{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:59.688923", "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-May-09_to_2025-May-11_257.0_28.5"}, "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": 2025050000237}, "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 09 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 11 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": 113156.41687376745}, "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"]}, "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": 28.5}, "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": 257.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "257.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 254.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 28.53], [-105.5, 28.75], [-105.25, 28.65], [-105.0, 28.75], [-104.75, 28.65], [-104.5, 28.75], [-104.25, 28.65], [-104.0, 28.75], [-103.75, 28.65], [-103.68, 28.68], [-103.53, 29.03], [-103.18, 29.18], [-103.03, 29.53], [-102.5, 29.75], [-101.97, 29.53], [-101.75, 29.0], [-101.85, 28.75], [-101.75, 28.5], [-101.85, 28.25], [-101.75, 28.0], [-101.96, 27.5], [-101.75, 27.0], [-101.85, 26.75], [-101.82, 26.68], [-101.47, 26.53], [-101.32, 26.18], [-101.25, 26.15], [-101.0, 26.25], [-100.47, 26.03], [-100.25, 25.5], [-100.47, 24.97], [-101.0, 24.75], [-101.25, 24.85], [-101.5, 24.75], [-101.75, 24.85], [-101.82, 24.82], [-101.97, 24.47], [-102.5, 24.25], [-102.75, 24.35], [-103.0, 24.25], [-103.25, 24.35], [-103.5, 24.25], [-104.03, 24.47], [-104.18, 24.82], [-104.53, 24.97], [-104.68, 25.32], [-105.03, 25.47], [-105.25, 26.0], [-105.15, 26.25], [-105.25, 26.5], [-105.15, 26.75], [-105.18, 26.82], [-105.53, 26.97], [-105.68, 27.32], [-106.03, 27.47], [-106.25, 28.0], [-106.03, 28.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 27.47], [-106.25, 28.0], [-106.03, 28.53], [-105.5, 28.75], [-105.25, 28.65], [-105.0, 28.75], [-104.75, 28.65], [-104.5, 28.75], [-104.25, 28.65], [-104.0, 28.75], [-103.75, 28.65], [-103.68, 28.68], [-103.52999999999997, 29.03], [-103.18, 29.18], [-103.02999999999997, 29.53], [-102.5, 29.75], [-101.97000000000003, 29.53], [-101.75, 29.0], [-101.85000000000002, 28.75], [-101.75, 28.5], [-101.85000000000002, 28.25], [-101.75, 28.0], [-101.95999999999998, 27.5], [-101.75, 27.0], [-101.85000000000002, 26.75], [-101.82, 26.68], [-101.47000000000003, 26.53], [-101.32, 26.18], [-101.25, 26.15], [-101.0, 26.25], [-100.47000000000003, 26.03], [-100.25, 25.5], [-100.47000000000003, 24.97], [-101.0, 24.75], [-101.25, 24.85], [-101.5, 24.75], [-101.75, 24.85], [-101.82, 24.82], [-101.97000000000003, 24.47], [-102.5, 24.25], [-102.75, 24.35], [-103.0, 24.25], [-103.25, 24.35], [-103.5, 24.25], [-104.03, 24.47], [-104.18, 24.82], [-104.53, 24.97], [-104.68, 25.32], [-105.03, 25.47], [-105.25, 26.0], [-105.15, 26.25], [-105.25, 26.5], [-105.15, 26.75], [-105.18, 26.82], [-105.53, 26.97], [-105.68, 27.32], [-106.03, 27.47]]]]}, "2025-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 27.47], [-106.25, 28.0], [-106.03, 28.53], [-105.5, 28.75], [-105.25, 28.65], [-105.0, 28.75], [-104.75, 28.65], [-104.5, 28.75], [-104.25, 28.65], [-104.0, 28.75], [-103.75, 28.65], [-103.68, 28.68], [-103.52999999999997, 29.03], [-103.18, 29.18], [-103.02999999999997, 29.53], [-102.5, 29.75], [-101.97000000000003, 29.53], [-101.75, 29.0], [-101.85000000000002, 28.75], [-101.75, 28.5], [-101.85000000000002, 28.25], [-101.75, 28.0], [-101.95999999999998, 27.5], [-101.75, 27.0], [-101.85000000000002, 26.75], [-101.82, 26.68], [-101.47000000000003, 26.53], [-101.32, 26.18], [-101.25, 26.15], [-101.0, 26.25], [-100.47000000000003, 26.03], [-100.25, 25.5], [-100.47000000000003, 24.97], [-101.0, 24.75], [-101.25, 24.85], [-101.5, 24.75], [-101.75, 24.85], [-101.82, 24.82], [-101.97000000000003, 24.47], [-102.5, 24.25], [-102.75, 24.35], [-103.0, 24.25], [-103.25, 24.35], [-103.5, 24.25], [-104.03, 24.47], [-104.18, 24.82], [-104.53, 24.97], [-104.68, 25.32], [-105.03, 25.47], [-105.25, 26.0], [-105.15, 26.25], [-105.25, 26.5], [-105.15, 26.75], [-105.18, 26.82], [-105.53, 26.97], [-105.68, 27.32], [-106.03, 27.47]]]]}, "2025-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 27.47], [-106.25, 28.0], [-106.03, 28.53], [-105.5, 28.75], [-105.25, 28.65], [-105.0, 28.75], [-104.75, 28.65], [-104.5, 28.75], [-104.25, 28.65], [-104.0, 28.75], [-103.75, 28.65], [-103.68, 28.68], [-103.52999999999997, 29.03], [-103.18, 29.18], [-103.02999999999997, 29.53], [-102.5, 29.75], 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.502102883118755}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.083327570969516, 21.51673185767197, 21.516835505787924]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.219419097900413, 16.296296691894554, 17.299590047200525]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.874632999175654, -4.36888818499286, -4.262787465187747]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.827634193929953, -6.140929361379165, -4.91397066679059]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8638264439837493, -1.644901062880213, -1.5214336341606964]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7311637950767387, -2.1166539199813443, -1.8639627570274624]}}