Energy partition between the hemispheres when an equatorial Kelvin or Yanai wave reaches an inclined eastern boundary.

Thursday, 18 December 2014
Dennis W Moore, Pacific Marine Environmental Laboratory, Seattle, WA, United States, Ted Durland, Oregon State University, Corvallis, OR, United States and Hristina G Hristova, Joint Institute for Marine and Atmospheric Research, Seattle, WA, United States
When an intermediate frequency equatorial wave propagating to the east
encounters an eastern boundary, the incident energy propagates poleward in both
hemispheres. If the boundary is perpendicular to the equator, half the energy goes
North, and half goes South. For incident waves with dimensionless frequency between
{1 - sqrt(1/2)} and {1 + sqrt(1/2)}, there are no reflected waves with real wave number
carrying energy back to the west along the equator. For this frequency range we
investigate the partition of poleward propagating energy between the two hemispheres
for incident Kelvin and Yanai waves as a function of frequency and boundary orientation.