{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:39.437608", "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": "2010-May-11_to_2010-May-15_249.0_38.0"}, "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": 2010050000361}, "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 11 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 15 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 142312.26373013307}, "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": 38.0}, "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": 249.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "249.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 244.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 249.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.15, 38.75], [-116.25, 39.0], [-116.15, 39.25], [-116.25, 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[-116.15, 38.25], [-116.25, 38.5], [-116.15, 38.75]]]]}, "2010-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.15, 38.75], [-116.25, 39.0], [-116.15, 39.25], [-116.25, 39.5], [-116.15, 39.75], [-116.25, 40.0], [-116.15, 40.25], [-116.25, 40.5], [-116.03, 41.03], [-115.68, 41.18], [-115.53, 41.53], [-115.0, 41.75], [-114.47, 41.53], [-114.32, 41.18], [-114.25, 41.15], [-114.0, 41.25], [-113.75, 41.15], [-113.5, 41.25], [-112.97, 41.03], [-112.82, 40.68], [-112.47, 40.53], [-112.32, 40.18], [-112.25, 40.15], [-112.0, 40.25], [-111.47, 40.03], [-111.25, 39.5], [-111.35, 39.25], [-111.32, 39.18], [-111.25, 39.15], [-111.0, 39.25], [-110.47, 39.03], [-110.32, 38.68], [-109.97, 38.53], [-109.75, 38.0], [-109.97, 37.47], [-110.5, 37.25], [-110.75, 37.35], [-110.82, 37.32], [-110.97, 36.97], [-111.5, 36.75], [-112.0, 36.96], [-112.37, 36.8], [-112.25, 36.5], [-112.35, 36.25], [-112.25, 36.0], [-112.47, 35.47], [-113.0, 35.25], [-113.53, 35.47], [-113.68, 35.82], 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entire duration", "value": -8.18559456042952}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.38182091368094, 5.269954701878817, 5.876289216447219, 6.133424759567163, 9.274973442272483]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.7655525875501894, 0.38148757562561286, -0.9077087717805057, 2.292338702092934, 3.2130402407607335]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.119016157543344, -8.5540844062332, -8.41579484712409, -7.145484773553643, -6.752730641661662]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.196587273929936, -11.15359531627746, -12.426077769395818, -8.589678619641063, -7.599929967147375]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7137781489202695, -1.8322197414426404, -1.8070441854034214, -1.5922321080689548, -1.6906795162443125]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9719363948471096, -2.1280670702572517, -2.3937953214709298, -1.857406741055859, -1.9035840636430883]}}