# Presentation: 257461

## Ocean Team SummaryChuck McClain

- MODIS Science Team Meeting
- July 13-15, 2004

## Field Program Coordination

- Need website that lists cruise opportunities, e.g. Repeat Hydrology cruises, Australian Antarctica cruises
- Field validation data collection has plummeted since end of SIMBIOS1 program in December.
- Data still sparse from many major regions (S. Pacific)
- Suggest IOCCG2 support this function.
- Data to be submitted to OCDP3 SeaBASS4
- SIMBIOS data policy to be maintained
- SeaBASS staff to contact sources of restricted data to see if policy can be waived for their submissions.

- 1  Sensor Intercomparison & Merger for Biological & Interdisciplinary Ocean Studies
- 2  International Ocean Color Coordination Group
- 3  Ocean Color Data Processing
- 4  SeaWiFS Bio-optical Archive & Storage System

## Product Suite & Ocean Algorithm Groups

- Groups to be lead by Ocean Team members
- Initial algorithm groups formed after NASA Ocean Biogeochemistry Annual Meeting in April
- Open to participation by non-team members
- Work with OCDP group on implementation & testing of recommended algorithms
- Groups
- Chl-a:  Trees, Campbell, Maritorena, Clark
- IOPs:  Lee, Carder, Gould, Stamnes
- AOPs:  McClain, Voss, Hooker, Clark, Wang, Mueller, Gordon, Carder, Evans, Kearns, Gould, Stumpf
- Includes Level-2 processing of some 250m bands
- FLH:  Letelier, Behrenfeld

- IOP: Inherent Optical Property
- AOP: Apparent Optical Property
- FLH: Fluorescence Line Height

## Ocean Algorithm Groups (continued)

- Kd(490):  Clark, Mueller, Trees
-  Provide recommendations on K(PAR)
- PP:  Behrenfeld
- Provide recommendation on SeaWiFS Chl-a/Kd(490) product, i.e., do we need to continue generating it?
- POC: Clark, Stramski
- PIC:  Balch, Gordon
- SST:  Minnett, Evans
- PAR:  Gregg
- CDOM:  Siegel, Nelson
- DOC:  not covered.  Related to CDOM
- Adding 250m, FLH, etc. bands requires significant revision of OC processing code.

## Data Quality

- SeaWiFS-MODIS/Aqua Lwn* ratios show:
- Seasonal cycle at high latitudes of ~ ±10%
- 3%/yr downward trend
- U. Miami group has made good progress on improving MODIS/Terra data quality
- Corrected polarization tables
- Detector order reversal corrected
- Striping & RVS! still issues for both sensors
- Oceans will evaluate Atmospheres destriping methodology

- * Normalized water-leaving radiance
- ! Response vs. Scan

## Lwn: MODIS/Aqua vs SeaWiFS 

-   Seasonal differences of  ±10% between SeaWiFS and MODIS/Aqua
- remain at high latitudes (high solar zenith) after polarization correction.
-   ~3% downward trend

**Northern Pacific**

**Southern Pacific**

**Equatorial Pacific**

## Calibration Working Group

**MOBY & SeaWiFS scheduled to end in December:  MODIS OC data quality afterwards?**
**Primary sources of calibration/evaluation data**
**Ocean biogeochemistry CDRs at risk**
- Jim Mueller (SDSU) & Carol Johnson (NIST) to host OC calibration workshop in October at NIST.
- Define methodology for estimating calibration error budget including vicarious calibration
- Consider future OC calibration system strategy and design (field instruments, sites, etc.)
- Continuation of calibration round-robin, measurement protocols, & instrument pool to be considered (need, funding, leadership issues)

## MODIS Team Leader Thrusts

- Data Access
- OCDP strategy for reduced file size (SeaWiFS format), SeaDAS support, and direct browse and distribution working extremely well (MODIS/Aqua distribution now exceeds SeaWiFS).
- Data Assimilation
- Ocean color product assimilation into numerical ecosystem models fairly recent development by a few research groups, but not operational centers.
- Assimilation of SST and perhaps Kd(490) most common.
- Different models require different formats & resolutions.
- Provide regridding/averaging tools rather than special products

## MODIS Team Leader Thrusts (cont.)

- Outreach
- Discussed approaches to “getting the word out”
- News worthy events captured in ocean imagery
- Early notification of publications & news-worthy scientific findings (early preparation for the “big splash”)
- Articles in popular magazines, e.g., National Geographic, Scientific American, Time, Newsweek, etc.
- Publication of ocean team annual report (similar to SIMBIOS annual reports)
- Other relevant considerations
- Annual formal science team performance reviews, e.g., telecon with each PI.
- Worked very well for the SIMBIOS Project
- Specific categories of performance defined by Procurement