Methods and limitations in validation of footprint models

Foken, T.; Leclerc, M. Y.

doi:10.1016/j.agrformet.2004.07.015

Methods and limitations in validation of footprint models

Journal Article · Tue Nov 30 23:00:00 EST 2004 · Agricultural and Forest Meteorology

DOI:https://doi.org/10.1016/j.agrformet.2004.07.015· OSTI ID:1009421

Foken, T. ^[1]; Leclerc, M. Y.

University of Georgia

This paper assesses the progress made over the last decade in validating footprint models, and highlights shortcomings which need addressing. This paper also presents alternative methods of validating footprint models. The vigorous expansion of footprint models was spurred by the development and subsequent widespread application of primarily analytical solutions to the advection–diffusion equation and Lagrangian simulations. In this paper, we draw attention to the range of experimental conditions supporting both a judicious use and application of these methods. We discuss present limitations restricting footprint model applicability, mostly for sites which depart from ideal conditions and model conditions which deviate from their original assumptions. Intercomparisons of footprint models reveal differences amongst the different footprint models, prompting subsequent recent validations of footprint models. Despite the few existing studies, the issue of validation remains an outstanding problem in micrometeorology. In this paper, three concepts are discussed and compared: (1) the use of artificial tracer gases; (2) the use of natural sources of scalars; (3) the presence of obstacles in the flowfield and their influence on the footprints. Finally, the conditions of applicability of each method are discussed.

Research Organization:: Univ. of Georgia, Athens, GA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FG02-00ER63024

OSTI ID:: 1009421

Report Number(s):: DOE/ER/63024-1

Journal Information:: Agricultural and Forest Meteorology, Journal Name: Agricultural and Forest Meteorology Journal Issue: 3-4 Vol. 127; ISSN 0168-1923

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

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54 ENVIRONMENTAL SCIENCES
Atmospheric tracers
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Forest-atmosphere exchange
Micrometeorology
Source area
Validation
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Methods and limitations in validation of footprint models

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