Fine-scale Horizontal Structure of Arctic Mixed-Phase Clouds.

• Main Authors: Rambukkange,M.;Verlinde, J., Elorante, E., Luke, E., Kollias, P., Shupe, M.
• Language: unknown
• Published: 2009
• Subjects: 54 ENVIRONMENTAL SCIENCES; CLOUDS; RADAR; REFLECTIVITY; REMOTE SENSING; WATER; PHASE STUDIES; ICE; ARCTIC REGIONS; Arctic; Hallett; north slope; Alaska
• Online Access: http://www.osti.gov/servlets/purl/940810; https://www.osti.gov/biblio/940810

Recent in situ observations in stratiform clouds suggest that mixed phase regimes, here defined as limited cloud volumes containing both liquid and solid water, are constrained to narrow layers (order 100 m) separating all-liquid and fully glaciated volumes (Hallett and Viddaurre, 2005). The Department of Energy Atmospheric Radiation Measurement Program's (DOE-ARM, Ackerman and Stokes, 2003) North Slope of Alaska (NSA) ARM Climate Research Facility (ACRF) recently started collecting routine measurement of radar Doppler velocity power spectra from the Millimeter Cloud Radar (MMCR). Shupe et al. (2004) showed that Doppler spectra has potential to separate the contributions to the total reflectivity of the liquid and solid water in the radar volume, and thus to investigate further Hallett and Viddaurre's findings. The Mixed-Phase Arctic Cloud Experiment (MPACE) was conducted along the NSA to investigate the properties of Arctic mixed phase clouds (Verlinde et al., 2006). We present surface based remote sensing data from MPACE to discuss the fine-scale structure of the mixed-phase clouds observed during this experiment.