NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Can CO2 Turbulent Flux Be Measured by Lidar? A Preliminary StudyThe vertical profiling ofCO2 turbulent fluxes in the atmospheric boundary layer (ABL) is investigated using a coherent differential absorption lidar (CDIAL) operated nearby a tall tower in Wisconsin during June 2007. A CDIAL can perform simultaneous range-resolved CO2 DIAL and velocity measurements. The lidar eddy covariance technique is presented. The aims of the study are (i) an assessment of performance and current limitation of available CDIAL for CO2 turbulent fluxes and (ii) the derivation of instrument specifications to build a future CDIAL to perform accurate range-resolved CO2 fluxes. Experimental lidar CO2 mixing ratio and vertical velocity profiles are successfully compared with in situ sensors measurements. Time and space integral scales of turbulence in the ABL are addressed that result in limitation for time averaging and range accumulation. A first attempt to infer CO2 fluxes using an eddy covariance technique with currently available 2-mm CDIAL dataset is reported.
Document ID
20110011454
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Gilbert, Fabien
(Ecole Polytechnique Palaiseau, France)
Koch, Grady
(NASA Langley Research Center Hampton, VA, United States)
Beyon, Jeffrey Y.
(NASA Langley Research Center Hampton, VA, United States)
Hilton, Timothy W.
(Pennsylvania State Univ. University Park, PA, United States)
Davis, Kenneth J.
(Pennsylvania State Univ. University Park, PA, United States)
Andrews, Arlyn
(National Oceanic and Atmospheric Administration Boulder, CO, United States)
Flamant, Pierre H.
(Ecole Polytechnique Palaiseau, France)
Singh, Upendra N.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 25, 2013
Publication Date
March 1, 2011
Publication Information
Publication: Journal of Atmospheric and Oceanic Technology
Volume: 28
Issue: 3
ISSN: 1520-0426
Subject Category
Meteorology And Climatology
Report/Patent Number
NF1676L-12660
Funding Number(s)
WBS: WBS 281945.02.11.01.52
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available