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Anders Lindroth

Professor emeritus

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Comparison between tower and aircraft-based eddy covariance fluxes in five European regions

Författare

  • B Gioli
  • F Miglietta
  • B De Martino
  • RWA Hutjes
  • HAJ Dolman
  • Anders Lindroth
  • M Schumacher
  • MJ Sanz
  • G Manca
  • A Peressotti
  • EJ Dumas
Visa allt

Summary, in English

Airborne eddy covariance measurements provide a unique opportunity to directly measure surface energy, mass and momentum fluxes at the regional scale. This offers the possibility to complement the data that are obtained by the ground-based eddy covariance networks and to validate estimates of the surface fluxes that can be obtained by means of satellite products and models. The overall accuracy and the reliability of airborne eddy covariance measurements have already been assessed in the past for different platforms. More recently an international collaboration between several research laboratories and a European aeronautical manufacturer led to the development of a new small environmental research aircraft, called the Sky Arrow ERA (Environmental Research Aircraft). This aircraft has been used in the framework of the European Research Project RECAB (Regional Assessment and Modelling of the Carbon Balance in Europe), that is part of the CarboEurope projects cluster, to measure surface mass and energy exchange at five different European locations. An extensive comparison between airborne and ground-based flux data at seven flux measurement sites, showed the overall matching between airborne and tower data. While friction velocity and latent heat flux estimates made by airborne and tower data were comparable at all sites and under whatever conditions, substantial and consistent underestimation of CO2 (28% on average) and sensible heat fluxes (35% on average) was observed. Differences in the aircraft and tower footprint and flux divergence with height explained most of the discrepancies. (C) 2004 Elsevier B.V. All rights reserved.

Avdelning/ar

  • Institutionen för naturgeografi och ekosystemvetenskap

Publiceringsår

2004

Språk

Engelska

Sidor

1-16

Publikation/Tidskrift/Serie

Agricultural and Forest Meteorology

Volym

127

Issue

1-2

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Physical Geography

Nyckelord

  • regional ecosystem
  • aircraft flux measurements
  • area-averaged fluxes
  • exchange
  • flux divergence

Aktiv

Published

ISBN/ISSN/Övrigt

  • ISSN: 1873-2240