{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:26.944599", "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-Apr-30_to_2024-May-03_246.5_45.5"}, "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": 2024040000695}, "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": "April 30 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 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": 79034.28386168262}, "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": 45.5}, "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": 246.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "246.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 242.5}, "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": 43.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-117.5, 44.75], [-117.25, 44.65], [-117.12, 44.7], [-117.18, 44.82], [-117.53, 44.97], [-117.75, 45.5], [-117.53, 46.03], [-117.0, 46.25], [-116.47, 46.03], [-116.32, 45.68], [-116.25, 45.65], [-116.18, 45.68], [-116.03, 46.03], [-115.68, 46.18], [-115.65, 46.25], [-115.75, 46.5], [-115.53, 47.03], [-115.0, 47.25], [-114.75, 47.15], [-114.5, 47.25], [-114.0, 47.04], [-113.5, 47.25], [-112.97, 47.03], [-112.82, 46.68], [-112.47, 46.53], [-112.25, 46.0], [-112.47, 45.47], [-112.82, 45.32], [-112.97, 44.97], [-113.5, 44.75], [-113.75, 44.85], [-113.82, 44.82], [-113.96, 44.5], [-113.82, 44.18], [-113.47, 44.03], [-113.25, 43.5], [-113.47, 42.97], [-114.0, 42.75], [-114.25, 42.85], [-114.5, 42.75], [-114.75, 42.85], [-115.0, 42.75], [-115.25, 42.85], [-115.32, 42.82], [-115.47, 42.47], [-116.0, 42.25], [-116.25, 42.35], [-116.5, 42.25], [-117.03, 42.47], [-117.18, 42.82], [-117.53, 42.97], [-117.68, 43.32], [-118.03, 43.47], [-118.25, 44.0], [-118.03, 44.53], [-117.5, 44.75]]]]}}, "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": {"2024-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.03, 43.47], [-118.25, 44.0], [-118.03, 44.53], [-117.5, 44.75], [-117.25, 44.65], [-117.12, 44.7], [-117.18, 44.82], [-117.53, 44.97], [-117.75, 45.5], [-117.53, 46.03], [-117.0, 46.25], [-116.47, 46.03], [-116.32, 45.68], [-116.25, 45.65], [-116.18, 45.68], [-116.03, 46.03], [-115.68, 46.18], [-115.65, 46.25], [-115.75, 46.5], [-115.53, 47.03], [-115.0, 47.25], [-114.75, 47.15], [-114.5, 47.25], [-114.0, 47.04], [-113.5, 47.25], [-112.97, 47.03], [-112.82, 46.68], [-112.47, 46.53], [-112.25, 46.0], [-112.47, 45.47], [-112.82, 45.32], [-112.97, 44.97], [-113.5, 44.75], [-113.75, 44.85], [-113.82, 44.82], [-113.96000000000001, 44.5], [-113.82, 44.18], [-113.47, 44.03], [-113.25, 43.5], [-113.47, 42.97], [-114.0, 42.75], [-114.25, 42.85], [-114.5, 42.75], [-114.75, 42.85], [-115.0, 42.75], [-115.25, 42.85], [-115.32, 42.82], [-115.47, 42.47], [-116.0, 42.25], [-116.25, 42.35], [-116.5, 42.25], [-117.03, 42.47], [-117.18, 42.82], [-117.53, 42.97], [-117.68, 43.32], [-118.03, 43.47]]]]}, "2024-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.03, 43.47], [-118.25, 44.0], [-118.03, 44.53], [-117.5, 44.75], [-117.25, 44.65], [-117.12, 44.7], [-117.18, 44.82], [-117.53, 44.97], [-117.75, 45.5], [-117.53, 46.03], [-117.0, 46.25], [-116.47, 46.03], [-116.32, 45.68], [-116.25, 45.65], [-116.18, 45.68], [-116.03, 46.03], [-115.68, 46.18], [-115.65, 46.25], [-115.75, 46.5], [-115.53, 47.03], [-115.0, 47.25], [-114.75, 47.15], [-114.5, 47.25], [-114.0, 47.04], [-113.5, 47.25], [-112.97, 47.03], [-112.82, 46.68], [-112.47, 46.53], [-112.25, 46.0], [-112.47, 45.47], [-112.82, 45.32], [-112.97, 44.97], [-113.5, 44.75], [-113.75, 44.85], [-113.82, 44.82], [-113.96000000000001, 44.5], [-113.82, 44.18], [-113.47, 44.03], [-113.25, 43.5], [-113.47, 42.97], [-114.0, 42.75], [-114.25, 42.85], [-114.5, 42.75], [-114.75, 42.85], [-115.0, 42.75], [-115.25, 42.85], [-115.32, 42.82], [-115.47, 42.47], [-116.0, 42.25], [-116.25, 42.35], [-116.5, 42.25], [-117.03, 42.47], [-117.18, 42.82], [-117.53, 42.97], [-117.68, 43.32], [-118.03, 43.47]]]]}, "2024-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.03, 43.47], [-118.25, 44.0], [-118.03, 44.53], [-117.5, 44.75], [-117.25, 44.65], [-117.12, 44.7], [-117.18, 44.82], [-117.53, 44.97], [-117.75, 45.5], [-117.53, 46.03], [-117.0, 46.25], [-116.47, 46.03], [-116.32, 45.68], [-116.25, 45.65], [-116.18, 45.68], [-116.03, 46.03], [-115.68, 46.18], [-115.65, 46.25], [-115.75, 46.5], [-115.53, 47.03], [-115.0, 47.25], [-114.75, 47.15], [-114.5, 47.25], [-114.0, 47.04], [-113.5, 47.25], [-112.97, 47.03], [-112.82, 46.68], [-112.47, 46.53], [-112.25, 46.0], [-112.47, 45.47], [-112.82, 45.32], [-112.97, 44.97], [-113.5, 44.75], [-113.75, 44.85], [-113.82, 44.82], 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t2m.", "value": [-0.36797391199849017, -0.5722694518870526, 0.18532639753078683, -2.788742485754767]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.171686078900564, -6.54702455570299, -5.796447876281775, -2.788742485754767]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.314958153672559, -5.743987334568004, -5.30096647037201, -4.904524539898944]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.220876549378659, -6.955217002062625, -7.539185810277104, -4.904524539898944]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6470066584217204, -1.7446459132346581, -1.5904813869339216, -1.450537778625222]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0441846930061067, -2.1371480264153226, -2.014333017964419, -1.450537778625222]}}