Antarctica Landfalling AR Catalog

The AR catalog presented here is based on ERA5 reanalysis data from 1979-2024. ARs are detected based on the Enhanced AR scale described in Zhang et al. 2024. The Enhanced AR scale includes three additional AR rankings (AR E1, E2, and E3) to account for climatologically lower water vapor transport in some regions. The Enhanced AR scale is determined based on the duration of AR conditions (IVT >100 kg m^-1 s^-1) and maximum IVT during the AR, the same methodology as described in Ralph et al. 2019, but with lower thresholds added. Changing selected location in menu will update all images and table at bottom of page. Click on table headers to sort based on selected data.

Top Left: Annual frequency of AR events shaded according to the Enhanced AR scale.

Top Right: Monthly average frequency of AR events shaded according to the Enhanced AR scale.

Bottom: “Radial” diagram of event-average IVT magnitude (distance from center) and event-average IVT direction (meteorological direction/quadrants) shaded by AR scale. Range rings start at 100 kg m^-1 s^-1 and include 200, 300 kg m^-1 s^-1 rings. Event-average direct is average of u component and v component.

Table: Dates and AR characteristics for all landfalling ARs, detected based on the Enhanced AR scale, for the selected location.