The robustness of eddy correlation fluxes for Amazon rain forest conditions

B. Kruijt, J.A. Elbers, C. von Randow, A.C. Araújo, P.J. Oliveira, A. Culf, A.O. Manzi, A.D. Nobre, P. Kabat, E.J. Moors

Research output: Contribution to journalArticleAcademicpeer-review

100 Citations (Scopus)

Abstract

We analyzed errors and uncertainties in time-integrated eddy correlation data for sites in the Amazon. A well-known source of potential error in eddy correlation is through possible advective losses of CO2 emissions during calm nights. There are also questions related to the treatment of low frequencies, non-horizontal flow, and uncertainties in, e.g., corrections for tube delay and frequency loss, as well as the effect of missing data. In this study, we systematically explore these issues for the specific situation of flux measurements at two Amazon forest sites. Results indicate that, for this specific environment with tall forest and tall towers, errors and uncertainties caused by data spikes, delay corrections, and high-frequency loss are small (
Original languageEnglish
Pages (from-to)S101-S113
JournalEcological Applications
Volume14
Issue number4 Suppl.
DOIs
Publication statusPublished - 2004

Keywords

  • carbon-dioxide uptake
  • surface-air exchange
  • tall vegetation
  • micrometeorological observations
  • spatial variability
  • southwest amazonia
  • net carbon
  • layer
  • water
  • covariance

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