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WGSF: in situ issues

Working Group on Surface Fluxes In situ issues Elizabeth Kent National Oceanography Centre, Southampton. WGSF: in situ issues. OceanObs'09 Community White Paper

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WGSF: in situ issues

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  1. Working Group on Surface FluxesIn situ issuesElizabeth Kent National Oceanography Centre, Southampton

  2. WGSF: in situ issues • OceanObs'09 Community White Paper • Fairall, C. & Co-Authors (2010). "Observations to Quantify Air-Sea Fluxes and Their Role in Climate Variability and Predictability" in Proceedings of OceanObs’09: Sustained Ocean Observations and Information for Society (Vol. 2), Venice, Italy, 21-25 September 2009, Hall, J., Harrison D.E. & Stammer, D., Eds., ESA Publication WPP-306. • http://www.oceanobs09.net/blog/?p=73 • Plenary Paper • Surface Energy, CO2 Fluxes And Sea Ice - led by Gulev and Josey • https://abstracts.congrex.com/scripts/jmevent/abstracts/FCXNL-09A02b-1869230-1-gulev_etal_OceanObs09_revision_final.pdf

  3. WGSF: in situ issues • OceanSITES should be expanded • Maintain existing network measuring radiative fluxes, mean meteorology and precipitation • Priorities for expansion: subpolar, high latitudes (high variability) and regions with severe weather conditions • Improved technology required to measure direct fluxes, including gases and particles • More high quality routine flux measurements • Requires more co-ordination of activities • Mainly Research Vessels but also selected commercial ships • Some vessels making similar measurements to OceanSITES • Others with direct fluxes, currents, directional wave spectra and other sea state information • Focused on high variability regions and gaps in OceanSITES network

  4. WGSF: in situ issues • Voluntary Observing Ships should be maintained and enhanced as a flux observation network • Focus on good quality observations, well characterised with metadata • Need for all elements, including visual clouds, weather and sea state • Improved technology • Increased power and bandwidth for moorings • More robust and capable platforms • Improved & low power gas flux sensors (inc. CO2, O3, SO2 and DMS) • Accurate, low cost, precipitation sensors • Improved humidity sensors for long term deployments

  5. WGSF: in situ issues • Flux observing best practice • WGSF "Flux handbook" ftp://ftp.etl.noaa.gov/user/cfairall/wcrp_wgsf/flux_handbook/ • Standards for sensor choice, siting, calibration and metadata • Improvement of flux parameterisations • Continual process • Observations needed under all conditions • Wide variety of related information required • Better models of ocean near surface temperature change with depth

  6. WGSF: in situ issues • A range of independent, gridded flux datasets is needed • Range of input data sources • Improved construction techniques required, with uncertainties • Wider range of fluxes and related variables (inc. e.g. biogeochemical, particles, whitecap fraction) • Clearly documented, metadata to allow appropriate choice of product for application • Data stewardship • Benefits of aggregation of high quality flux data • Ease of access should be improved • Again, more metadata on dataset characteristics and suitable applications.

  7. WGSF: other issues • Satellite data priorities: • Improved precipitation • Improved near surface air temperature and humidity • Whitecap characteristics • Improved sampling for vector winds (inc high wind and rain) • Improved temporal coverage and higher spatial resolution for passive and active microwave sensors, esp. in coastal regions • Improved validation and parameterisation for NWP and reanalyis model fluxes • Collaboration of observationalists, dataset developers and modellers • High quality flux datasets needed • Facilitated by SURFA, set up by WGSF and WGNE • http://www.ncdc.noaa.gov/oa/rsad/air-sea/surfa.html

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