NASA Research Announcements INFORMATION
SCIENCE DATA ANALYSIS
Aerosol properties: Studies to characterize the optical, microphysical, and chemical properties of aerosols, and development of techniques to identify aerosol sources using CALIPSO data alone or in combination with other A-train datasets.
Cloud Properties: Studies to characterize the optical, microphysical, and radiative properties of clouds. Polar clouds and clouds in the tropical tropopause layer are of particular interest.
Cloud-aerosol interactions: Most cloud droplets are formed on aerosol particles, and changes in aerosol concentration or composition can affect cloud formation, cloud microphysical and radiative properties, and precipitation processes. Conversely, aerosols can undergo chemical and physical transformation inside cloud droplets. Understanding how these cloud-aerosol interaction processes are influenced by anthropogenic aerosol is one of the key issues in the climate change problem. CALIPSO together with the rest of the A-train provides new data with which to address this problem.
Air quality and pollutant transport: Anthropogenic aerosol can impact regional air quality. Further, polluted airmasses can be transported on global scales, and the large-scale transport of urban aerosol can be tracked by satellite lidar. Vertically resolved aerosol measurements from CALIPSO combined with remote sensing trace gas measurements from Aura may provide new capabilities to characterize air quality and observe the dispersion of regional emissions on a global scale.
Direct and indirect aerosol radiative forcing: Studies using CALIPSO observations, alone or together with other A-train observations, to produce improved observational assessments of aerosol radiative forcing and the uncertainties, as well as improvements in model-based assessments.
Surface and atmospheric fluxes: CALIPSO and Cloudsat will provide comprehensive observations of aerosol and cloud height, thickness and layering. These observations along with other measurements available from the A-train provide an opportunity to explore the influences of aerosols and clouds on radiative fluxes at the surface and within the atmosphere.
Cloud-radiation-dynamical feedback processes: Cloud properties are determined in part by feedback processes involving atmospheric state, atmospheric dynamics, and radiative interactions with the environment. Cloud profiles from CALIPSO and CloudSat along with near simultaneous observations of clouds, radiative fluxes, and atmospheric state from other A-train instruments provide the potential for more complete characterization of these processes than has heretofore been possible.
Properties of mixed-phase clouds: Polarization profiles from the CALIPSO lidar provide range-resolved identification of cloud ice/water phase, including the identification and characterization of optically thin mixed phase clouds. CALIPSO observations together with observations from CloudSat and other A-train instruments allow new approaches to the characterization of the properties of mixed phase clouds. (and the parameterization of mixed-phase processes in models)
Polar stratospheric clouds: Studies to characterize the distribution, properties, and lifecycles of polar stratospheric clouds.
MODELING AND DATA ASSIMILATION
A number of types of studies involving models and CALIPSO data are of interest:
- Use of CALIPSO data to test and improve the representation of clouds and aerosols in models.
- Use of modeling to interpret CALIPSO observations.
- Development of techniques for model assimilation of CALIPSO cloud and aerosol data.
Studies involving the use of global climate models, regional models, chemical transport models, NWP models, air quality models, cloud resolving models, and LES models may be of interest.