{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:44.620536", "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": "2024-Mar-04_to_2024-Mar-07_250.5_51.0"}, "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": 2024030000189}, "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": "March 04 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 07 2024"}, "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": 113348.91446242551}, "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": ["Canada"]}, "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": 51.0}, "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": 250.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "250.5\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": 252.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-114.25, 53.85], [-114.5, 53.75], [-114.75, 53.85], [-115.0, 53.75], [-115.25, 53.85], [-115.5, 53.75], [-116.03, 53.97], [-116.25, 54.5], [-116.03, 55.03], [-115.68, 55.18], [-115.53, 55.53], [-115.0, 55.75], [-114.47, 55.53], [-114.32, 55.18], [-114.25, 55.15], [-114.0, 55.25], [-113.75, 55.15], [-113.5, 55.25], [-113.25, 55.15], [-113.0, 55.25], [-112.75, 55.15], [-112.5, 55.25], [-111.97, 55.03], [-111.82, 54.68], [-111.7, 54.63], [-111.53, 55.03], [-111.0, 55.25], [-110.75, 55.15], [-110.5, 55.25], [-109.97, 55.03], [-109.82, 54.68], [-109.75, 54.65], [-109.5, 54.75], [-108.97, 54.53], [-108.82, 54.18], [-108.47, 54.03], [-108.32, 53.68], [-107.97, 53.53], [-107.75, 53.0], [-107.96, 52.5], [-107.82, 52.18], [-107.47, 52.03], [-107.25, 51.5], [-107.47, 50.97], [-108.0, 50.75], [-108.5, 50.96], [-108.82, 50.82], [-108.97, 50.47], [-109.5, 50.25], [-109.75, 50.35], [-110.0, 50.25], [-110.53, 50.47], [-110.68, 50.82], [-110.75, 50.85], [-111.0, 50.75], [-111.25, 50.85], [-111.5, 50.75], [-112.03, 50.97], [-112.25, 51.5], [-112.15, 51.75], [-112.18, 51.82], [-112.25, 51.85], [-112.5, 51.75], [-113.03, 51.97], [-113.18, 52.32], [-113.53, 52.47], [-113.68, 52.82], [-114.03, 52.97], [-114.25, 53.5], [-114.15, 53.75], [-114.18, 53.82], [-114.25, 53.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.53, 55.53], [-115.0, 55.75], [-114.47, 55.53], [-114.32, 55.18], [-114.25, 55.15], [-114.0, 55.25], [-113.75, 55.15], [-113.5, 55.25], [-113.25, 55.15], [-113.0, 55.25], [-112.75, 55.15], [-112.5, 55.25], [-111.97, 55.03], [-111.82, 54.68], [-111.47, 54.53], [-111.32, 54.18], [-110.97, 54.03], [-110.82, 53.68], [-110.47, 53.53], [-110.32, 53.18], [-109.97, 53.03], [-109.82, 52.68], [-109.75, 52.65], [-109.5, 52.75], [-109.25, 52.65], [-109.0, 52.75], [-108.47, 52.53], [-108.30000000000001, 52.13], 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evolution of mean t2m.", "value": [-22.044137299271625, -23.48344263503526, -22.41252003522962, -22.708799800642282]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-25.058940814987068, -26.856526298438183, -25.928043706385324, -25.04967641451637]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-12.86627434890248, -14.069471302070962, -13.318919244009397, -14.01379694547056]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-16.074866614061193, -16.453856448030677, -16.654418664201728, -17.26153179409917]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.546258520436629, -1.6866259260002703, -1.5769370329303853, -1.660106001878887]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9173243210870183, -1.9531055818991743, -1.988145821419753, -2.0401291798538286]}}