The main goal of ERA-CLIM2 is to apply and extend the current global reanalysis capability in Europe, in order to meet the challenging requirements for climate monitoring, climate research, and the development of climate services. The five main objectives for the ERA‐CLIM2 project (see Section B1.1 of Annex I of the Grant Agreement) are:

1. Production of an ensemble of 20th-century reanalyses at moderate spatial resolution, using a coupled atmosphere-ocean model, which will provide a consistent data set for atmosphere, land, ocean, cryosphere, including, for the first time, the carbon cycle across these domains;
2. Production of a new state-of-the-art global reanalysis of the satellite era at improved spatial resolution, which will provide a climate monitoring capability with near-real time data updates;
3. Further improvement of earth-system reanalysis capability by implementing a coherent research and development program in coupled data assimilation targeted for climate reanalysis;
4. Continued improvement of observational data sets needed for reanalysis, in-situ as well as satellite-based, with a focus on temporal consistency and reduction of uncertainties in estimates of essential climate variables;
5. Development of tools and resources for users to help assess uncertainties in reanalysis products.

The 2nd General Assembly will provide the ERA-CLIM2 partners and contributors the forum to assess progress since the 1st General Assembly, discuss open and outstanding scientific and technical issues, and plan how best to advance work to achieve its objectives.

Meeting agenda

Presentations

Introduction R Buizza
Overview of WP1 P Laloyaux
Status, plans and first CERA results P Laloyaux
Ocean initialisation and monitoring for CERA E de Boisseson
Initial diagnostics on CERA-20C ensemble performance P Dahlgren
Monitoring tools for CERA D Schepers
Surface observation usage S Hirahara
CERA-LAND P Peylin
CERA data server P Laloyaux
Overview of WP3 S Brönnimann
Upper Air, surface and snow data deliverables contributed by RIHMI to WP3 A Sterin
Progress on Météo France work S Jourdain
Progress on digitising Portuguese and Chilean surface data plus Spanish pilot balloon data M A Valente
ERA-CLIM2 Global Registry M A Valente
Progress on Met Office work N Rayner
Satellite data records for ERA-CLIM2 R Roebeling
Progress on FMI work J Pulliainen
Overview of WP2 M Martin
Improved assimilation of SST observations M Martin
Improved assimilation of sea-ice observations C-E Testut
Use of ensemble information and development of efficient 4D-Var in ocean analysis A Weaver
Generation of ocean ensemble information A Storto
Land carbon developments P Peylin
Ocean biogeochemistry in reanalysis M Gehlen
Strengths/weaknesses of weakly coupled DA, coupled error covariance estimation and developing bias correction methods for coupled reanalysis K Haines
Strongly coupled DA in simplified systems F Lemarié
Overview of WP4 L Haimberger
Homogenization tests on surface data using 20CR and ERA20C as reference series M A Valente
Precipitation assessment with focus on station density, convective and stratiform precipitation E Rustemeier
Input uncertainties for carbon estimates P Peylin
On reproducing rescued UA data for the 50's of last century  and IGRA dataset by  reanalyses A Sterin
Radiosonde humidity bias adjustments using reanalysis background departures M Blaschek
Radiosonde bias adjustments as input for ERA5 L Haimberger
Results from ERA-preSAT – Chances and challenges of assimilating pre-IGY upper air data S Brönnimann (presented by L Haimberger)
Report of WG discussion: WP1 and WP2 All
Report of WG discussion: WP3 and WP4 All
WP1 plan for 2016 M Alonso-Balmaseda
WP2 plan for 2016 M Martin
WP3 plan for 2016 J Schulz
WP4 plan for 2016 L Haimberger
Review and comments S Uppala and D Bromwich
Looking ahead Chaired by R Buizza