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CIOSS Ocean Optics

CIOSS Ocean Optics. Ocean Optics, Cal/Val Plans, CDR Records for Ocean Color Ricardo M Letelier Oregon State University. Outline - Defining Ocean Color products and their use Cal/Val issues with special emphasis in coastal environments

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CIOSS Ocean Optics

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  1. CIOSS Ocean Optics Ocean Optics, Cal/Val Plans, CDR Records for Ocean Color Ricardo M Letelier Oregon State University • Outline • - Defining Ocean Color products and their use • Cal/Val issues with special emphasis in coastal • environments • Developing NOAA’s capability for ocean color CDRs •  Outcome of our first workshop Aug 2005

  2. CIOSS Ocean Optics HES-CW Threshold & Goal Channels and their Applications Aug 2005

  3. CIOSS Ocean Optics Uses for Ocean Color Products • Near real-time observations over regional scales - for short term forecasting (i.e. human and ecosystem health, navigation hazards) - to study ecosystem response to physical forcings (i.e. nat. res. management) • Long term time-series to characterize seasonal, inter-annual and decadal changes (landscape change, ecosystem climate response) Aug 2005

  4. CIOSS Ocean Optics • From Gregg et al. 2005: • Looking at interannual variability in global annual chlorophyll distribution •  4% global increase • Changes are not uniform •  Increases in coastal areas • Trend is different that previously observed previously between the 80s and 90s From Behrenfeld (unpublished) Aug 2005

  5. CIOSS Ocean Optics Aug 2005

  6. CIOSS Ocean Optics Aug 2005

  7. CIOSS Ocean Optics nLw consistency & In Situ Verification Field Validation: Lwn’s Temporal Consistency * Lwn: Normalized Water-leaving Radiance From NASA / Ocean Color Processing Group Aug 2005

  8. CIOSS Ocean Optics From nLw to ocean color products Reflectance spectrum as a function of [chl a] 1 CIOSS postdoc worked on the processing of the Oregon Coast optics and SeaWiFS/MODIS match-up data (2003-2004) COAS-OSU Direct Broadcast Aug 2005

  9. GLOBEC NEP AUGUST 2002 chlFLH empirical (this study) In situ chl MODIS chla_2 CIOSS Ocean Optics Aug 2005

  10. CIOSS Ocean Optics Aug 2005

  11. CIOSS Ocean Optics Inverse bio-optics approach using the merging of concurrent remote sensing datasets SeaWiFS MODIS Terra/Aqua In situ Bio-optics In situ discrete samples Oregon Datasets From Maritorena & Siegel (2005) Aug 2005

  12. CIOSS Ocean Optics Developing long term Ocean Color Products Aug 2005

  13. CIOSS Ocean Optics A Consistent Ocean Color Time Series Requires Similar: • Calibration • Algorithms • Spatial and Temporal Resolution (Level-3) • Data Format • Access • Analysis Tools • Quantification of errors and biases Aug 2005

  14. CIOSS Ocean Optics Information Flow L1A data  Navigate, calibrate (vicarious)  L2 algorithms (input ancillary fields of humidity, ozone, wind speed, surface pressure)  Binning in space and time  L3 fields • Satellite/sensor information appended to L1A • Issues regarding preserving geometry, etc. for VIIRS • Differences between “level” world and IPO definitions of RDR, SDR, EDR, etc. Aug 2005

  15. CIOSS Ocean Optics Climate Data Records • Chlorophyll (global) as Thematic Climate Data Record (TCDR) • May be others in the future as knowledge improves • nLwas Fundamental Climate Data Record (FCDR) • We require saving these at full resolution of sensor • Assumes that Level 1A data are preserved Aug 2005

  16. CIOSS Ocean Optics Chlorophyll as TCDR • Ensuring consistency across multiple platforms • Challenging in NPOESS era given launch-on-failure strategy • Sensor overlap greatly facilitates creation of consistent data records • Sensor pre-launch & on-orbit characterization • Looking at the Moon • Need access to solar diffuser data • Defining resolution scales • In situ data • Vicarious calibration • Validation • Intercalibration of in situ sensors • Need more than one sites? • Archive services • Documentation • Data access and Formats • Processing & reprocessing • Need science-focused processing system Aug 2005

  17. CIOSS Ocean Optics Normalized Water-leaving Radiances (nLw) as FCDR • Ancillary data fields • Documentation on models • Versions of fields • Current version of vicarious calibration • Ocean Color Project experience • Ensembles of tables, input fields, etc. • Validation • Need SeaBASS-like system for in situ data Aug 2005

  18. CIOSS Ocean Optics Roles and Responsibilities • There is a continuing need for NASA involvement, given its extensive experience in ocean color and its focus on scientific research • NOAA needs to begin to develop its own capacity to produce CDRs • Next step will be a workshop focusing on the end-to-end processes needed to meet the science requirements for ocean color CDRs • Workshop will be held on the East Coast to ensure involvement from NASA and NOAA Aug 2005

  19. CIOSS Ocean Optics Aug 2005

  20. CIOSS Ocean Optics Aug 2005

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