At the ENVISAT symposium 2007 in Montreux a poster is presented with goals and status of ADAGUC
ADAGUC at EGU General Assembly 2007 in Vienna
Goals and current status of ADAGUC will be presented in an oral presentation
ADAGUC at National Geo Information Days in Rotterdam
ADAGUC presented 2 posters to the Dutch Geoinformation community in the former van Nelle factory in Rotterdam.
ADAGUC success in Geo-Connected
ADAGUC will receive an additional grant for a top-up project, dealing with climate and forecast data. The Geo-Connected tender has been issued by RGI to establish bridges between research programs.
Presentations workshop 2006 online
The presentations of the ADAGUC workshop are now online. You can access them
SCIA NO2 Nitrogen Dioxide
NO2 data from SCIAMACHY
1.1. Product description
tropospheric NO2 columns are retrieved from satellite
observations. They are based on slant column NO2 retrievals
with the DOAS technique, and the KNMI combined
modelling/retrieval/assimilation approach. The slant columns from
SCIAMACHY observations are derived by BIRA-IASB.
dataset has been developed to monitor air pollution from
anthropogenic and natural sources.
the ADAGUC use cases.
1.2. Time period of content
1.2.1. Time period of content
2002 till today.
1.2.2. Currentness reference
Actual time of observation.
1.3.2. Maintenance and update
1.4. Spatial Domain
1.4.1. Bounding coordinates
coverage: Longitude [-180,180], latitude [-90.,90.].
Figure 1. The mean
tropospheric NO2 column for the year 2004 as derived from cloud-free
and nearly cloud-free (cloud radiance <50%) SCIAMACHY
observations. For the grey areas no observations are shown due to a
persistent snow-covered ground surface or cloud cover.
Error Analysis for Tropospheric NO2
Retrieval from Space, K.F. Boersma, H.J. Eskes and E.J. Brinksma, J.
Geophys. Res. 109 D04311,
2. Data Quality
2.1.1. Source information
slant columns from BIRA-IASB.
2.1.2. Processing steps
22.214.171.124. Processing description
Satellite instruments use spectroscopy to retrieve atmospheric trace
gas concentrations in the atmosphere. By comparing the measured
spectrum of the backscattered light from the Earth’s atmosphere
with a reference spectrum, the column density of nitrogen dioxide
along the light path can be determined. The NO2
stratospheric column is deduced from a chemistry-transport model
assimilation run of the NO2 column data. Subsequently, the
assimilated stratospheric column is subtracted from the retrieved
total column, resulting in a tropospheric column.
126.96.36.199. Algorithms used
NO2 retrieval algorithm.
188.8.131.52. Ancillary data
data (wind, temperature, surface pressure) by ECMWF.