{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:37.463899", "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-Dec-18_to_2023-Dec-25_263.0_16.0"}, "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": 2023120000341}, "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 18 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 25 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 80647.74051943213}, "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": ["Pacific Ocean", "Tehuantepec Ridge"]}, "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": 16.0}, "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": 263.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "263.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 262.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 265.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-94.75, 14.0], [-94.97, 13.47], [-95.32, 13.32], [-95.47, 12.97], [-95.82, 12.82], [-95.97, 12.47], [-96.5, 12.25], [-96.75, 12.35], [-97.0, 12.25], [-97.25, 12.35], [-97.5, 12.25], [-98.03, 12.47], [-98.18, 12.82], [-98.53, 12.97], [-98.75, 13.5], [-98.53, 14.03], [-98.18, 14.18], [-98.15, 14.25], [-98.25, 14.5], [-98.15, 14.75], [-98.25, 15.0], [-98.03, 15.53], [-97.62, 15.7], [-97.75, 16.0], [-97.53, 16.53], [-97.18, 16.68], [-97.13, 16.8], [-97.53, 16.97], [-97.75, 17.5], [-97.53, 18.03], [-97.0, 18.25], [-96.75, 18.15], [-96.5, 18.25], [-95.97, 18.03], [-95.82, 17.68], [-95.47, 17.53], [-95.25, 17.0], [-95.35, 16.75], [-95.32, 16.68], [-94.97, 16.53], [-94.82, 16.18], [-94.47, 16.03], [-94.25, 15.5], [-94.35, 15.25], [-94.25, 15.0], [-94.47, 14.47], [-94.82, 14.32], [-94.85, 14.25], [-94.75, 14.0]], [[-96.15, 15.25], [-96.2, 15.38], [-96.5, 15.25], [-96.75, 15.35], [-96.87, 15.3], [-96.75, 15.0], [-96.85, 14.75], [-96.75, 14.5], [-96.53, 15.03], [-96.18, 15.18], [-96.15, 15.25]], [[-96.85, 14.25], [-96.82, 14.18], [-96.75, 14.15], [-96.68, 14.18], [-96.65, 14.25], [-96.75, 14.5], [-96.85, 14.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.02999999999997, 14.53], [-97.5, 14.75], [-96.97000000000003, 14.53], [-96.75, 14.0], [-96.85000000000002, 13.75], [-96.75, 13.5], [-96.97000000000003, 12.97], [-97.5, 12.75], [-98.02999999999997, 12.97], [-98.25, 13.5], [-98.14999999999998, 13.75], [-98.25, 14.0], [-98.02999999999997, 14.53]]], [[[-96.14999999999998, 15.25], [-96.25, 15.5], [-96.02999999999997, 16.03], [-95.5, 16.25], [-95.25, 16.15], [-95.0, 16.25], [-94.47000000000003, 16.03], [-94.25, 15.5], [-94.47000000000003, 14.97], [-94.82, 14.82], [-94.85000000000002, 14.75], [-94.75, 14.5], [-94.97000000000003, 13.97], [-95.5, 13.75], [-96.02999999999997, 13.97], [-96.25, 14.5], [-96.14999999999998, 14.75], [-96.25, 15.0], [-96.14999999999998, 15.25]]]]}, "2023-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.14999999999998, 14.25], [-98.25, 14.5], [-98.14999999999998, 14.75], [-98.25, 15.0], [-98.02999999999997, 15.53], [-97.5, 15.75], [-96.97000000000003, 15.53], [-96.75, 15.0], [-96.85000000000002, 14.75], [-96.75, 14.5], [-96.52999999999997, 15.03], [-96.18, 15.18], [-96.14999999999998, 15.25], [-96.25, 15.5], [-96.14999999999998, 15.75], [-96.18, 15.82], [-96.25, 15.85], [-96.5, 15.75], [-97.02999999999997, 15.97], [-97.25, 16.5], [-97.12, 16.8], [-97.52999999999997, 16.97], [-97.75, 17.5], [-97.52999999999997, 18.03], [-97.0, 18.25], [-96.75, 18.15], [-96.5, 18.25], [-95.97000000000003, 18.03], [-95.82, 17.68], [-95.47000000000003, 17.53], [-95.25, 17.0], [-95.35000000000002, 16.75], [-95.32, 16.68], [-94.97000000000003, 16.53], [-94.82, 16.18], [-94.47000000000003, 16.03], [-94.25, 15.5], [-94.35000000000002, 15.25], [-94.25, 15.0], [-94.47000000000003, 14.47], [-94.82, 14.32], [-94.85000000000002, 14.25], [-94.75, 14.0], [-94.97000000000003, 13.47], [-95.32, 13.32], [-95.47000000000003, 12.97], [-96.0, 12.75], [-96.25, 12.85], [-96.5, 12.75], [-96.75, 12.85], [-97.0, 12.75], [-97.25, 