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Title: Modeling Spatial Heterogeneity in Surface Turbulent Heat Flux in the U.S. Southern Great Plains

Journal Article · · Journal of Geophysical Research: Atmospheres
DOI:https://doi.org/10.1029/2019jd032255· OSTI ID:1659398
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [2]; ORCiD logo [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate and Ecosystem Sciences Division
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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Advances in numerical modeling of cloud dynamics are driving a need for improved land model prediction at convective storm scales. Here, satellite and ground-based vegetation remote sensing data were combined with land model experiments to more accurately characterize land surface spatial heterogeneity in the Community Land Model (CLM4.0). The new subgrid classification of plant functional types (PFT) and leaf area index (LAI) enables consistent comparison between models and ground-based flux measurements in the U.S. southern Great Plains. Errors in vegetation data sets (inferred from comparison between 250 m satellite and ground-based LAI), while large, had less impact on the simulated characteristics of spatial heterogeneity compared to errors in model representation of surface energy partitioning (between latent and sensible heat flux) and its relationship to LAI. Predicted spatial heterogeneity in surface energy partitioning was enhanced after replacing soil and stomatal resistance parameters with a new set that better predicts the observed relationship to LAI. These modifications increase the number of smaller (mesoscale) dry land patches having higher sensible heat flux. The parameter experiments suggest that vegetation state and processes (transpiration) act to broaden the size spectrum of surface heat flux heterogeneity, which can influence clouds and convective initiation. Moreover, improvements in vegetation input data and model parameters had partially compensating effects on surface flux heterogeneity, indicating the importance of evaluating input data and parameterizations together to improve prediction at higher spatial resolutions.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC52-07NA27344; AC02-05CH11231
OSTI ID:
1659398
Alternate ID(s):
OSTI ID: 1635282
Report Number(s):
LLNL-JRNL-813967; 1022227
Journal Information:
Journal of Geophysical Research: Atmospheres, Vol. 125, Issue 13; ISSN 2169-897X
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (51)

