6 Cirrus Ice water content (IWC) Bulk microphysical property of clouds, but highly variable within an individual cloud Critical parameter in determining radiative forcing of a cloud (via IWP) Key prognostic variable in GCMs from which to determine radiative properties Data are still sparse!
7 Relationship between IWP and TOA Forcing Garrett et al., GRL, 2003 R e = 5-10 m
8 Locations of IWC measurements M. Kraemer, submitted
10 Sampling locations ARM CART and Madison HSRL overflights Underflight of A-train satellites, including CloudSat, CALIPSO, MODIS and AIRS (to further ongoing intercomparison work) Colorado, wave cloud situations Direct measurements of convective outflow
11 Specific areas of interest Cubic ice – Make contrail, then sample as contrail evolves Pileus and wave clouds – lay contrail (high saturation) or exhaust plume (low saturation) and follow plume through uplift region.