{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:05.631304", "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": "2011-Dec-12_to_2011-Dec-16_275.0_9.0"}, "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": 2011120000723}, "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": "December 12 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 16 2011"}, "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": 73363.0912336738}, "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": ["Costa Rica"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Central-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": ["North 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": 9.0}, "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": 275.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "275.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 272.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 276.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 7.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 10.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.0, 9.75], [-84.47, 9.53], [-84.25, 9.0], [-84.47, 8.47], [-84.82, 8.32], [-84.97, 7.97], [-85.5, 7.75], [-86.03, 7.97], [-86.25, 8.5], [-86.03, 9.03], [-85.68, 9.18], [-85.53, 9.53], [-85.0, 9.75]]]]}, "2011-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.03, 6.97], [-88.25, 7.5], [-88.03, 8.03], [-87.5, 8.25], [-87.25, 8.15], [-87.0, 8.25], [-86.75, 8.15], [-86.68, 8.18], [-86.53, 8.53], [-86.18, 8.68], [-86.15, 8.75], [-86.25, 9.0], [-86.15, 9.25], [-86.25, 9.5], [-86.15, 9.75], [-86.25, 10.0], [-86.15, 10.25], [-86.25, 10.5], [-86.03, 11.03], [-85.5, 11.25], [-84.97, 11.03], [-84.82, 10.68], [-84.47, 10.53], [-84.25, 10.0], [-84.35, 9.75], [-84.25, 9.5], [-84.35, 9.25], [-84.32, 9.18], [-84.25, 9.15], [-84.0, 9.25], [-83.47, 9.03], [-83.25, 8.5], [-83.35, 8.25], [-83.25, 8.0], [-83.47, 7.47], [-84.0, 7.25], [-84.25, 7.35], [-84.5, 7.25], [-84.75, 7.35], [-84.82, 7.32], [-84.97, 6.97], [-85.5, 6.75], [-86.0, 6.96], [-86.5, 6.75], [-86.75, 6.85], [-87.0, 6.75], [-87.25, 6.85], [-87.5, 6.75], [-88.03, 6.97]]]]}, "2011-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.15, 8.25], [-88.25, 8.5], [-88.03, 9.03], [-87.5, 9.25], [-86.97, 9.03], [-86.82, 8.68], [-86.75, 8.65], [-86.5, 8.75], [-86.25, 8.65], [-86.18, 8.68], [-86.15, 8.75], [-86.25, 9.0], [-86.15, 9.25], [-86.25, 9.5], [-86.15, 9.75], [-86.25, 10.0], [-86.15, 10.25], [-86.25, 10.5], [-86.03, 11.03], [-85.5, 11.25], [-84.97, 11.03], [-84.82, 10.68], [-84.47, 10.53], [-84.25, 10.0], [-84.35, 9.75], [-84.25, 9.5], [-84.35, 9.25], [-84.32, 9.18], [-84.25, 9.15], [-84.0, 9.25], [-83.47, 9.03], [-83.25, 8.5], [-83.35, 8.25], [-83.25, 8.0], [-83.47, 7.47], [-84.0, 7.25], [-84.25, 7.35], [-84.5, 7.25], [-84.75, 7.35], [-84.82, 7.32], [-84.97, 6.97], [-85.5, 6.75], [-86.0, 6.96], [-86.5, 6.75], [-86.75, 6.85], [-87.0, 6.75], [-87.25, 6.85], [-87.5, 6.75], [-88.03, 6.97], [-88.25, 7.5], [-88.15, 7.75], [-88.25, 8.0], [-88.15, 8.25]]]]}, "2011-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.15, 8.25], [-88.25, 8.5], [-88.03, 9.03], [-87.5, 9.25], [-86.97, 9.03], [-86.82, 8.68], [-86.75, 8.65], [-86.5, 8.75], [-86.25, 8.65], [-86.18, 8.68], [-86.15, 8.75], [-86.25, 9.0], [-86.15, 9.25], [-86.25, 9.5], [-86.15, 9.75], [-86.25, 10.0], [-86.15, 10.25], [-86.25, 10.5], [-86.03, 11.03], [-85.5, 11.25], [-84.97, 11.03], [-84.82, 10.68], [-84.47, 10.53], [-84.25, 10.0], [-84.35, 9.75], [-84.25, 9.5], [-84.35, 9.25], [-84.32, 9.18], [-84.25, 9.15], [-84.0, 9.25], [-83.47, 9.03], [-83.25, 8.5], [-83.35, 8.25], [-83.25, 8.0], [-83.47, 7.47], [-84.0, 7.25], [-84.25, 7.35], [-84.5, 7.25], [-84.75, 7.35], [-84.82, 7.32], [-84.97, 6.97], [-85.5, 6.75], [-86.0, 6.96], [-86.5, 6.75], [-86.75, 6.85], [-87.0, 6.75], [-87.25, 6.85], [-87.5, 6.75], [-88.03, 6.97], [-88.25, 7.5], [-88.15, 7.75], [-88.25, 8.0], [-88.15, 8.25]]]]}, "2011-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.03, 9.03], [-87.5, 9.25], [-86.97, 9.03], [-86.82, 8.68], [-86.75, 8.65], [-86.5, 8.75], [-85.97, 8.53], [-85.8, 8.12], [-85.5, 8.25], [-84.97, 8.03], [-84.75, 7.5], [-84.97, 6.97], [-85.5, 6.75], [-86.0, 6.96], [-86.5, 6.75], [-86.75, 6.85], [-87.0, 6.75], [-87.53, 6.97], [-87.68, 7.32], [-88.03, 7.47], [-88.25, 8.0], [-88.15, 8.25], [-88.25, 8.5], [-88.03, 9.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.8867917970929398}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.115728713381188}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.355783700645418, 25.225514547922103, 25.05414733982451, 25.01036570751603, 25.00325687255878]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.273818932735878, 24.135334552728807, 23.476493281123908, 23.554363280780592, 24.859067490714267]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0634152959527228, -0.9963024650933221, -1.151112420549919, -1.187944217389024, -1.1029816751492783]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1640713349297585, -1.439603750493859, -1.7432173009776193, -1.8867917970929398, -1.2273997962488465]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5099950600075855, -1.404000613566064, -1.5414721567836984, -1.5600400606543259, -1.2953136954208178]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7003513567302726, -1.6339357544484439, -2.031023429100713, -2.1089772666311486, -1.5123525000176388]}}