This study presents the first deployment in field campaigns of aballoon-borne turbulence probe, developed with a sonic anemometer and aninertial motion sensor suspended below a tethered balloon. This systemmeasures temperature and horizontal and vertical wind at high frequency andallows the estimation of heat and momentum fluxes as well as turbulentkinetic energy in the lower part of the boundary layer. The system wasvalidated during three field experiments with different convectiveboundary-layer conditions, based on turbulent measurements from instrumentedtowers and aircraft.
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