12.85], [-97.5, 12.75], [-97.75, 12.85], [-98.0, 12.75], [-98.52999999999997, 12.97], [-98.75, 13.5], [-98.52999999999997, 14.03], [-98.18, 14.18], [-98.14999999999998, 14.25]], [[-96.85000000000002, 14.25], [-96.82, 14.18], [-96.75, 14.15], [-96.68, 14.18], [-96.64999999999998, 14.25], [-96.75, 14.5], [-96.85000000000002, 14.25]]]]}, "2023-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.52999999999997, 12.97], [-98.75, 13.5], [-98.52999999999997, 14.03], [-98.18, 14.18], [-98.14999999999998, 14.25], [-98.25, 14.5], [-98.14999999999998, 14.75], [-98.25, 15.0], [-98.02999999999997, 15.53], [-97.62, 15.7], [-97.75, 16.0], [-97.52999999999997, 16.53], [-97.18, 16.68], [-97.12, 16.8], [-97.52999999999997, 16.97], [-97.75, 17.5], [-97.52999999999997, 18.03], [-97.0, 18.25], [-96.75, 18.15], [-96.5, 18.25], [-95.97000000000003, 18.03], [-95.82, 17.68], [-95.47000000000003, 17.53], [-95.25, 17.0], [-95.35000000000002, 16.75], [-95.32, 16.68], [-94.97000000000003, 16.53], [-94.82, 16.18], [-94.47000000000003, 16.03], [-94.25, 15.5], [-94.35000000000002, 15.25], [-94.25, 15.0], [-94.47000000000003, 14.47], [-94.82, 14.32], [-94.85000000000002, 14.25], [-94.75, 14.0], [-94.97000000000003, 13.47], [-95.32, 13.32], [-95.47000000000003, 12.97], [-95.82, 12.82], [-95.97000000000003, 12.47], [-96.5, 12.25], [-96.75, 12.35], [-97.0, 12.25], [-97.25, 12.35], [-97.5, 12.25], [-98.02999999999997, 12.47], [-98.18, 12.82], [-98.52999999999997, 12.97]], [[-96.75, 14.15], [-96.68, 14.18], [-96.64999999999998, 14.25], [-96.75, 14.5], [-96.85000000000002, 14.25], [-96.82, 14.18], [-96.75, 14.15]], [[-96.52999999999997, 15.03], [-96.18, 15.18], [-96.14999999999998, 15.25], [-96.19999999999999, 15.38], [-96.5, 15.25], [-96.75, 15.35], [-96.87, 15.3], [-96.75, 15.0], [-96.85000000000002, 14.75], [-96.75, 14.5], [-96.52999999999997, 15.03]]]]}, "2023-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.52999999999997, 12.97], [-98.75, 13.5], [-98.52999999999997, 14.03], [-98.18, 14.18], [-98.14999999999998, 14.25], [-98.25, 14.5], [-98.14999999999998, 14.75], [-98.25, 15.0], [-98.02999999999997, 15.53], [-97.62, 15.7], [-97.75, 16.0], [-97.52999999999997, 16.53], [-97.18, 16.68], [-97.12, 16.8], [-97.52999999999997, 16.97], [-97.75, 17.5], [-97.52999999999997, 18.03], [-97.0, 18.25], [-96.75, 18.15], [-96.5, 18.25], [-95.97000000000003, 18.03], [-95.82, 17.68], [-95.47000000000003, 17.53], [-95.25, 17.0], [-95.35000000000002, 16.75], [-95.32, 16.68], [-94.97000000000003, 16.53], [-94.82, 16.18], [-94.47000000000003, 16.03], [-94.25, 15.5], [-94.35000000000002, 15.25], [-94.25, 15.0], [-94.47000000000003, 14.47], [-94.82, 14.32], [-94.85000000000002, 14.25], [-94.75, 14.0], [-94.97000000000003, 13.47], [-95.32, 13.32], [-95.47000000000003, 12.97], [-95.82, 12.82], [-95.97000000000003, 12.47], [-96.5, 12.25], [-96.75, 12.35], [-97.0, 12.25], [-97.25, 12.35], [-97.5, 12.25], [-98.02999999999997, 12.47], [-98.18, 12.82], [-98.52999999999997, 12.97]], [[-96.75, 14.15], [-96.68, 14.18], [-96.64999999999998, 14.25], [-96.75, 14.5], [-96.85000000000002, 14.25], [-96.82, 14.18], [-96.75, 14.15]], [[-96.52999999999997, 15.03], [-96.18, 15.18], [-96.14999999999998, 15.25], [-96.19999999999999, 15.38], [-96.5, 15.25], [-96.75, 15.35], [-96.87, 15.3], [-96.75, 15.0], [-96.85000000000002, 14.75], [-96.75, 14.5], [-96.52999999999997, 15.03]]]]}, "2023-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.52999999999997, 12.97], [-98.75, 13.5], [-98.52999999999997, 14.03], [-98.12, 14.2], [-98.25, 14.5], [-98.14999999999998, 14.75], [-98.25, 15.0], [-98.02999999999997, 15.53], [-97.62, 15.7], [-97.75, 16.0], [-97.52999999999997, 16.53], [-97.18, 16.68], [-97.02999999999997, 17.03], [-96.5, 17.25], [-96.25, 17.15], [-96.0, 17.25], [-95.47000000000003, 17.03], [-95.25, 16.5], [-95.37, 16.2], [-94.97000000000003, 16.03], [-94.82, 15.68], [-94.47000000000003, 15.53], [-94.25, 