Summary
Radiative and dynamical energy exchanges in the planetary boundary layer are investigated by the simultaneous operation of a triaxial Doppler sodar, a zenith-pointing cryogenic radiometer with a bandpass centred around 850 μm wavelength, and additional meteorological equipment for near-ground reference. The two instruments provide measurements of the wind field and of the atmospheric radiative temperature, respectively. Two measurement campaigns were carried out in the Rome area in the periods 12–18 Sept. 1990 and 16–22 Sept. 1991. Data were analysed for correlation and used to calculate kinematic eddy sensible heat fluxes. Depending on the meteorological conditions, high values of correlation were found between the fluctuations of the height-averaged (300 m) vertical wind speed and the radiative temperature, in the presence of clear-sky convection. The highest values of correlation were obtained for delays of a few minutes, as expected in agreement with typical dimensions of convective structures in the boundary layer. Estimates of the kinematic eddy sensible heat flux gave average values as high as 0.14 K m s−1 in daytime and 0.005 K m s−1 at night.
Similar content being viewed by others
References
G. Dubosclard, R. Cordesses, D. Ramond andH. Sauvageot:Acoustic soundings at the top of a high altitude summit, inProceedings of the II International Symposium on Acoustic Remote Sensing of the Atmosphere and Oceans, IFA/CNR, Rome, Italy, V1 (1983).
G. Dubosclard, G. Coupinot, J. Hecquet andH. Sauvageot:Use of a sodar for the determination of seeing quality, inProceedings of the III International Symposium on Acoustic Remote Sensing of the Atmosphere and Oceans edited byA. Weill,CNET/CRPE, Issy-les-Moulineaux, France (1985), p. 475.
M. A. Kallistratova, A. E. Gur'yainov andP. V. Sheglov:Atmospheric acoustic sounding in astronomical site testing, inProceedings of the IV International Symposium on Acoustic Remote Sensing of the Atmosphere and Oceans, ADFA, Canberra, Australia, 36 (1988).
M. T. Decker, F. Einaudi andJ. J. Finnigan:J. Appl., Meteorol.,20, 1231 (1981).
P. Ciotti, A. Silbermann, D. Solimini andEd. R. Westwater:IEEE Trans. Geosci. Remote Sensing, GE-24, 267 (1986).
G. Elisei, M. Maini, A. Marzorati, M. G. Morselli, G. Fiocco, S. Cantarano andG. Mastrantonio:Atmos. Res.,20, 109 (1986).
G. Mastrantonio andG. Fiocco:J. Appl. Meteorol.,21, 823 (1982).
M. Berico, G. Fiocco andA. Ricotta:Spatial and temporal correlation in the intensity of vertical velocity field obtained with a triaxial Doppler sodar, inProceedings of the I International Symposium on Acoustic Remote Sensing of the Atmosphere and Oceans, Calgary, Canada (1981).
G. Fiocco, M. G. Ciminelli andG. Mastrantonio:Atmos. Res.,20, 199 (1986).
C. Ceccarelli, G. Dall'Oglio, M. T. Di Bari, L. Pizzo, andC. Santillo:Cryogenics,30, 530 (1990).
G. Dall'Oglio, L. Pizzo, L. Piccirillo andL. Martinis:Cryogenics,31, 61 (1991).
R. B. Stull:An Introduction to Boundary Layer Meteorology, (Kluwer Academic Publishers, 1990).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Abbate, G., Fiocco, G., Dall'Oglio, G. et al. Measurements of vertical kinematic eddy sensible heat flux by means of a doppler sodar and a cryogenic radiometer. Il Nuovo Cimento C 17, 265–273 (1994). https://doi.org/10.1007/BF02509167
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02509167