An analysis of turbulent heat fluxes and the energy balance during the REFLEX campaign

C. van der Tol, W.J. Timmermans, C. Corbari, A. Carrara, Joris Timmermans, Z. Su

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
25 Downloads (Pure)

Abstract

Three eddy covariance stations were installed at the Barrax experimental farm during the Land-Atmosphere Exchanges (REFLEX) airborne training and measurement campaign to provide ground truth data of energy balance fluxes and vertical temperature and wind profiles. The energy balance closure ratio (EBR) was 105% for a homogeneous camelina site, 86% at a sparse reforestation site, and 73% for a vineyard. We hypothesize that the lower closure in the last site was related to the limited fetch. Incorporating a vertical gradient of soil thermal properties decreased the RMSE of the energy balance at the camelina site by 16 W m−2. At the camelina site, eddy covariance estimates of sensible and latent heat fluxes could be reproduced well using mean vertical profiles of wind and temperature, provided that the Monin—Obukhov length is known. Measured surface temperature and sensible heat fluxes suggested high excess resistance for heat (kB−1 = 17).
Original languageEnglish
Pages (from-to)1516-1539
JournalActa geophysica
Volume65
Issue number6
DOIs
Publication statusPublished - 2015

Keywords

  • ITC-ISI-JOURNAL-ARTICLE
  • ITC-HYBRID

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