15.0], [-94.47000000000003, 14.47], [-94.82, 14.32], [-94.97000000000003, 13.97], [-95.32, 13.82], [-95.47000000000003, 13.47], [-95.82, 13.32], [-95.85000000000002, 13.25], [-95.75, 13.0], [-95.97000000000003, 12.47], [-96.5, 12.25], [-96.75, 12.35], [-97.0, 12.25], [-97.25, 12.35], [-97.5, 12.25], [-98.02999999999997, 12.47], [-98.18, 12.82], [-98.52999999999997, 12.97]], [[-96.64999999999998, 14.25], [-96.75, 14.5], [-96.93, 14.07], [-96.68, 14.18], [-96.64999999999998, 14.25]], [[-96.52999999999997, 15.03], [-96.18, 15.18], [-96.14999999999998, 15.25], [-96.19999999999999, 15.38], [-96.5, 15.25], [-96.75, 15.35], [-96.87, 15.3], [-96.75, 15.0], [-96.85000000000002, 14.75], [-96.75, 14.5], [-96.52999999999997, 15.03]], [[-97.25, 13.65], [-97.18, 13.68], [-97.07, 13.93], [-97.37, 13.8], [-97.32, 13.68], [-97.25, 13.65]]]]}, "2023-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.75, 13.5], [-98.52999999999997, 14.03], [-98.12, 14.2], [-98.25, 14.5], [-98.02999999999997, 15.03], [-97.5, 15.25], [-96.97000000000003, 15.03], [-96.75, 14.5], [-96.52999999999997, 15.03], [-96.0, 15.25], [-95.75, 15.15], [-95.5, 15.25], [-94.97000000000003, 15.03], [-94.75, 14.5], [-94.97000000000003, 13.97], [-95.5, 13.75], [-95.75, 13.85], [-95.87, 13.8], [-95.75, 13.5], [-95.97000000000003, 12.97], [-96.32, 12.82], [-96.47000000000003, 12.47], [-97.0, 12.25], [-97.25, 12.35], [-97.5, 12.25], [-98.02999999999997, 12.47], [-98.18, 12.82], [-98.52999999999997, 12.97], [-98.75, 13.5]], [[-96.93, 14.07], [-96.62, 14.2], [-96.75, 14.5], [-96.93, 14.07]], [[-97.18, 13.68], [-97.07, 13.93], [-97.37, 13.8], [-97.32, 13.68], [-97.25, 13.65], [-97.18, 13.68]]], [[[-97.52999999999997, 15.47], [-97.75, 16.0], [-97.52999999999997, 16.53], [-97.0, 16.75], [-96.75, 16.65], [-96.5, 16.75], [-95.97000000000003, 16.53], [-95.75, 16.0], [-95.97000000000003, 15.47], [-96.5, 15.25], [-96.75, 15.35], [-97.0, 15.25], [-97.52999999999997, 15.47]]]]}, "2023-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.0, 15.25], [-97.52999999999997, 15.47], [-97.75, 16.0], [-97.52999999999997, 16.53], [-97.0, 16.75], [-96.75, 16.65], [-96.5, 16.75], [-95.97000000000003, 16.53], [-95.75, 16.0], [-95.97000000000003, 15.47], [-96.5, 15.25], [-96.75, 15.35], [-97.0, 15.25]]]]}, "2023-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.02999999999997, 16.53], [-96.5, 16.75], [-95.97000000000003, 16.53], [-95.75, 16.0], [-95.97000000000003, 15.47], [-96.5, 15.25], [-97.02999999999997, 15.47], [-97.25, 16.0], [-97.02999999999997, 16.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.83950920735964}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.882946074212187}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.191375246802636, 21.462487595123775, 21.485483986982956, 21.781167096766524, 22.83052422060183, 23.54898500207304, 18.72184024494402, 17.382580541827963]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.07620219345216, 9.59463470366859, 8.995320776437268, 10.063105622839032, 14.723987174097147, 16.88045830588794, 16.697431371821835, 17.382580541827963]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6260187031632067, -2.135372957310497, -2.1626298667780013, -1.8724337841170011, -1.557721613297454, -1.3528740700637942, -1.742357667991513, -1.184128990963643]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9667992822731435, -4.279857519355744, -4.83950920735964, -3.334544651251747, -2.9550534229729806, -1.9059930397108928, -1.8743128000916727, -1.184128990963643]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3958560523458872, -1.5515394423777382, -1.6822127357390633, -1.5610523296660577, -1.4897141977450554, -1.5224287459878323, -2.0954513219865767, -1.397986380199176]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4605065524554206, -2.0705206286790467, -2.2441248910424676, -2.1991114907324154, -2.3010613201681025, -2.392202022741471, -2.128119236343062, -1.397986380199176]}}