{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:20:17.664831", "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": "2020-Jun-14_to_2020-Jun-17_243.0_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": 2020060000456}, "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": "June 14 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 17 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 93674.70320854112}, "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": 243.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "243.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 239.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 245.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.75, 48.5], [-120.53, 49.03], [-120.0, 49.25], [-119.47, 49.03], [-119.32, 48.68], [-119.25, 48.65], [-119.18, 48.68], [-119.03, 49.03], [-118.5, 49.25], [-118.25, 49.15], [-118.0, 49.25], [-117.47, 49.03], [-117.32, 48.68], [-116.97, 48.53], [-116.82, 48.18], [-116.75, 48.15], [-116.5, 48.25], [-115.97, 48.03], [-115.82, 47.68], [-115.47, 47.53], [-115.32, 47.18], [-115.25, 47.15], [-115.0, 47.25], [-114.47, 47.03], [-114.25, 46.5], [-114.35, 46.25], [-114.25, 46.0], [-114.47, 45.47], [-115.0, 45.25], [-115.25, 45.35], [-115.32, 45.32], [-115.47, 44.97], [-115.82, 44.82], [-115.85, 44.75], [-115.82, 44.68], [-115.47, 44.53], [-115.25, 44.0], [-115.47, 43.47], [-116.0, 43.25], [-116.25, 43.35], [-116.32, 43.32], [-116.47, 42.97], [-117.0, 42.75], [-117.53, 42.97], [-117.75, 43.5], [-117.65, 43.75], [-117.75, 44.0], [-117.65, 44.25], [-117.75, 44.5], [-117.62, 44.8], [-118.03, 44.97], [-118.25, 45.5], [-118.15, 45.75], [-118.25, 46.0], [-118.15, 46.25], [-118.18, 46.32], [-118.25, 46.35], [-118.5, 46.25], [-119.03, 46.47], [-119.18, 46.82], [-119.53, 46.97], [-119.68, 47.32], [-120.03, 47.47], [-120.18, 47.82], [-120.53, 47.97], [-120.75, 48.5]]]]}, "2020-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.75, 48.5], [-120.53, 49.03], [-120.0, 49.25], [-119.47, 49.03], [-119.32, 48.68], [-119.25, 48.65], [-119.18, 48.68], [-119.03, 49.03], [-118.5, 49.25], [-118.25, 49.15], [-118.0, 49.25], [-117.47, 49.03], [-117.32, 48.68], [-116.97, 48.53], [-116.82, 48.18], [-116.75, 48.15], [-116.5, 48.25], [-115.97, 48.03], [-115.82, 47.68], [-115.47, 47.53], [-115.32, 47.18], [-115.25, 47.15], [-115.0, 47.25], [-114.47, 47.03], [-114.25, 46.5], [-114.35, 46.25], [-114.25, 46.0], [-114.47, 45.47], [-114.82, 45.32], [-114.97, 44.97], [-115.32, 44.82], [-115.46, 44.5], [-115.25, 44.0], [-115.47, 43.47], [-116.0, 43.25], [-116.25, 43.35], [-116.32, 43.32], [-116.47, 42.97], [-117.0, 42.75], [-117.53, 42.97], [-117.75, 43.5], [-117.65, 43.75], [-117.75, 44.0], [-117.65, 44.25], [-117.75, 44.5], [-117.62, 44.8], [-118.03, 44.97], [-118.25, 45.5], [-118.15, 45.75], [-118.25, 46.0], [-118.15, 46.25], [-118.18, 46.32], [-118.25, 46.35], [-118.5, 46.25], [-119.03, 46.47], [-119.18, 46.82], [-119.53, 46.97], [-119.68, 47.32], [-120.03, 47.47], [-120.18, 47.82], [-120.53, 47.97], [-120.75, 48.5]]]]}, "2020-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.75, 48.5], [-120.53, 49.03], [-120.0, 49.25], [-119.47, 49.03], [-119.32, 48.68], [-119.25, 48.65], [-119.18, 48.68], [-119.03, 49.03], [-118.5, 49.25], [-118.25, 49.15], [-118.0, 49.25], [-117.47, 49.03], [-117.32, 48.68], [-116.97, 48.53], [-116.82, 48.18], [-116.75, 48.15], [-116.5, 48.25], [-115.97, 48.03], [-115.82, 47.68], [-115.47, 47.53], [-115.32, 47.18], [-115.25, 47.15], [-115.0, 47.25], [-114.47, 47.03], [-114.25, 46.5], [-114.35, 46.25], [-114.25, 46.0], [-114.47, 45.47], [-114.82, 45.32], [-114.97, 44.97], [-115.32, 44.82], [-115.46, 44.5], [-115.25, 44.0], [-115.47, 43.47], [-116.0, 43.25], [-116.25, 43.35], 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{"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.4089254143335666}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.630581532461513}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.811633194322383, 9.630830813707973, 10.239384720567898, 10.032923062403881]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.416968898433538, 3.8955724345299814, 4.701477030826823, 4.997930469204164]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.626445311661722, -5.782857121541656, -5.37207181359012, -6.32315624451959]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.768287928941845, -7.081514093682529, -7.395182189150944, -7.4089254143335666]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5247109657740325, -1.6029352320755719, -1.5190536578160285, -1.706325829685586]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7668370567839056, -1.822202030060672, -1.8505123797286476, -2.0250670703533076]}}