Report of Methane Reference Gas Intercomparison for the Asia from 2014 to 2016

Transcription

1 Report of Methane Reference Gas Intercomparison for the Asia from 2014 to Introduction The Japan Meteorological Agency (JMA) serves as the World Calibration Centre (WCC) for Methane and the Quality Assurance/Science Activity Centre (QA/SAC) in Asia and the South-West Pacific within the framework of the Global Atmosphere Watch (GAW) Programme of the World Meteorological Organization (WMO). JMA carried out the first intercomparison in 2001 for the Asian region. The methane reference gas intercomparisons thereafter that JMA has carried out are listed in Table 1. Table 1 List of Methane Reference Gas Intercomparisons by JMA Number of Round Region Period of Intercomparison 1 st South-West Pacific Apr Dec Asia Apr Nov Japan Sep Mar nd South-West Pacific Dec Aug Asia Jul Aug Japan Jun Jan rd South-West Pacific Apr Feb.2011 Asia May Jul Japan Oct Feb th South-West Pacific Jun Apr Asia Jun Mar Japan Dec Aug th Asia Jul Nov In the 5th round intercomparison for the Asia, the methane reference gases (cylinder number: CPB13002, CPB13003) prepared in Japan in 2014 were circulated between July 2014 and November 2016 in the order of JMA, Korea Meteorological Administration (KMA), the Indian Institute of Tropical Meteorology (IITM) and JMA again. 2. Results of the Intercomparison Regarding the 5th round intercomparison for the Asia, the measurement results of the methane reference gases are summarized in Table 2. All of the participants (KMA, IITM and JMA) adopt the WMO X2004A Scale for this intercomparison. The results of the KMA and JMA agreed within 0.5 ppb for each cylinder. IITM representative has informed that due to instrument failure at the time of monitoring of cylinders, the reported values are not true values. These values are for reference. 1/8

2 Details of the measurements performed at each laboratory and its contact information are given in the Appendix. Table 2 Results of Methane Reference Gas Intercomparison for the Asia from 2014 to 2016 Laboratory and Location JMA Tokyo, Japan KMA Anmyeon-do, Republic of Korea IITM Pune, India JMA Tokyo, Japan Date of Measurement Mole fraction (ppb) CPB13002 SD (ppb) Cylinder Number No Mole fraction (ppb) CPB13003 SD (ppb) Jul. 2, Mar. 16, Jul. 14, 2015 to Jan. 1, ** ** Nov. 7, No Instrument SHIMADZU GC-14BPF Picarro G2301 Thermo Fisher Scientific Trace GC Ultra SHIMADZU GC-14BPF SD: Standard deviation; No: Number of measurements; **: Reference value; References WMO/JMA, Methane Reference Gas Intercomparison, ch4/comparison.html Compiled by GAW World Calibration Centre (WCC) for Methane and Quality Assurance/Science Activity Centre (QA/SAC) in Asia and the South-West Pacific c/o Japan Meteorological Agency 1-3-4, Otemachi, Chiyoda-ku, Tokyo , Japan Phone: Fax: /8

3 Appendix Methane Reference Gas Intercomparison for the Asia from 2014 to 2016 Technical Details of the Cylinders and their Attachments 1. Cylinders (a) Quantity: (b) Contents: (c) Volume and pressure: (d) Cylinder No. and approximate CH 4 mole fractions: (e) Manufacturer: 2 cylinders (10-liter type) Natural air + methane 9.4 liters, 11.8MPa at 35 o C CPB13002, 1739 ppb CPB13003, 1899 ppb JAPAN FINE PRODUCTS CORPORATION 2. Regulators (a) Quantity: (b) Type: (c) Output port: 2 regulators with gaskets Aerotrace ATR-203RF 1/8 Finelok 3. Container (a) Quantity: (b) Size: (c) Weight: 1 aluminum container 850(W) 460(D) 410(H) mm 40kg (packed with cylinders etc.) Regulator Cylinder Aluminum Container 3/8

4 Contact and Contributors of Participating Laboratories, and Technical Details on Laboratory Measurements Korea Meteorological Administration (KMA) Contact point Ms. Haeyoung Lee Korea Meteorological Administration 61, Yeouidaebang-ro 16 gil, Dongjak-gu, Seoul, 07062, Republic of Korea Tel: Fax: Information on Methane Measurement System (as of March ) 1. Information on contributors (1) Contributors: Ms. Haeyoung Lee (2) Organization: Korea Meteorological Administration 2. Information on instrument (1) Analytical method: Cavity Ring Down Spectroscopy (2) Manufacturer: Picarro (3) Model: G Information on sampling (1) Flow rate: 500 ml/min 4. Information on measuring (1) One measurement: 40 min/ measurement (2) Mole fractions: Same above 5. Information on standard gas (1) Number of standard gases: 4 (2) Mole fraction of standard gases: , , , ppb (3) Diluent gas: Dry ambient air (Tertiary standard from NOAA) (4) Scale: WMO X2004A Scale 6. Other information (references, papers, literatures, etc.) 4/8

