50bb68a2-686e-4d58-85cb-3663631c408d eng 2f8f7474-e97d-4ba4-bb6a-424b05b23adb Ev-K2-CNR +39 035 3230511 +39 035 3230551 Via San Bernardino 145 Bergamo BG 24126 Italy metadata@evk2cnr.org http://www.evk2cnr.org/ 2012-04-02T09:06:59 ISO 19115:2003/19139 1.0 Three-year observations of halocarbons at the Nepal Climate Observatory at Pyramid (NCO-P, 5079 m a.s.l.) on the Himalayan range ACP - Special Issue 2011-04-12T00:00:00 Atmospheric Chemistry and Physics,11 Special Issue" Atmospheric brown cloud in the Himalayas." 3431-3441 Atmospheric Chemistry and Physics,11, 3431-3441, 2011 Special Issue" Atmospheric brown cloud in the Himalayas." 1680-7316 A monitoring programme for halogenated climate-altering gases has been established in the frame of the SHARE EV-K2 -CNR project at the Nepal Climate Laboratory – Pyramid in the Himalayan range at the altitude of 5079 m a.s.l. The site is very well located to provide important insights on changes in atmospheric composition in a region that is of great significance for emissions of both anthropogenic and biogenic halogenated compounds. Measurements are performed since March 2006, with grab samples collected on a weekly basis. The first three years of data have been analysed. After the identification of the atmospheric background values for fourteen halocarbons, the frequency of occurrence of pollution events have been compared with the same kind of analysis for data collected at other global background stations. The analysis showed the fully halogenated species, whose production and consumption are regulated under the Montreal Protocol, show a significant occurrence of “above the baseline” values, as a consequence of their current use in the developing countries surrounding the region, meanwhile the hydrogenated gases, more recently introduced into the market, show less frequent spikes. Atmospheric concentration trends have been calculated as well, and they showed a fast increase, ranging from 5.7 to 12.6%, of all the hydrogenated species, and a clear decrease of methyl chloroform(-17.7%).The comparison with time series from other stations has also allowed to derive Meridional gradients, which are absent for long living well mixed species, while for the more reactive species, the gradient in creases inversely with respect to their atmospheric lifetime. The effect of long range transport and of local events on the atmospheric composition at the station has been analysed as well, allowing the identification of relevant source regions the Northern half of the Indian sub-continent. Also, at finer spatial scales, a smaller, local contribution of forest fires from the Khumbu valley has been detected. Copernicus GmbH (Copernicus Publications) +49 5519003390 +49 55190033970 Bahnhofsallee 1e Göttingen 37081 Germany info@copernicus.org http://www.copernicus.org WWW:LINK-1.0-http--related 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 http://www.uniurb.it/ WWW:LINK-1.0-http--partners Umberto Giostra The University of Urbino "Carlo Bo" -Science campus Sogesta +39 0722304249 Via Ca Le Suore 2/4 Urbino PU 61029 Italy umberto.giostra@uniurb.it u.giostra@uniurb.it http://scitec.uniurb.it Paolo Bonasoni Institute of Atmospheric Sciences and Climate (ISAC) - CNR +39 0516399590 +39 0516399652 Via Gobetti,101 Bologna BO 40129 Italy p.bonasoni@isac.cnr.it http://www.isac.cnr.it/ WWW:LINK-1.0-http--partners Paolo Cristofanelli Institute of Atmospheric Sciences and Climate (ISAC) - CNR +39 0516399597 +39 0516399652 Via Gobetti,101 Bologna BO 40129 Italy p.cristofanelli@isac.cnr.it http://www.isac.cnr.it/ WWW:LINK-1.0-http--partners Paolo Laj CNRS Laboratory of Meteorology Physics - Laboratory of Glaciology +33 685628874 +33 473405132 Avenue des Landais Aubiere Cedex 63177 France aj@lgge.obs.ujf-grenoble.fr http://wwwobs.univ-bpclermont.fr WWW:LINK-1.0-http--partners Elisa Vuillermoz Ev-K2-CNR +39 0353230513 +39 0353230551 Via San Bernardino, 145 Bergamo BG 24126 Italy elisa.vuillermoz@evk2cnr.org http://www.evk2cnr.org/ Jgor Arduini The University of Urbino "Carlo Bo" - Chemical Science Institute +39 0722303316 +39 0722303311 Piazza Rinascimento, 6 Urbino PU 61029 Italy j.arduini@uniurb.it www.uniurb.it Francesco Furlani The University of Urbino "Carlo Bo"-Department of Basic Sciences and Fundamentals (DiSBeF) +39 0722304249 Piazza della Repubblica, 13 Urbino PU 61029 Italy francesco.furlani@uniurb.it www.uniurb.it https://geoportal.mountaingenius.org/geonetwork/srv/eng/resources.get?uuid=50bb68a2-686e-4d58-85cb-3663631c408d&fname=mountain_witness__s.png thumbnail png Atmospheric Brown Clouds Himalayas Nepal Climate Observatory-Pyramid Nepal halocarbons SHARE ABC eng climatologyMeteorologyAtmosphere environment geoscientificInformation 80.0522 88.1946 26.3684 30.4247 http://www.atmos-chem-phys.net/special_issue162.html WWW:LINK-1.0-http--link The book contains the scientific papers published by EvK2Cnr researchers in a special issue of Atmospheric Chemistry and Physics, entitled "Atmospheric brown clouds in the Himalayas " http://www.atmos-chem-phys.org/11/3431/2011/acp-11-3431-2011.html WWW:LINK-1.0-http--related Abstract:Three-year observations of halocarbons at the Nepal Climate Observatory at Pyramid (NCO-P, 5079 m a.s.l.) on the Himalayan range https://geoportal.mountaingenius.org/webapp/srv/en/resources.get?id=1650&fname=acp-11-3431-2011.pdf&access=private WWW:DOWNLOAD-1.0-http--download acp-11-3431-2011.pdf Full Text(pdf):"Three-year observations of halocarbons at the Nepal Climate Observatory at Pyramid (NCO-P, 5079 m a.s.l.) on the Himalayan range". The book contains the scientific papers by EvK2Cnr researchers in a special issue of Atmospheric Chemistry and Physics, entitled "Atmospheric brown clouds in the Himalayas " " Three-year observations of halocarbons at the Nepal Climate Observatory at Pyramid (NCO-P, 5079 m a.s.l.) on the Himalayan range" ACP (Atmospheric Chemistry and Physics) - Special Issue Atmospheric brown cloud in the Himalayas. M. Maione, U. Giostra, J. Arduini, F. Furlani, P. Bonasoni, P. Cristofanelli, P. Laj, and E. Vuillermoz Atmos. Chem. Phys., 11, 3431-3441, 2011 Editor(s): G. McFiggans and J. J. Schauer