© Crown copyright Met Office WGNE activities and future directions Andy Brown.

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Presentation transcript:

© Crown copyright Met Office WGNE activities and future directions Andy Brown

© Crown copyright Met Office Role of WGNE Working Group on Numerical Experimentation Jointly established by the WCRP and the WMO Commission for Atmospheric Sciences (CAS) Responsibility of fostering the development of atmospheric circulation models for use in weather prediction and climate studies on all time scales and diagnosing and resolving shortcomings. A distillation of the Terms of Reference….. Advice, liaison Co-ordinated experiments Workshops, publications, meetings

© Crown copyright Met Office Co-ordinated experiments and projects

© Crown copyright Met Office Transpose-AMIP GOOD PROGRESS Cloudy-radiance DONE Grey-zone GOOD PROGRESS Verification NWP performance (eg TCs, precipitation) ONGOING Polar (CBS-style; ConcordIASI intercomparsion) DONE PPP Climate metrics GOOD PROGRESS Issues with verification against own analysis NEW MJO / Boreal Summer Intraseasonal Oscillation intercomparisons (with MJO-TF) ONGOING / NEW Importance of aerosols for weather and climate DISCUSSION WGNE PROJECT TO BE SPUN UP Quality of monsoon simulations for weather and climate DISCUSSION WGNE 2012 Comparison of model momentum budgets NEW

© Crown copyright Met Office Workshops and meetings

© Crown copyright Met Office GOV/WGNE Ocean coupling workshop Washington, USA. 19th-22nd March 2013 Follow on to ECMWF (2008) and Met Office (2009) workshops Focus on coupled modelling for short and medium range Use of short-range coupled to understand issues for longer range (e.g. subseasonal-seasonal)

© Crown copyright Met Office 4th WGNE Workshop on Systematic Errors in Weather and Climate Models Met Office, Exeter, UK. 15th- 19th April 2013 Weather and climate Nature and causes of errors Use of diagnostic techniques, observations, process models and simplified experiments to understand errors

WGNE systematic errors meeting Key outcomes Challenged by lack and/or inaccessibility of observations (& uncertainties): Surface fluxes (e.g. Argo floats) Polar data (clouds, sea-ice volume, etc.) Wide range of diagnostic techniques to identify the timescale on which errors develop (Transpose-CMIP), supported by well organised data availability in common formats. This needs to have good links across the communities (e.g. Climate, seasonal, NWP) Develop link between dynamics & physics in diagnostic methods (e.g. PDP work; clouds grand challenge) Quality of (re-)analyses (esp. Tropics & Poles). Diagnostic packages to for centres to run themselves (repository?). Common model configurations to different MIPs. Linked to this, model configurations being analysed need to be more relevant to modelling centres (implication for CMIP6; Uni/Op centre links).

© Crown copyright Met Office Future directions Short-range weather prediction Changing focus – cloud, rain, surface temperature (not Z500!) Increased emphasis on high resolution – especially convection permitting Grey-zone project Appropriate metrics for high resolution models (with JWGVR) and routine use of them Link to climate downscaling? 25km 1.5km

© Crown copyright Met Office Future directions Earth system prediction Weather models coupled to ocean, composition, air quality, hydrology, ice..... Bringing together communities (GODAE coupling workshop; systematic errors meeting) Importance of aerosol for NWP: review and test cases TRANSPOSE-CMIP? Time evolution of coupled model SST errors

© Crown copyright Met Office Future directions “Traditional model evaluation development” Still important – and importance under-recognized Champion (with partners) e.g. Conferences Specific projects to engage community and tackle key issues Boreal ISV Grey zone Drag Dynamical cores (Workshops, Review of Centre Plans, Next steps?) Stratosphere (resolution, QBO)? Stochastic Physics?

Daisuke Hotta, JMA

© Crown copyright Met Office Future directions “Traditional model evaluation development” Still important – and importance under-recognized Champion (with partners) e.g. Conferences Specific projects to engage community and tackle key issues Boreal ISV Grey zone Drag Dynamical cores (Workshops, Review of Centre Plans, Next steps?) Stratosphere (resolution, QBO)? Stochastic Physics?

© Crown copyright Met Office Future directions Continue to look cross-timescale – weather and climate (and air quality/chemistry) communities together Need to keep championing the importance of model development Maintain strong links to many other groups and projects e.g. WWRP, DAOS, GASS, polar, subseasonal-seasonal, WGCM, SPARC, WMAC, GODAE Open questions and challenges Involvement in data assimilation; relation to mesosale working group Maintaining active portfolio of projects and workshops/conferences

© Crown copyright Met Office Questions?

Project sessions this week… Project sessions this week Stable boundary layers The diagnosis of cloud and radiation processes in models Weak temperature gradient Grey-zone project Microphysics modelling (KiD) LoCo/SGP Testbed (GLASS project) Marine Boundary Layer Cloud Feedbacks (CGILS) Land-Atmosphere Interactions (GLASS/GABLS joint project) Radiative Processes in Observations and Models Cirrus Tropical Convection observed during CINDY/DYNAMO Polar Clouds (ISDAC) Stratocumulus-to-trade cumulus transition Vertical structure and diabatic heating of the MJO