{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:43.101300", "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-Sep-28_to_2025-Oct-02_269.5_1.0"}, "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": 2025090000728}, "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": "September 28 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 02 2025"}, "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": 55628.57445487717}, "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": ["Ecuador"]}, "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": ["Pacific Ocean"]}, "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": 1.0}, "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": 269.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "269.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 268.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 0.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-89.32, 1.68], [-88.97, 1.53], [-88.75, 1.0], [-88.85, 0.75], [-88.75, 0.5], [-88.85, 0.25], [-88.75, 0.0], [-88.97, -0.53], [-89.5, -0.75], [-89.75, -0.65], [-90.0, -0.75], [-90.25, -0.65], [-90.5, -0.75], [-91.03, -0.53], [-91.18, -0.18], [-91.53, -0.03], [-91.68, 0.32], [-92.03, 0.47], [-92.25, 1.0], [-92.15, 1.25], [-92.25, 1.5], [-92.03, 2.03], [-91.68, 2.18], [-91.53, 2.53], [-91.0, 2.75], [-90.75, 2.65], [-90.5, 2.75], [-89.97, 2.53], [-89.82, 2.18], [-89.47, 2.03], [-89.32, 1.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.25, 0.5], [-91.14999999999998, 0.75], [-91.25, 1.0], [-91.14999999999998, 1.25], [-91.25, 1.5], [-91.02999999999997, 2.03], [-90.5, 2.25], [-90.25, 2.15], [-90.0, 2.25], [-89.47000000000003, 2.03], [-89.32, 1.68], [-88.97000000000003, 1.53], [-88.75, 1.0], [-88.85000000000002, 0.75], [-88.75, 0.5], [-88.85000000000002, 0.25], [-88.75, 0.0], [-88.97000000000003, -0.53], [-89.5, -0.75], [-89.75, -0.65], [-90.0, -0.75], [-90.25, -0.65], [-90.5, -0.75], [-91.02999999999997, -0.53], [-91.25, 0.0], [-91.14999999999998, 0.25], [-91.25, 0.5]]]]}, "2025-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.75, 1.0], [-91.64999999999998, 1.25], [-91.75, 1.5], [-91.64999999999998, 1.75], [-91.75, 2.0], [-91.52999999999997, 2.53], [-91.0, 2.75], [-90.75, 2.65], [-90.5, 2.75], [-89.97000000000003, 2.53], [-89.82, 2.18], [-89.47000000000003, 2.03], [-89.32, 1.68], [-88.97000000000003, 1.53], [-88.75, 1.0], [-88.85000000000002, 0.75], [-88.75, 0.5], [-88.85000000000002, 0.25], [-88.75, 0.0], [-88.97000000000003, -0.53], [-89.5, -0.75], [-89.75, -0.65], [-90.0, -0.75], [-90.25, -0.65], [-90.5, -0.75], [-91.02999999999997, -0.53], [-91.18, -0.18], [-91.52999999999997, -0.03], [-91.75, 0.5], [-91.64999999999998, 0.75], [-91.75, 1.0]]]]}, "2025-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 1.5], [-92.02999999999997, 2.03], [-91.68, 2.18], [-91.52999999999997, 2.53], [-91.0, 2.75], [-90.75, 2.65], [-90.5, 2.75], [-89.97000000000003, 2.53], [-89.82, 2.18], [-89.47000000000003, 2.03], [-89.32, 1.68], [-88.97000000000003, 1.53], [-88.75, 1.0], [-88.85000000000002, 0.75], [-88.75, 0.5], [-88.85000000000002, 0.25], [-88.75, 0.0], [-88.97000000000003, -0.53], [-89.5, -0.75], [-89.75, -0.65], [-90.0, -0.75], [-90.25, -0.65], [-90.5, -0.75], [-91.02999999999997, -0.53], [-91.18, -0.18], [-91.52999999999997, -0.03], [-91.68, 0.32], [-92.02999999999997, 0.47], [-92.25, 1.0], [-92.14999999999998, 1.25], [-92.25, 1.5]]]]}, "2025-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 1.5], [-92.02999999999997, 2.03], [-91.68, 2.18], [-91.52999999999997, 2.53], [-91.0, 2.75], [-90.75, 2.65], [-90.5, 2.75], [-89.97000000000003, 2.53], [-89.75, 2.0], [-89.85000000000002, 1.75], [-89.75, 1.5], [-89.85000000000002, 1.25], [-89.75, 1.0], [-89.85000000000002, 0.75], [-89.75, 0.5], [-89.85000000000002, 0.25], [-89.75, 0.0], [-89.97000000000003, -0.53], [-90.5, -0.75], [-91.02999999999997, -0.53], [-91.18, -0.18], [-91.52999999999997, -0.03], [-91.68, 0.32], [-92.02999999999997, 0.47], [-92.25, 1.0], [-92.14999999999998, 1.25], [-92.25, 1.5]]]]}, "2025-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 1.5], [-92.02999999999997, 2.03], [-91.68, 2.18], [-91.52999999999997, 2.53], [-91.0, 2.75], [-90.47000000000003, 2.53], [-90.32, 2.18], [-89.97000000000003, 2.03], [-89.75, 1.5], [-89.85000000000002, 1.25], [-89.75, 1.0], [-89.85000000000002, 0.75], [-89.75, 0.5], [-89.97000000000003, -0.03], [-90.5, -0.25], [-90.75, -0.15], [-91.0, -0.25], [-91.52999999999997, -0.03], [-91.68, 0.32], [-92.02999999999997, 0.47], [-92.25, 1.0], [-92.14999999999998, 1.25], [-92.25, 1.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.019045461507858}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.497962594970218}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.913564300537132, 20.898497517903593, 20.874758939389835, 21.161132142038014, 21.185560268825952]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.130117034912132, 19.85335184733077, 19.892644500732445, 20.190562184651696, 20.35138600667318]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4200999576139461, -1.6016522743494086, -1.5964085077762666, -1.3974376495082197, -1.3347628294618896]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.5479058264517107, -1.8700030708429836, -2.019045461507858, -1.6415248444866393, -1.548962178158149]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2400164374213225, -1.3879895382035707, -1.3557004911677377, -1.200128073601958, -1.131300947576213]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3017991507768445, -1.6377483762168856, -1.7355203680060423, -1.3983096547518368, -1.2376385963755892]}}