1. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico 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 Participants Bernie Zak (Sandia NL) Johannes Verlinde (Penn State/NSA Chief Scientist)

2. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico 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. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico MWR MWRP NSA04 INSTRUMENTS GSR

4. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico Hot Calibration Target Cold Calibration Target GSR Radiometer Scanhead Trolley for GSR Scanhead Fans Radiometer Control Boxes Power Control Box

5. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico GSR IN OPERATION (1/3)

6. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico GSR IN OPERATION (2/3)

7. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico GSR IN OPERATION (3/3)

8. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico Dual-sonde launch: Vaisala RS90 and Chilled mirror (2004031101 UTC)

9. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico TIME SERIES OF CALIBRATION AND SKY OBSERVATIONS OF THE GSR Hot BB Cold BB Air mass 3.5 Air mass 3.0 Air mass 2.5 Air mass 2.0Air mass 1.5 Air mass 1.0 52 GHz Tb Motion trigger

10. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico TIME SERIES OF GSR 50-60 GHz RADIOMETER CHANNELS 50.3 51.7 52.6 53.3 53.8 54.4 54.9 55.5 56.0 56.2 56.3 2 MIN

11. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico TIME SERIES OF GSR 183 GHz RADIOMETER CHANNELS 183±15 183±12 183±7 183±5 183±3 183±1 183±0.5

12. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico TIME SERIES OF GSR 380 GHz RADIOMETER CHANNELS 380±17 380±9 380±4

13. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico NSA04 Kick-off - MWRP - MWR DPLX SONDES GW SONDES TIME SERIES OF MWR, MWRP and PROCESSED RADIOSONDES

14. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico ICI IMAGE OF BROKEN CLOUDS

15. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico

16. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico

17. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico 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-PHASED CLOUDS WERE OBSERVED. Boundary Level Cloud With Liquid Layer at Top and ice precipitation Mid-Level Ice Cloud Well Developed Boundary Layer Cloud with Liquid, Ice and Precipitation DOE/ARM Cloud Radar Aerosol Layers DOE/ARM Microwave Radiometer Cirrus DOE/ARM micropulse LIDAR Aerosol Layers Near Surface Liquid (Lead Plume?)

18. 2004 ARM Science Team Meeting, March 22-26, Albuquerque, New Mexico THE 2004 NORTH SLOPE OF ALASKA ARCTIC WINTER RADIOMETRIC EXPERIMENT: STATUS AS OF MARCH 19, 2004 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