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@ARTICLE{QuirosVargas:1050507,
      author       = {Quiros-Vargas, Juan and Brogi, Cosimo and Damm, Alexander
                      and Siegmann, Bastian and Rademske, Patrick and
                      Burchard-Levine, Vicente and Krieger, Vera and Schmidt,
                      Marius and Hanuš, Jan and Martello, Mauricio and
                      Weihermüller, Lutz and Muller, Onno and Rascher, Uwe},
      title        = {{S}olar-induced chlorophyll fluorescence ({SIF}) tracks
                      variations in the soil-plant available water ({PAW}): a
                      multiyear analysis on three crops},
      journal      = {Science of remote Sensing},
      volume       = {13},
      issn         = {2666-0172},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {FZJ-2026-00275},
      pages        = {100367 -},
      year         = {2026},
      abstract     = {Restrictions in the soil water availability can strongly
                      impact crop productivity. The increasing frequency
                      andseverity of drought events, as a result of global
                      warming, has made the assessment of drought stress effects
                      onvegetation of utmost importance for meeting humanity's
                      agricultural production needs. Recent advances inremote
                      sensing of solar-induced chlorophyll fluorescence (SIF)
                      provide a basis for new approaches to directlyassess crop
                      water status, since SIF is closely related to photosynthesis
                      and, thus, to early plant physiologicalprocesses triggered
                      by limitations in the water supply. This study provides new
                      insights into the effect of varyinglevels of plant available
                      water (PAW) in the soil on SIF emissions. We used several
                      SIF datasets acquired with thehigh-performance airborne
                      imaging spectrometer HyPlant during five subsequent
                      vegetation periods (2018,2019, 2020, 2021 and 2022), each
                      having a different precipitation regime. We normalized the
                      SIF maps for theunderlying effects of canopy structure,
                      calculated SIF emission efficiency (eSIF) and selected
                      various crop fieldsincluding sugar beet, wheat and potato.
                      Maps of eSIF were compared with spatial PAW patterns, which
                      werederived from a forward soil infiltration model. Our
                      results show positive correlation between eSIF and PAW
                      inrainfed sugar beet fields at early growing stage, which
                      remained consistent when accounting for variations in
                      theleaf area index (LAI). This suggests that eSIF variations
                      in sugar beet reflect the spatial reduction of
                      photosynthesiscaused by reduced PAW. In irrigated potato
                      fields, conversely, no eSIF-PAW correlations were found.
                      Thisindicates the absence of leaf-level water stress in
                      these well-irrigated fields. In rainfed winter wheat fields
                      thatwere already in a late developmental stage, the
                      variations in the SIF signal were dominated by locally
                      differentripening, i.e., chlorophyll degradation, and
                      therefore not representative of changing PAW. With this
                      study, wecould demonstrate that normalized airborne SIF
                      measurements are related to the functional water stress
                      responsein different crops. This study supports future
                      investigations on the development of SIF-based tools for
                      theimprovement of water management in agriculture.},
      cin          = {IBG-2},
      ddc          = {910},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/j.srs.2026.100367},
      url          = {https://juser.fz-juelich.de/record/1050507},
}