QA/SAC - JAPAN 日本語版 English World Meteorological Organization (WMO) Global Atmosphere Watch (GAW) Quality Assurance/Science Activity Centre (QA/SAC) for Asia and the South-West Pacific The Quality Assurance/Science Activity Centre (QA/SAC) for Asia and the South-West Pacific was established in the Japan Meteorological Agency (JMA) in October 1995 as one of the QA/SACs within the framework of WMO's Global Atmosphere Watch (GAW) programme. The objective of QA/SACs is to oversee the quality of the data in the GAW observation network. This QA/SAC emphasizes activities in the areas of carbon dioxide (CO2), ethane (CH4) and total ozone. This QA/SAC benefits from being collocated with the World Calibration Centre (WCC) and the World Data Centre for Greenhouse Gases (WDCGG). The main tasks of this QA/SAC are as follows: To cooperate technically with GAW stations in starting and maintaining observations; To evaluate the quality of observational data submitted to the WDCGG, including the consistency and comparability of calibration scales for measurements, in cooperation with the WCC, WDCGG and contributors; and To provide supporting documents to promote scientific use of GAW data. Technical cooperation with GAW stations in Asia and the South-West Pacific [seminar, exchange of experts] Information for scientific use of GAW data for CO2 and CH4 [availability of the data, calibration scale, deviation from the zonal average] CO2[table xlsx,119KB] [explanation] CH4[table xlsx,68KB] [explanation] Technical Report of Global Analysis Method for Major Greenhouse Gases by the WDCGG [pdf, 2.2MB] The advisory group of experts for the QA/SAC for Asia and the South-West Pacific GAW Reports(WMO E-Library) Links to related institutes and information Quality Assurance/Science Activity Centre (QA/SAC) for Asia and South-West Pacific Atmospheric Environment and Ocean Division Atmosphere and Ocean Department Japan Meteorological Agency (JMA) E-mail: Last Updated: 2025.6.5 QA/SAC-Japan