CIOSS Ocean Optics Aug 2005 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

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

CIOSS Ocean Optics Aug 2005 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)

CIOSS Ocean Optics Aug 2005 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in coastal areas -Trend is different that previously observed previously between the 80s and 90s From Behrenfeld (unpublished)

CIOSS Ocean Optics Aug 2005

CIOSS Ocean Optics Aug 2005

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

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

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

CIOSS Ocean Optics Aug 2005

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

CIOSS Ocean Optics Aug 2005 Developing long term Ocean Color Products

CIOSS Ocean Optics Aug 2005 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

CIOSS Ocean Optics Aug 2005 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.

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

CIOSS Ocean Optics Aug 2005 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

CIOSS Ocean Optics Aug 2005 Normalized Water-leaving Radiances (nL w ) 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

CIOSS Ocean Optics Aug 2005 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

CIOSS Ocean Optics Aug 2005

CIOSS Ocean Optics Aug 2005