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Torbern Tagesson

Forskare

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

Författare

  • 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
Visa allt

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.

Avdelning/ar

  • Institutionen för naturgeografi och ekosystemvetenskap
  • BECC: Biodiversity and Ecosystem services in a Changing Climate

Publiceringsår

2018

Språk

Engelska

Sidor

124-136

Publikation/Tidskrift/Serie

International Journal of Applied Earth Observation and Geoinformation

Volym

65

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Physical Geography

Nyckelord

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

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1569-8432