{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:18:46.349406", "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-Oct-25_to_2020-Oct-27_248.5_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": 2020100000750}, "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": "October 25 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 27 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 88632.19828476547}, "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": 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": 248.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "248.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 245.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 250.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-115.25, 43.0], [-115.03, 43.53], [-114.5, 43.75], [-114.25, 43.646], [-114.0, 43.75], [-113.75, 43.646], [-113.677, 43.677], [-113.53, 44.03], [-113.177, 44.177], [-113.03, 44.53], [-112.5, 44.75], [-112.25, 44.646], [-112.0, 44.75], [-111.75, 44.646], [-111.5, 44.75], [-111.25, 44.646], [-111.0, 44.75], [-110.75, 44.646], [-110.5, 44.75], [-109.97, 44.53], [-109.75, 44.0], [-109.854, 43.75], [-109.823, 43.677], [-109.47, 43.53], [-109.25, 43.0], [-109.47, 42.47], [-110.0, 42.25], [-110.25, 42.354], [-110.323, 42.323], [-110.354, 42.25], [-110.323, 42.177], [-109.97, 42.03], [-109.75, 41.5], [-109.97, 40.97], [-110.5, 40.75], [-110.75, 40.854], [-111.0, 40.75], [-111.25, 40.854], [-111.5, 40.75], [-111.75, 40.854], [-112.0, 40.75], [-112.25, 40.854], [-112.323, 40.823], [-112.47, 40.47], [-113.0, 40.25], [-113.25, 40.354], [-113.5, 40.25], [-114.03, 40.47], [-114.25, 41.0], [-114.146, 41.25], [-114.25, 41.5], [-114.125, 41.802], [-114.53, 41.97], [-114.677, 42.323], [-115.03, 42.47], [-115.25, 43.0]]]}}, "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": {"2020-10-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-114.67677669529664, 42.32322330470336], [-115.03033008588991, 42.46966991411009], [-115.25, 43.0], [-115.03033008588991, 43.53033008588991], [-114.5, 43.75], [-114.25, 43.64644660940672], [-114.0, 43.75], [-113.75, 43.64644660940672], [-113.67677669529664, 43.67677669529664], [-113.53033008588991, 44.03033008588991], [-113.17677669529664, 44.17677669529664], [-113.03033008588991, 44.53033008588991], [-112.5, 44.75], [-112.25, 44.64644660940672], [-112.0, 44.75], [-111.75, 44.64644660940672], [-111.5, 44.75], [-111.25, 44.64644660940672], [-111.0, 44.75], [-110.75, 44.64644660940672], [-110.5, 44.75], [-109.96966991411009, 44.53033008588991], [-109.75, 44.0], [-109.85355339059328, 43.75], [-109.82322330470336, 43.67677669529664], [-109.46966991411009, 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[-10.114515552937235, -18.64270043501088, -10.584593408901867]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.971728532213688, -12.497013665735409, -6.980501814273464]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.026244696024833, -17.197088226371193, -9.927153634850413]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0084334677544424, -2.93729241209352, -1.5637140078477563]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.905672780288799, -3.913372079502538, -2.172284579242146]}}