1993/06/01 by Brian J. Hoskins, Tercio Ambrizzi, Tércio Ambrizzi · 1,114 citations
Earth and Planetary Sciences · Environmental Science · #Barotropic fluid #Climate variability and models #Climatology #El Niño Southern Oscillation #Geology #Geophysics #Geopotential height #Jet (fluid) #Jet stream #Marine and coastal ecosystems #Mechanics #Meridional flow #Meteorology #Northern Hemisphere #Oceanographic and Atmospheric Processes #Perturbation (astronomy) #Physics #Potential vorticity #Rossby wave #Southern Hemisphere #Teleconnection #Vortex #Vorticity #Wavenumber #Zonal and meridional #Zonal flow (plasma)
paper · pdf · doi:10.1175/1520-0469(1993)050<1661:rwpoar>2.0.co;2
published in Journal of the Atmospheric Sciences 50(12), 1661-1671 (American Meteorological Society)
openalex publication_date 1993/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The response of a barotropic model, linearized about a climatological 300-mb December–February time-mean flow to localized forcing, is considered. In order to aid the design of the experiments and interpretation of the results, a simplified analysis is made of the basic flow in terms of zonal wind, meridional vorticity gradient, and stationary wavenumber. From the analysis the possible existence of a strong waveguide in the Asian jet and weaker waveguides in the North Atlantic and Southern Hemisphere jets is deduced. The possibility of propagation into the equatorial east Pacific and Atlantic oceans and even across these regions is also suggested. These features are confirmed by barotropic model integrations for a variety of perturbation vorticity source positions and shapes. These integrations also show preferred propagation regions arching across North America, from Europe to the Arabian Gulf and, in the Southern Hemisphere, into the equatorial Indian Ocean and Indonesian regions. They also show a tendency to produce a low-wavenumber, fast westward-moving “tail” along the Asian jet. Many of the features found in this study are remarkably consistent with observational teleconnection studies.