{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:29.433542", "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": "2019-Sep-17_to_2019-Sep-21_240.0_40.0"}, "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": 2019090000564}, "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": "September 17 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 21 2019"}, "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": 99509.72527680214}, "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": 40.0}, "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": 240.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "240.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 238.25}, "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": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.25, 40.0], [-122.03, 40.53], [-121.68, 40.68], [-121.53, 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38.32], [-121.53, 38.47], [-121.75, 39.0], [-121.65, 39.25], [-121.68, 39.32], [-122.03, 39.47], [-122.25, 40.0]]]]}, "2019-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.25, 40.0], [-122.03, 40.53], [-121.68, 40.68], [-121.53, 41.03], [-121.0, 41.25], [-120.75, 41.15], [-120.68, 41.18], [-120.53, 41.53], [-120.0, 41.75], [-119.75, 41.65], [-119.68, 41.68], [-119.53, 42.03], [-119.0, 42.25], [-118.47, 42.03], [-118.32, 41.68], [-117.97, 41.53], [-117.8, 41.13], [-117.5, 41.25], [-117.25, 41.15], [-117.18, 41.18], [-117.03, 41.53], [-116.5, 41.75], [-116.25, 41.65], [-116.18, 41.68], [-116.03, 42.03], [-115.5, 42.25], [-114.97, 42.03], [-114.75, 41.5], [-114.85, 41.25], [-114.75, 41.0], [-114.97, 40.47], [-115.32, 40.32], [-115.47, 39.97], [-116.0, 39.75], [-116.5, 39.96], [-116.82, 39.82], [-116.85, 39.75], [-116.75, 39.5], [-116.97, 38.97], [-117.32, 38.82], [-117.47, 38.47], [-117.82, 38.32], [-117.97, 37.97], [-118.5, 37.75], [-118.75, 37.85], [-119.0, 37.75], [-119.53, 37.97], [-119.7, 38.38], [-119.82, 38.32], [-119.85, 38.25], [-119.75, 38.0], [-119.97, 37.47], [-120.5, 37.25], [-121.03, 37.47], [-121.25, 38.0], [-121.15, 38.25], [-121.18, 38.32], [-121.53, 38.47], [-121.75, 39.0], [-121.65, 39.25], [-121.68, 39.32], [-122.03, 39.47], [-122.25, 40.0]]]]}, "2019-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.53, 41.03], [-121.0, 41.25], [-120.75, 41.15], [-120.68, 41.18], [-120.53, 41.53], [-120.0, 41.75], [-119.75, 41.65], [-119.68, 41.68], [-119.53, 42.03], [-119.0, 42.25], [-118.47, 42.03], [-118.32, 41.68], [-117.97, 41.53], [-117.8, 41.13], [-117.5, 41.25], [-117.25, 41.15], [-117.18, 41.18], [-117.03, 41.53], [-116.5, 41.75], [-116.25, 41.65], [-116.18, 41.68], [-116.03, 42.03], [-115.5, 42.25], [-114.97, 42.03], [-114.75, 41.5], [-114.85, 41.25], [-114.75, 41.0], [-114.97, 40.47], [-115.32, 40.32], [-115.47, 39.97], [-116.0, 39.75], [-116.5, 39.96], [-116.82, 39.82], [-116.85, 39.75], [-116.75, 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daily evolution of maximum t2m.", "value": [6.661313128890924, 8.195984094133848, 6.392385826696682, 5.570886905669738, 6.38273532542172]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.794451639547073, -4.978549721153213, -6.8799562477823315, -7.3494600702206885, -6.170476929995497]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.786420990235172, -5.593140114190987, -8.574016411116418, -8.571015493110167, -6.599731314107771]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.128691253057538, -1.5008957424303635, -1.8375082770720954, -1.8770665374490545, -1.5011280995705227]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2774049420603695, -1.6853271880372065, -2.2676897679904413, -2.1516698252861746, -1.6196801429143457]}}