29 Jun 2021

29 Jun 2021

Review status: this preprint is currently under review for the journal ESSD.

The TROPOSIF global sun-induced fluorescence dataset from the Sentinel-5P TROPOMI mission

Luis Guanter1, Cédric Bacour2, Andreas Schneider3,a, Ilse Aben3, Tim A. van Kempen3, Fabienne Maignan4, Christian Retscher5, Philipp Köhler6, Christian Frankenberg6, Joanna Joiner7, and Yongguang Zhang8 Luis Guanter et al.
  • 1Research Institute of Water and Environmental Engineering (IIAMA), Universitat Politècnica de València, Valencia, Spain
  • 2NOVELTIS, Labège, France
  • 3SRON Netherlands Institute for Space Research, Utrecht, The Netherlands
  • 4Laboratoire des Sciences du Climat et de l’Environnement (LSCE) / Institut Pierre Simon Laplace (IPSL), Gif-sur-Yvette, France
  • 5European Space Agency (ESA/ESRIN), Frascati, Italy
  • 6Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
  • 7National Aeronautics and Space Administration (NASA) Goddard Space Flight Center (GSFC), Greenbelt, MD, USA
  • 8International Institute for Earth System Science, Nanjing University, Nanjing, Jiangsu, China
  • anow at: Finnish Meteorological Institute, Sodankylä, Finland

Abstract. The first satellite-based global retrievals of terrestrial sun-induced chlorophyll fluorescence (SIF) were achieved in 2011. Since then, a number of global SIF datasets with different spectral, spatial and temporal sampling characteristics have become available to the scientific community. These datasets have been useful to monitor the dynamics and productivity of a range of vegetated areas worldwide, but the coarse spatio-temporal sampling and low signal-to-noise ratio of the data hamper their application over small or fragmented ecosystems. The recent advent of the Copernicus Sentinel-5P TROPOMI mission and the high quality of its data products promise to alleviate this situation, as TROPOMI provides daily global measurements at a much denser spatial and temporal sampling than earlier satellite instruments. In this work, we present a global SIF dataset produced from TROPOMI measurements within the TROPOSIF project funded by the European Space Agency. The current version of the TROPOSIF dataset covers the time period between May 2018 and April 2021. Baseline SIF retrievals are derived from the 743–758 nm window. A secondary SIF dataset derived from an extended fitting window (735–758 nm window) is included. This provides an enhanced signal-to-noise ratio at the expense of a higher sensitivity to atmospheric effects. Spectral reflectance spectra at seven 3-nm windows devoid of atmospheric absorption within the 665–785 nm range are also included in the TROPOSIF dataset as an important ancillary variable to be used in combination with SIF. The methodology to derive SIF and ancillary data as well as results from an initial data quality assessment are presented in this work. The TROPOSIF dataset is available through the following Digital Object Identifier (DOI) (Guanter et al., 2021).

Luis Guanter et al.

Status: open (until 24 Aug 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-199', Anonymous Referee #1, 07 Jul 2021 reply

Luis Guanter et al.

Data sets

The TROPOSIF global sun-induced fluorescence data set from the Sentinel-5P TROPOMI mission. TROPOSIF-L2B [Data set], ESA S5P+ Innovation Datasets. European Space Agency Guanter, L., Bacour, C., Schneider, A., Aben, I., van Kempen, T. A., Maignan, F., Retscher, C., Köhler, P., Frankenberg, C., Joiner, J., and Zhang, Y.

Luis Guanter et al.


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Short summary
Sun-induced chlorophyll fluorescence (SIF) is an electromagnetic signal emitted by plants in the red and far-red parts of the spectrum. It has a functional link to photosynthesis and can be measured by satellite instruments, which makes it an important variable for the remote monitoring of the photosynthetic activity of vegetation ecosystems around the world. In this contribution we present a SIF dataset derived from the new Sentinel-5P TROPOMI missions.