{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:30.342849", "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": "2023-Oct-08_to_2023-Oct-10_278.5_30.5"}, "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": 2023100000233}, "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": "October 08 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 10 2023"}, "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": 155883.82690674288}, "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": ["United States"]}, "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": ["Atlantic 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": 30.5}, "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": 278.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "278.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 273.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 279.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-87.25, 29.0], [-87.03, 29.53], [-86.5, 29.75], [-86.25, 29.65], [-86.0, 29.75], [-85.75, 29.65], [-85.68, 29.68], [-85.65, 29.75], [-85.75, 30.0], [-85.53, 30.53], [-85.18, 30.68], [-85.03, 31.03], [-84.5, 31.25], [-84.25, 31.15], [-84.0, 31.25], [-83.75, 31.15], [-83.68, 31.18], [-83.65, 31.25], [-83.75, 31.5], [-83.53, 32.03], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.0, 32.25], [-81.75, 32.15], [-81.5, 32.25], [-80.97, 32.03], [-80.75, 31.5], [-80.85, 31.25], [-80.82, 31.18], [-80.47, 31.03], [-80.25, 30.5], [-80.35, 30.25], [-80.25, 30.0], [-80.46, 29.5], [-80.25, 29.0], [-80.47, 28.47], [-80.82, 28.32], [-80.97, 27.97], [-81.5, 27.75], [-81.75, 27.85], [-82.0, 27.75], [-82.25, 27.85], [-82.5, 27.75], [-82.75, 27.85], [-83.0, 27.75], [-83.25, 27.85], [-83.5, 27.75], [-83.75, 27.85], [-84.0, 27.75], [-84.25, 27.85], [-84.5, 27.75], [-84.75, 27.85], [-84.82, 27.82], [-84.97, 27.47], [-85.5, 27.25], [-85.75, 27.35], [-86.0, 27.25], [-86.25, 27.35], [-86.5, 27.25], [-87.03, 27.47], [-87.25, 28.0], [-87.15, 28.25], [-87.25, 28.5], [-87.15, 28.75], [-87.25, 29.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-10-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.25, 28.5], [-87.14999999999998, 28.75], [-87.25, 29.0], [-87.02999999999997, 29.53], [-86.5, 29.75], [-86.25, 29.65], [-86.0, 29.75], [-85.75, 29.65], [-85.68, 29.68], [-85.64999999999998, 29.75], [-85.75, 30.0], [-85.52999999999997, 30.53], [-85.18, 30.68], [-85.02999999999997, 31.03], [-84.5, 31.25], [-84.25, 31.15], [-84.0, 31.25], [-83.75, 31.15], [-83.68, 31.18], [-83.64999999999998, 31.25], [-83.75, 31.5], [-83.52999999999997, 32.03], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.0, 32.25], [-81.75, 32.15], [-81.5, 32.25], [-80.97000000000003, 32.03], [-80.75, 31.5], [-80.85000000000002, 31.25], [-80.82, 31.18], [-80.47000000000003, 31.03], [-80.25, 30.5], [-80.35000000000002, 30.25], [-80.25, 30.0], [-80.45999999999998, 29.5], [-80.25, 29.0], [-80.47000000000003, 28.47], [-80.82, 28.32], [-80.97000000000003, 27.97], [-81.5, 27.75], [-81.75, 27.85], [-82.0, 27.75], [-82.25, 27.85], [-82.5, 27.75], [-82.75, 27.85], [-83.0, 27.75], [-83.25, 27.85], [-83.5, 27.75], [-83.75, 27.85], [-84.0, 27.75], [-84.25, 27.85], [-84.5, 27.75], [-84.75, 27.85], [-84.82, 27.82], [-84.97000000000003, 27.47], [-85.5, 27.25], [-85.75, 27.35], [-86.0, 27.25], [-86.25, 27.35], [-86.5, 27.25], [-87.02999999999997, 27.47], [-87.25, 28.0], [-87.14999999999998, 28.25], [-87.25, 28.5]]]]}, "2023-10-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.25, 