{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:22.562630", "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-21_to_2024-Apr-23_260.5_27.0"}, "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": 2024040000454}, "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 21 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2024"}, "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": 95874.78480092737}, "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": ["Mexico", "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": 27.0}, "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": 260.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 262.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-101.5, 28.25], [-101.25, 28.15], [-101.0, 28.25], [-100.75, 28.15], [-100.5, 28.25], [-100.25, 28.15], [-100.18, 28.18], [-100.15, 28.25], [-100.25, 28.5], [-100.03, 29.03], [-99.68, 29.18], [-99.53, 29.53], [-99.18, 29.68], [-99.03, 30.03], [-98.68, 30.18], [-98.53, 30.53], [-98.0, 30.75], [-97.47, 30.53], [-97.25, 30.0], [-97.46, 29.5], [-97.25, 29.0], [-97.35, 28.75], [-97.25, 28.5], [-97.35, 28.25], [-97.25, 28.0], [-97.35, 27.75], [-97.25, 27.5], [-97.35, 27.25], [-97.25, 27.0], [-97.47, 26.47], [-97.82, 26.32], [-97.97, 25.97], [-98.5, 25.75], [-98.75, 25.85], [-99.0, 25.75], [-99.25, 25.85], [-99.32, 25.82], [-99.47, 25.47], [-100.0, 25.25], [-100.5, 25.46], [-101.0, 25.25], [-101.53, 25.47], [-101.75, 26.0], [-101.65, 26.25], [-101.68, 26.32], [-102.03, 26.47], [-102.25, 27.0], [-102.15, 27.25], [-102.25, 27.5], [-102.03, 28.03], [-101.5, 28.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.25, 27.5], [-102.02999999999997, 28.03], [-101.5, 28.25], [-101.25, 28.15], [-101.0, 28.25], [-100.75, 28.15], [-100.5, 28.25], [-100.25, 28.15], [-100.18, 28.18], [-100.14999999999998, 28.25], [-100.25, 28.5], [-100.02999999999997, 29.03], [-99.68, 29.18], [-99.52999999999997, 29.53], [-99.18, 29.68], [-99.02999999999997, 30.03], [-98.68, 30.18], [-98.52999999999997, 30.53], [-98.0, 30.75], [-97.47000000000003, 30.53], [-97.25, 30.0], [-97.45999999999998, 29.5], [-97.25, 29.0], [-97.35000000000002, 28.75], [-97.25, 28.5], [-97.35000000000002, 28.25], [-97.25, 28.0], [-97.35000000000002, 27.75], [-97.25, 27.5], [-97.35000000000002, 27.25], [-97.25, 27.0], [-97.47000000000003, 26.47], [-97.82, 26.32], [-97.97000000000003, 25.97], [-98.5, 25.75], [-98.75, 25.85], [-99.0, 25.75], [-99.25, 25.85], [-99.32, 25.82], [-99.47000000000003, 25.47], [-100.0, 25.25], [-100.5, 25.46], [-101.0, 25.25], [-101.52999999999997, 25.47], [-101.75, 26.0], [-101.64999999999998, 26.25], [-101.68, 26.32], [-102.02999999999997, 26.47], [-102.25, 27.0], [-102.14999999999998, 27.25], [-102.25, 27.5]]]]}, "2024-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.25, 27.5], [-102.02999999999997, 28.03], [-101.5, 28.25], [-101.25, 28.15], [-101.0, 28.25], [-100.75, 28.15], [-100.5, 28.25], [-100.25, 28.15], [-100.18, 28.18], [-100.14999999999998, 28.25], [-100.25, 28.5], [-100.02999999999997, 29.03], [-99.68, 29.18], [-99.52999999999997, 29.53], [-99.18, 29.68], [-99.02999999999997, 30.03], [-98.68, 30.18], [-98.52999999999997, 30.53], [-98.0, 30.75], [-97.47000000000003, 30.53], [-97.25, 30.0], [-97.45999999999998, 29.5], [-97.25, 29.0], [-97.35000000000002, 28.75], [-97.25, 28.5], [-97.35000000000002, 28.25], [-97.25, 28.0], [-97.35000000000002, 27.75], [-97.25, 27.5], [-97.35000000000002, 27.25], [-97.25, 27.0], [-97.47000000000003, 26.47], [-97.82, 26.32], [-97.97000000000003, 25.97], [-98.5, 25.75], [-98.75, 25.85], [-99.0, 25.75], [-99.25, 25.85], [-99.32, 25.82], [-99.47000000000003, 25.47], [-100.0, 25.25], [-100.5, 25.46], [-101.0, 25.25], [-101.52999999999997, 25.47], [-101.75, 26.0], [-101.64999999999998, 26.25], [-101.68, 26.32], [-102.02999999999997, 26.47], [-102.25, 27.0], [-102.14999999999998, 27.25], [-102.25, 27.5]]]]}, "2024-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.25, 27.5], [-102.02999999999997, 28.03], [-101.5, 28.25], [-101.25, 28.15], [-101.0, 28.25], [-100.75, 28.15], [-100.5, 28.25], [-100.25, 28.15], [-100.18, 28.18], [-100.14999999999998, 28.25], [-100.25, 28.5], [-100.02999999999997, 29.03], [-99.68, 29.18], [-99.52999999999997, 29.53], [-99.18, 29.68], [-99.02999999999997, 30.03], [-98.68, 30.18], [-98.52999999999997, 30.53], [-98.0, 30.75], [-97.47000000000003, 30.53], [-97.25, 30.0], [-97.45999999999998, 29.5], [-97.25, 29.0], [-97.35000000000002, 28.75], [-97.25, 28.5], [-97.35000000000002, 28.25], [-97.25, 28.0], [-97.35000000000002, 27.75], [-97.25, 27.5], [-97.35000000000002, 27.25], [-97.25, 27.0], [-97.47000000000003, 26.47], [-97.82, 26.32], [-97.97000000000003, 25.97], [-98.5, 25.75], [-98.75, 25.85], [-99.0, 25.75], [-99.25, 25.85], [-99.32, 25.82], [-99.47000000000003, 25.47], [-100.0, 25.25], [-100.5, 25.46], [-101.0, 25.25], [-101.52999999999997, 25.47], [-101.75, 26.0], [-101.64999999999998, 26.25], [-101.68, 26.32], [-102.02999999999997, 26.47], [-102.25, 27.0], [-102.14999999999998, 27.25], [-102.25, 27.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.37639879444788}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.320122812738468}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.493077801476772, 17.10958989799275, 20.35106342215164]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.150769663816789, 13.739137013687412, 17.33493208306072]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.285955802228837, -7.8812501998542075, -4.7931624361323575]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.610027352572558, -10.37639879444788, -6.89988171702106]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1564016675815316, -2.648059668853096, -1.5749636865425933]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.6690584424879975, -3.176094495238006, -1.9621230807950734]}}