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Torbern Tagesson

Torbern Tagesson

Researcher

Torbern Tagesson

Retrieval of daily gross primary production over Europe and Africa from an ensemble of SEVIRI/MSG products

Author

  • B. Martínez
  • S. Sanchez-Ruiz
  • M. A. Gilabert
  • A. Moreno
  • M. Campos-Taberner
  • F. J. García-Haro
  • I. F. Trigo
  • M. Aurela
  • C. Brümmer
  • A. Carrara
  • A. De Ligne
  • D. Gianelle
  • T. Grünwald
  • J. M. Limousin
  • A. Lohila
  • I. Mammarella
  • M. Sottocornola
  • R. Steinbrecher
  • T. Tagesson
Show all

Summary, in English

The main goal of this paper is to derive a method for a daily gross primary production (GPP) product over Europe and Africa taking the full advantage of the SEVIRI/MSG satellite products from the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT) sensors delivered from the Satellite Application Facility for Land Surface Analysis (LSA SAF) system. Special attention is paid to model the daily GPP response from an optimized Montheith's light use efficiency model under dry conditions by controlling water shortage limitations from the actual evapotranspiration and the potential evapotranspiration (PET). The PET was parameterized using the mean daily air temperature at 2 m (Ta) from ERA-Interim data. The GPP product (MSG GPP) was produced for 2012 and assessed by direct site-level comparison with GPP from eddy covariance data (EC GPP). MSG GPP presents relative bias errors lower than 40% for the most forest vegetation types with a high agreement (r > 0.7) when compared with EC GPP. For drylands, MSG GPP reproduces the seasonal variations related to water limitation in a good agreement with site level GPP estimates (RMSE = 2.11 g m−2 day−1; MBE = −0.63 g m−2 day−1), especially for the dry season. A consistency analysis against other GPP satellite products (MOD17A2 and FLUXCOM) reveals a high consistency among products (RMSD < 1.5 g m−2 day−1) over Europe, North and South Africa. The major GPP disagreement arises over moist biomes in central Africa (RMSD > 3.0 g m−2 day−1) and over dry biomes with MSG GPP estimates lower than FLUXCOM (MBD up to −3.0 g m−2 day−1). This newly derived product has the potential for analysing spatial patterns and temporal dynamics of GPP at the MSG spatial resolutions on a daily basis allowing to better capture the GPP dynamics and magnitude.

Department/s

  • Dept of Physical Geography and Ecosystem Science
  • BECC: Biodiversity and Ecosystem services in a Changing Climate

Publishing year

2018

Language

English

Pages

124-136

Publication/Series

International Journal of Applied Earth Observation and Geoinformation

Volume

65

Document type

Journal article

Publisher

Elsevier

Topic

  • Physical Geography

Keywords

  • Daily
  • GPP
  • Light-use efficiency
  • LSA SAF
  • MSG
  • Water stress

Status

Published

ISBN/ISSN/Other

  • ISSN: 1569-8432