Title: Analysis of the sensitivity of atmospheric measurements at the JRC Ispra Atmosphere - Biosphere - Climate Integrated monitoring Station
Authors: BERGAMASCHI PeterBRUNNER Dominik
Publisher: Publications Office of the European Union
Publication Year: 2015
JRC N°: JRC94909
ISBN: 978-92-79-46164-4
ISSN: 1831-9424
Other Identifiers: EUR 27131
OP LB-NA-27131-EN-N
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC94909
DOI: 10.2788/234440
Type: EUR - Scientific and Technical Research Reports
Abstract: The sensitivity of atmospheric measurements at the JRC Ispra Atmosphere - Biosphere - Climate Integrated monitoring Station to emissions on different spatial scales is analysed using the Lagrangian particle dispersion model FLEXPART, driven by meteorological fields from the nested COSMO-2 / COSMO-7 numerical weather prediction system at a horizontal resolution of 2 km / 7 km, respectively. The sensitivity of the atmospheric signal shows significant variations on diurnal, synoptic and seasonal scales. During night, the sensitivity is usually dominated by the area 40-60 km around the station, while daytime footprints are much larger, typically dominated by the area at distances of more than 60 km. During summer daytime, the radius s50 (at which the cumulative surface sensitivity reaches 50% of the total sensitivity) is about 187 km on average. Furthermore, a clear diurnal cycle in local wind direction is visible due to a regional mountain - lake/valley wind system, leading to a significant diurnal cycle of the sensitivity (north-west vs. south-east), especially during summer time. Our analysis shows that the future sampling at the Ispra tall tower 100m above ground significantly reduces the impact of local emissions (~3-10 km around the station) compared to the previously used sampling height of 15m above ground.
JRC Directorate:Sustainable Resources

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