Robert Koelemeijer

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The Global Ozone Monitoring Experiment (GOME) on board the ERS-2 isdesigned to measure trace gas column densities in the Earth's atmosphere. Such retrievals are hindered by the presence of clouds. The most important cloud parameters that are needed to correct trace gas column density retrievals for the disturbing effects of clouds are the (effective) cloud(More)
[1] We present a retrieval of tropospheric nitrogen dioxide (NO2) columns from the Global Ozone Monitoring Experiment (GOME) satellite instrument that improves in several ways over previous retrievals, especially in the accounting of Rayleigh and cloud scattering. Slant columns, which are directly fitted without low-pass filtering or spectral smoothing, are(More)
One of the nine instruments on-board the polar-orbiting environmental satellite ENVISAT is the Global Ozone Monitoring by Occultation of Stars (GOMOS) instrument. This paper presents validation results of GOMOS ozone profiles (v6.0a) from comparisons to microwave radiometer, balloon ozonesonde and lidar measurements worldwide. Thirty-one instruments/(More)
Introduction • On average, more than 60% of the Earth’s surface is covered by clouds. Clouds strongly affect atmospheric radiative fluxes and heating rates. Therefore it is crucial that climate models produce realistic cloud fields with the correct cloud properties and feedbacks. This is a challenging task. The underlying difficulty is that many different(More)
MNP has evaluated the cost-effectiveness of policy options to improve the air quality in the Netherlands. This paper considers further abatement options in different sectors and looks at the emissions of primary and secondary precursors for fine particulate matter (PM10). The evaluation shows that there are two ways to consider the cost-effectiveness of(More)
The dual view of the Advanced Along Track Scanning Radiometer (AATSR) allows for the accurate retrieval of aerosol properties over land using an algorithm in which these two views are used to eliminate the influence of the land reflectance on the top of the atmosphere radiation. The algorithm uses the AATSR IR and visible wavebands for cloud detection and(More)
To acquire daily estimates of PM2.5 distributions based on satellite data one depends critically on a well established relation between AOD and ground level PM2.5. In this study we aimed to experimentally establish the AOD-PM2.5 relationship for the Netherlands. For that purpose an experiment was set-up at the AERONET site Cabauw. The average PM2.5(More)
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