Derivation of regional aerodynamic roughness length by combining optical remote sensing and ground measurements over agricultural land in Heihe River Basin

Qiting Chen, Li Jia, Ronald Hutjes

Research output: Chapter in Book/Report/Conference proceedingConference paper

Abstract

Information of temporal and spatial variation of aerodynamic roughness length is required in most land surface models. The current research presents a practical approach for determining spatially distributed vegetation aerodynamic roughness length with fine temporal and spatial resolution by combining remote sensing and ground measurements. The basic framework of Raupach (1992), with the bulk surface parameters revised by Jasinski et al. (2005) has been applied to optical remote sensing data of HJ-1A/1B missions. In addition, a method for estimating regional scale vegetation height was introduced, so the aerodynamic roughness length, which is more preferred by users than the height normalized form has been developed. Direct validation on different vegetation classes have finally been performed taking advantage of the data-dense field experiments of Heihe Watershed Allied Telemetry Experimental Research (HiWATER). The roughness model had an overall good performance on most of Eddy Covariance sites of HiWATER. However, deviations still existed on different sites, and these have been further analyzed.

Original languageEnglish
Title of host publicationRemote Sensing and Modeling of the Atmosphere, Oceans, and Interactions V
EditorsGuosheng Liu, Tiruvalam N. Krishnamurti
PublisherSPIE
ISBN (Electronic)9781628413328
DOIs
Publication statusPublished - 18 Nov 2014
EventRemote Sensing and Modeling of the Atmosphere, Oceans, and Interactions V - Beijing, China
Duration: 15 Oct 201416 Oct 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9265
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceRemote Sensing and Modeling of the Atmosphere, Oceans, and Interactions V
CountryChina
CityBeijing
Period15/10/1416/10/14

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Keywords

  • Aerodynamic roughness length
  • agricultural
  • Heihe
  • regional scale
  • remote sensing

Cite this

Chen, Q., Jia, L., & Hutjes, R. (2014). Derivation of regional aerodynamic roughness length by combining optical remote sensing and ground measurements over agricultural land in Heihe River Basin. In G. Liu, & T. N. Krishnamurti (Eds.), Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions V [926504] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9265). SPIE. https://doi.org/10.1117/12.2068995