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Von P. Walden, U. Idaho Matthew Shupe, U. Colorado

Cloud Properties across the Arctic Basin from surface and satellite measurements An existing Arctic Observing Network. Von P. Walden, U. Idaho Matthew Shupe, U. Colorado. Science Questions. What are the macrophysical and microphysical properties of clouds at various locations in the Arctic?

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Von P. Walden, U. Idaho Matthew Shupe, U. Colorado

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  1. Cloud Properties across the Arctic Basin from surface and satellite measurementsAn existing Arctic Observing Network Von P. Walden, U. Idaho Matthew Shupe, U. Colorado

  2. Science Questions • What are the macrophysical and microphysical properties of clouds at various locations in the Arctic? • How do Arctic cloud properties vary both temporally and spatially? • How do the spatial and temporal variability of Arctic cloud properties depend upon regional forcing parameters? • Do satellite retrievals yield similar properties and variability to the coincident surface-based measurements?

  3. An Existing AON Beaufort Sea SHEBA/ARM (1997 – 1998) Barrow North Slope of Alaska ARM (1998 – curr) Tiksi SEARCH (2007 - ?) Eureka CANDAC – SEARCH (2005 – curr) Ny’Alesund European collab (mid 1970s – curr)

  4. Instruments Measurements Derived Cloud Products Sites and Dates Millimeter Cloud Radar (MMCR) Reflectivity, mean Doppler velocity, spectrum width, and the Doppler spectrum Presence, vertical location, boundaries, phase, microphysics, limited dynamical properties SHEBA 1997-1998 NSA 1998 –> Eureka 2005 –> Atmospheric Emitted Radiance Interferometer (AERI) Spectral infrared radiance Presence, phase, optical depth, emissivity, microphysics SHEBA 1997-1998 NSA 1998 –> Eureka 2006 –> Multi-channel Microwave Radiometer (MWR) Brightness temperatures at various channels Integrated and/or vertically-resolved precipitable water vapor and condensed liquid water amounts SHEBA 1997-1998 NSA 1998 –> Eureka 2006 –> Depolarization Lidar (DABUL, MPL, HSRL) Backscatter, depolarization ratio Presence, vertical location, boundaries, phase, optical depth microphysics, aerosol properties SHEBA 1997-1998 NSA 1998 –> Eureka 2005 –> Baseline Surface Radiation Network (BSRN) suite or equivalent Broadband, upwelling and downwelling, shortwave and longwave, direct and diffuse, radiative fluxes Cloud and atmospheric radiative properties SHEBA 1997-1998 NSA 1998 –> Eureka, planned 2007 Rawinsonde Profiles of temperature, moisture, wind speed and direction Cloud temperature SHEBA 1997-1998 NSA 1998 – present Barrow <1998 –> Eureka <1998–> Surface Meteorology Temperature, pressure SHEBA 1997-1998 NSA 1998 – present Eureka <1998 –> Precipitation Precipitation amount and/or rate SHEBA 1997-1998 NSA/CMDL 1970s –> Existing Instrumentation

  5. Data Management Plan • Current data archives: • Data at http://www.esrl.noaa.gov/psd/psd3/arctic • Near real-time access and display at http://lidar.ssec.wisc.edu • Future data products for archival (netcdf) from 3 to 5 Arctic stations: • Time-height cloud properties data sets above Arctic atmospheric observatories • cloud water content, particle size, extinction for both liquid and ice phases, cloud water path, optical depth, vertical location, presence, cloud phase, vertical velocities, and radiative forcing

  6. Existing Collaborations • Canadian Network for the Detection of Atmospheric Change (CANDAC) • NOAA SEARCH program (Eureka, Tiksi) • Atmospheric Radiation Measurement (ARM) program – North Slope of Alaska site

  7. Potential Collaborations • Pan-Arctic Studies of the Coupled Tropospheric, Stratospheric and Mesospheric Circulation • Effect of synoptic storm activity on Arctic clouds • Research on Carbon, Water, and Energy Balance of the Arctic Landscape at Flagship Observatories and in a Pan-Arctic Network • Connection between surface energy balance and Arctic clouds

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