Nocturnal CO2 exchange over a tall forest canopy associated with intermittent low-level jet activity

Karipot, A.; Leclerc, M. Y.; Zhang, G.; Martin, T.; Starr, G.; Hollinger, D.; McCaughey, J. H.; Hendrey, G. R.

doi:10.1007/s00704-005-0183-7

Nocturnal CO₂ exchange over a tall forest canopy associated with intermittent low-level jet activity

Journal Article · Wed May 10 04:00:00 EDT 2006 · Theoretical and Applied Climatology

DOI:https://doi.org/10.1007/s00704-005-0183-7· OSTI ID:1009439

Karipot, A. ^[1]; Leclerc, M. Y.; Zhang, G.; Martin, T.; Starr, G.; Hollinger, D.; McCaughey, J. H.; Hendrey, G. R.

University of Georgia

Nocturnal eddy-covariance carbon dioxide fluxes have uncertainties arising from non-stationary atmospheric processes. Low-level jets (LLJ) are one of the prominent nocturnal boundary-layer phenomena observed over non-mountainous terrain, and are capable of generating shear and turbulence close to the ground. The influence of intermittent LLJ activity on nocturnal carbon dioxide exchange measurements is investigated using wind profile observations and eddy-covariance flux measurements over a tall forest canopy. Results suggest that the buildup and venting of CO₂ are closely associated with LLJ activity during the night. Of significance in quantifying nocturnal fluxes, this paper demonstrates how low-level jet activity introduces sporadic coupling between the canopy and the atmosphere.

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

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FG02-00ER63024

OSTI ID:: 1009439

Report Number(s):: DOE/ER/63024-8

Journal Information:: Theoretical and Applied Climatology, Journal Name: Theoretical and Applied Climatology Journal Issue: 3-4 Vol. 85; ISSN 0177-798X

Publisher:: Springer Nature

Country of Publication:: United States

Language:: English

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