The document summarizes the user engagement activities of the Ocean Colour Climate Change Initiative (OC-CCI) project. It discusses how the initial user consultation guided OC-CCI's work in Phase 1, presenting some key recommendations from users. It also previews some initial results from the Phase 2 user consultation, noting how initiatives like Blue Planet that bring together users and providers can influence research priorities. The document emphasizes maintaining dialogue between data providers and users.

1. User engagement within the Ocean Colour
Climate Change Initiative (OC-CCI) project
Shubha Sathyendranath,
Samantha Lavender, Victor Martinez Vicente, Mike Grant, Laurent
Bertino, Robert Brewin, Carsten Brockmann, Vanda Brotas, Stefano
Ciavatta, Andrei Chuprin, André Belo Couto, Alex Farman, Steve
Groom, Thomas Jackson, Anton Koroso, Hajo Krasemann, Frédéric
Mélin, Dagmar Müller, Trevor Platt, Peter Regner, Francois
Steinmetz, John Swinton, André Valente and Marco Zühlke

2. IOCCG Dartington 2011
Climate Change Initiative: Overview
ESA’s CCI deals with 13 Essential Climate Variables
– Atmospheric Group: Aerosol, Cloud, Green-House Gases, Ozone
– Ocean Group: Ocean Colour, Sea Ice, Sea Level, SST,
– Land Group: Fire, Glaciers, Ice Sheets, Land Cover, Soil Moisture
A 6 year programme
– Divided into 2 Phases (3 years each)
Scope of First Phase:
– Requirements Analysis including User Consultation
– Algorithm Specification
– Algorithm Development
– Essential Climate Variable Prototyping
– Essential Climate Variable Validation

3. IOCCG Dartington 2011
GCOS requirements: a major challenge
GCOS target
requirements
Current status
Band/product MERIS SeaWiFS MODIS GlobColour
SeaWifs
MODIS
MERIS
Accuracy 5%
5%
Radiance 412 nm
Radiance 490 nm
28%
19%
13%
14%
24%
14%
21%
12%
Temporal
resolution: daily 3d 1-2d 1-2d 1-2 d
Stability: 1% per
decade
Not specified
A major challenge to meet all the GCOS requirements: extremely high requirements
for the quality and long-term stability of the data (numbers not based on most recent
reprocessing; see also latest inputs through Mark Dowell to GCOS)
OC-CCI: Strong research component to quantify, and where possible, reduce errors

4. Cyclic Workflow

5. Phase 1 of OC-CCI: Initiated with
a User Consultation
This presentation is about:
•How the first user consultation guided the
activities of OC-CCI in Phase 1
•Some initial results from the user consultation
in Phase 2 in which Blue Planet played a
contributing role
• Some thoughts on how initiatives such as Blue Planet that brings together
the user community for societal benefits can influence research and
science priorities

6. Recommendations for Product Specification
• Make highest resolution data available, along with subsampling, binning,
mapping tools
• Important to provide normalised water-leaving radiances at full resolution,
along with online tools for generating products according to different
algorithms
• For all OC-CCI products, associate each product with error specification,
along with details of how the errors are estimated
• Ensure long-term, stable and sustained delivery of products to ensure
user base
• Move towards algorithms that have the potential to merge Case 1 and
Case 2 waters in a seamless manner

7. 16%
47%
6%
5%
3%
9%
3%
11%
USA Europe
Central-South America Japan
China Canada
India Others
CCI-OC Questionnaire, Phase 1
Partition of the sampled
population by location:
Note to Blue Planet
Community:
Opportunity to enhance
user feedback, especially
from undersampled
regions

8. Other variables of interest to users (beside Chl-a)
0 20 40 60 80 100
nLw
Kd
IOP
CDOM
SPM
PFT
PSD
OtherVariablesofinterest
% of total responses
EO
Scientists
Climate
Modellers
✔
✔
✔
✔
OC-CCI
Phase 1
✔
✔
✔
Other
ESA
Projects
✔
✔
✔
✔
✔
OC-CCI
Phase 2
User requirements more extensive than GCOS requirements
OC-CCI has responded by including additional products
ESA has made additional calls to address other requirements

9. 0
20
40
60
80
100
No Yes Not answer
%
EO Scientists
Modellers
The use of CZCS in climate studies
General low-level of interest in CZCS in the survey has affected commitment to
CZCS within OC-CCI.
Still, according to users, CZCS could be a useful tool for phenology or fisheries
studies if careful processing is made.

10. Data-handling tools currently in use:
a) EO scientists & b) Climate modellers

12. Preview of the 2015 survey results

13. Preview of the 2015 survey results

14. The Blue Planet Advantage
Blue Planet is a forum that brings together
providers and users of data and
information.
Its importance as a ready-made arena for
user consultation and user engagement
should not be underestimated.
More than ever, users have the opportunity
to influence science decisions.
Important to maintain the dialogue between
providers and users of data.
Thank you.

15. Estimation of the Relative Error (RE) caused by the CZCS sampling
The datasets:
(a) CZCS: weekly chl data over the period 1978-1986
(b) SeaWiFS06
: weekly chl data over the period 1998-2006
(c) SeaWiFS*: weekly chl data over the period 1998-2006 sampled like CZCS
(d) SeaWiFS: weekly chl data over the period 1998-2009
In (a),(b), and (c), the total number of weekly data is 353 weeks (= 7.7 yrs * 46
weeks), see Figure 1.
In (d), the total number is 506 weeks (= 11 yrs * 46 weeks)