{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:53.311741", "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-Jan-08_to_2025-Jan-10_316.5_-15.5"}, "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": 2025010000244}, "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": "January 08 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 10 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": 53569.62435151555}, "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": -15.5}, "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": 316.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "316.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 315.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 318.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-44.5, -14.25], [-44.25, -14.35], [-44.0, -14.25], [-43.75, -14.35], [-43.5, -14.25], [-43.25, -14.35], [-43.0, -14.25], [-42.75, -14.35], [-42.5, -14.25], [-41.97, -14.47], [-41.82, -14.82], [-41.47, -14.97], [-41.25, -15.5], [-41.35, -15.75], [-41.25, -16.0], [-41.47, -16.53], [-41.82, -16.68], [-41.97, -17.03], [-42.5, -17.25], [-42.8, -17.12], [-42.97, -17.53], [-43.5, -17.75], [-44.03, -17.53], [-44.25, -17.0], [-44.15, -16.75], [-44.18, -16.68], [-44.53, -16.53], [-44.68, -16.18], [-45.03, -16.03], [-45.25, -15.5], [-45.15, -15.25], [-45.25, -15.0], [-45.03, -14.47], [-44.5, -14.25]]]]}}, "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": {"2025-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-45.25, -15.0], [-45.02999999999997, -14.47], [-44.5, -14.25], [-44.25, -14.35], [-44.0, -14.25], [-43.75, -14.35], [-43.5, -14.25], [-43.25, -14.35], [-43.0, -14.25], [-42.75, -14.35], [-42.5, -14.25], [-41.97000000000003, -14.47], [-41.81999999999999, -14.82], [-41.47000000000003, -14.97], [-41.25, -15.5], [-41.35000000000002, -15.75], [-41.25, -16.0], [-41.47000000000003, -16.53], [-41.81999999999999, -16.68], [-41.97000000000003, -17.03], [-42.5, -17.25], [-42.80000000000001, -17.12], [-42.97000000000003, -17.53], [-43.5, -17.75], [-44.02999999999997, -17.53], [-44.25, -17.0], [-44.14999999999998, -16.75], [-44.18000000000001, -16.68], [-44.52999999999997, -16.53], [-44.68000000000001, -16.18], [-45.02999999999997, -16.03], [-45.25, -15.5], [-45.14999999999998, -15.25], [-45.25, -15.0]]]]}, "2025-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-45.25, -15.0], [-45.02999999999997, -14.47], [-44.5, -14.25], [-44.25, -14.35], [-44.0, -14.25], [-43.75, -14.35], [-43.5, -14.25], [-43.25, -14.35], [-43.0, -14.25], [-42.75, -14.35], [-42.5, -14.25], [-41.97000000000003, -14.47], [-41.81999999999999, -14.82], [-41.47000000000003, -14.97], [-41.25, -15.5], [-41.35000000000002, -15.75], [-41.25, -16.0], [-41.47000000000003, -16.53], [-41.81999999999999, -16.68], [-41.97000000000003, -17.03], [-42.5, -17.25], [-42.80000000000001, -17.12], [-42.97000000000003, -17.53], [-43.5, -17.75], [-44.02999999999997, -17.53], [-44.25, -17.0], [-44.14999999999998, -16.75], [-44.18000000000001, -16.68], [-44.52999999999997, -16.53], [-44.68000000000001, -16.18], [-45.02999999999997, -16.03], [-45.25, -15.5], [-45.14999999999998, -15.25], [-45.25, -15.0]]]]}, "2025-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-45.25, -15.0], [-45.02999999999997, -14.47], [-44.5, -14.25], [-44.25, -14.35], [-44.0, -14.25], [-43.75, -14.35], [-43.5, -14.25], [-43.25, -14.35], [-43.0, -14.25], [-42.75, -14.35], [-42.5, -14.25], [-41.97000000000003, -14.47], [-41.81999999999999, -14.82], [-41.47000000000003, -14.97], [-41.25, -15.5], [-41.35000000000002, -15.75], [-41.25, -16.0], [-41.47000000000003, -16.53], [-41.81999999999999, -16.68], [-41.97000000000003, -17.03], [-42.5, -17.25], [-42.80000000000001, -17.12], [-42.97000000000003, -17.53], [-43.5, -17.75], [-44.02999999999997, -17.53], [-44.25, -17.0], [-44.14999999999998, -16.75], [-44.18000000000001, -16.68], [-44.52999999999997, -16.53], [-44.68000000000001, -16.18], [-45.02999999999997, -16.03], [-45.25, -15.5], [-45.14999999999998, -15.25], [-45.25, -15.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.510178992752344}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3371678479807496}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.142219232629884, 22.865417452211716, 22.84023282086406]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.808108266194665, 21.312090810139978, 21.391723887125693]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.830435288591212, -2.0941142806422843, -2.0869539747087535]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.510178992752344, -2.3364721018850787, -2.641077259878216]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0246336792875534, -1.4985504843416289, -1.4989419794064984]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3977690053020626, -1.711376998847412, -1.8142190689250903]}}