Impact of surface-heterogeneity on atmosphere and land-surface interactions

Abstract Land-surface heterogeneity occurs on many scales, but its inclusion remains an unsolved problem in land-surface and atmospheric boundary-layer schemes for weather and climate models. We investigate the propagation of land-surface heterogeneity in a convective boundary layer using an atmosphere and land-surface coupled large-eddy model. Simulations are made for land surfaces of different heterogeneity scales and a uniform land surface. A multi-scale analysis is carried out and it is found that while domain-and-time averaged fluxes and state variables are not sensitive to land-surface heterogeneity, atmospheric patterns are. Close to the surface, atmospheric patterns are dominated by land-surface forced patterns; away from the surface, “eigen” patterns dominate and forced patterns reemerge for large averaging times. While small-scale land-surface features are more rapidly destroyed by turbulence, large-scale features can persist over hundreds of meters.

[1]  Nathaniel A. Brunsell,et al.  Surface heterogeneity impacts on boundary layer dynamics via energy balance partitioning , 2010 .

[2]  Jielun Sun,et al.  Observations of Fluxes and Inland Breezes over a Heterogeneous Surface , 1994 .

[3]  Roni Avissar,et al.  An Evaluation of the Scale at which Ground-Surface Heat Flux Patchiness Affects the Convective Boundary Layer Using Large-Eddy Simulations , 1998 .

[4]  M. Parlange,et al.  Surface length scales and shear stress: Implications for land‐atmosphere interaction over complex terrain , 1999 .

[5]  Dominique Courault,et al.  Impact of surface heterogeneity on a buoyancy-driven convective boundary layer in light winds , 2007 .

[6]  Steven A. Margulis,et al.  Evaluation of a fully coupled large‐eddy simulation–land surface model and its diagnosis of land‐atmosphere feedbacks , 2010 .

[7]  Clemens Simmer,et al.  A downscaling scheme for atmospheric variables to drive soil–vegetation–atmosphere transfer models , 2010 .

[8]  Siegfried Raasch,et al.  Large-Eddy Simulations of Surface Heterogeneity Effects on the Convective Boundary Layer During the LITFASS-2003 Experiment , 2012, Boundary-Layer Meteorology.

[9]  Roni Avissar,et al.  Scaling of land-atmosphere interactions: An atmospheric modelling perspective , 1995 .

[10]  Susanne Crewell,et al.  Large-Eddy Atmosphere–Land-Surface Modelling over Heterogeneous Surfaces: Model Development and Comparison with Measurements , 2013, Boundary-Layer Meteorology.

[11]  Chin-Hoh Moeng,et al.  The Effects of Nonhomogeneous Surface Fluxes on the Convective Boundary Layer: A Case Study Using Large-Eddy Simulation. , 1990 .

[12]  Song-Lak Kang,et al.  The Effects of Mesoscale Surface Heterogeneity on the Fair-Weather Convective Atmospheric Boundary Layer , 2008 .

[13]  Franco Catalano,et al.  Large-Eddy Simulation of the Daytime Boundary Layer in an Idealized Valley Using the Weather Research and Forecasting Numerical Model , 2010 .

[14]  Clemens Simmer,et al.  Patterns in Soil–Vegetation–Atmosphere Systems: Monitoring, Modeling, and Data Assimilation , 2010 .

[15]  W. Kustas,et al.  Estimating Spatial Variability in Atmospheric Properties over Remotely Sensed Land Surface Conditions , 2008 .

[16]  Siegfried Raasch,et al.  Large Eddy Simulation of Thermally Induced Oscillations in the Convective Boundary Layer , 2002 .

[17]  E. Patton,et al.  The Effect of Mesh Resolution on Convective Boundary Layer Statistics and Structures Generated by Large-Eddy Simulation , 2011 .

[18]  Steven A. Margulis,et al.  Investigation of the impacts of vegetation distribution and evaporative cooling on synthetic urban daytime climate using a coupled LES—LSM model , 2011 .

[19]  J. Dudhia,et al.  Coupling an Advanced Land Surface–Hydrology Model with the Penn State–NCAR MM5 Modeling System. Part I: Model Implementation and Sensitivity , 2001 .

[20]  Nigel Wood,et al.  The influence of static stability on the effective roughness lengths for momentum and heat transfer , 1991 .

[21]  Siegfried Raasch,et al.  An Analysis Of Secondary Circulations And Their Effects Caused By Small-Scale Surface Inhomogeneities Using Large-Eddy Simulation , 2001 .

[22]  Steven A. Margulis,et al.  On the impact of surface heterogeneity on a realistic convective boundary layer , 2009 .

[23]  Chin-Hoh Moeng,et al.  The Influence of Idealized Heterogeneity on Wet and Dry Planetary Boundary Layers Coupled to the Land Surface. , 2005 .

[24]  Xuhui Cai,et al.  Flux Footprints in the Convective Boundary Layer: Large-Eddy Simulation and Lagrangian Stochastic Modelling , 2010 .

[25]  Clemens Simmer,et al.  Disaggregation of screen-level variables in a numerical weather prediction model with an explicit simulation of subgrid-scale land-surface heterogeneity , 2012, Meteorology and Atmospheric Physics.

[26]  Steven A. Margulis,et al.  Application of Dynamic Subgrid-scale Models for Large-eddy Simulation of the Daytime Convective Boundary Layer over Heterogeneous Surfaces , 2006 .

[27]  Paul S. Addison,et al.  The Illustrated Wavelet Transform Handbook Introductory Theory And Applications In Science , 2002 .

[28]  Yaping Shao,et al.  Soil‐layer configuration requirement for large‐eddy atmosphere and land surface coupled modeling , 2013 .

[29]  L. Mahrt,et al.  An Adaptive Multiresolution Data Filter: Applications to Turbulence and Climatic Time Series , 1994 .

[30]  Roni Avissar,et al.  Using Similarity Theory to Parameterize Mesoscale Heat Fluxes Generated by Subgrid-Scale Landscape Discontinuities in GCMs , 1995 .

[31]  B. Stevens,et al.  Observations, experiments, and large eddy simulation , 2001 .

[32]  R. Koster,et al.  Modeling the land surface boundary in climate models as a composite of independent vegetation stands , 1992 .

[33]  Roger A. Pielke,et al.  A parameterization of heterogeneous land surfaces for atmospheric numerical models and its impact on regional meteorology , 1989 .