{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:13.609723", "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": "2011-Apr-29_to_2011-May-01_244.5_42.0"}, "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": 2011040001472}, "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": "April 29 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 01 2011"}, "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": 163227.18859728499}, "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": 42.0}, "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": 244.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "244.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 240.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 248.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.25, 38.5], [-120.03, 39.03], [-119.5, 39.25], [-119.25, 39.15], [-119.18, 39.18], [-119.15, 39.25], [-119.25, 39.5], [-119.15, 39.75], [-119.25, 40.0], [-119.15, 40.25], [-119.25, 40.5], [-119.12, 40.8], [-119.53, 40.97], [-119.75, 41.5], [-119.65, 41.75], [-119.75, 42.0], [-119.53, 42.53], [-119.0, 42.75], [-118.75, 42.65], [-118.5, 42.75], [-118.25, 42.65], [-118.18, 42.68], [-118.03, 43.03], [-117.5, 43.25], [-117.25, 43.15], [-117.18, 43.18], [-117.03, 43.53], [-116.5, 43.75], [-115.97, 43.53], [-115.82, 43.18], [-115.75, 43.15], [-115.5, 43.25], [-115.25, 43.15], [-115.0, 43.25], [-114.47, 43.03], [-114.32, 42.68], [-114.25, 42.65], [-114.0, 42.75], [-113.75, 42.65], [-113.5, 42.75], [-113.25, 42.65], [-113.18, 42.68], [-113.03, 43.03], [-112.5, 43.25], [-112.25, 43.15], [-112.0, 43.25], [-111.47, 43.03], [-111.25, 42.5], [-111.47, 41.97], [-111.82, 41.82], [-111.85, 41.75], [-111.75, 41.5], [-111.85, 41.25], [-111.75, 41.0], [-111.97, 40.47], [-112.5, 40.25], [-113.0, 40.46], [-113.5, 40.25], [-114.0, 40.46], [-114.32, 40.32], [-114.47, 39.97], [-114.82, 39.82], [-114.97, 39.47], [-115.5, 39.25], [-115.75, 39.35], [-116.0, 39.25], [-116.5, 39.46], [-116.87, 39.3], [-116.75, 39.0], [-116.97, 38.47], [-117.5, 38.25], [-117.75, 38.35], [-117.87, 38.3], [-117.75, 38.0], [-117.85, 37.75], [-117.75, 37.5], [-117.97, 36.97], [-118.5, 36.75], [-119.03, 36.97], [-119.18, 37.32], [-119.53, 37.47], [-119.68, 37.82], [-120.03, 37.97], [-120.25, 38.5]]]]}, "2011-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.25, 38.5], [-120.03, 39.03], [-119.5, 39.25], [-119.25, 39.15], [-119.18, 39.18], [-119.15, 39.25], [-119.25, 39.5], [-119.15, 39.75], [-119.25, 40.0], [-119.15, 40.25], [-119.25, 40.5], [-119.12, 40.8], [-119.53, 40.97], [-119.75, 41.5], [-119.65, 41.75], [-119.75, 42.0], [-119.53, 42.53], [-119.0, 42.75], [-118.75, 42.65], [-118.5, 42.75], [-118.25, 42.65], [-118.18, 42.68], [-118.03, 43.03], [-117.5, 43.25], [-117.25, 43.15], [-117.18, 43.18], [-117.03, 43.53], [-116.5, 43.75], 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3.207208411772399]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.1077182684807667, -4.2842227461899824, -3.221370564038068]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.336545480800071, -8.720484428424761, -6.648615187431151]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.180909038521122, -10.743046550065799, -9.596038622548576]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.670429948767511, -2.0157086612360677, -1.5476979772116908]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.096486335617761, -2.57098845128429, -2.272532182304549]}}