1971/12/01 by T. N. Krishnamurti · 1 citation
Earth and Planetary Sciences · Environmental Science · Medicine · Physics and Astronomy · #Atmospheric sciences #Climate variability and models #Climatology #Environmental science #Geology #Medicine #Northern Hemisphere #Observational study #Oceanographic and Atmospheric Processes #Solar and Space Plasma Dynamics #Southern Hemisphere #Tropics #Troposphere
paper · doi:10.1175/1520-0450(1971)010<1066:osottu>2.0.co;2
openalex publication_date 1971/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/07
Abstract Conventional and commerical aircraft wind observations over the global tropics have been used to prepare daily charts of the field of motion at the 200-mb level for June, July and August 1967. Computations describe the climatology of the field of motion (streamlies and isotachs) and the divergence and vorticity distributions. A number of dynamical computations are made utilizing these data. These include 1) A comparison of the strength of the rotational part of the wind with the total wind. 2) A description of the strength and geometry of the Hadley and Walker circulations. 3) An analysis of the ultralong waves (zonal wavenumbers 1 and 2). The waves, which are quasi-stationary, are shown to carry a large proportion of the total variance of the motion field and to have a very pronounced southwest to northeast tilt. The amplitude and motion of transient ultralong waves, wavenumbers 1 and 2, are studied on polar diagrams. It is shown that these waves are intermittent and rapidly moving. 4) An analys...