{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:51.322318", "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-Aug-02_to_2025-Aug-05_322.0_-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": 2025080000179}, "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": "August 02 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 05 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 64198.84040740582}, "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": -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": 322.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "322.0\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": 322.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -9.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -7.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-40.0, -7.75], [-39.75, -7.85], [-39.5, -7.75], [-39.25, -7.85], [-39.18, -7.82], [-39.15, -7.75], [-39.25, -7.5], [-39.15, -7.25], [-39.25, -7.0], [-39.03, -6.47], [-38.5, -6.25], [-37.97, -6.47], [-37.82, -6.82], [-37.75, -6.85], [-37.5, -6.75], [-36.97, -6.97], [-36.75, -7.5], [-36.85, -7.75], [-36.75, -8.0], [-36.85, -8.25], [-36.75, -8.5], [-36.85, -8.75], [-36.75, -9.0], [-36.97, -9.53], [-37.5, -9.75], [-37.75, -9.65], [-37.82, -9.68], [-37.97, -10.03], [-38.5, -10.25], [-38.75, -10.15], [-39.0, -10.25], [-39.25, -10.15], [-39.5, -10.25], [-40.03, -10.03], [-40.25, -9.5], [-40.15, -9.25], [-40.18, -9.18], [-40.53, -9.03], [-40.75, -8.5], [-40.53, -7.97], [-40.0, -7.75]]]]}}, "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": {"2025-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-40.52999999999997, -9.03], [-40.75, -8.5], [-40.52999999999997, -7.97], [-40.0, -7.75], [-39.75, -7.85], [-39.5, -7.75], [-39.25, -7.85], [-39.0, -7.75], [-38.47000000000003, -7.97], [-38.31999999999999, -8.32], [-38.25, -8.35], [-38.0, -8.25], [-37.47000000000003, -8.47], [-37.25, -9.0], [-37.47000000000003, -9.53], [-37.81999999999999, -9.68], [-37.97000000000003, -10.03], [-38.5, -10.25], [-38.75, -10.15], [-39.0, -10.25], [-39.25, -10.15], [-39.5, -10.25], [-40.02999999999997, -10.03], [-40.25, -9.5], [-40.14999999999998, -9.25], [-40.18000000000001, -9.18], [-40.52999999999997, -9.03]]]]}, "2025-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-40.52999999999997, -9.03], [-40.75, -8.5], [-40.52999999999997, -7.97], [-40.0, -7.75], [-39.75, -7.85], [-39.5, -7.75], [-39.25, -7.85], [-39.18000000000001, -7.82], [-39.14999999999998, -7.75], [-39.25, -7.5], [-39.14999999999998, -7.25], [-39.25, -7.0], [-39.02999999999997, -6.47], [-38.5, -6.25], [-37.97000000000003, -6.47], [-37.81999999999999, -6.82], [-37.75, -6.85], [-37.5, -6.75], [-36.97000000000003, -6.97], [-36.75, -7.5], [-36.85000000000002, -7.75], [-36.75, -8.0], [-36.85000000000002, -8.25], [-36.75, -8.5], [-36.85000000000002, -8.75], [-36.75, -9.0], [-36.97000000000003, -9.53], [-37.5, -9.75], [-37.75, -9.65], [-37.81999999999999, -9.68], [-37.97000000000003, -10.03], [-38.5, -10.25], [-38.75, -10.15], [-39.0, -10.25], [-39.25, -10.15], [-39.5, -10.25], [-40.02999999999997, -10.03], [-40.25, -9.5], [-40.14999999999998, -9.25], [-40.18000000000001, -9.18], [-40.52999999999997, -9.03]]]]}, "2025-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-40.52999999999997, -9.03], [-40.75, -8.5], [-40.52999999999997, -7.97], [-40.0, -7.75], [-39.75, -7.85], [-39.5, -7.75], [-39.25, -7.85], [-39.18000000000001, -7.82], [-39.14999999999998, -7.75], [-39.25, -7.5], [-39.14999999999998, -7.25], [-39.25, -7.0], [-39.02999999999997, -6.47], [-38.5, -6.25], [-37.97000000000003, -6.47], [-37.81999999999999, -6.82], [-37.75, -6.85], [-37.5, -6.75], [-36.97000000000003, -6.97], [-36.75, -7.5], [-36.85000000000002, -7.75], [-36.75, -8.0], [-36.85000000000002, -8.25], [-36.75, -8.5], [-36.85000000000002, -8.75], [-36.75, -9.0], [-36.97000000000003, -9.53], [-37.5, -9.75], [-37.75, -9.65], [-37.81999999999999, -9.68], [-37.97000000000003, -10.03], [-38.5, -10.25], [-38.75, -10.15], [-39.0, -10.25], [-39.25, -10.15], [-39.5, -10.25], [-40.02999999999997, -10.03], [-40.25, -9.5], [-40.14999999999998, -9.25], [-40.18000000000001, -9.18], [-40.52999999999997, -9.03]]]]}, "2025-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.25, -8.0], [-39.14999999999998, -7.75], [-39.25, -7.5], [-39.14999999999998, -7.25], [-39.25, -7.0], [-39.02999999999997, -6.47], [-38.5, -6.25], [-37.97000000000003, -6.47], [-37.81999999999999, -6.82], [-37.75, -6.85], [-37.5, -6.75], [-36.97000000000003, -6.97], [-36.75, -7.5], [-36.85000000000002, -7.75], [-36.75, -8.0], [-36.85000000000002, -8.25], [-36.75, -8.5], [-36.85000000000002, -8.75], [-36.75, -9.0], [-36.97000000000003, -9.53], [-37.5, -9.75], [-37.75, -9.65], [-38.0, -9.75], [-38.52999999999997, -9.53], [-38.68000000000001, -9.18], [-39.02999999999997, -9.03], [-39.25, -8.5], [-39.14999999999998, -8.25], [-39.25, -8.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.9262812036156447}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2973941586500395}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.209582010905024, 22.319232165624214, 22.364031728108728, 22.192107137044275]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.37147165934249, 20.787071482340536, 21.0452654520671, 20.66071472167971]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3481119676605602, -1.269031480489175, -1.2600145144807204, -1.3701783818857602]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7215003648643687, -1.9262812036156447, -1.9159588441846722, -1.6686669692566625]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.761767927211539, -1.5090336803066613, -1.487693830279964, -1.567438434236711]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2934945641860978, -2.042274611264328, -2.0026344470566486, -1.9894090349519598]}}