Abstract
Nitrogen Dioxide (NO2) is an important component of
air pollution. It is observed on a global scale by satellite
instruments such as GOME, SCIAMACHY and
OMI. Worldwide there are only few observation sites
where nitrogen dioxide tropospheric columns are
monitored on an operational basis. For satellite validation
it is essential to perform these ground based
measurements with good global and seasonal coverage
preferably in a network of similar and intercalibrated
instruments. Since November 2007 multiaxis
differential optical absorption spectroscopy (MAXDOAS)
observations of NO2 are performed on an operational
basis at the Royal Netherlands Meteorological
Institute (KNMI). For this a Mini MAX-DOAS instrument
is used. This relatively low cost instrument
could be a candidate for a global network as mentioned
above. We will explain the tropospheric column
retrieval algorithm which includes a correction for
aerosols. The Doubling Adding radiative transfer
model is used to create look up tables for the Air Mass
Factors as a function of radiation intensity which depends
on aerosol optical thickness (AOT) and boundary
layer height. In addition we will show results from
several studies based on the observations. First: a
comparison of retrieved AOT and direct sun observations
of AOT from the CESAR site in Cabauw, The
Netherlands. Second: an analysis of the retrieved tropospheric
vertical columns of NO2 in this highly polluted
region. Third: comparison with SCIAMACHY and
OMI tropospheric NO2 columns. Finally: first results
from the CINDI inter-comparison campaign for NO2
measuring instruments. This campaign has taken
place in Cabauw, in June and July 2009. Many different
groups have participate in this campaign which
had resulted in a variety of simultaneous in-situ and
remote sensing observations of NO2, other trace
gases and aerosols.
Original language | English |
---|---|
Title of host publication | Proceedings of the 8th International Symposium on Tropospheric Profiling, 19-23 October, 2009, Delft, The Netherlands |
Editors | A. Apituley, H.W.J. Russchenberg, W.A.A. Monna |
Place of Publication | Delft, The Netherlands |
Publication status | Published - 2009 |
Event | conference; 8th International Symposium on Tropospheric Profiling; 2009-10-19; 2009-10-23 - Duration: 19 Oct 2009 → 23 Oct 2009 |
Conference
Conference | conference; 8th International Symposium on Tropospheric Profiling; 2009-10-19; 2009-10-23 |
---|---|
Period | 19/10/09 → 23/10/09 |
Other | 8th International Symposium on Tropospheric Profiling |