1 / 21

Johan Mellqvist, (jome@rss.chalmers.se Elisabeth Undén and Anders Strandberg

Solar FTIR measurements at Harestua, Norway since 1994. Johan Mellqvist, (jome@rss.chalmers.se Elisabeth Undén and Anders Strandberg Radio and Space Science Chalmers University of Technology Göteborg Sweden. ORS group, Radio and Space, Chalmers University of Technology.

biana
Télécharger la présentation

Johan Mellqvist, (jome@rss.chalmers.se Elisabeth Undén and Anders Strandberg

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. Solar FTIR measurements at Harestua, Norway since 1994 Johan Mellqvist, (jome@rss.chalmers.se Elisabeth Undén and Anders Strandberg Radio and Space ScienceChalmers University of Technology Göteborg Sweden

  2. ORS group, Radio and Space, Chalmers University of Technology • High resolution FTIR Harestua • Long path FTIR+tracer gas • Methane emissions from waste deposits • Emission factors from trafic (Mexico Milano) • Mobile solar FTIR • CO/H2CO-Megacities (Mexico City, Milano) • Industrial emissions VOCs (alkenes, alkanes) • Volcanic emissions (HCl, HF, SO2) • UV/visible • Ship emissions (SO2, NO2) • Volcanic emissions (15 volcanoes-NOVAQ) • Industrila emissions (NO2, SO2)

  3. Harestua, Norway (68 N, 11E) Complimentary NDSC site since 1994

  4. Measurements since 1994 within NDSC • 1 meas/week • Yearly report to NDSC database • Quality assurance and control • Stratospheric studies (Clx, Fx, N, O3) • Seasonal (polar ozone depletion, chlorine activation, model comparison) • Long term studies (model, trend) • Financed by Swedish EPA EU-Geomon (previously Sesame,Theseo) • Troposheric studies (CO, C2H6, O3, CH4, N2O) • Model comapriosn, trend • Finananced by EU-HYMN (prev EU-UFTIR) • Satellite validation • Schimachy, MIPAS, ACE-FTS, Haloe) • Financed through EU-HYMN. (previous Swedish spaceboard and EU-COSE)

  5. FTIR (Bruker) 0.0025 cm-1 resolution New Solar tracker

  6. Halogenes

  7. O3 and HCl O3 HCl

  8. CO column data all UFTIR stations CO

  9. CTM2 Model and FTIR comparison

  10. C2H6 FTIR and Model comparison Model underestimates C2H6 observed columns by about 40-50% in winter/spring ; by about 25-35% in fall; esp. at high latitudes as Harestua Changing the C2H6 emissions in the model seems to correct this problem, similar all stations, original emissions to low

  11. Tropospheric O3 and model comparison

  12. Tropospheric HCFC22 HCFC22 increasing fast

  13. Tropospheric N2O

  14. The Solar Occultation Flux method (SOF) (alkenes & alkanes) Sun tracker FTIR

  15. SOF Box Solar Occultation Flux (SOF) measurements around the Houston Ship Channel and other source areas,

  16. Ethylene mass measured downwind of HSC by mobile solar FTIR (SOF) on Aug 30 2006

  17. FTIR measurements of methane emissions from Swedish landfills • Improvement of the Swedish landfill • methane budget • Development of a measurement tool for • regulatory control of landfill emissions (CH4) • Model validation • Verification of improvement measures taken • at the different landfill sites

  18. The amount of CH4 oxidation by methanotrophic bacteria in the cover soil is determined by observing the isotopic ratio of 13CH4/12CH4 in the landfill gas both in the anaerobic zone and in the plume. Analysis of landfill plume CH4 by FTIR spectroscopy QX = Emission rate of methane respectively tracergas, (kgh-1) CX = Concentration of CH4 resp. tracer gas, expressed as mixing ratio (ppb) MX = Molecular weight

  19. Measurement distance 1-3 km from landfill Source of tracer gas (N2O) Wind direction

  20. Car emission factor Ratios of various species towards CO2 in morning rush hour plume in Milano (FORMAT) Measurements by Long path FTIR (Same meas. have been done in Mexico city)

  21. Emission factors for fresh emissions (morning) at Bresso (for HC based on speciation by JRC which gave that FTIR overestimated alkane mass by 14%. Ratios for alkenes, BTEX and total HC based on assumption that JRC speciation valid for fresh emissions and constant over the time period)

More Related