Events Calendar

BG/ATM Seminar | Elisabeth Andrews

19 October at 13h00
Ahlmannsalen, Geohuset

Using long-term atmospheric aerosol
optical measurements to study climate

Elisabeth (Betsy) ANDREWS
NOAA and University of Colorado, Boulder, USA

NOAA’s Global Monitoring Division has made long-term, surface in-situ measurements of aerosol optical properties since the mid-1970s. Our goal is to characterize the means, variability, and trends of climate-forcing properties of different types of aerosols, and to understand the factors that control these properties. Measurements were initially only made at very remote ‘background’ sites but have since grown to include measurements at more regionally representative sites. The regional sites are important because human activities primarily influence aerosols on regional/continental scales rather than global scales. Today, NOAA’s Federated Aerosol Network comprises approximately 30 long-term sites making spectral measurements of aerosol light absorption and scattering. The long term data sets resulting from the NOAA Federated Aerosol Network can be used to identify temporal and spatial patterns in the atmospheric aerosol as well as for validation of satellite products and model simulations. This talk will provide an overview of NOAAs Federated Aerosol Network–measurements, sites and network evolution, and will touch briefly on several examples of how the long-term aerosol data have been used in the past. The remainder of the talk will focus on our current research using measurements of aerosol optical properties to evaluate global climate models.

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