urn:x-wmo:md:ch.meteoswiss.gawsis::60101000010_mole_fraction_of_cfc12_in_air_c1w_ALT_NOAA-ESRL-GMD eng utf8 Federal Office of Meteorology and Climatology MeteoSwiss +41 (0)44 256 92 23 +41 (0)44 256 92 78 Krähbühlstrasse 58 Zürich ZH 8044 Switzerland gawsis@meteoswiss.ch http://gaw.empa.ch/gawsis/ pointOfContact 2013-08-07 WMO Core Metadata Profile of ISO 19115 (WMO Core), 2003/Cor.1:2006 (ISO 19115), 2007 (ISO/TS 19139) 1.3 WGS 84 World Geodetic System mole_fraction_of_cfc12_in_air values from station Alert (GAWID=ALT) (data generation: continuous, reporting interval: 1 Week(s)) 2013-05-20 revision Time series of CCl2F2 (dichlorodifluoromethane, CFC-12) measurements (type:Greenhouse Gas) at Global Atmosphere Watch station Alert (station type: Global). Measurements are Continuous. The measurement interval is 1 Week(s). The measurement method is ## Flask sampling (details: GC). In 1986, the Alert Background Air Pollution Monitoring Network (BAPMoN) Observatory was opened as Canada's first research station for the continuous monitoring of background concentrations of trace gases and aerosols. Currently, the Dr. Neil Trivett Global Atmosphere Watch Observatory at Alert, NU is the most northerly site in the GAW Network. It is located on the northeastern tip of Ellesmere Island in Nunavut, Canada at 82º28'N and 62º30'W, far removed from the major industrial regions of the Northern Hemisphere. Alert is also the site of a military station (CFS Alert) staffed with about 60 personnel, and an Environment Canada Upper Air Weather Station. The Alert GAW Observatory is approximately 400 m2 in size and is situated 210 m above sea level and 6 km SSW of CFS Alert. It is a key site for Arctic atmospheric process studies, which have led to the discovery of such phenomena as Arctic haze, important chemical interactions of pollutants with snow surfaces, and rapid changes in the chemical composition of the atmospheric boundary layer during polar sunrise. The program at Alert has grown substantially since its inception. A team of Canadian scientists, working in partnership with international scientists, maintains the extensive measurement program at Alert. The measurement and research of trace atmospheric constituents thought to have an impact on climate remains a primary function for this station. Elkins, James W., Dr. NOAA ESRL Global Monitoring Division +1 (303) 497-6224 +1 (303) 497-6290 325 Broadway R/GMD Boulder CO 80305-332 United States James.W.Elkins@noaa.gov pointOfContact atmospheric composition chemistry physics theme WMO keyword list, version 1.0 2008-09-23 publication atmosphericComposition theme WMO_CategoryCode 2012-09-15 publication Greenhouse Gas:CFCs:mole_fraction_of_cfc12_in_air theme textTable en iso-8859-1 climatologyMeteorologyAtmosphere The bounding extent covers the country where dataset was acquired. IV - North/Central America Canada Alert -141 -52.617 41.913 83.113 1977-01-01 2012-12-01 210 210 m above sea level WGS84 string physicalMeasurement ASCII (formatted) 2009 http://ds.data.jma.go.jp/gmd/wdcgg/cgi-bin/wdcgg/accessdata.cgi?index=ALT482N00-NOAA&select=parameter&param=200612120356 WWW:LINK-1.0-http--link mole_fraction_of_cfc12_in_air values from station Alert (GAWID=ALT) (data generation: continuous, reporting interval: 1 Week(s)) series The data is subject to quality control according to specific procedures of the data originator. No additional information can be given at this point. The data might further be quality controlled by the GAW WDC, see quality flags.