1Finnish Meteorological Institute, P.O. Box 503, 00101, Helsinki, Finland
2NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
Received: 04 Nov 2009 – Discussion started: 21 Dec 2009
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".
Revised: 23 Jul 2010 – Accepted: 18 Nov 2010 – Published: 24 Nov 2010
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.