Aerosol-cloud interaction determined by both in situ and satellite data over a northern high-latitude site H. Lihavainen1, V.-M. Kerminen1, and L. A. Remer2 1Finnish Meteorological Institute, P.O. Box 503, 00101, Helsinki, Finland 2NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
Abstract. The first aerosol indirect effect over a clean, northern high-latitude site
was investigated by determining the aerosol cloud interaction (ACI) using
three different approaches; ground-based in situ measurements, combined
ground-based in situ measurements and satellite retrievals and using only satellite
retrievals. The obtained values of ACI were highest for in situ ground-based data,
clearly lower for combined ground-based and satellite data, and lowest for
data relying solely on satellite retrievals. One of the key findings of this
study was the high sensitivity of ACI to the definition of the aerosol
burden. We showed that at least a part of the variability in ACI can be
explained by how different investigators have related different cloud
properties to "aerosol burden".
Citation: Lihavainen, H., Kerminen, V.-M., and Remer, L. A.: Aerosol-cloud interaction determined by both in situ and satellite data over a northern high-latitude site, Atmos. Chem. Phys., 10, 10987-10995, doi:10.5194/acp-10-10987-2010, 2010.