wacr: W-Band (95 GHz) ARM Cloud Radar

The W-band Atmospheric Radiation Measurement (ARM) user facility Cloud Radar (WACR) systems are zenith-pointing Doppler radars that probe the extent and composition of clouds at 95.04 GHz.

The main purpose of this radar is to determine cloud boundaries (e.g., cloud bottoms and tops).

This radar reports estimates for the first three spectra moments for each range gate up to 15 km. The 0th moment is reflectivity, the 1st moment is radial velocity, and the 2nd moment is spectral width. Also available are the raw spectra files.

Unlike the millimeter wavelength cloud radar (MMCR), the WACR does not use pulse coding and operates in only copolarization and cross-polarization modes.



  • Fixed
  • AMF1
  • AMF2
  • AMF3

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Zheng Y, D Rosenfeld, and Z Li. 2018. "The Relationships Between Cloud Top Radiative Cooling Rates, Surface Latent Heat Fluxes, and Cloud-Base Heights in Marine Stratocumulus." Journal of Geophysical Research: Atmospheres, , 10.1029/2018JD028579.

Borque P, E Luke, P Kollias, and F Yang. 2018. "Relationship Between Turbulence and Drizzle in Continental and Marine Low Stratiform Clouds." Journal of the Atmospheric Sciences, 75(12), 10.1175/JAS-D-18-0060.1.
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Chakraborty S, K Schiro, R Fu, and J Neelin. 2018. "On the role of aerosols, humidity, and vertical wind shear in the transition of shallow-to-deep convection at the Green Ocean Amazon 2014/5 site." Atmospheric Chemistry and Physics, 18(15), 10.5194/acp-18-11135-2018.

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Zheng Y, D Rosenfeld, and Z Li. 2018. "Estimating the decoupling degree of subtropical marine stratocumulus decks from satellite." Geophysical Research Letters, , 10.1029/2018GL078382. ONLINE.

PZ, M Alvarado, C Chiu, S DeSzoeke, C Fairall, G Feingold, A Freedman, S Ghan, J Haywood, P Kollias, E Lewis, G McFarquhar, A McComiskey, D Mechem, T Onasch, J Redemann, D Romps, D Turner, H Wang, R Wood, S Yuter, and P Zhu. 2018. Layered Atlantic Smoke Interactions with Clouds (LASIC) Field Campaign Report. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-18-018.

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