{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:37.370679", "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-23_323.0_-7.0"}, "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": 2023120000340}, "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 23 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 153576.24804875161}, "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": ["Brazil"]}, "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": -7.0}, "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": 323.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "323.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 320.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 324.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -4.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-40.04, -5.5], [-40.18, -5.18], [-40.53, -5.03], [-40.75, -4.5], [-40.53, -3.97], [-40.0, -3.75], [-39.75, -3.85], [-39.5, -3.75], [-39.25, -3.85], [-39.0, -3.75], [-38.75, -3.85], [-38.5, -3.75], [-37.97, -3.97], [-37.82, -4.32], [-37.75, -4.35], [-37.5, -4.25], [-36.97, -4.47], [-36.82, -4.82], [-36.75, -4.85], [-36.5, -4.75], [-35.97, -4.97], [-35.82, -5.32], [-35.47, -5.47], [-35.25, -6.0], [-35.35, -6.25], [-35.25, -6.5], [-35.35, -6.75], [-35.25, -7.0], [-35.35, -7.25], [-35.32, -7.32], [-34.97, -7.47], [-34.75, -8.0], [-34.97, -8.53], [-35.5, -8.75], [-35.75, -8.65], [-35.82, -8.68], [-35.97, -9.03], [-36.5, -9.25], [-37.03, -9.03], [-37.18, -8.68], [-37.25, -8.65], [-37.5, -8.75], [-38.03, -8.53], [-38.18, -8.18], [-38.53, -8.03], [-38.68, -7.68], [-38.75, -7.65], [-39.0, -7.75], [-39.25, -7.65], [-39.5, -7.75], [-40.03, -7.53], [-40.25, -7.0], [-40.15, -6.75], [-40.25, -6.5], [-40.15, -6.25], [-40.25, -6.0], [-40.04, -5.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-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": [[[[-36.5, -6.25], [-37.02999999999997, -6.03], [-37.25, -5.5], [-37.02999999999997, -4.97], [-36.5, -4.75], [-35.97000000000003, -4.97], [-35.75, -5.5], [-35.97000000000003, -6.03], [-36.5, -6.25]]], [[[-40.75, -4.5], [-40.52999999999997, -3.97], [-40.0, -3.75], [-39.75, -3.85], [-39.5, -3.75], [-39.25, -3.85], [-39.0, -3.75], [-38.75, -3.85], [-38.5, -3.75], [-37.97000000000003, -3.97], [-37.75, -4.5], [-37.85000000000002, -4.75], [-37.75, -5.0], [-37.95999999999998, -5.5], [-37.75, -6.0], [-37.97000000000003, -6.53], [-38.5, -6.75], [-38.75, -6.65], [-39.0, -6.75], [-39.52999999999997, -6.53], [-39.75, -6.0], [-39.64999999999998, -5.75], [-39.68000000000001, -5.68], [-40.02999999999997, -5.53], [-40.18000000000001, -5.18], [-40.52999999999997, -5.03], [-40.75, -4.5]]]]}, "2023-12-19T11:30:00.000000000": {"type": 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"mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1360263235595296}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.98892623681138, 25.74090714194307, 25.145958828601465, 26.216771660135578, 27.94293969491497, 27.794376911356892]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.40044220884846, 22.47410140768926, 22.447765594565226, 22.709590953613713, 26.62923780691625, 26.39416628977159]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4121213550421885, -2.163681643880624, -2.755766447117312, -1.71561161578715, -1.0620451472512968, -1.240484033778311]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.87507722010497, -3.1037388867323443, -4.323060414316558, -2.654578213806815, -1.1685490210850844, -1.3886548051112868]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4255923942924413, -2.0740785723545905, -2.7436636836021147, -1.791247394559187, -1.2587367373619724, -1.5409551312836254]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9720046739331443, -2.8680654060463233, -4.011828637059395, -2.390812046330556, -1.4087340322420103, -1.8317166396019648]}}