1. MAGIC Cloud Radars Karen Johnson kjohnson@bnl.gov First MAGIC Science Workshop 5/2014

2. Ship Layout Location of ARM Instrumentation

3. MWACR Marine W-band ARM Cloud Radar 95 GHz, 3.2 mm Stabilized platform KAZR Ka-band ARM Zenith Radar 35 GHz, 8.6 mm NOT stabilized About the radars  vertically-pointing  stored Radar Moments: Reflectivity Mean Doppler velocity Spectrum width  stored Spectra  had high data rates Both Radars… Beam-steerable wind profiler

4. What do cloud radars provide?... Cloud Properties! Moments + Signal-to-noise ratio  Cloud layer bases, tops Cloud fraction Reflectivity of clouds Hydrometeor vertical motions Ka- and W-band spectra, together  Drop size distribution Vertical air velocity Effective Radius

5. 02 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 KAZR HI MWACR Radar Data Timeline 2012.09.222013.05.112012.10.20 Good Sensitivityover all ranges Best Sensitivity; hts > 2km Better Sensitivity; Hts > 0.7km more Better Sensitivitybutattenuation Ship Leg 2012.12.152012.11.172013.07.072013.08.032013.08.312013.09.28 Radar 2013.06.08

6. Reflectivity, Date vs. Height KAZR GE Reflectivity KAZR HI Reflectivity MWACR Reflectivity HlLA Date Leg 07 Range (km) 18 0 18 0 16 0

7. Lowest few kilometers KAZR GE Reflectivity Lowest 4 km MWACR Reflectivity Lowest 4 km LAHlLA Date Leg 15 4040 4 0 Range (km)

8. KAZR General vs. Higher Sensitivity Modes KAZR GE Reflectivity Lowest 4 km KAZR MD Reflectivity Lowest 4 km LAHlLA Date Leg 15 4 0 4 0 Range (km) 4 0 4 0

9. Availability of Radar Data All data ingested (netCDF) and available at the ARM Archive. magkazrgeM1.a1 magkazrmdM1.a1 or magkazrhiM1.a1 magmwacrM1.a1 Spectra data also has been ingested; most is at the Archive now. Leg-by-leg Images are here: http://www.gim.bnl.gov/armclouds/MAGIC/MAGIC_image_table.htm

10. Status of Radar Data Corrections to be done: Calibration of Reflectivity : Just received KAZR ‘internal’ calibration values Will omit spurious lowest range gates esp. KAZR MD: don’t use data below ~700m Will be reprocessing to apply them very soon Ship Motion Compensation (SHIPCOR VAP) VAPs to be run: (after corrections done) KAZR-ARSCL, WACR-ARSCL MicroARSCL (spectra) ?? Questions? See something odd? kjohnson@bnl.gov