Mathematics – Logic
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004angeo..22.3869w&link_type=abstract
Annales Geophysicae, vol. 22, Issue 11, pp.3869-3887
Mathematics
Logic
16
Scientific paper
The actual impact on vertical transport of small-scale turbulence in the free atmosphere is still a debated issue. Numerous estimates of an eddy diffusivity exist, clearly showing a lack of consensus. MST radars were, and continue to be, very useful for studying atmospheric turbulence, as radar measurements allow one to estimate the dissipation rates of energy (kinetic and potential) associated with turbulent events. The two commonly used methods for estimating the dissipation rates, from the backscattered power and from the Doppler width, are discussed. The inference methods of a local diffusivity (local meaning here "within" the turbulent patch) by using the dissipation rates are reviewed, with some of the uncertainty causes being stressed. Climatological results of turbulence diffusivity inferred from radar measurements are reviewed and compared. As revealed by high resolution MST radar measurements, atmospheric turbulence is intermittent in space and time. Recent theoretical works suggest that the effective diffusivity of such a patchy turbulence is related to statistical parameters describing the morphology of turbulent events: filling factor, lifetime and height of the patches. It thus appears that a statistical description of the turbulent patches' characteristics is required in order to evaluate and parameterize the actual impact of small-scale turbulence on transport of energy and materials. Clearly, MST radars could be an essential tool in that matter.
No associations
LandOfFree
Turbulent diffusivity in the free atmosphere inferred from MST radar measurements: a review does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Turbulent diffusivity in the free atmosphere inferred from MST radar measurements: a review, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turbulent diffusivity in the free atmosphere inferred from MST radar measurements: a review will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1008852