OpenAIRE is about to release its new face with lots of new content and services.
During September, you may notice downtime in services, while some functionalities (e.g. user registration, login, validation, claiming) will be temporarily disabled.
We apologize for the inconvenience, please stay tuned!
For further information please contact helpdesk[at]

fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Wiin-Nielsen, A.; Brown, John A.; Drake, Margaret (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
Energy transformations between the zonal mean and the eddies have been computed from observed data for a single winter month, January 1962. The available data were the height fields of the 850, 700, 500, 300 and 200 mb surfaces. Our calculations are therefore based on the geostrophic or balanced approximations. The horizontal fields of the streamfunction and the thickness are written as one-dimensional Fourier series, and the energy transformation between the zonal mean and the different longitudinal wave-numbers are evaluated. In order to evaluate the energy transformations in the wave number regime, it is necessary to compute the meridional transports of momentum and heat as a function of the wave number. These results appear therefore as useful by-products of the calculations. The main conclusions which can be made on the basis of the calculations are: 1 The maximum transport of sensible heat occurs in the middle latitudes and at the lower elevations. More than 50% of the transport of sensible heat is carried out by wave numbers 1 to 4, while the next four wave numbers (5 to 8) transport half this amount. 1 The transport of momentum is toward the north south of about 55° N and toward the south north of this latitude. The maximum northward transport of momentum occurs at 35° N at higher elevations, while the maximum southward transport takes place at 65° N also at higher elevations. About 50% of the northward transport of momentum is carried out by wave numbers 1 to 4 and about 30% by the next four wave numbers (5 to 8). 1 The conversion of zonal available potential energy to eddy available potential energy is found to be positive for almost all wave numbers with a single maximum around the wave numbers 2 and 3. 1 The conversion of eddy kinetic energy to zonal kinetic energy is found to be positive when summed over all wave numbers. The conversion is much smaller than the conversion mentioned in 3. The spectrum is very irregular showing positive conversions for the small wave numbers, but negative conversions for some of the larger wave numbers. The conclusions mentioned above are tentative, since they are based on data from a single winter month. Computations for other winter months and for other seasons are being planned.DOI: 10.1111/j.2153-3490.1963.tb01386.x
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • BRISTORC,. L., 1959, Zonal wind errors in the barotropic model. Mo. Wea. Rev., vol. 87, pp. 57-63.
    • ELIASENE,., 1958, A study of the long atmospheric waves on the basis of zonal harmonic analysis. TeZZus, vol. 10,pp. 206-216.
    • GATES,W. L., 1961, Static stability measures in the atmosphere. J . Meteor., vol. 18, pp. 526-533.
    • MINTZY,., 1951, The geostrophic poleward flux of angular momentum in the month of January 1949. Tellus, vol. 3,pp. 195-200.
    • PHILLIPNS,. A., 1956, The general circulation of the atmosphere: a numerical experiment. Quart. J. Roy. Meteor. Soc., vol. 82, pp. 123-165.
    • SALTZMABN., 1957, Equations governing the energetics of the larger scales of atmospheric turbulence in the domain of wave numbers. J. Meteor., vol. 14, pp. 513-523.
    • SALTZMANB,., 1958, Some hemispheric spectral statistics. J . Meteor., vol. 16, pp. 259-263.
    • SALTZMABN., , FLEISHERA.,, 1960 a, Spectrum of kinetic energy transfer due to large-scale horizontal Reynolds stresses. Tellus, vol. 11, pp. 110-111.
    • SALTZMANB.,, FLEISHERA,., 19606, The modes of release of available potential energy in the atmosphere. J . Oeophys. Res., vol. 66, pp. 1215- 1222.
    • SALTZMABN., ,FLEISHERA, ., 1961, Further statistics of the modes of release of available potential energy. J. Geqhys. Rea., vol. 86, pp. 2271-2273.
    • SHUMANF,. G., 1957, Predictive consequences of certain physical inconsistencies in the geostrophic barotropic model. Mo. Wea. Rev., vol. 86, pp. 229-234.
    • SMAOORINSKJY.,,1963, General circulation experiments with the primitive equations, I-the basic experiment. Mo. Wea. Rev., vol. 91, pp. 99-166.
    • STARRV,. P., 1953, Note concerning the nature of the large-scale eddies in the atmosphere. Tellua, VOI. 6, pp. 494-498.
    • WHITE,R. M., 1954, The counter gradient flux of sensible heat in the lower stratosphere. Tellus, V O ~ .6, pp. 177-179.
    • WIIN-NIELSENA, ., 1959, A study of energy conversion and meridional circulation of the largescale motion in the atmosphere. Mo. Wea. Rev., vol. 8 7 , pp. 319-331.
    • WIIN-NIELSENA, ., BROWNJ, . A., 1960, On diagnostic computations of atmospheric heat sources and sinks and the generation of available potential energy. Proc. Intern. Symp. on Numerical Weather Prediction, Tokyo, pp. 593-613.
    • WIIN-NIELSEN,A., 1962, On transformation of kinetic energy between the vertical shear flow and the vertical mean flow in the atmosphere. Mo. Wea. Rev., vol. 90, pp. 311-323.
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article

Collected from

Cookies make it easier for us to provide you with our services. With the usage of our services you permit us to use cookies.
More information Ok