1. A comparison between the IOCCG Simulated Data Set and NOMAD V2 from an OWT perspective Timothy S. Moore University of New Hampshire GIOP meeting Sept. 25, 2010 Anchorage Alaska

2. OWTNOMAD* w/ IOPs IOCCG Sim. Global Avg. 13 (9)731 28 (14)831 318 (17)1021 420 (26)49 519 (14)104 622 (13)402 79 (7)201 82 (1)1<1 Distribution of OWTs in Data sets vs. Ocean Obsverations (numbers are in percent) * - AOP without matching IOPSs

3. N=41 N=45 N=180 N=91 N=6 N=19 N=45 N=43 OWT 1 OWT 2 OWT 3 OWT 4 OWT 5 OWT 6 OWT 7 OWT 8

4. ag411 OWT 1 OWT 4 OWT 3 OWT 2 OWT 5 OWT 6 OWT 7 OWT 8

5. bbp slope

6. aph

7. aph 443

8. Comparison to NOMAD data

9. IOCCG OWT 1 NOMAD ag s

10. IOCCG NOMAD log ag443 OWT 1 log aph443ag443/at443bbp slope

11. log ag443 bbp slope log aph443 OWT 2 IOCCG NOMAD -2.5-2-1.50.5-0.50-2.5-2-1.5-0.50 00.511.5 3.5 2.532 ag443/at443

12. OWT 3 log ag443 bbp slope log aph443 IOCCG ag443/at443

13. OWT 4 log ag443 bbp slope log aph443 IOCCG ag443/at443

14. OWT 5 log ag443 bbp slope log aph443 IOCCG ag443/at443

15. OWT 6 log ag443 bbp slope log aph443 IOCCG ag443/at443

16. OWT 7 log ag443 bbp slope log aph443 IOCCG ag443/at443

17. OWT 8 log ag443 bbp slope log aph443 IOCCG ag443/at443

18. All

19. Summary There are some inconsistencies in the OWT-based distributions of IOPs between NOMAD and the IOCCG simulated data set. Both data sets are skewed towards coastal/case 2 waters. Both data sets have some questions regarding the spectral slope of CDOM. If a new simulated data set is being considered, the generation of IOPs and IOP pairs could be further constrained by the variance and co-variance as seen in NOMAD within different OWTs. In addition, the representation of data points could be guided by the global distribution of naturally occurring OWTs.