3fab138b-09b3-4636-9b22-90c15fc8213e eng Ev-K2-CNR +39 035 3230511 +39 035 3230551 Via San Bernardino 145 Bergamo BG 24126 Italy metadata@evk2cnr.org http://www.evk2cnr.org/ 2012-02-21T12:18:58 ISO 19115:2003/19139 1.0 An extended Kalman-filter for regional scale inverse emission estimation 2011-10-28T00:00:00 Atmos. Chem. Phys. Discuss.,Volume 11 10 27107-29559 Atmos. Chem. Phys. Discuss., 11, 29195–29249, 2011 1680-7375 A Kalman-filter based inverse emission estimation method for long-lived trace gases is presented for use in conjunction with a Lagrangian particle dispersion model like FLEXPART. The sequential nature of the approach allows tracing slow seasonal and interannual changes rather than estimating a single period-mean emission field. Other important features include the estimation of a slowly varying concentration background at each measurement station, the possibility to constrain the solution to non-negative emissions, the quantification of uncertainties, the consideration of temporal correlations in the residuals, and the applicability to potentially large inversion problems. The method is first demonstrated for a set of synthetic observations created from a prescribed emission field with different levels of (correlated) noise, which closely mimics true observations. It is then applied to real observations of the three halocarbons HFC-125, HFC-152a and HCFC-141b at the remote research stations Jungfraujoch and Mace Head for the quantification of emissions in Western European countries from 2006 to 2010. Estimated HFC-125 emissions are mostly consistent with national totals reported to the Kyoto protocol and show a generally increasing trend over the considered period. Results for HFC-152a are much more variable with estimated emissions being both higher and lower in different countries. The highest emissions of the order of 1000 Mg yr-1 are estimated for Italy which so far does not report HFC-152a emissions. Emissions of HCFC-141b show a continuing strong decrease as expected due to its ban under the Montreal Protocol. Emissions from France, however, were still rather large (near 1000 Mg yr-1) in the years 2006 and 2007 but strongly declined thereafter. Dominik Brunner Empa, Swiss Federal Laboratories for Materials Science and Technology, +41 587654493 Ueberlandstr. 129 Dübendorf ZH CH-8600 Switzerland Dominik.Brunner@empa.ch http://www.empa.ch Stephan Henne Empa, Swiss Federal Laboratories for Materials Science and Technology, +41 587654628 Ueberlandstr. 129 Dübendorf ZH CH-8600 Switzerland Stephan.Henne@empa.ch http://www.empa.ch Christoph A. Keller Empa, Swiss Federal Laboratories for Materials Science and Technology, +41 587654259 Ueberlandstr. 129 Dübendorf ZH CH-8600 Switzerland Christoph.Keller@empa.ch http://www.empa.ch Stefan Reimann Empa, Swiss Federal Laboratories for Materials Science and Technology, +41 587654638 Ueberlandstr. 129 Dübendorf ZH CH-8600 Switzerland Stefan.Reimann@empa.ch http://www.empa.ch Martin K. Vollmer Empa, Swiss Federal Laboratories for Materials Science and Technology, +41 587654242 Ueberlandstr. 129 Dübendorf, ZH CH-8600 Switzerland Martin.Vollmer@empa.ch http://www.empa.ch Simon O'Doherty School of Chemistry, University of Bristol, +44 1179289186 +44 1179252990 Bristol BS8 1TS United Kingdom S.ODoherty@bristol.ac.uk http://www.chm.bris.ac.uk Michela Maione The University of Urbino "Carlo Bo" - Chemical Science Institute +39 0722303316 +39 0722303310 Piazza Rinascimento 6 Urbino PU 61029 Italy michela.maione@uniurb.it www.uniurb.it Copernicus GmbH (Copernicus Publications) +49 5519003390 +49 55190033970 Bahnhofsallee 1e Göttingen 37081 Germany info@copernicus.org http://www.copernicus.org/ https://geoportal.mountaingenius.org/geonetwork/srv/eng/resources.get?uuid=3fab138b-09b3-4636-9b22-90c15fc8213e&fname=mountain_witness__s.png thumbnail png SHARE inverse emission estimation method trace gases eng climatologyMeteorologyAtmosphere -11.5 43.2 35.3 81.4 http://www.atmos-chem-phys-discuss.net/11/29195/2011/acpd-11-29195-2011.html WWW:LINK-1.0-http--link Abstract:"An extended Kalman-filter for regional scale inverse emission estimation." https://geoportal.mountaingenius.org/webapp/srv/en/resources.get?id=37560&fname=acpd-11-29195-2011.pdf&access=private WWW:DOWNLOAD-1.0-http--download acpd-11-29195-2011.pdf Full Text(pdf):"An extended Kalman-filter for regional scale inverse emission estimation." “An extended Kalman-filter for regional scale inverse emission estimation” Atmos. Chem. Phys. Discuss., 11, 29195-29249, 2011 D. Brunner, S. Henne, C. A. Keller, S. Reimann, M. K. Vollmer, S. O'Doherty, and M. Maione www.atmos-chem-phys-discuss.net/11/29195/2011/ doi:10.5194/acpd-11-29195-2011