28.5], [-87.14999999999998, 28.75], [-87.25, 29.0], [-87.02999999999997, 29.53], [-86.5, 29.75], [-86.25, 29.65], [-86.0, 29.75], [-85.75, 29.65], [-85.68, 29.68], [-85.64999999999998, 29.75], [-85.75, 30.0], [-85.52999999999997, 30.53], [-85.18, 30.68], [-85.02999999999997, 31.03], [-84.5, 31.25], [-84.25, 31.15], [-84.0, 31.25], [-83.75, 31.15], [-83.68, 31.18], [-83.64999999999998, 31.25], [-83.75, 31.5], [-83.52999999999997, 32.03], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.0, 32.25], [-81.75, 32.15], [-81.5, 32.25], [-80.97000000000003, 32.03], [-80.75, 31.5], [-80.85000000000002, 31.25], [-80.82, 31.18], [-80.47000000000003, 31.03], [-80.25, 30.5], [-80.35000000000002, 30.25], [-80.25, 30.0], [-80.45999999999998, 29.5], [-80.25, 29.0], [-80.47000000000003, 28.47], [-80.82, 28.32], [-80.97000000000003, 27.97], [-81.5, 27.75], [-81.75, 27.85], [-82.0, 27.75], [-82.25, 27.85], [-82.5, 27.75], [-82.75, 27.85], [-83.0, 27.75], [-83.25, 27.85], [-83.5, 27.75], [-83.75, 27.85], [-84.0, 27.75], [-84.25, 27.85], [-84.5, 27.75], [-84.75, 27.85], [-84.82, 27.82], [-84.97000000000003, 27.47], [-85.5, 27.25], [-85.75, 27.35], [-86.0, 27.25], [-86.25, 27.35], [-86.5, 27.25], [-87.02999999999997, 27.47], [-87.25, 28.0], [-87.14999999999998, 28.25], [-87.25, 28.5]]]]}, "2023-10-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.25, 28.5], [-87.14999999999998, 28.75], [-87.25, 29.0], [-87.02999999999997, 29.53], [-86.5, 29.75], [-86.25, 29.65], [-86.0, 29.75], [-85.75, 29.65], [-85.68, 29.68], [-85.64999999999998, 29.75], [-85.75, 30.0], [-85.52999999999997, 30.53], [-85.18, 30.68], [-85.02999999999997, 31.03], [-84.5, 31.25], [-84.25, 31.15], [-84.0, 31.25], [-83.75, 31.15], [-83.68, 31.18], [-83.64999999999998, 31.25], [-83.75, 31.5], [-83.52999999999997, 32.03], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.0, 32.25], [-81.75, 32.15], [-81.5, 32.25], [-80.97000000000003, 32.03], [-80.75, 31.5], [-80.85000000000002, 31.25], [-80.82, 31.18], [-80.47000000000003, 31.03], [-80.25, 30.5], [-80.35000000000002, 30.25], [-80.25, 30.0], [-80.45999999999998, 29.5], [-80.25, 29.0], [-80.47000000000003, 28.47], [-80.82, 28.32], [-80.97000000000003, 27.97], [-81.5, 27.75], [-81.75, 27.85], [-82.0, 27.75], [-82.25, 27.85], [-82.5, 27.75], [-82.75, 27.85], [-83.0, 27.75], [-83.25, 27.85], [-83.5, 27.75], [-83.75, 27.85], [-84.0, 27.75], [-84.25, 27.85], [-84.5, 27.75], [-84.75, 27.85], [-84.82, 27.82], [-84.97000000000003, 27.47], [-85.5, 27.25], [-85.75, 27.35], [-86.0, 27.25], [-86.25, 27.35], [-86.5, 27.25], [-87.02999999999997, 27.47], [-87.25, 28.0], [-87.14999999999998, 28.25], [-87.25, 28.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.282102631440978}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6324002025559348}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.059844817134035, 19.59977588920009, 20.743133661126194]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.644902772447324, 14.502110085021627, 16.77328025837045]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1511158613770704, -4.493515983487754, -3.2525687628029734]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.274665127592868, -7.282102631440978, -5.105416830184765]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.46612597853596, -2.0614302495736143, -1.5015722576500898]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.808695181894672, -2.4867359718001665, -1.978086101919419]}}