{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:46.850822", "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-May-17_to_2024-May-21_243.5_50.0"}, "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": 2024050000450}, "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": "May 17 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 21 2024"}, "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": 95868.92680749187}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 50.0}, "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": 243.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "243.5\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": 249.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-113.5, 46.25], [-114.0, 46.46], [-114.5, 46.25], [-115.03, 46.47], [-115.18, 46.82], [-115.25, 46.85], [-115.5, 46.75], 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[-110.75, 47.85], [-111.0, 47.75], [-111.25, 47.85], [-111.5, 47.75], [-111.75, 47.85], [-112.0, 47.75], [-112.3, 47.88], [-112.35, 47.75], [-112.25, 47.5], [-112.47, 46.97], [-112.82, 46.82], [-112.97, 46.47], [-113.5, 46.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.0, 50.75], [-114.47, 50.53], [-114.25, 50.0], [-114.47, 49.47], [-115.0, 49.25], [-115.53, 49.47], [-115.75, 50.0], [-115.53, 50.53], [-115.0, 50.75]]], [[[-118.03, 50.47], [-118.25, 51.0], [-118.03, 51.53], [-117.5, 51.75], [-117.25, 51.65], [-117.0, 51.75], [-116.47, 51.53], [-116.32, 51.18], [-115.97, 51.03], [-115.75, 50.5], [-115.85, 50.25], [-115.75, 50.0], [-115.97, 49.47], [-116.5, 49.25], [-117.03, 49.47], [-117.25, 50.0], [-117.15, 50.25], [-117.18, 50.32], [-117.25, 50.35], [-117.5, 50.25], [-118.03, 50.47]]]]}, "2024-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.75, 49.0], [-117.53, 49.53], [-117.18, 49.68], [-117.15, 49.75], [-117.25, 50.0], [-117.15, 50.25], [-117.18, 50.32], [-117.25, 50.35], [-117.5, 50.25], [-118.03, 50.47], [-118.25, 51.0], [-118.03, 51.53], [-117.5, 51.75], [-117.25, 51.65], [-117.0, 51.75], [-116.47, 51.53], [-116.32, 51.18], [-115.97, 51.03], [-115.75, 50.5], [-115.85, 50.25], [-115.82, 50.18], [-115.69999999999999, 50.13], [-115.53, 50.53], [-115.0, 50.75], [-114.75, 50.65], [-114.5, 50.75], [-113.97, 50.53], [-113.75, 50.0], [-113.85, 49.75], [-113.82, 49.68], [-113.5, 49.54], [-113.0, 49.75], [-112.75, 49.65], [-112.5, 49.75], [-112.25, 49.65], [-112.0, 49.75], [-111.75, 49.65], [-111.5, 49.75], [-111.25, 49.65], [-111.0, 49.75], [-110.75, 49.65], [-110.5, 49.75], [-109.97, 49.53], [-109.75, 49.0], [-109.85, 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"evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.44708828493219244, -0.8650422555343198, -0.29979315127866357, 0.19148607732375922, 5.740515986612763]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5537390024484012, -4.923407119024222, -5.230968095306631, -5.183863427440386, -4.277894336471377]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.9832189859799314, -5.875183203990616, -6.363135268463793, -6.352349744253047, -4.277894336471377]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.292227827439678, -1.434652444381126, -1.4844712623674665, -1.4435623180866162, -1.2276042545656667]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4536971268283685, -2.0022102731187963, -1.893009417407829, -1.8760133679060846, -1.2276042545656667]}}