A preferred scale for landscape forced mesoscale circulations? journal November 2003
Accelerating Progress in Global Atmospheric Model Development through Improved Parameterizations: Challenges, Opportunities, and Strategies journal July 2010
Multi-Crop Green LAI Estimation with a New Simple Sentinel-2 LAI Index (SeLI) journal February 2019
Landscapes as patches of plant functional types: An integrating concept for climate and ecosystem models: PLANT FUNCTIONAL TYPES AND CLIMATE MODELS journal May 2002
Irrigation Effects on Land–Atmosphere Coupling Strength in the United States journal April 2017
The Impact of Variable Land‐Atmosphere Coupling on Convective Cloud Populations Observed During the 2016 HI‐SCALE Field Campaign journal August 2019
Using ARM Observations to Evaluate Climate Model Simulations of Land-Atmosphere Coupling on the U.S. Southern Great Plains: Model LAC Evaluation by ARM Data journal November 2017
A Large-Eddy Simulation Study of Moist Convection Initiation over Heterogeneous Surface Fluxes journal September 2011
Factors controlling evaporation and energy partitioning beneath a deciduous forest over an annual cycle journal May 2000
Surface energy partitioning over four dominant vegetation types across the United States in a coupled regional climate model (Weather Research and Forecasting Model 3-Community Land Model 3.5): ENERGY FLUX PARTITIONING IN WRF3-CLM3.5 journal March 2012
The role of land use change on the development and evolution of the west coast trough, convective clouds, and precipitation in southwest Australia journal January 2011
"Wet/dry Daisyworld": a conceptual tool for quantifying the spatial scaling of heterogeneous landscapes and its impact on the subgrid variability of energy fluxes journal July 2005
Three-dimensional numerical study of shallow convective clouds and precipitation induced by land surface forcing journal March 1996
Incorporating organic soil into a global climate model journal June 2007
Assessing a dry surface layer-based soil resistance parameterization for the Community Land Model using GRACE and FLUXNET-MTE data journal September 2014
Land-atmosphere coupling and climate prediction over the U.S. Southern Great Plains: LAND-ATMOSPHERE COUPLING AND CLIMATE journal October 2016
Circling in on Convective Organization journal June 2019
The Partitioning of Evapotranspiration into Transpiration, Soil Evaporation, and Canopy Evaporation in a GCM: Impacts on Land–Atmosphere Interaction journal August 2007
The Influence of Land Surface Heterogeneities on Cloud Size Development journal October 2014
Clouds prefer native vegetation journal June 2002
Reliable, robust and realistic: the three R's of next-generation land-surface modelling journal January 2015
Numerical Simulations of the Effect of Soil Moisture and Vegetation Cover on the Development of Deep Convection journal September 1995
Assessing the use of subgrid land model output to study impacts of land cover change: Subgrid Output for Land Cover Impacts journal June 2016
Vegetation controls on surface heat flux partitioning, and land-atmosphere coupling: VEGETATION AND LAND-ATMOSPHERE COUPLING journal November 2015
Coupling between Large-Scale Atmospheric Processes and Mesoscale Land–Atmosphere Interactions in the U.S. Southern Great Plains during Summer. Part I: Case Studies journal December 2004
Cold Pool‐Land Surface Interactions in a Dry Continental Environment journal July 2018
Energy Balance Bowen Ratio Station (EBBR) Instrument Handbook report April 2018
Morphology of breeze circulations induced by surface flux heterogeneities and their impact on convection initiation: Breeze Circulations Induced by Surface Heterogeneities
  • Rochetin, Nicolas; Couvreux, Fleur; Guichard, Françoise
  • Quarterly Journal of the Royal Meteorological Society, Vol. 143, Issue 702 https://doi.org/10.1002/qj.2935
journal December 2016
Evaluating soil moisture feedback on convective triggering: Roles of convective and land‐model parameterizations journal December 2018
Observational Evidence of State‐Dependent Positive and Negative Land Surface Feedback on Afternoon Deep Convection Over the Southern Great Plains journal March 2020
The Impact of Land-Surface Wetness Heterogeneity on Mesoscale Heat Fluxes journal November 1994
Separating the effects of phenology and diffuse radiation on gross primary productivity in winter wheat: PHENOLOGY, DIFFUSE RADIATION, AND GPP journal July 2016
Response of moist convection to multi-scale surface flux heterogeneity: Response of Moist Convection to Multi-scale Surface Flux Heterogeneity journal May 2016
Representing a new MODIS consistent land surface in the Community Land Model (CLM 3.0) journal January 2007
Shallow cumulus rooted in photosynthesis journal March 2014
Regional CO 2 and latent heat surface fluxes in the Southern Great Plains: Measurements, modeling, and scaling journal January 2009
Role of surface heat fluxes underneath cold pools journal January 2016
Three-dimensional model study of organized mesoscale circulations induced by vegetation journal March 1996
Representing nighttime and minimum conductance in CLM4.5: global hydrology and carbon sensitivity analysis using observational constraints journal January 2017
Representing Intrahillslope Lateral Subsurface Flow in the Community Land Model journal December 2019
Afternoon rain more likely over drier soils journal September 2012
Transpiration in the global water cycle journal June 2014
The Community Land Model Version 5: Description of New Features, Benchmarking, and Impact of Forcing Uncertainty journal December 2019
Seasonal and interannual variability in 13 C composition of ecosystem carbon fluxes in the U.S. Southern Great Plains journal January 2011
The Effect of Land Surface Heterogeneity and Background Wind on Shallow Cumulus Clouds and the Transition to Deeper Convection journal February 2019
Eddy Correlation Flux Measurement System (ECOR) Instrument Handbook report August 2018
The Formation of Wider and Deeper Clouds as a Result of Cold-Pool Dynamics journal August 2014
The influence of land cover on surface energy partitioning and evaporative fraction regimes in the U.S. Southern Great Plains: Influence of Land Cover in U.S. SGP journal June 2017
Impacts of a new bare-soil evaporation formulation on site, regional, and global surface energy and water budgets in CLM4: A NEW BARE-SOIL EVAPORATION FORMULATION journal July 2013
Predicting Soil Albedo from Soil Color and Spectral Reflectance Data journal May 2000
Coupling between Large-Scale Atmospheric Processes and Mesoscale Land–Atmosphere Interactions in the U.S. Southern Great Plains during Summer. Part II: Mean Impacts of the Mesoscale journal December 2004

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