{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:26.270589", "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": "2025-Jul-23_to_2025-Jul-25_303.5_60.5"}, "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": 2025070000908}, "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 23 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 25 2025"}, "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": 58937.06689260822}, "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": ["Labrador Sea"]}, "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": 60.5}, "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": 303.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 298.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 304.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-62.03, 61.53], [-61.68, 61.68], [-61.53, 62.03], [-61.0, 62.25], [-60.75, 62.15], [-60.5, 62.25], [-60.25, 62.15], [-60.0, 62.25], [-59.75, 62.15], [-59.5, 62.25], [-59.25, 62.15], [-59.0, 62.25], [-58.75, 62.15], [-58.5, 62.25], [-58.25, 62.15], [-58.0, 62.25], [-57.47, 62.03], [-57.32, 61.68], [-57.25, 61.65], [-57.0, 61.75], [-56.75, 61.65], [-56.5, 61.75], [-56.25, 61.65], [-56.0, 61.75], [-55.75, 61.65], [-55.5, 61.75], [-54.97, 61.53], [-54.75, 61.0], [-54.85, 60.75], [-54.75, 60.5], [-54.97, 59.97], [-55.5, 59.75], [-55.75, 59.85], [-55.82, 59.82], [-55.97, 59.47], [-56.5, 59.25], [-56.75, 59.35], [-56.82, 59.32], [-56.97, 58.97], [-57.5, 58.75], [-58.03, 58.97], [-58.18, 59.32], [-58.25, 59.35], [-58.5, 59.25], [-59.03, 59.47], [-59.18, 59.82], [-59.25, 59.85], [-59.5, 59.75], [-59.75, 59.85], [-60.0, 59.75], [-60.53, 59.97], [-60.68, 60.32], [-60.75, 60.35], [-60.82, 60.32], [-60.85, 60.25], [-60.75, 60.0], [-60.97, 59.47], [-61.5, 59.25], [-61.75, 59.35], [-62.0, 59.25], [-62.53, 59.47], [-62.75, 60.0], [-62.53, 60.53], [-62.18, 60.68], [-62.15, 60.75], [-62.25, 61.0], [-62.03, 61.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.14999999999998, 60.75], [-62.25, 61.0], [-62.02999999999997, 61.53], [-61.68000000000001, 61.68], [-61.52999999999997, 62.03], [-61.0, 62.25], [-60.75, 62.15], [-60.5, 62.25], [-60.25, 62.15], [-60.0, 62.25], [-59.75, 62.15], [-59.5, 62.25], [-59.25, 62.15], [-59.0, 62.25], [-58.75, 62.15], [-58.5, 62.25], [-58.25, 62.15], [-58.0, 62.25], [-57.47000000000003, 62.03], [-57.31999999999999, 61.68], [-57.25, 61.65], [-57.0, 61.75], [-56.75, 61.65], [-56.5, 61.75], [-56.25, 61.65], [-56.0, 61.75], [-55.75, 61.65], [-55.5, 61.75], [-54.97000000000003, 61.53], [-54.75, 61.0], [-54.85000000000002, 60.75], [-54.75, 60.5], [-54.97000000000003, 59.97], [-55.5, 59.75], [-55.75, 59.85], [-55.81999999999999, 59.82], [-55.97000000000003, 59.47], [-56.5, 59.25], [-56.75, 59.35], [-56.81999999999999, 59.32], [-56.97000000000003, 58.97], [-57.5, 58.75], [-58.02999999999997, 58.97], [-58.18000000000001, 59.32], [-58.25, 59.35], [-58.5, 59.25], [-59.02999999999997, 59.47], [-59.18000000000001, 59.82], [-59.25, 59.85], [-59.5, 59.75], [-59.75, 59.85], [-60.0, 59.75], [-60.52999999999997, 59.97], [-60.68000000000001, 60.32], [-60.75, 60.35], [-60.81999999999999, 60.32], [-60.85000000000002, 60.25], [-60.75, 60.0], [-60.97000000000003, 59.47], [-61.5, 59.25], [-61.75, 59.35], [-62.0, 59.25], [-62.52999999999997, 59.47], [-62.75, 60.0], [-62.52999999999997, 60.53], [-62.18000000000001, 60.68], [-62.14999999999998, 60.75]]]]}, "2025-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.14999999999998, 60.75], [-62.25, 61.0], [-62.02999999999997, 61.53], [-61.68000000000001, 61.68], [-61.52999999999997, 62.03], [-61.0, 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"description": "Mean t2m anomaly over entire duration", "value": -2.3143666337167392}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.307457713591816, 3.6999420035598973, 4.109942470452722]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.5154968261718977, 2.0350865681966184, 2.704512532552087]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0543243404860383, -2.650659342586638, -2.2381162180775416]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.5425601301924985, -3.270346428480252, -3.0293528242281695]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5291115830646247, -2.0248445401351356, -1.7439249307207785]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.757784493496873, -2.4263375183078697, -2.5120482157933677]}}