{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:31:00.021956", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2022-May-29_to_2022-May-31_243.5_43.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2022050001063}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "May 29 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 31 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 50279.39219777233}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 43.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 243.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "243.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 241.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 244.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.03, 43.03], [-118.5, 43.25], [-118.25, 43.15], [-118.0, 43.25], [-117.75, 43.15], [-117.68, 43.18], [-117.53, 43.53], [-117.18, 43.68], [-117.03, 44.03], [-116.68, 44.18], [-116.53, 44.53], [-116.0, 44.75], [-115.47, 44.53], [-115.32, 44.18], [-114.97, 44.03], [-114.75, 43.5], [-114.96, 43.0], [-114.75, 42.5], [-114.85, 42.25], [-114.75, 42.0], [-114.97, 41.47], [-115.32, 41.32], [-115.47, 40.97], [-116.0, 40.75], [-116.53, 40.97], [-116.68, 41.32], [-116.75, 41.35], [-116.82, 41.32], [-116.85, 41.25], [-116.75, 41.0], [-116.97, 40.47], [-117.5, 40.25], [-118.03, 40.47], [-118.18, 40.82], [-118.53, 40.97], [-118.68, 41.32], [-119.03, 41.47], [-119.25, 42.0], [-119.15, 42.25], [-119.25, 42.5], [-119.03, 43.03]]]]}, "2022-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.03, 43.03], [-118.5, 43.25], [-118.25, 43.15], [-118.0, 43.25], [-117.75, 43.15], [-117.68, 43.18], [-117.53, 43.53], [-117.18, 43.68], [-117.03, 44.03], [-116.68, 44.18], [-116.53, 44.53], [-116.0, 44.75], [-115.47, 44.53], [-115.32, 44.18], [-114.97, 44.03], [-114.75, 43.5], [-114.96, 43.0], [-114.75, 42.5], [-114.85, 42.25], [-114.75, 42.0], [-114.97, 41.47], [-115.32, 41.32], [-115.47, 40.97], [-116.0, 40.75], [-116.53, 40.97], [-116.68, 41.32], [-116.75, 41.35], [-116.82, 41.32], [-116.85, 41.25], [-116.75, 41.0], [-116.97, 40.47], [-117.5, 40.25], [-118.03, 40.47], [-118.18, 40.82], [-118.53, 40.97], [-118.68, 41.32], [-119.03, 41.47], [-119.25, 42.0], [-119.15, 42.25], [-119.25, 42.5], [-119.03, 43.03]]]]}, "2022-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.03, 43.03], [-118.5, 43.25], [-118.25, 43.15], [-118.0, 43.25], [-117.75, 43.15], [-117.68, 43.18], [-117.53, 43.53], [-117.18, 43.68], [-117.03, 44.03], [-116.68, 44.18], [-116.53, 44.53], [-116.0, 44.75], [-115.47, 44.53], [-115.32, 44.18], [-114.97, 44.03], [-114.75, 43.5], [-114.96, 43.0], [-114.75, 42.5], [-114.85, 42.25], [-114.75, 42.0], [-114.97, 41.47], [-115.32, 41.32], [-115.47, 40.97], [-116.0, 40.75], [-116.53, 40.97], [-116.68, 41.32], [-116.75, 41.35], [-116.82, 41.32], [-116.85, 41.25], [-116.75, 41.0], [-116.97, 40.47], [-117.5, 40.25], [-118.03, 40.47], [-118.18, 40.82], [-118.53, 40.97], [-118.68, 41.32], [-119.03, 41.47], [-119.25, 42.0], [-119.15, 42.25], [-119.25, 42.5], [-119.03, 43.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.833082355590136}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.809321898275627}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.77495006572741, 5.567719190854007, 7.375752495055508]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.848215666588544, 2.153697789310627, 3.980086557691209]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.728829895325695, -9.169209297959965, -7.5299265015412224]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.36358129482079, -10.833082355590136, -8.727747801920998]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.500197598405918, -2.0199963501635847, -1.6388188731640048]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5904423527815277, -2.422876835090323, -1.9108978808319732]}}