MODIS Oceans QA Browse 36km Imagery (MQABI) –http://jeager.gsfc.nasa.gov/browsetool/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 ->MODIS->ocean EOS DATA GATEWAY EDG - http://modis.gsfc.nasa.gov/data/ordering.html