TY  - JOUR
A1  - Hall, Brad D.
A1  - Engel, Andreas
A1  - Mühle, Jens
A1  - Elkins, James William
A1  - Artuso, Florinda
A1  - Atlas, Elliot L.
A1  - Aydin, Murat
A1  - Blake, Donald R.
A1  - Brunke, Ernst-Günther
A1  - Chiavarini, Salvatore
A1  - Fraser, Paul J.
A1  - Happell, James D.
A1  - Krummel, Paul B.
A1  - Levin, Ingeborg
A1  - Loewenstein, Max
A1  - Maione, Michela
A1  - Montzka, Stephen A.
A1  - O'Doherty, Simon
A1  - Reimann, Stefan
A1  - Rhoderick, George J.
A1  - Saltzman, Eric S.
A1  - Scheel, Hans-Eckhart
A1  - Steele, L. Paul
A1  - Vollmer, Martin K.
A1  - Weiss, Ray F.
A1  - Worthy, Douglas E.
A1  - Yokouchi, Yoko
T1  - Results from the International Halocarbons in Air Comparison Experiment : (IHALACE) [Discussion paper]
T2  - Atmospheric measurement techniques discussions
N2  - The International Halocarbons in Air Comparison Experiment (IHALACE) was conducted to document relationships between calibration scales among various laboratories that measure atmospheric greenhouse and ozone depleting gases. Six stainless steel cylinders containing natural and modified natural air samples were circulated among 19 laboratories. Results from this experiment reveal relatively good agreement among commonly used calibration scales for a number of trace gases present in the unpolluted atmosphere at pmol mol−1 (parts per trillion) levels, such as chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and hydrofluorocarbons (HFCs). Some scale relationships were found to be consistent with those derived from bi-lateral experiments or from analysis of atmospheric data, while others revealed discrepancies. The transfer of calibration scales among laboratories was found to be problematic in many cases, meaning that measurements tied to a common scale may not, in fact, be compatible. These results reveal substantial improvements in calibration over previous comparisons. However there is room for improvement in communication and coordination of calibration activities with respect to the measurement of halogenated and related trace gases.
Y1  - 2013
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/31651
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-316516
SN  - 1867-8610
N1  - © Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License.
VL  - 6
SP  - 8021
EP  - 8069
PB  - Copernicus
CY  - Katlenburg-Lindau
ER  -