Version 4.2 Data Release

The latest version of the OC-CCI dataset is 4.2 that comprises of globally merged MERIS, Aqua-MODIS, SeaWiFS and VIIRS data with associated per-pixel uncertainty information, with the dataset extended to the end of 2019. This is an update of the version 4.0 and 4.1 products that had erroneous data within the Chlorophyll product (for v4.0):

The OC-CCI team noticed that the algorithm blending designed to optimise the chlorophyll-a product across a range of optical environments was corrupted in the operational code, with the consequence that the chlorophyll-a product released as part of OC-CCI v4.0 (released in June 2019) is based uniquely on the OC3 algorithm, rather than on blended algorithms. The chlorophyll-a product (and associated uncertainties) are the only products affected. We have now recomputed the chlorophyll-a product using the blending scheme and are releasing an updated v4.1 dataset. If you were using products such as Rrs, water class memberships or IOPs then the products remain unchanged, compared with v4.0.  Further details are available within http://esa-oceancolour-cci.org/sites/esa-oceancolour-cci.org/files/oc-cci_v4_diffs.pdf

and (for v4.1): Kd used value of bw instead of bbw

When using the OC-CCI data in publications please consider following our citing advice:  https://esa-oceancolour-cci.org/citing-oc-cci

Ocean Colour CCI

The Ocean Colour CCI (OC_CCI) project focuses on the Ocean Colour ECV encompassing water-leaving radiance in the visible domain, derived chlorophyll and inherent optical properties and will utilise data archives of from ESA’s MERIS and NASA’s SeaWiFS, MODIS and possibly CZCS (after careful evaluation) sensors archives. It is also looking at the feasibility of using OCM-2 and VIIRS data as a "gap filler" before the launch of Sentinel-3.

Downloading and extracting data

Access to several options, including FTP and the Composite Browser, is available via http://www.oceancolour.org/

The data can be directly downloaded from: ftp://oc-cci-data:ELaiWai8ae@oceancolour.org/

FTP server: oceancolour.org
Username: oc-cci-data
Password: ELaiWai8ae

Support is available from help@esa-oceancolour-cci.org

Some people have reported that the Mac FTP client has trouble with files bigger than 4GB. If you look at the monthly composites directory and the files there appear to be around 500-600MB rather than ~4.5GB, you're affected by this problem. If you attempt to download, you'll get ~500MB corrupt files. So you'll need to use an alternative FTP client or the terminal.

If you’re interested in downloading a subset of the dataset then THREDDS provides several options. As an example, the NetCDF subset service allows for a spatial and / or temporal subset to be extracted.

From https://rsg.pml.ac.uk/thredds/catalog-cci.html first choose the temporal composites required (daily, 8day or monthly) and then access Option 5, which is NetcdfSubset. Now choose the products, Latitude / Longitude subset and time subset options. Then press Submit at the bottom of the page.

If you receive an error message then it’s likely you’re trying to download too much data in one block – files cannot be larger than 4GB. The Stride parameter can be set to a value greater than 1 if you only want every nth value.

The output is a single NetCDF file and so this method will become unwieldy for large areas / time periods.If you’d prefer binary or ASCII data then choose Option 1, which is OPeNDAP.

To browse the data in an interactive viewer then the Web GIS Portal (http://www.oceancolour.org/portal/) is an option that can produce plots / graphics of the data as well as also exporting layers. First select the product(s) that you’re interested in, then select ‘Analysis’ that should be in the top right hand corner and choose what you’d like to do.

Citing OC-CCI information and data products when you use them

All OC-CCI products are free and open. However, we request all users to acknowledge the source of the data, whenever you publish any work based on them.

Acknowledgement:

Please include a general statement acknowledging OC-CCI data and/or assistance in the acknowledgement section of any article.

