{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:19.106250", "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": "2021-Sep-01_to_2021-Sep-05_311.0_-2.5"}, "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": 2021090000064}, "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": "September 01 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 05 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 74108.79491314726}, "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": -2.5}, "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": 311.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "311.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 309.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 312.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -4.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -1.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-47.75, -3.5], [-47.85, -3.75], [-47.75, -4.0], [-47.97, -4.53], [-48.5, -4.75], [-48.75, -4.65], [-49.0, -4.75], [-49.53, -4.53], [-49.68, -4.18], [-50.03, -4.03], [-50.18, -3.68], [-50.53, -3.53], [-50.68, -3.18], [-51.03, -3.03], [-51.25, -2.5], [-51.15, -2.25], [-51.25, -2.0], [-51.03, -1.47], [-50.68, -1.32], [-50.53, -0.97], [-50.18, -0.82], [-50.03, -0.47], [-49.5, -0.25], [-49.25, -0.35], [-49.0, -0.25], [-48.47, -0.47], [-48.25, -1.0], [-48.37, -1.3], [-48.25, -1.35], [-48.0, -1.25], [-47.47, -1.47], [-47.32, -1.82], [-46.97, -1.97], [-46.75, -2.5], [-46.97, -3.03], [-47.5, -3.25], [-47.75, -3.15], [-47.87, -3.2], [-47.75, -3.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America", "N.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.25, -3.0], [-50.02999999999997, -2.47], [-49.68000000000001, -2.32], [-49.52999999999997, -1.97], [-49.0, -1.75], [-48.47000000000003, -1.97], [-48.25, -2.5], [-48.35000000000002, -2.75], [-48.25, -3.0], [-48.35000000000002, -3.25], [-48.25, -3.5], [-48.35000000000002, -3.75], [-48.25, -4.0], [-48.47000000000003, -4.53], [-49.0, -4.75], [-49.52999999999997, -4.53], [-49.68000000000001, -4.18], [-50.02999999999997, -4.03], [-50.25, -3.5], [-50.14999999999998, -3.25], [-50.25, -3.0]]]]}, "2021-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-51.25, -2.0], [-51.02999999999997, -1.47], [-50.5, -1.25], [-50.25, -1.35], [-50.0, -1.25], [-49.75, -1.35], [-49.5, -1.25], [-49.25, -1.35], [-49.0, -1.25], [-48.47000000000003, -1.47], [-48.25, -2.0], [-48.35000000000002, -2.25], [-48.25, -2.5], [-48.35000000000002, -2.75], [-48.31999999999999, -2.82], [-47.97000000000003, -2.97], [-47.75, -3.5], [-47.85000000000002, -3.75], [-47.75, -4.0], [-47.97000000000003, -4.53], [-48.5, -4.75], [-48.75, -4.65], [-49.0, -4.75], [-49.52999999999997, -4.53], [-49.68000000000001, -4.18], [-50.02999999999997, -4.03], [-50.18000000000001, -3.68], [-50.52999999999997, -3.53], [-50.68000000000001, -3.18], [-51.02999999999997, -3.03], [-51.25, -2.5], [-51.14999999999998, -2.25], [-51.25, -2.0]]]]}, "2021-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-51.25, -2.0], [-51.02999999999997, -1.47], [-50.68000000000001, -1.32], [-50.52999999999997, -0.97], [-50.18000000000001, -0.82], [-50.02999999999997, -0.47], [-49.5, -0.25], [-49.25, -0.35], [-49.0, -0.25], [-48.47000000000003, -0.47], [-48.25, -1.0], [-48.370000000000005, -1.3], [-48.25, -1.35], [-48.0, -1.25], [-47.47000000000003, -1.47], [-47.31999999999999, -1.82], [-46.97000000000003, -1.97], [-46.75, -2.5], [-46.97000000000003, -3.03], [-47.5, -3.25], [-47.75, -3.15], [-47.870000000000005, -3.2], [-47.75, -3.5], [-47.85000000000002, -3.75], [-47.75, -4.0], [-47.97000000000003, -4.53], [-48.5, -4.75], [-48.75, -4.65], [-49.0, -4.75], [-49.52999999999997, -4.53], [-49.68000000000001, -4.18], [-50.02999999999997, -4.03], [-50.18000000000001, -3.68], [-50.52999999999997, -3.53], [-50.68000000000001, -3.18], [-51.02999999999997, -3.03], [-51.25, -2.5], [-51.14999999999998, -2.25], [-51.25, -2.0]]]]}, "2021-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-51.25, -2.0], [-51.02999999999997, -1.47], [-50.68000000000001, -1.32], [-50.52999999999997, -0.97], [-50.18000000000001, -0.82], [-50.02999999999997, -0.47], [-49.5, -0.25], [-49.25, -0.35], [-49.0, -0.25], [-48.47000000000003, -0.47], [-48.25, -1.0], [-48.370000000000005, -1.3], [-48.25, -1.35], [-48.0, -1.25], [-47.47000000000003, -1.47], [-47.31999999999999, -1.82], [-46.97000000000003, -1.97], [-46.75, -2.5], [-46.97000000000003, -3.03], [-47.5, -3.25], [-47.75, -3.15], [-47.870000000000005, -3.2], [-47.75, -3.5], [-47.85000000000002, -3.75], [-47.75, -4.0], [-47.97000000000003, -4.53], [-48.5, -4.75], [-48.75, -4.65], [-49.0, -4.75], [-49.52999999999997, -4.53], [-49.68000000000001, 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[-50.64999999999998, -2.75], [-50.75, -2.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1476509297161783}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6219268667152535}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.07101190328251, 26.89439636641322, 25.946137510064716, 26.69674539859153, 27.122768248918646]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.96762624542714, 26.50311389837509, 24.887014310591894, 26.00780083359524, 26.7664053128604]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3670490353232196, -1.4385335192734452, -2.2821124186696315, -1.5430515168517662, -1.0289340977927388]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.4284013398590787, -2.0359991032032667, -3.1476509297161783, -2.018260084196527, -1.355756630695737]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.578133210969107, -1.8301251325213825, -3.167418945873795, -2.1346295813154166, -1.5203738570934657]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6973621099079905, -2.3365487754737475, -4.4712268217774005, -2.638928641957321, -1.962297758488478]}}