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Equatorial Rossby Waves and TD-type disturbances are strongly affected by tropical cyclones, as shown in Fig. 6 from Schreck et al. (2011). Instead of appending with climatology as in Wheeler-Weickmann, the observations are instead padded with 45-day forecast anomalies from the CFS.
Welcome to the Equatorial Wave Identification Tool, designed to analyze operational global deterministic forecasts from IFS, ICON and GFS, alongside satellite rainfall data from GPM IMERG. This tool employs two distinct methods to isolate Equatorial Waves (EWs) and provides users with valuable insights into tropical dynamics. Figures feature ...
The operational global ocean analysis and forecast system of Météo-France with a resolution of 1/12 degree is providing daily analyses and 10 days forecasts for the global ocean sea surface waves. This product includes 3-hourly instantaneous fields of integrated wave parameters from the total spectrum (significant height, period, direction ...
Equatorial sea surface temperatures (SSTs) are near average across most of the Pacific Ocean. ENSO-Neutral is likely in the Northern Hemisphere summer 2025 (82% chance in June-August) and may continue into winter 2025-26, though confidence is lower (48% chance of Neutral and 41% chance of La Niña in November-January).
Global forecasts exhibit substantial skill (correlation > 0.6) in equatorial waves, to at least day 4 for Kelvin waves and day 6 for westward mixed Rossby–gravity (WMRG), and meridional mode number n = 1 and n = 2 Rossby waves. A local wave phase diagram is introduced that is useful to visualize and validate wave forecasts. It shows that in ...
The red outline shows the propagation of an equatorial Rossby wave, earlier than with the Velocity Potential hovmöller. It starts at 90°E on 23/09 and reaches West Africa on 20-28/10. Detecting and tracking this type of signal brings predictability to the situation and adds to the strong altitude divergence mentioned on the Velocity Potential ...
identifying equatorial waves in analyses and forecasts in real-time. Following the discovery of equatorial waves in the equatorial stratosphere (Yanai and Maruyama 1966; Wallace and Kousky 1968), the subsequent two decades of observational studies of equatorial waves in 1970-1990s mainly used time and/or space power spectral
In FORSEA and related projects a method has been developed to identify equatorial waves in real world data and forecasts (Yang et al., 2021) which can be used to examine the relationship between equatorial waves and heavy rainfall.
Our findings show that westward-moving equatorial waves can be useful medium-range precursors to TC activity. Tropical cyclones (TCs) are amongst the most destructive weather phenomena, causing...
This study presents an analysis and comparison of equatorial waves in the ERA5 reanalysis and GloSea5 forecasts, by projecting dynamical fields onto theoretical equatorial wave modes. The seasonal an...