1 / 18

Progress and hold-ups in CarboEurope intercomparison activities

Progress and hold-ups in CarboEurope intercomparison activities. News on sausages, grapefruits, cucumbers. Armin Jordan Max-Planck-Institute for Biogeochemistry 07701 Jena, Germany. Main goals assure comparability of atmospheric data so that these can be merged more confidently

hazina
Download Presentation

Progress and hold-ups in CarboEurope intercomparison activities

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Progress and hold-ups in CarboEurope intercomparison activities News on sausages, grapefruits, cucumbers Armin Jordan Max-Planck-Institute for Biogeochemistry 07701 Jena, Germany

  2. Main goals • assure comparability of atmospheric data so that these can • be merged more confidently • identify, quantify, and reduce, calibration scale offsets • detect concentration dependent deviations • indicator for malfunctioning of analytical systems • flask data and continuous data

  3. LSCE LSCE CMAR MSC UHEI MSC UHEI NIES MPI 2 bar 1.5 bar MPI NOAA/CU MPI NOAA/CU CIO CIO 0 bar dried compressed air CMAR NIES MPI Sausage Flask Intercomparison (1)

  4. Sausage Flask Intercomparison (2)

  5. Sausage Flask Intercomparison (3)

  6. BUT….. • Not yet useful as tool for detection of problems in near time • because of • delayed data sumission / wrong data format • delayed / incomplete web updates • inadequate quality check of submitted data by participants • for many species offsets are documented but not reduced • modification of web presentation pending for over 1 year

  7. Grapefruit Flask Intercomparison (1) • double frequency of intercomparison • all labs compare identical sample from the same flask • → check of sausages

  8. Grapefruit Flask Intercomparison (2)

  9. Cucumbers (1)

  10. Cucumbers (2)

  11. Cucumbers (3) • News since Crete 2006 meeting: • New cylinders have been purchased with DIN 14 valves instead of CGA590 • Cylinders have been filled and spiked in Jena • Storage test indicate stability of mixtures • Boxes have foam housing for regulators • All pressure regulators equipped with • New DIN 14 connectors • Plugs on both ends • inlet filters • outlet quick connect couplings

  12. Pressure regulators still weak part of the system: • DIN14 connection has not made the system more robust: • PCTFE sealing gaskets broke (four types tested) • (loss of ¼ cylinder filling) • regulators to be handled with great care • first stage membrane broken with 3 regulators

  13. Field site test Air intake Open Tedlar bag Flow control Field instrumentation Standard gas

  14. Field site test Flasksampler test in the lab OXK tower 23 m line test with flask sampler OXK tower 23 m line GC test

  15. O2/N2 comparability: harmonizing the scale (MPI)

  16. O2/N2 comparability: harmonizing the scale (UBern)

  17. O2/N2 comparability: harmonizing the scale (CIO)

  18. O2/N2 field sample flask intercomparison

More Related