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@INPROCEEDINGS{Zhang:1021923,
      author       = {Zhang, Yikui and Wangner, Niklas and Görgen, Klaus and
                      Kollet, Stefan},
      title        = {{A}nalysis of {C}loud {W}ater {S}caling to {S}urface
                      {M}oisture {F}luxes from {F}ully {C}oupled {T}errestrial
                      {S}imulations},
      reportid     = {FZJ-2024-01071},
      year         = {2023},
      abstract     = {Land-atmosphere (L-A) coupling is important for
                      understanding regional climate functioning and influencing
                      hydrometeorological extremes such as droughts and heatwaves,
                      but accurate determination of L-A coupling strength is
                      difficult due to complex feedback loops and varying
                      background atmospheric conditions. The role of clouds is
                      often ignored or simplified in previous L-A coupling
                      studies, and the non-linear control of evapotranspiration
                      (ET) on cloud formation and convection is poorly
                      understood.This study aims to diagnose the feedback between
                      surface moisture fluxes and cloud moisture under different
                      atmospheric conditions to improve our understanding of L-A
                      coupling, based on simulations with a fully coupled regional
                      climate model, the Terrestrial Systems Modelling Platform
                      (TSMP), over the COrdinated Regional Downscaling EXperiment
                      (CORDEX) EUR-11 domain at about 12 km resolution from 1979
                      to 2021. We investigated the L-A coupling strength by
                      calculating the Pearson correlation coefficient and
                      estimating the scaling relationship between ET, boundary
                      layer variables, cloud water content and its dynamics
                      (ΔTQC/Δt) under dry/wet and low/medium/high atmospheric
                      moisture dynamic regimes. In addition, the co-variability of
                      ΔTQC/Δt on ET and moisture flux dynamics is quantified
                      based on the quantile phase plot.The analysis indicates a
                      positive role of surface moisture flux in influencing cloud
                      moisture dynamics. The coupling hotspots between surface
                      moisture flux and cloud moisture in Europe are mainly
                      identified in the water-limited regions of Eastern Europe
                      and the Mediterranean. Two types of scaling relationships
                      were classified by K-means clustering over all grid points
                      with a clear north-south contrast, and local dry/wet
                      conditions could be the determining factor. Furthermore, the
                      coupling analysis highlights the role of enhanced moisture
                      flux dynamics in reducing the strength of the local L-A
                      moisture flux coupling, and it can determine the scaling
                      types of ET-ΔTQC/Δt at the local scale.},
      month         = {Dec},
      date          = {2023-12-11},
      organization  = {American Geophysical Union Fall
                       Meeting 2023, San Francisco (USA), 11
                       Dec 2023 - 15 Dec 2023},
      subtyp        = {Other},
      cin          = {IBG-3},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217) / SFB 1502 D02 - Simulation anthropogen bedingter
                      Veränderungen in regionalen Wasser- und Energiekreisläufen
                      (D02) (495897999)},
      pid          = {G:(DE-HGF)POF4-2173 / G:(GEPRIS)495897999},
      typ          = {PUB:(DE-HGF)6},
      doi          = {10.34734/FZJ-2024-01071},
      url          = {https://juser.fz-juelich.de/record/1021923},
}