Implementation of spaceborne lidar-retrieved canopy height in the WRF model

Junhong Lee, Jinkyu Hong

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Canopy height is closely related to biomass and aerodynamic properties, which regulate turbulent transfer of energy and mass at the soil-vegetation-atmosphere continuum. However, this key information has been prescribed as a constant value in a fixed plant functional type in atmospheric models. This paper is the first to report impacts of using realistic forest canopy height, retrieved from spaceborne lidar, on regional climate simulation by using the canopy height data in the Weather Research and Forecasting (WRF) model’s land surface model. Numerical simulations were conducted over the Amazon Basin during summer season. Over this region, the lidar-retrieved canopy heights were higher than the default values used in the WRF, which are dependent only on plant functional type. By modifying roughness length and zero-plane displacement height, the change of canopy height resulted in changes in surface energy balance by regulating aerodynamic conductances and vertical temperature gradient, thusmodifying the lifting condensation level and equivalent potential temperature in the atmospheric boundary layer. Our analysis also showed that the WRFmodel better reproduced the observed precipitation when lidar-retrieved canopy height was used over the Amazon Basin.

Original languageEnglish
Pages (from-to)6863-6876
Number of pages14
JournalJournal of Geophysical Research
Volume121
Issue number12
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

lidar
canopies
Optical radar
optical radar
weather
forecasting
canopy
Aerodynamics
Atmospheric boundary layer
Energy balance
Interfacial energy
aerodynamics
Thermal gradients
Condensation
Biomass
Surface roughness
Soils
soil-plant-atmosphere interactions
basins
atmospheric boundary layer

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

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abstract = "Canopy height is closely related to biomass and aerodynamic properties, which regulate turbulent transfer of energy and mass at the soil-vegetation-atmosphere continuum. However, this key information has been prescribed as a constant value in a fixed plant functional type in atmospheric models. This paper is the first to report impacts of using realistic forest canopy height, retrieved from spaceborne lidar, on regional climate simulation by using the canopy height data in the Weather Research and Forecasting (WRF) model’s land surface model. Numerical simulations were conducted over the Amazon Basin during summer season. Over this region, the lidar-retrieved canopy heights were higher than the default values used in the WRF, which are dependent only on plant functional type. By modifying roughness length and zero-plane displacement height, the change of canopy height resulted in changes in surface energy balance by regulating aerodynamic conductances and vertical temperature gradient, thusmodifying the lifting condensation level and equivalent potential temperature in the atmospheric boundary layer. Our analysis also showed that the WRFmodel better reproduced the observed precipitation when lidar-retrieved canopy height was used over the Amazon Basin.",
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Implementation of spaceborne lidar-retrieved canopy height in the WRF model. / Lee, Junhong; Hong, Jinkyu.

In: Journal of Geophysical Research, Vol. 121, No. 12, 01.01.2016, p. 6863-6876.

Research output: Contribution to journalArticle

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