In addition, please cite the following references, as appropriate:

References:

The correct reference for OC-CCI products is:

Sathyendranath, S, Brewin, RJW, Brockmann, C, Brotas, V, Calton, B, Chuprin, A, Cipollini, P, Couto, AB, Dingle, J, Doerffer, R, Donlon, C, Dowell, M, Farman, A, Grant, M, Groom, S, Horseman, A, Jackson, T, Krasemann, H, Lavender, S, Martinez-Vicente, V, Mazeran, C, Mélin, F, Moore, TS, Müller, D, Regner, P, Roy, S, Steele, CJ, Steinmetz, F, Swinton, J, Taberner, M, Thompson, A, Valente, A, Zühlke, M, Brando, VE, Feng, H, Feldman, G, Franz, BA, Frouin, R, Gould, Jr., RW, Hooker, SB, Kahru, M, Kratzer, S, Mitchell, BG, Muller-Karger, F, Sosik, HM, Voss, KJ, Werdell, J, and Platt, T (2019) An ocean-colour time series for use in climate studies: the experience of the Ocean-Colour Climate Change Initiative (OC-CCI). Sensors: 19, 4285. doi:10.3390/s19194285

In addition, each of the versions of OC-CCI products have their own doi’s. Please provide reference to the appropriate doi’s:

Doi’s for OC-CCI Ocean-Colour products

Version 4.2:

Sathyendranath, S.; Jackson, T.; Brockmann, C.; Brotas, V.; Calton, B.; Chuprin, A.; Clements, O.; Cipollini, P.; Danne, O.; Dingle, J.; Donlon, C.; Grant, M.; Groom, S.; Krasemann, H.; Lavender, S.; Mazeran, C.; Mélin, F.; Moore, T.S.; Müller, D.; Regner, P.; Steinmetz, F.; Steele, C.; Swinton, J.; Valente, A.; Zühlke, M.; Feldman, G.; Franz, B.; Frouin, R.; Werdell, J.; Platt, T. (2020): ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a sinusoidal projection, Version 4.2. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/99348189bd33459cbd597a58c30d8d10

Version 3.1:

Sathyendranath, S.; Grant, M.; Brewin, R.J.W.; Brockmann, C.; Brotas, V.; Chuprin, A.; Doerffer, R.; Dowell, M.; Farman, A.; Groom, S.; Jackson, T.; Krasemann, H.; Lavender, S.; Martinez Vicente, V.; Mazeran, C.; Mélin, F.; Moore, T.S.; Müller, D.; Platt, T.; Regner, P.; Roy, S.; Steinmetz, F.; Swinton, J.; Valente, A.; Zühlke, M.; Antoine, D.; Arnone, R.; Balch, W.M.; Barker, K.; Barlow, R.; Bélanger, S.; Berthon, J.-F.; Beşiktepe, Ş.; Brando, V.E.; Canuti, E.; Chavez, F.; Claustre, H.; Crout, R.; Feldman, G.; Franz, B.; Frouin, R.; García-Soto, C.; Gibb, S.W.; Gould, R.; Hooker, S.; Kahru, M.; Klein, H.; Kratzer, S.; Loisel, H.; McKee, D.; Mitchell, B.G.; Moisan, T.; Muller-Karger, F.; O'Dowd, L.; Ondrusek, M.; Poulton, A.J.; Repecaud, M.; Smyth, T.; Sosik, H.M.; Taberner, M.; Twardowski, M.; Voss, K.; Werdell, J.; Wernand, M.; Zibordi, G. (2018): ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Version 3.1 Data. Centre for Environmental Data Analysis, 04 July 2018. doi:10.5285/9c334fbe6d424a708cf3c4cf0c6a53f5 http://dx.doi.org/10.5285/9c334fbe6d424a708cf3c4cf0c6a53f5


Version 2.0:

Sathyendranath, S, Groom, S, Grant, M, Brewin, RJW, Thompson, A, Chuprin, A, Horseman, A, Jackson, T, Martinez Vicente, V, Platt, T, Brockmann, C, Zühlke, M, Doerffer, R, Valente, A, Brotas, V, Krasemann, H, Müller, D, Dowell, M, Mélin, F, Swinton, J, Farman, A, Lavender, S, Moore, TS, Regner, P, Roy, S, Steinmetz, F, Mazeran, C, Brando, VE, Taberner, M, Antoine, D, Arnone, R, Balch, WM, Barker, K, Barlow, R, Bélanger, S, Berthon, J, Beşiktepe, Ş, Canuti, E, Chavez, F, Claustre, H, Crout, R, Frouin, R, García-Soto, C, Gibb, SW, Gould, R, Hooker, S, Kahru, M, Klein, H, Kratzer, S, Loisel, H, McKee, D, Mitchell, BG, Moisan, T, Feldman, G, Franz, B, Muller-Karger, F, O'Dowd, L, Ondrusek, M, Poulton, AJ, Repecaud, M, Smyth, T, Sosik, HM, Twardowski, M, Voss, K, Werdell, J, Wernand, M, Zibordi, G (2016) ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Version 2.0 Data. Centre for Environmental Data Analysis, 20 December 2016. doi:10.5285/b0d6b9c5-14ba-499f-87c9-66416cd9a1dc http://dx.doi.org/10.5285/b0d6b9c5-14ba-499f-87c9-66416cd9a1dc

