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| Titel |
The Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI): design, execution, and early results |
| VerfasserIn |
A. J. M. Piters, K. F. Boersma, M. Kroon, J. C. Hains, M. Roozendael, F. Wittrock, N. Abuhassan, C. Adams, M. Akrami, M. A. F. Allaart, A. Apituley, S. Beirle, J. B. Bergwerff, A. J. C. Berkhout, D. Brunner, A. Cede, J. Chong, K. Clémer, C. Fayt, U. Frieß, L. F. L. Gast, M. Gil-Ojeda, F. Goutail, R. Graves, A. Griesfeller, K. Grossmann, G. Hemerijckx, F. Hendrick, B. Henzing, J. Herman, C. Hermans, M. Hoexum, G. R. Hoff, H. Irie, P. V. Johnston, Y. Kanaya, Y. J. Kim, H. Klein Baltink, K. Kreher, G. Leeuw, R. Leigh, A. Merlaud, M. M. Moerman, P. S. Monks, G. H. Mount, M. Navarro-Comas, H. Oetjen, A. Pazmino, M. Perez-Camacho, E. Peters, A. Piesanie, G. Pinardi, O. Puentedura, A. Richter, H. K. Roscoe, A. Schönhardt, B. Schwarzenbach, R. Shaiganfar, W. Sluis, E. Spinei, A. P. Stolk, K. Strong, D. P. J. Swart, H. Takashima, T. Vlemmix, M. Vrekoussis, T. Wagner, C. Whyte, K. M. Wilson, M. Yela, S. Yilmaz, P. Zieger, Y. Zhou |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 2 ; Nr. 5, no. 2 (2012-02-27), S.457-485 |
| Datensatznummer |
250002470
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| Publikation (Nr.) |
 copernicus.org/amt-5-457-2012.pdf |
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| Zusammenfassung |
| From June to July 2009 more than thirty different in-situ and remote sensing
instruments from all over the world participated in the Cabauw
Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI).
The campaign took place at KNMI's Cabauw Experimental Site for Atmospheric
Research (CESAR) in the Netherlands. Its main objectives were to determine the
accuracy of state-of-the-art ground-based measurement techniques for the
detection of atmospheric nitrogen dioxide (both in-situ and remote sensing),
and to investigate their usability in satellite data validation. The expected
outcomes are recommendations regarding the operation and calibration of such
instruments, retrieval settings, and observation strategies for the use in
ground-based networks for air quality monitoring and satellite data
validation. Twenty-four optical spectrometers participated in the campaign,
of which twenty-one had the capability to scan different elevation angles
consecutively, the so-called Multi-axis DOAS systems, thereby collecting
vertical profile information, in particular for nitrogen dioxide and aerosol.
Various in-situ samplers and lidar instruments simultaneously characterized the variability of
atmospheric trace gases and the physical properties of aerosol particles. A
large data set of continuous measurements of these atmospheric constituents
has been collected under various meteorological conditions and air pollution
levels. Together with the permanent measurement capability at the CESAR site
characterizing the meteorological state of the atmosphere, the CINDI campaign
provided a comprehensive observational data set of atmospheric constituents
in a highly polluted region of the world during summertime. First detailed
comparisons performed with the CINDI data show that slant column measurements
of NO2, O4 and HCHO with MAX-DOAS agree within 5 to 15%,
vertical profiles of NO2 derived from several independent instruments
agree within 25% of one another, and MAX-DOAS aerosol optical thickness agrees within
20–30% with AERONET data. For the in-situ NO2 instrument using a
molybdenum converter, a bias was found as large as 5 ppbv during day time,
when compared to the other in-situ instruments using photolytic converters. |
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