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THE 2004 NORTH SLOPE OF ALASKA ARCTIC WINTER RADIOMETRIC EXPERIMENT

THE 2004 NORTH SLOPE OF ALASKA ARCTIC WINTER RADIOMETRIC EXPERIMENT. Ed R. Westwater (CIRES-CU/NOAA-ETL) Marian Klein (CIRES-CU/NOAA-ETL) Albin Gasiewski (NOAA-ETL) Vladimir Leuski (CIRES-CU/NOAA-ETL) Joseph Shaw (Montana State University) Jim Liljegren (ANL) Barry Lesht (ANL)

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THE 2004 NORTH SLOPE OF ALASKA ARCTIC WINTER RADIOMETRIC EXPERIMENT

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  1. THE 2004 NORTH SLOPE OF ALASKA ARCTIC WINTER RADIOMETRIC EXPERIMENT Ed R. Westwater (CIRES-CU/NOAA-ETL)Marian Klein (CIRES-CU/NOAA-ETL) Albin Gasiewski (NOAA-ETL)Vladimir Leuski (CIRES-CU/NOAA-ETL)Joseph Shaw (Montana State University)Jim Liljegren (ANL)Barry Lesht (ANL) Vinia Mattioli (University of Perugia) Domenico Cimini (CETEMPS-University of Aquila) Sally Dowlatshahi (Science and Technology Corp.) ARM ParticipantsBernie Zak (Sandia NL) Johannes Verlinde (Penn State/NSA Chief Scientist)

  2. Table 1. Instruments deployed during the Millimeter Wave Radiometric Arctic Winter Experiment’2004 (March 9 to April 9, 2004) Platform Parameters Derived Frequencies (GHz) ARM MWR PWV, ICL 23.8, 31.4 GHz Ground-based Scanning Radiometer (GSR)PWV 183.31 ± ( 0.5, ± 1, ± 3, ± 5, ± 7, ± 12, ± 15 GH) Ground-based Scanning Radiometer (GSR)T, ICL 50.3, 51.76, 52.625,53.29,53.845,54.4, 54.95, 55.52,56.025,56.215,56.325 GHz Microwave Profiler T, PWV, ICL 22.235, 23.035 ,23.835, 26.235, 30.000, 51.250, 52.280, 53.850, 54.940, 56.660, 57.290, 58.800 GHz Ground-based Scanning Radiometer (GSR)ICL 90 GHz (dual-polarization) Ground-based Scanning Radiometer (GSR) PWV, ICL 340 GHz (dual-polarization) Ground-based Scanning Radiometer (GSR) PWV, ICL 380.2 ±4, ±9, ± 17 GHz Infrared Cloud Imager (ICI) Spatial cloud coverage 8-14 microns Ground-based Scanning Radiometer (GSR) Cloud presence 10 microns GPS PWV 4-times a day Vaisala RS90 Radiosondes T and ρ profilec On demand: Chilled Mirror “Snow white” Radiosondes

  3. GSR MWRP MWR NSA04 INSTRUMENTS

  4. Fans Cold Calibration Target Hot Calibration Target Power Control Box Radiometer Control Boxes GSR Radiometer Scanhead Trolley for GSR Scanhead

  5. GSR IN OPERATION (1/3)

  6. GSR IN OPERATION (2/3)

  7. GSR IN OPERATION (3/3)

  8. Dual-sonde launch: Vaisala RS90 and Chilled mirror (2004031101 UTC)

  9. Hot BB Cold BB Air mass 3.5 Air mass 3.0 Air mass 2.5 Air mass 2.0 Air mass 1.5 Air mass 1.0 TIME SERIES OF CALIBRATION AND SKY OBSERVATIONS OF THE GSR 52 GHz Tb Motion trigger

  10. 56.3 56.2 56.0 55.5 54.9 54.4 53.8 53.3 52.6 51.7 50.3 TIME SERIES OF GSR 50-60 GHz RADIOMETER CHANNELS 2 MIN

  11. 183±0.5 183±1 183±3 183±5 183±7 183±12 183±15 TIME SERIES OF GSR 183 GHz RADIOMETER CHANNELS

  12. 380±4 380±9 380±17 TIME SERIES OF GSR 380 GHz RADIOMETER CHANNELS

  13. - MWRP - MWR • DPLX SONDES • GW SONDES NSA04 Kick-off TIME SERIES OF MWR, MWRP and PROCESSED RADIOSONDES

  14. ICI IMAGE OF BROKEN CLOUDS

  15. COMPOSITE IMAGE OF CLOUD RADAR, MICROPULSE LIDAR AND MWR OBSERVATIONS FOR THE FIRST SIX DAYS OF THE IOP. CLEAR SKY, LOW CLOUD, MID-LEVEL CLOUDS, MIXED-PHASEDCLOUDS WERE OBSERVED. Boundary Level Cloud With Liquid Layer at Top and ice precipitation Well Developed Boundary Layer Cloud with Liquid, Ice and Precipitation Mid-Level Ice Cloud DOE/ARM Cloud Radar DOE/ARM micropulse LIDAR Near Surface Liquid (Lead Plume?) Aerosol Layers Cirrus Aerosol Layers Aerosol Layers DOE/ARM Microwave Radiometer

  16. GSR HAS BEEN OPERATING CONTINUOUSLY SINCE MARCH 9, 2004: DATA ARE OF HIGH QUALITY RADIOSONDES: 4-TIMES A DAY RS-90 AT ARM DUPLEX 1-TIME A DAY RS-90 AT CART SITE 2 SYNOPTIC NWS SONDES ARE BEING LAUNCHED DAILY 5 OF 10 CHILLED MIRROR HAVE BEEN LAUNCHED MWR AND MW-PROFILER ARE OPERATING: BOTH PWV AND TEMPERATURE RETRIEVALS ARE ENCOURAGING THE INFRARED CLOUD IMAGER IS PRODUCING HIGH RESOLUTION IMAGES OF THE SKY EVERY 2 MINUTES THE 2004 NORTH SLOPE OF ALASKA ARCTIC WINTER RADIOMETRIC EXPERIMENT: STATUS AS OF MARCH 19, 2004

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