{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:06:12.385548", "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": "2016-Sep-02_to_2016-Sep-06_244.5_30.0"}, "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": 2016090000128}, "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 02 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 06 2016"}, "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": 63012.11042837586}, "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": ["Mexico", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-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": ["North Pacific Ocean"]}, "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": 30.0}, "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": 242.75}, "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": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.75, 30.5], [-116.53, 31.03], [-116.0, 31.25], [-115.47, 31.03], [-115.32, 30.68], [-114.97, 30.53], [-114.75, 30.0], [-114.97, 29.47], [-115.5, 29.25], [-116.03, 29.47], [-116.18, 29.82], [-116.53, 29.97], [-116.75, 30.5]]]]}, "2016-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.53, 33.53], [-117.0, 33.75], [-116.47, 33.53], [-116.32, 33.18], [-115.97, 33.03], [-115.75, 32.5], [-115.85, 32.25], [-115.82, 32.18], [-115.47, 32.03], [-115.25, 31.5], [-115.35, 31.25], [-115.32, 31.18], [-114.97, 31.03], [-114.82, 30.68], [-114.47, 30.53], [-114.25, 30.0], [-114.35, 29.75], [-114.25, 29.5], [-114.47, 28.97], [-115.0, 28.75], [-115.25, 28.85], [-115.5, 28.75], [-116.03, 28.97], [-116.25, 29.5], [-116.15, 29.75], [-116.18, 29.82], [-116.53, 29.97], [-116.75, 30.5], [-116.65, 30.75], [-116.68, 30.82], [-117.03, 30.97], [-117.25, 31.5], [-117.15, 31.75], [-117.18, 31.82], [-117.53, 31.97], [-117.75, 32.5], [-117.65, 32.75], [-117.75, 33.0], [-117.53, 33.53]]]]}, "2016-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.65, 33.25], [-117.75, 33.5], [-117.53, 34.03], [-117.0, 34.25], [-116.75, 34.15], [-116.5, 34.25], [-116.25, 34.15], [-116.0, 34.25], [-115.47, 34.03], [-115.3, 33.63], [-115.0, 33.75], [-114.47, 33.53], [-114.25, 33.0], [-114.47, 32.47], [-114.82, 32.32], [-114.85, 32.25], [-114.75, 32.0], [-114.85, 31.75], [-114.75, 31.5], [-114.96, 31.0], [-114.82, 30.68], [-114.47, 30.53], [-114.25, 30.0], [-114.35, 29.75], [-114.25, 29.5], [-114.47, 28.97], [-115.0, 28.75], [-115.25, 28.85], [-115.5, 28.75], [-116.03, 28.97], [-116.25, 29.5], [-116.15, 29.75], [-116.18, 29.82], [-116.53, 29.97], [-116.75, 30.5], [-116.65, 30.75], [-116.68, 30.82], [-117.03, 30.97], [-117.25, 31.5], [-117.15, 31.75], [-117.18, 31.82], [-117.53, 31.97], [-117.75, 32.5], [-117.65, 32.75], [-117.75, 33.0], [-117.65, 33.25]]]]}, "2016-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.65, 33.25], [-117.75, 33.5], [-117.53, 34.03], [-117.0, 34.25], [-116.75, 34.15], [-116.5, 34.25], [-116.25, 34.15], [-116.0, 34.25], [-115.47, 34.03], [-115.3, 33.63], [-115.0, 33.75], [-114.47, 33.53], [-114.25, 33.0], [-114.47, 32.47], [-114.82, 32.32], [-114.85, 32.25], [-114.75, 32.0], [-114.85, 31.75], [-114.75, 31.5], [-114.96, 31.0], [-114.82, 30.68], [-114.47, 30.53], [-114.25, 30.0], [-114.35, 29.75], [-114.25, 29.5], [-114.47, 28.97], [-115.0, 28.75], [-115.25, 28.85], [-115.5, 28.75], [-116.03, 28.97], [-116.25, 29.5], [-116.15, 29.75], [-116.25, 30.0], [-116.15, 30.25], [-116.18, 30.32], [-116.53, 30.47], [-116.68, 30.82], [-117.03, 30.97], [-117.25, 31.5], [-117.15, 31.75], [-117.18, 31.82], [-117.53, 31.97], [-117.75, 32.5], [-117.65, 32.75], [-117.75, 33.0], [-117.65, 33.25]]]]}, "2016-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.75, 33.5], [-117.53, 34.03], [-117.0, 34.25], [-116.75, 34.15], [-116.5, 34.25], [-116.25, 34.15], [-116.0, 34.25], [-115.47, 34.03], [-115.3, 33.63], [-115.0, 33.75], [-114.47, 33.53], [-114.25, 33.0], [-114.47, 32.47], [-114.82, 32.32], [-114.85, 32.25], [-114.75, 32.0], [-114.85, 31.75], [-114.75, 31.5], [-114.96, 31.0], [-114.82, 30.68], [-114.47, 30.53], [-114.25, 30.0], [-114.35, 29.75], [-114.25, 29.5], [-114.47, 28.97], [-115.0, 28.75], [-115.25, 28.85], [-115.5, 28.75], [-116.03, 28.97], [-116.25, 29.5], [-116.15, 29.75], [-116.25, 30.0], [-116.15, 30.25], [-116.18, 30.32], [-116.53, 30.47], [-116.68, 30.82], [-117.03, 30.97], [-117.25, 31.5], [-117.15, 31.75], [-117.25, 32.0], [-117.15, 32.25], [-117.25, 32.5], [-117.15, 32.75], [-117.18, 32.82], [-117.53, 32.97], [-117.75, 33.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.524288754373913}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.325796452240861}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.004301004978913, 19.94152886742961, 21.495304185888074, 21.43629428877631, 22.18728165864917]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.608645056295757, 18.058877925864977, 17.47321205430802, 17.258893203403545, 17.75282727107151]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0777670907186234, -3.829871451155152, -4.568619525479943, -4.673328139917181, -4.093515555234451]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.060102462358202, -4.993481190848286, -6.524288754373913, -6.523941667462111, -5.2338174839229055]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3713835088165642, -1.5682303069769452, -1.8906899243102113, -1.976421445108761, -1.7413306863173272]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5033310476424002, -1.778405681416422, -2.3218297596145194, -2.7921649889347644, -2.1343533373738586]}}