{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:26:14.025099", "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": "2021-Jul-30_to_2021-Aug-02_246.0_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": 2021070001230}, "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": "July 30 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 02 2021"}, "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": 51772.662433637815}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 246.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "246.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 244.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 247.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-115.677, 37.677], [-115.53, 38.03], [-115.177, 38.177], [-115.03, 38.53], [-114.5, 38.75], [-114.25, 38.646], [-114.0, 38.75], [-113.75, 38.646], [-113.677, 38.677], [-113.53, 39.03], [-113.0, 39.25], [-112.47, 39.03], [-112.25, 38.5], [-112.354, 38.25], [-112.25, 38.0], [-112.47, 37.47], [-112.875, 37.302], [-112.823, 37.177], [-112.47, 37.03], [-112.25, 36.5], [-112.354, 36.25], [-112.25, 36.0], [-112.47, 35.47], [-113.0, 35.25], [-113.5, 35.457], [-114.0, 35.25], [-114.53, 35.47], [-114.677, 35.823], [-114.75, 35.854], [-115.0, 35.75], [-115.25, 35.854], [-115.5, 35.75], [-116.03, 35.97], [-116.25, 36.5], [-116.146, 36.75], [-116.25, 37.0], [-116.03, 37.53], [-115.677, 37.677]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-30T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-116.14644660940672, 36.75], [-116.25, 37.0], [-116.03033008588991, 37.53033008588991], 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anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.167812986899378}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8857636512805085}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.714930105492215, 24.093896328634685, 24.4999304436011, 21.02393085737674]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.07419223957413, 20.263837674783474, 20.162964354827068, 19.94224268780107]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8956335005071727, -4.1416252291176106, -3.638723570399983, -3.792569008431826]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.791149162253703, -5.167812986899378, -4.374244671892654, -4.683519405082279]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7350794904215234, -1.8010456575653355, -1.5604646119228507, -1.6416587881388978]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.974617222849842, -2.3149103508345603, -1.8776144311632625, -1.9028305971412058]}}