{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:20.038381", "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-Dec-16_to_2025-Dec-19_299.0_-16.5"}, "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": 2025120000576}, "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 16 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 19 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": 62383.917231278436}, "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": ["Bolivia, Plurinational State of", "Brazil"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": -16.5}, "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": 299.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "299.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 298.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 301.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-62.18, -15.82], [-62.03, -15.47], [-61.5, -15.25], [-61.25, -15.35], [-61.0, -15.25], [-60.75, -15.35], [-60.68, -15.32], [-60.54, -15.0], [-60.75, -14.5], [-60.53, -13.97], [-60.0, -13.75], [-59.75, -13.85], [-59.5, -13.75], [-58.97, -13.97], [-58.82, -14.32], [-58.75, -14.35], [-58.5, -14.25], [-57.97, -14.47], [-57.75, -15.0], [-57.85, -15.25], [-57.75, -15.5], [-57.97, -16.03], [-58.5, -16.25], [-58.93, -16.07], [-58.75, -16.5], [-58.97, -17.03], [-59.5, -17.25], [-59.75, -17.15], [-59.82, -17.18], [-59.97, -17.53], [-60.32, -17.68], [-60.47, -18.03], [-61.0, -18.25], [-61.53, -18.03], [-61.68, -17.68], [-62.03, -17.53], [-62.18, -17.18], [-62.53, -17.03], [-62.75, -16.5], [-62.53, -15.97], [-62.18, -15.82]], [[-59.32, -15.82], [-59.07, -15.93], [-59.18, -15.68], [-59.25, -15.65], [-59.32, -15.68], [-59.35, -15.75], [-59.32, -15.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["South-American-Monsoon"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.52999999999997, -17.03], [-62.75, -16.5], [-62.52999999999997, -15.97], [-62.18000000000001, -15.82], [-62.02999999999997, -15.47], [-61.5, -15.25], [-61.25, -15.35], [-61.0, -15.25], [-60.75, -15.35], [-60.68000000000001, -15.32], [-60.52999999999997, -14.97], [-60.0, -14.75], [-59.47000000000003, -14.97], [-59.25, -15.5], [-59.35000000000002, -15.75], [-59.31999999999999, -15.82], [-58.97000000000003, -15.97], [-58.75, -16.5], [-58.97000000000003, -17.03], [-59.5, -17.25], [-59.75, -17.15], [-59.81999999999999, -17.18], [-59.97000000000003, -17.53], [-60.31999999999999, -17.68], [-60.47000000000003, -18.03], [-61.0, -18.25], [-61.52999999999997, -18.03], [-61.68000000000001, -17.68], [-62.02999999999997, -17.53], [-62.18000000000001, -17.18], [-62.52999999999997, -17.03]]]]}, "2025-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.52999999999997, -17.03], [-62.75, 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[-59.31999999999999, -15.68], [-59.35000000000002, -15.75], [-59.31999999999999, -15.82], [-59.06999999999999, -15.93], [-59.18000000000001, -15.68], [-59.25, -15.65]]]]}, "2025-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.52999999999997, -17.03], [-62.75, -16.5], [-62.52999999999997, -15.97], [-62.18000000000001, -15.82], [-62.02999999999997, -15.47], [-61.5, -15.25], [-61.25, -15.35], [-61.0, -15.25], [-60.75, -15.35], [-60.68000000000001, -15.32], [-60.54000000000002, -15.0], [-60.75, -14.5], [-60.52999999999997, -13.97], [-60.0, -13.75], [-59.75, -13.85], [-59.5, -13.75], [-58.97000000000003, -13.97], [-58.81999999999999, -14.32], [-58.75, -14.35], [-58.5, -14.25], [-57.97000000000003, -14.47], [-57.75, -15.0], [-57.85000000000002, -15.25], [-57.75, -15.5], [-57.97000000000003, -16.03], [-58.5, -16.25], [-58.93000000000001, -16.07], [-58.75, -16.5], [-58.97000000000003, -17.03], [-59.5, -17.25], [-59.75, -17.15], [-59.81999999999999, -17.18], 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[-60.02999999999997, -15.53], [-60.18000000000001, -15.18], [-60.52999999999997, -15.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.273893171835084}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.9737910758887893}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.572709994845923, 22.131551421634754, 24.48730191427569, 24.086678653293234]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.801545715332054, 21.10395965576174, 23.255724843343103, 23.310013071696005]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8016426124643963, -4.044578443885909, -1.7354832868955414, -1.490483707936221]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.273893171835084, -5.058816508906716, -2.2038946853585912, -1.662396847870184]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.7890275526677204, -3.3483868908225918, -1.4896736984539938, -1.428714990025356]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.745762981884381, -4.012472638614575, -2.11677210337268, -1.555346854057836]}}