{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:50.809077", "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-Mar-14_to_2025-Mar-19_319.5_-6.0"}, "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": 2025030000408}, "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": "March 14 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 19 2025"}, "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": 61565.15564977716}, "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": -6.0}, "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": 319.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "319.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 319.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 322.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -6.0}, "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": [[[[-41.03, -6.53], [-41.18, -6.18], [-41.53, -6.03], [-41.75, -5.5], [-41.53, -4.97], [-41.12, -4.8], [-41.25, -4.5], [-41.03, -3.97], [-40.5, -3.75], [-39.97, -3.97], [-39.82, -4.32], [-39.75, -4.35], [-39.68, -4.32], [-39.53, -3.97], [-39.0, -3.75], [-38.75, -3.85], [-38.5, -3.75], [-38.25, -3.85], [-38.0, -3.75], [-37.47, -3.97], [-37.32, -4.32], [-36.97, -4.47], [-36.75, -5.0], [-36.85, -5.25], [-36.75, -5.5], [-36.97, -6.03], [-37.5, -6.25], [-37.75, -6.15], [-38.0, -6.25], [-38.25, -6.15], [-38.5, -6.25], [-38.75, -6.15], [-38.82, -6.18], [-38.97, -6.53], [-39.5, -6.75], [-40.0, -6.54], [-40.5, -6.75], [-41.03, -6.53]]]]}}, "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": {"2025-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.02999999999997, -3.97], [-40.5, -3.75], [-39.97000000000003, -3.97], [-39.75, -4.5], [-39.97000000000003, -5.03], [-40.5, -5.25], [-41.02999999999997, -5.03], [-41.25, -4.5], [-41.02999999999997, -3.97]]]]}, "2025-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.52999999999997, -6.03], [-41.75, -5.5], [-41.52999999999997, -4.97], [-41.120000000000005, -4.8], [-41.25, -4.5], [-41.02999999999997, -3.97], [-40.5, -3.75], [-39.97000000000003, -3.97], [-39.81999999999999, -4.32], [-39.75, -4.35], [-39.68000000000001, -4.32], [-39.52999999999997, -3.97], [-39.0, -3.75], [-38.75, -3.85], [-38.5, -3.75], [-38.25, -3.85], [-38.0, -3.75], [-37.47000000000003, -3.97], [-37.31999999999999, -4.32], [-36.97000000000003, -4.47], [-36.75, -5.0], [-36.85000000000002, -5.25], [-36.75, -5.5], [-36.97000000000003, -6.03], [-37.5, -6.25], [-37.75, -6.15], [-38.0, -6.25], [-38.25, -6.15], [-38.5, -6.25], [-38.75, -6.15], [-38.81999999999999, -6.18], [-38.97000000000003, -6.53], [-39.5, -6.75], [-40.0, -6.54], [-40.5, -6.75], [-41.02999999999997, -6.53], [-41.18000000000001, -6.18], [-41.52999999999997, -6.03]]]]}, "2025-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.52999999999997, -6.03], [-41.75, -5.5], [-41.52999999999997, -4.97], [-41.120000000000005, -4.8], [-41.25, -4.5], [-41.02999999999997, -3.97], [-40.5, -3.75], [-39.97000000000003, -3.97], [-39.81999999999999, -4.32], [-39.75, -4.35], [-39.68000000000001, -4.32], [-39.52999999999997, -3.97], [-39.0, -3.75], [-38.75, -3.85], [-38.5, -3.75], [-38.25, -3.85], [-38.0, -3.75], [-37.47000000000003, -3.97], [-37.31999999999999, -4.32], [-36.97000000000003, -4.47], [-36.75, -5.0], [-36.85000000000002, -5.25], [-36.75, -5.5], [-36.97000000000003, -6.03], [-37.5, -6.25], [-37.75, -6.15], [-38.0, -6.25], [-38.25, -6.15], [-38.5, -6.25], [-38.75, -6.15], [-38.81999999999999, -6.18], [-38.97000000000003, -6.53], [-39.5, -6.75], [-40.0, -6.54], [-40.5, -6.75], [-41.02999999999997, -6.53], [-41.18000000000001, -6.18], [-41.52999999999997, -6.03]]]]}, "2025-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.52999999999997, -6.03], [-41.75, -5.5], [-41.52999999999997, -4.97], [-41.0, -4.75], [-40.75, -4.85], [-40.68000000000001, -4.82], [-40.52999999999997, -4.47], [-40.0, -4.25], [-39.75, -4.35], [-39.68000000000001, -4.32], [-39.52999999999997, -3.97], [-39.0, -3.75], [-38.75, -3.85], [-38.5, -3.75], [-38.25, -3.85], [-38.0, -3.75], [-37.47000000000003, -3.97], [-37.31999999999999, -4.32], [-36.97000000000003, -4.47], [-36.75, -5.0], [-36.85000000000002, -5.25], [-36.75, -5.5], [-36.97000000000003, -6.03], [-37.5, -6.25], [-37.75, -6.15], [-38.0, -6.25], [-38.25, -6.15], [-38.5, -6.25], [-38.75, -6.15], [-38.81999999999999, -6.18], [-38.97000000000003, -6.53], [-39.5, -6.75], [-40.0, -6.54], [-40.5, -6.75], [-41.02999999999997, -6.53], [-41.18000000000001, -6.18], [-41.52999999999997, -6.03]]]]}, "2025-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.02999999999997, -5.47], [-40.5, -5.25], [-39.97000000000003, -5.47], [-39.75, -6.0], [-39.97000000000003, -6.53], [-40.5, -6.75], [-41.02999999999997, -6.53], [-41.25, -6.0], [-41.02999999999997, -5.47]]]]}, "2025-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.02999999999997, -5.47], [-40.5, -5.25], [-39.97000000000003, -5.47], [-39.75, -6.0], [-39.97000000000003, -6.53], [-40.5, -6.75], [-41.02999999999997, -6.53], [-41.25, -6.0], [-41.02999999999997, -5.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.61413361824782}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.881283701564391}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.2271553039551, 24.912965138753236, 24.72925516764326, 25.09251074539992, 24.344356791178427, 24.17020950317385]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.2271553039551, 23.35219853719076, 23.6087636311849, 23.666866556803427, 24.344356791178427, 24.17020950317385]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5207527816397715, -1.929164721679453, -2.0756861336636776, -1.6923494051203505, -1.3651066773920206, -1.5020742338111859]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.5207527816397715, -2.4427408824226404, -2.61413361824782, -1.967401593191255, -1.3651066773920206, -1.5020742338111859]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.015741996930549, -1.399287409473249, -1.554890863083103, -1.290903719250048, -1.0965652145737468, -1.3033253383743642]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.015741996930549, -1.636903630627503, -2.5052092590939963, -1.4835532175489397, -1.0965652145737468, -1.3033253383743642]}}