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Title: Droplet Number Concentration Value Added Product

Cloud droplet number concentration is an important factor in understanding aerosol-cloud interactions. As aerosol concentration increases, it is expected that droplet number concentration (Nd) will increase and droplet size will decrease, for a given liquid water path. This will greatly affect cloud albedo as smaller droplets reflect more shortwave radiation; however, the magnitude and variability of these processes under different environmental conditions is still uncertain.McComiskey et al. (2009) have implemented a method, based onBoers and Mitchell (1994), for calculating Nd from ground-based remote sensing measurements of optical depth and liquid water path. They show that the magnitude of the aerosol-cloud interactions (ACI) varies with a range of factors, including the relative value of the cloud liquid water path (LWP), the aerosol size distribution, and the cloud updraft velocity. Estimates of Nd under a range of cloud types and conditions and at a variety of sites are needed to further quantify the impacts of aerosol cloud interactions. In order to provide data sets for studying aerosol-cloud interactions, the McComiskey et al. (2009) method was implemented as the Droplet Number Concentration (NDROP) value-added product (VAP).
Publication Date:
OSTI Identifier:
Report Number(s):
NDROP; 003628WKSTN00
DOE Contract Number:
Software Revision:
Software Package Number:
Software Package Contents:
Open Source Software package available from Pacific Northwest National Laboratory at the following URL:
Software CPU:
Open Source:
Source Code Available:
Other Software Info:
ARM Program
Research Org:
Pacific Northwest National Laboratory
Sponsoring Org:
United States Department of Energy
Country of Publication:
United States

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