A Multi-Instrument Cloud Condensation Nuclei Spectrum Product
Authors
Ezra Ezra Levin Levin — Colorado State University
Peter Marinescu — Colorado State University
Sonia Kreidenweis — Colorado State University
Manasi Mahish — Texas A&M University
Don R. Collins — University of California, Riverside
Category
Microphysics (cloud, aerosol and/or precipitation)
Description
Multiple years of aerosol data have been collected from routine observations at the ARM Southern Great Plains (SGP) site, along with specialized data from a number of intensive studies. More recently, the suite of routine measurements has included PM1 composition measured with an aerosol chemical speciation monitor (ACSM; Aerodyne, Inc.) and hygroscopicity and aerosol size distributions via a tandem differential mobility analyzer. These measurements complement the collocated measurements of cloud condensation nuclei concentration (CCNc; Droplet Measurement Technologies) and can be used to develop detailed CCN spectra that extrapolate to lower and higher supersaturations. Additional data (e.g., optical properties) are incorporated as checks on derived properties. We present results from a new effort to produce CCN spectra by merging these observations. In addition to providing guidance for modeling efforts, the merged spectra provide insights into seasonal and interannual variations in aerosol types and sources impacting the SGP site.
