MOBY Time Series - PowerPoint PPT Presentation

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MOBY Time Series

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Title: MOBY Time Series


1
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)
2
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

3
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
4
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

5
AQUA, TERRA combined orbits nearly eliminate
swath gapsComposite AQUA, TERRA SST Night Sept
29, 2002
6
Nearly Complete Single Day Global
CoverageComposite Night (MODIS-T, MODIS-A) Day,
Night - (AMSR, TMI) Prototype Sept 29, 2002,
0.25O 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
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

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
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14
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.
15
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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 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
17
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18
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19
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.
20
Weekly FLH
21
Weekly Productivity (P1)
22
(From Frank Hoge and Paul Lyon)
23
FLH vs. chlorophyll
FLH vs. CDOM
24
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25
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26
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
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