Within PREFACE, observational and modelling science were combined to enhance prediction of the Tropical Atlantic climate and its ecological and socio-economic impacts.
Use the links below for an overview of observations, models and experiments performed during PREFACE, and for access to data. For easier navigation, the descriptions of available data have been structured by the work package(s) leading to their collection and/or production.

  • WP3&4 Observational Data
  • EAF Nansen Programme data (WP4 & WP12): For information on available historic oceanographic and fisheries data from the EAF Nansen programme, go to the dedicated wiki.
  • WP5 coordinated ocean model experiments are summarised in tables in Milestones MS18 and MS19.
  • WP6 data corresponds to coordinated experiments to identify sources of forecast drift. The experiments were described in Milestone MS22. The coordinated experiments data are long-term archived in NIRD/NorStore. Milestone 23 lists all sensitivity experiments performed for Tasks 6.3 and 6.4. For further queries or access to data contact the project office.
  • WP7 data corresponds to the anomaly coupling data (coordinated coupled model experiments which are simulations with historical forcing used to address the relation between the mean state and simulated variability in the tropical Atlantic). This data is described in Milestone MS25 and Deliverable D7.2. For further queries or access to data contact the project office.
  • WP8 performed a variety of experiments with global coupled models aimed at understanding the interrelation of errors (in the mean and variability) in the Atlantic with other regions. Data resides at the originating institution and is available upon request. The table below, together with Milestones MS 26 and MS27 summarise experiments performed.
Simulation Model Period Resolution Special Features Objective
Anomaly coupling
NorESM 100yr long 2.5 lon by 1.9 lat, 23 levels Restore climatology to 1075-1995 period To study the impact of bias on variability (run from WP7)
Anomaly coupling
UCLA CGCM 100yr long 2.5 lon by 2 lat, 29 levels
Cos z 1 ucla
UCLA CGCM 25 yr long 2.5 lon by 2 lat, 29 levels Reduction of incoming solar radiation in the southern ocean To study of impact of remote biases in tropical biases and variability
Cos z 1 noresm NorESM 100 yr 2,5 lon by 1,9 lat, 23 levels
Cos z 2 ucla
UCLA-CGCM 80 yr long experiment 2,5 lon by 2 lat, 29 levels as above, but reduction only over the Atlantic sector of SO
Inter-basin connection ECHAM5/MPIOM 1950-2005 T63, L31 Ensemble simulations, partially coupled in the Atlantic and Pacific, respectively Evaluation impact of Atlantic SST variability on the Indo-Pacific
Inter-basin connection SPEEDY v.40 AGCM+1.5 layer ocean model 1871-2002 T30, 8 levels
North Atlantic Salinity bias KCM 1) 2000 yr control; 2) 100 yr resorting NA SSS to climatology;
3) fresh water flux correction
Atm: T42, 19 vertical levels
Ocean: NEMO ORCA2 31 levels
Flux corrected experiments Evaluate impact of improvements in the north Atlantic sea surface salinity fluxes on bias
  • WP9 performed a series of experiments to study the mechanisms for tropical Atlantic variability on seasonal and longer timescales, and their relation to variability elsewhere. The experiments are fully described in Milestone MS29. The table below shows a summary of model output data for WP9.
Simulation Model Period Domain Resolution Special Features Objective
Subtropical anticyclones-Equatorial mode NEMO 1958-2011 Tropical Atlantic ¼° horizontal resolution and 46 z-levels ranging from 5 m thickness in the upper 30 m to 200 m ATLTROP025 configuration Evaluation of inter-annual  SST variability in the tropical Atlantic and impacts
Impacts of the Equatorial Mode UCLA / SPEEDY Two periods: late XX Century, late XXI Century Global 2ºx2.5º 19 levels / t30 8 levels AGCM configuration
Two-way Atlantic-Pacific SPEEDY v.40 AGCM+1.5 layer ocean model 1871-2002 Global T30, 8 levels Partially coupled in the Atlantic and Pacific, respectively
Partially coupled AOGCM SPEEDY v41.5 + NEMO / mixed layer model XX Century Global T30, 8 levels Idealized sensitivity experiments Analysis of decadal variability and trends in tropical Atlantic
Atlantic subpolar gyre-TAV ECHAM6 high-top model Present and Future Global T63L47 Much larger extra-tropical SST anomalies applied

(Overview of planned experiments and models in PREFACE)