1 / 14

Wenche Aas and Karl Espen Yttri (EMEP/CCC)

Summary of what has been done and some first preliminary results related to the last EMEP intensive field measurements. Wenche Aas and Karl Espen Yttri (EMEP/CCC). Outline. The experience and lesson learnt from the 2007-2008 intensive period Background and content of the two latter periods

Télécharger la présentation

Wenche Aas and Karl Espen Yttri (EMEP/CCC)

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. Summary of what has been done and some first preliminary results related to the last EMEP intensive field measurements Wenche Aas and Karl Espen Yttri (EMEP/CCC)

  2. Outline • The experience and lesson learnt from the 2007-2008 intensive period • Background and content of the two latter periods • What has been measured by whom • How (methodology and time resolution) • First prelimenary results • How to proceed

  3. Experiences from the last EMEP Intensive periods in 2007 -2008 • Lot of different data –no clear priority • Problems with some non comparable data sets • OC, TC or OM are sometimes corrected and sometimes not. Not always known which temperature programme is used. Different filters. • Not known artefact for NO3, NH4 from filters (ex IT01) • Sometimes PM1 > PM2.5 > PM1.0 ( mass or speciation) • Non harmonised reporting • Different format and units, not always specified the PM size, neither method • Parallel reporting to EMEP/EUSAAR etc causing duplications and confusing • Unclear on Intellectual property rights • Nevertheless, a unique dataset for EMEP • Especially for hourly resolution – need a publication on this (MSC-W/CEH/PSI..) • What to do further with the speciation data is not decided

  4. Improvement for last periods • Clear guidelines of which measurements are needed/wanted • Harmonised measurement methods, especially needed for EC/OC –use reference • Data reporting in harmonised format • Improved information on Data ownership and IPR • (Better spatial distribution of the more advanced measurements )

  5. 1) What to measure • Mass closure (inorganic, crustal, EC/OC). Daily/weekly (EMEP) or hourly (EUCAARI) • Inorganic gas concentrations (HNO3, NH3) • Aerosol size distributions (EUCAARI/EUSAAR) • Separation of organic aerosol into • primary vs. secondary and • biogenic vs. anthropogenic components (e.g. levoglucosane, 14C); • Attempts to quantify aerosol water (EUCAARI) • Attempts to quantify the OC/OM ratio (EUCAARI) • Vertical profiles (coordinate with Earlinet)

  6. High resolution measurements EUCAARI: 11 AMS + 4 MARGA/GRAEGOR/SJAC To be presented by Eiko on wednesday

  7. Weekly speciation measurements

  8. 2) Harmonised measurement method • Filter from same batch (sendt from NILU) • Tandem filter approach (QBQ) • EC/OC with EUSAAR -2 • Levoglucosan at NILU • in addition FMI,Ispra, FR.. do levo analysis • Intercalibration beeing conducted • 14C at Bern (some at Lund) • Mineral dust –some guidelines given

  9. 3) Data reporting • Weekly speciation • 2008 data by normal EMEP data reporting before 31 July2009 (new deadline) • 2009 data with simplified excel format • Except from DE44, only EC/OC yet been reported • Hourly data (AMS) • Converting routines beetween AMS output to NASA AMES are beeing established (EUCAARI) • Eiko Nemitz received data (Wednesday)

  10. 4) Data ownership

  11. Results, EC/OC and Levoglucosan • OCp = particulate OC. Front – backup filter, conservative OC estimate • OC wood from levoglucosan analysis • Sites where we presently has data for both levoglucosan (analysed at NILU) and EC/OC • increasing concentrations along a Southern and Eastern transect.

  12. Further process • Weekly speciation • Filters sent to Bern for 14C analysis • Apportion analysis of the organic matter (latin hypercube) • EC from biomass and fossil fuel • OC from biomass, fossil fuel, biogenics • SOA from anthropogenic and bigenic precursors • QA: lab intercalibration for non central labs • Reporting and publication (EMEP special issue) • Hourly • Reporting format soon to be implemented • EUCAARI group to publish results

More Related