% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{DeCannire:911134,
      author       = {De Cannière, Simon and Vereecken, Harry and Defourny,
                      Pierre and Jonard, François},
      title        = {{R}emote {S}ensing of {I}nstantaneous {D}rought {S}tress at
                      {C}anopy {L}evel {U}sing {S}un-{I}nduced {C}hlorophyll
                      {F}luorescence and {C}anopy {R}eflectance},
      journal      = {Remote sensing},
      volume       = {14},
      number       = {11},
      issn         = {2072-4292},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2022-04450},
      pages        = {2642 -},
      year         = {2022},
      abstract     = {Climate change amplifies the intensity and occurrence of
                      dry periods leading to drought stress in vegetation. For
                      monitoring vegetation stresses, sun-induced chlorophyll
                      fluorescence (SIF) observations are a potential
                      game-changer, as the SIF emission is mechanistically coupled
                      to photosynthetic activity. Yet, the benefit of SIF for
                      drought stress monitoring is not yet understood. This paper
                      analyses the impact of drought stress on canopy-scale SIF
                      emission and surface reflectance over a lettuce and mustard
                      stand with continuous field spectrometer measurements. Here,
                      the SIF measurements are linked to the plant’s
                      photosynthetic efficiency, whereas the surface reflectance
                      can be used to monitor the canopy structure. The mustard
                      canopy showed a reduction in the biochemical component of
                      its SIF emission (the fluorescence emission efficiency at
                      760 nm—ϵ760) as a reaction to drought stress, whereas its
                      structural component (the Fluorescence Correction Vegetation
                      Index—FCVI) barely showed a reaction. The lettuce canopy
                      showed both an increase in the variability of its surface
                      reflectance at a sub-daily scale and a decrease in ϵ760
                      during a drought stress event. These reactions occurred
                      simultaneously, suggesting that sun-induced chlorophyll
                      fluorescence and reflectance-based indices sensitive to the
                      canopy structure provide complementary information. The
                      intensity of these reactions depend on both the soil water
                      availability and the atmospheric water demand. This paper
                      highlights the potential for SIF from the upcoming
                      FLuorescence EXplorer (FLEX) satellite to provide a unique
                      insight on the plant’s water status. At the same time,
                      data on the canopy reflectance with a sub-daily temporal
                      resolution are a promising additional stress indicator for
                      certain species.Keywords:SIF; photosynthesis; photochemical
                      reflectance index; isohydricity; non-photochemical
                      quenching; water limitation; light limitation; soil water
                      availability; vapour pressure deficit; vegetation index},
      cin          = {IBG-3},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000808661800001},
      doi          = {10.3390/rs14112642},
      url          = {https://juser.fz-juelich.de/record/911134},
}