5 Indian Institute of Tropical Meteorology (IITM) Contact point Dr. Yogesh K. Tiwari Centre for Climate Change Research, Indian Institute of Tropical Meteorology, (Ministry of Earth Sciences, Govt. of India) Homi Bhabha Road, NCL Post, Pune , Maharashtra, INDIA Tel: Fax: Information on Methane Measurement System (as of January ) 1. Information on contributors (1) Contributors: Dr. Yogesh K. Tiwari (2) Organization: Indian Institute of Tropical Meteorology 2. Information on instrument (1) Analytical method: Gas Chromatography (FID) (2) Manufacturer: Thermo Fisher Scientific (3) Model: Trace GC Ultra 3. Information on sampling (1) Sampling volume: 5 ml (2) Carrier gas: Nitrogen (3) Flow rate: 30 ml/min (4) Temperature of the oven: 70 degree centigrade 4. Information on the main column (1) Diameter: 1/8 inch (2) Length: 4 meter (3) Material: Stainless steel 5. Information on column packings (1) Trade name: Packed column HayeSep (2) Mesh: 4m, 1/8 HayeSep Q 80/100 mesh 6. Information on standard gas (1) Number of standard gases: 3 (2) Mole fraction of standard gases: , , ppb (3) Diluent gas: Purified air (4) Scale: WMO X2004A Scale 7. Other information (references, papers, literatures, etc.) Yogesh K. Tiwari, Ramesh K. Vellore, K. Ravi Kumar, Marcel van der Schoot, Chun-Ho Cho, 2014, Influence of monsoons on atmospheric CO2 spatial variability and ground-based monitoring over India, Science of The Total Environment, Volume 490, 15 August 2014, Pages , ISSN: [IF = 3.976] K. Ravi Kumar, Yogesh K. Tiwari*, Vinu Valsala, Raghu Murtugudde, 2014, On understanding of land-ocean CO2 contrast over Bay of Bengal: A case study during 2009 summer monsoon, Environmental Science and Pollution Research, Volume 21, 5/8

6 Issue 7, April 2014, Page , ISSN: , DOI: /s Yogesh K. Tiwari, K. Ravi Kumar, Glass Flask Air Sample Analysis through Gas Chromatography in India: Implications for Constraining CO2 Surface Fluxes, 15th WMO/IAEA Meeting of Experts on Carbon Dioxide, Other Greenhouse Gases and Related Tracers Measurement Techniques, WMO / GAW Report No. 194, WMO/TD-No. 1553, April 2011 Yogesh K. Tiwari, K. Ravi Kumar, 2012, GHGs observation programs in India, Asian GAW greenhouse gases news letter, Vol.3, ISSN , page 5-11, Korea Meteorological Administration, Seoul, South Korea, December /8

7 Japan Meteorological Agency (JMA) Contact point Mr. Seiji Miyauchi Quality Assurance/Science Activity Centre (QA/SAC) Atmospheric Environment Division Global Environment and Marine Department Japan Meteorological Agency (JMA) 1-3-4, Otemachi, Chiyoda-ku Tokyo , Japan Tel: Fax: Mr. Teruo Kawasaki Chief of the calibration section, WCC for CH 4 Atmospheric Environment Division Global Environment and Marine Department Japan Meteorological Agency (JMA) 1-3-4, Otemachi, Chiyoda-ku Tokyo , Japan Tel: Fax: tr_kawasaki@met.kishou.go.jp Information on Methane Measurement System (as of November 7, 2016) 1. Information on contributors (1) Contributors: Teruo Kawasaki and Takanori Matsumoto (2) Organization: Japan Meteorological Agency, Japan 2. Information on instrument (1) Analytical method: Gas Chromatography (FID) (2) Manufacturer: SHIMADZU (3) Model: Series GC-14BPF 3. Information on sampling (1) Sampling volume: 10 ml (2) Carrier gas: Nitrogen (ultra high purity) (3) Flow rate: 50 ml/min (4) Temperature of the oven: 70 o C 4. Information on the main column (1) Diameter: 3 mm (2) Length: 4 m (3) Material: Stainless steel 5. Information on column packings (1) Trade name: Molecular Sieve 5A (2) Mesh: 60/80 6. Information on standard gas (1) Number of standard gases: 5 (2) Mole fraction of standard gases: , , , , ppb (3) Diluent gas: Purified air 7/8

8 (4) Scale: WMO X2004A Scale 7. Other information (references, papers, literatures, etc.) Aoki, S., T. Nakazawa, S. Murayama and S. Kawaguchi, Measurements of atmospheric methane at the Japanese Antarctic station, Syowa, Tellus, Ser. B, 44, , 1992 Matsueda, H., Intercalibration experiment of methane standard gas scale between NOAA/CMDL and MRI/GRL, Papers in Meteorology and Geophysics, 44, No.2, 45-56, Matsueda, H., Y. Sawa, A. Wada, H.Y. Inoue, K. Suda, Y. Hirano, K. Tsuboi and S. Nishioka, Methane standard gases for atmospheric measurements at the MRI and JMA and intercomparison experiments, Papers in Meteorology and Geophysics, 54, , Tsuboi, K., H. Matsueda, Y. Sawa, Y. Niwa, M. Takahashi, S. Takatsuji, T. Kawasaki, T. Shimosaka, T. Watanabe, and K. Kato (2016), Scale and stability of methane standard gas in JMA and comparison with MRI standard gas, Papers in Meteorology and Geophysics, 66, 15-24, doi: /mripapers /8