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Turbulent fluxes above different land use areas by airborne measurements

Turbulent fluxes above different land use areas by airborne measurements. Silvia Alfieri (CNR – ISAFOM, Italy) Huilin Chen (MAX PLANK INS., Germany) Dan Dobrovolschi (ANM, Romenia) Monica Górska (Wageningen University, The Netherlands) Petra Kroon (ECN-TUDelft, The Netherlands)

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Turbulent fluxes above different land use areas by airborne measurements

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  1. Turbulent fluxes above different land use areas by airborne measurements Silvia Alfieri (CNR – ISAFOM, Italy) Huilin Chen (MAX PLANK INS., Germany) Dan Dobrovolschi (ANM, Romenia) Monica Górska (Wageningen University, The Netherlands) Petra Kroon (ECN-TUDelft, The Netherlands) Daniel Martinez (UIB, Mallorca).

  2. Research questions • Is there a difference in boundary layer height above forest and agriculture land? • Is there a difference in meteorological variables above forest and agriculture land? • Is there a difference in turbulent fluxes above forest and agriculture land? • Is there a difference in entrainment above forest and agriculture land?

  3. Background • Climate model uncertainties about • boundary layer heights • turbulent fluxes • entrainment

  4. Flight strategy Clear sky Planned flight pattern

  5. Flight strategy Some clouds Real flight pattern

  6. Results: Boundary layer height • Boundary layer height is higher above agriculture. Same stated by Fisch et al. (2004) considering a dry area

  7. Results: Boundary layer height • Boundary layer height is higher above agriculture. Same stated by Fisch et al. (2004) considering a dry area

  8. Results: Meteorological variables Potential temperature Water vapour F A F A • Potential temperature seems to be lower above agriculture • Water vapour seems to be higher above agriculture

  9. Results: Fluxes Sensible heat Latent heat • Sensible heat flux seems to be lower above agriculture • Latent heat flux seems to be higher above agriculture

  10. Conclusions • Is there a difference in boundary layer height above forest and agriculture land? • Is there a difference in meteorological variables above forest and agriculture land? Yes, higher above agriculture Probably yes, lower potential temperature and higher water vapour mixing ratio above agriculture

  11. Conclusions • Is there a difference in turbulent fluxes above forest and agriculture land? • Is there a difference in entrainment above forest and agriculture land? Yes, slightly lower sensible heat fluxes and higher latent heat fluxes above agriculture. (However more investigations are needed!) To be investigated

  12. Future plans • More thoroughly investigation of • Boundary layer heights • Concentrations • Turbulent fluxes • Entrainment • Trying to write an article

  13. Thank you for listening!

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