definitions of chl from MODIS and VIIRS
1) Are these definitions correct?
chlor_a: ? chl-a calculated using Hu et al. (2012) doi:10.1029/2011JC007395 for lower values and OC3 (see O'Reilly et al. NASA Tech. Memo. 2000-206892) for higher values? (Only Hu et al. is cited within the data files but I see this description of the combined algorithm elsewhere.)
chl_ocx: ? chl calculated using the OC3 algorithm (see O'Reilly et al. NASA Tech. Memo. 2000-206892)?
chl_gsm: ? chl calculated using the GSM algorithm (see Maritorena et al. (2002) doi:10.1364/AO.41.002705)?
2) Do the chl_ocx and chl_gsm values represent chl a or total chl?
3) Are there any general conclusions about the differences between these 3 products and conditions under which one should be preferred or avoided? Given there is only an ATBD for chlor_a, and chl_ocx is incorporated into its calculation, do you in general recommend chlor_a over the others?
Thanks in advance for any feedback!