Commonly used methods fail to detect known propagation speeds of simulated signals from time–longitude (Hovmöller) diagrams
Yair De-Leonand Nathan Paldor
Yair De-Leon
Fredy and Nadine Herrmann Institute of Earth Sciences, The Hebrew
University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem,
9190401, Israel
Fredy and Nadine Herrmann Institute of Earth Sciences, The Hebrew
University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem,
9190401, Israel
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Using simulated signal of sea surface height anomalies (SSHA) where the phase speed of the dominant mode is known a priori, we demonstrate that four of the common methods employed in estimating the propagation speed of SSHA do not identify the correct input mode. This finding explains the lack of progress made in recent years in bridging the gap between the "too fast" Rossby wave phase speed observations by satellites and the phase speed in the highly accurate linear trapped wave theory.
Using simulated signal of sea surface height anomalies (SSHA) where the phase speed of the...