There is new information on circulation indices on the site: archive of the circulation indices forecast (SL-AV model) and archive of the atmospheric action centers morphometric characteristics in the Northern Hemisphere.
The circulation indices forecasts are calculated in the base the SL-AV model (Hydrometcenter of Russia) da. The archive covers 2024 and 2025 and contains data for the EA, WA, EU, WP, PNA, NAO, POL, SHI, and AOS indices.
The archive of the atmospheric action centers morphometric characteristics in the Northern Hemisphere contains sea-level pressure values and center coordinates for the Icelandic Low, Aleutian Low, Azores High, Hawaiian High, and Siberian High starting from January 2025.