title: Direct assessment of international consistency of standards for ground-level ozone: strategy and implementation toward metrological traceability network in Asia.
abstract: An international exercise to directly assess consistency of standards for ground-level ozone in East Asia was conducted as part of the East Asian Regional Experiment 2005 (EAREX 2005) in the framework of the Atmospheric Brown Clouds (ABC) project. Ten organizations collaboratively participated in the intercomparison. Four groups representing Japan, Korea, Hong Kong, and Taiwan made comparisons at the Gosan super observatory, Jeju Island, Korea, in March 2005, with ozone instruments calibrated to their national standards, and four Japanese groups made off-site comparisons with laboratory-level standards. All comparisons generally indicated good agreement with the standard reference photometer (SRP) 35, built by the National Institute of Standards and Technology (USA) and maintained by the National Institute for Environmental Studies (Japan). The assessment was expanded to measurement networks contributing to the World Meteorological Organization's Global Atmospheric Watch (WMO/GAW) program as part of off-site comparisons, and excellent agreement was achieved. These efforts contribute to propagating traceability of the national metrology standards among the atmospheric science community, to ensuring comparability of the existing ozone measurements, and to establishing an integrated network of air quality monitoring in Asia.
authors.affiliation: Asian Environment Research Group, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan. tanimoto@nies.go.jp
authors.forename: H
authors.initials: H
authors.lastname: Tanimoto
authors.forename: H
authors.initials: H
authors.lastname: Mukai
authors.forename: Y
authors.initials: Y
authors.lastname: Sawa
authors.forename: H
authors.initials: H
authors.lastname: Matsueda
authors.forename: S
authors.initials: S
authors.lastname: Yonemura
authors.forename: T
authors.initials: T
authors.lastname: Wang
authors.forename: S
authors.initials: S
authors.lastname: Poon
authors.forename: A
authors.initials: A
authors.lastname: Wong
authors.forename: G
authors.initials: G
authors.lastname: Lee
authors.forename: J Y
authors.initials: JY
authors.lastname: Jung
authors.forename: K R
authors.initials: KR
authors.lastname: Kim
authors.forename: M H
authors.initials: MH
authors.lastname: Lee
authors.forename: N H
authors.initials: NH
authors.lastname: Lin
authors.forename: J L
authors.initials: JL
authors.lastname: Wang
authors.forename: C F
authors.initials: CF
authors.lastname: Ou-Yang
authors.forename: C F
authors.initials: CF
authors.lastname: Wu
authors.forename: H
authors.initials: H
authors.lastname: Akimoto
authors.forename: P
authors.initials: P
authors.lastname: Pochanart
authors.forename: K
authors.initials: K
authors.lastname: Tsuboi
authors.forename: H
authors.initials: H
authors.lastname: Doi
authors.forename: C
authors.initials: C
authors.lastname: Zellweger
authors.forename: J
authors.initials: J
authors.lastname: Klausen
mesh_terms: D001208:Asia; D007391:International Cooperation; D010126:Ozone / Q000032:analysis* / Q000592:standards; D011786:Quality Control; D012015:Reference Standards; D013056:Spectrophotometry, Ultraviolet
chemical_list: D010126:Ozone