Version 1.0:

Sathyendranath, S, Groom, S, Grant, M, Brewin, RJW, Thompson, A, Chuprin, A, Horseman, A, Jackson, T, Martinez Vicente, V, Platt, T, Brockmann, C, Zühlke, M, Doerffer, R, Valente, A, Brotas, V, Krasemann, H, Müller, D, Dowell, M, Mélin, F, Swinton, J, Farman, A, Lavender, S, Moore, TS, Regner, P, Roy, S, Steinmetz, F, Mazeran, C, Brando, VE, Taberner, M, Antoine, D, Arnone, R, Balch, WM, Barker, K, Barlow, R, Bélanger, S, Berthon, J, Beşiktepe, Ş, Canuti, E, Chavez, F, Claustre, H, Crout, R, Frouin, R, García-Soto, C, Gibb, SW, Gould, R, Hooker, S, Kahru, M, Klein, H, Kratzer, S, Loisel, H, McKee, D, Mitchell, BG, Moisan, T, Feldman, G, Franz, B, Muller-Karger, F, O'Dowd, L, Ondrusek, M, Poulton, AJ, Repecaud, M, Smyth, T, Sosik, HM, Twardowski, M, Voss, K, Werdell, J, Wernand, M, Zibordi, G (2016) ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Version 1.0 Data. Centre for Environmental Data Analysis, 20 December 2016. doi:10.5285/E32FEB53-5DB1-44BC-8A09-A6275BA99407. http://dx.doi.org/10.5285/E32FEB53-5DB1-44BC-8A09-A6275BA99407

OC-CCI in situ databases

Version 2:

Valente, A, Sathyendranath, S, Brotas, V, Groom, S, Grant, M, Taberner, M, Antoine, D, Arnone, R, Balch, WM, Barker, K Barlow, R, Bélanger, S, Berthon, J-F,  Besiktepe, S, Borsheim, Y, Bracher, A, Brando, V, Canuti, E, Chavez, F, Cianca, A, Claustre, H, Clementson, L, Crout, R, Frouin, R, García-Soto, C, Gibb, SW, Gould, R, Hooker, SB, Kahru, M, Kampel, M, Klein, H, Kratzer, S, Kudela, R, Ledesma, J, Loisel, H, Matrai, P, McKee, D, Mitchell, BG, Moisan, T, Muller-Karger, F, O’Dowd, L, Ondrusek, M, Platt, T, Poulton, AJ, Repecaud, M, Schroeder, T, Smyth, T, Smythe-Wright, D, Sosik, HM, Twardowski, M, Vellucci, V, Voss, K, Werdell, J, Wernand, M, Wright, S, and Zibordi, G (2019) A compilation of global bio-optical in situ data for ocean-colour satellite applications – version two. Earth Syst. Sci. Data, 11, 1037–1068. https://doi.org/10.5194/essd-11-1037-2019

Version 1:

Valente, A, Sathyendranath, S, Brotas, V, Groom, S, Grant, M, Taberner, M, Antoine, D, Arnone, R, Balch, W, Barker, K, Barlow, R, Bélanger, S, Berthon, JF, Besiktepe, S, Brando, V, Canuti, E, Chavez, F, Claustre, H, Crout, R, Frouin, R, Garcìa-Soto, C, Gibb, SW, Gould, R, Hooker, S, Kahru, M, Klein, H, Kratzer, S, Loisel, H, McKee, D, Mitchell, BG, Moisan, T, Muller-Karger, F., O'Dowd, L, Ondrusek, M, Poulton, A, Repecaud, M, Smyth, T, Sosik, HM, Twardowski, M, Voss, K, Werdell, J, Wernand, M, Zibordi, G (2016) A compilation of global bio-optical in situ data for ocean-colour satellite applications. Earth Syst. Sci. Data, 8, 235–252, 2016www.earth-syst-sci-data.net/8/235/2016/doi:10.5194/essd-8-235-2016