SFSPA and OPA Document No. 4 SFSPA and OPA Document No. 4.2(2) Additional Observational Requirements from the ¨WMO Rolling Review of Requirements Etienne Charpentier Chief, WMO Observing Systems Division JCOMM-5, 25-29 October, Geneva

WMO Application Areas Global Numerical Weather Prediction Definition: an activity involving primary use of observations, in a chain of activities which allow NMHSs or other organizations to render services contributing to public safety, socio-economic well-being and development in their respective countries, in a specific domain related to weather, climate and water. The concept of a WMO Application Area is used in the framework of the WMO Rolling Review of Requirements (RRR) and describes a homogeneous activity for which it is possible to compile a consistent set of observational user requirements agreed by community experts working operationally in this area. Global Numerical Weather Prediction High Resolution Numerical Weather Prediction Nowcasting and Very Short Range Forecasting Sub-seasonal to longer predictions Aeronautical Meteorology Forecasting Atmospheric Composition Monitoring Atmospheric Composition Providing Atmospheric Composition information to support services in urban and populated areas Ocean Applications Agricultural Meteorology Hydrology Climate Monitoring (GCOS) Climate Applications (Other aspects, addressed by the Commission for Climatology) Space Weather Climate Science Cross cutting: Global Cryosphere Watch (GCW) Global Framework for Climate Services (GFCS)

Long term vision of global observing systems Rolling Review of Requirements (RRR) and Evolution of Global Observing Systems Long term vision of global observing systems Application Areas Critical review User requirements Statements of Guidance (gap analysis) Impact Studies (e.g. NWP5) Priorities, cost effectiveness Observing Systems Capabilities (Space & Surface) (OSCAR) Implementation Plan (EGOS-IP) Members’ and Space Agencies Observation Programmes 3

Critical variables for ocean applications (annex to draft Decision 4 Sea surface height anomaly - high impact on ocean forecasting systems Sea level – wide range of requirements for sea level data from early detection of tsunamis to long-term trends of sea level rise) Wave parameters – extreme wave and wind gust events significantly constrain shipping and other marine operations (collocate wind and wave sensors required) Surface pressure – SLP from drifting and moored buoys to detect and monitor atmospheric phenomena over the oceans (e.g. tropical cyclones) that significantly constrain shipping Visibility –critical for operations and still very limited

ADDITIONAL OBSERVATION REQUIREMENTS FROM WMO ROLLING REVIEW OF REQUIREMENTS (RRR) (JCOMM-5-d04-2(2)-ROLLING-REVIEW-REQUIREMENTS-draft1_en) This document includes 1 proposed decision: draft Decision 4.2(2)/1 — Contribution to the Rolling Review of Requirements; Annex includes critical marine meteorological and oceanographic variables where JCOMM has identified gap Observations Programme Area requested to consider in its workplan, and in dialogue with funders and implementers of the observing networks, how these critical variables could be better observed SFSPA is requested to assist the Point of Contact for Ocean Applications in reviewing and updating the Statement of Guidance for Ocean Applications Members/Member States are urged to contribute to the implementation of meto-oceano observing systems for achieving the implementation targets of ocean observing networks & pay attention to the critical variables in the Annex