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

Junhong Lee, Jinkyu Hong

Research output: Contribution to journalArticlepeer-review

3 Citations (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

Bibliographical note

Funding Information:
This research was supported by the Korean Meteorological Administration Research and Development Program under grant KMIPA2015-2063. We thank the reviewers and the Editor for their valuable comments on this study. The modeling results and the canopy data presented in this study are available upon request to the corresponding author (jhong@yonsei.ac.kr/http://eapl. yonsei.ac.kr).

Publisher Copyright:
© 2016. American Geophysical Union. All Rights Reserved.

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

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