{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:04.745807", "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": "2023-Feb-19_to_2023-Feb-22_293.5_-8.0"}, "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": 2023020000767}, "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": "February 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 22 2023"}, "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": 285478.77950937196}, "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": -8.0}, "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": 293.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "293.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 291.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 298.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -11.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -2.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-63.65, -9.25], [-63.68, -9.18], [-64.03, -9.03], [-64.18, -8.68], [-64.53, -8.53], [-64.68, -8.18], [-64.75, -8.15], [-65.0, -8.25], [-65.3, -8.12], [-65.47, -8.53], [-65.82, -8.68], [-65.97, -9.03], [-66.5, -9.25], [-67.03, -9.03], [-67.18, -8.68], [-67.53, -8.53], [-67.7, -8.12], [-68.0, -8.25], [-68.53, -8.03], [-68.75, -7.5], [-68.65, -7.25], [-68.68, -7.18], [-69.03, -7.03], [-69.25, -6.5], [-69.15, -6.25], [-69.25, -6.0], [-69.03, -5.47], [-68.5, -5.25], [-68.25, -5.35], [-68.0, -5.25], [-67.7, -5.38], [-67.53, -4.97], [-67.18, -4.82], [-67.03, -4.47], [-66.5, -4.25], [-66.25, -4.35], [-66.0, -4.25], [-65.5, -4.46], [-65.0, -4.25], [-64.75, -4.35], [-64.62, -4.3], [-64.75, -4.0], [-64.65, -3.75], [-64.68, -3.68], [-65.03, -3.53], [-65.18, -3.18], [-65.53, -3.03], [-65.75, -2.5], [-65.53, -1.97], [-65.0, -1.75], [-64.75, -1.85], [-64.5, -1.75], [-64.0, -1.96], [-63.5, -1.75], [-62.97, -1.97], [-62.75, -2.5], [-62.85, -2.75], [-62.82, -2.82], [-62.47, -2.97], [-62.25, -3.5], [-62.35, -3.75], [-62.25, -4.0], [-62.35, -4.25], [-62.32, -4.32], [-61.97, -4.47], [-61.75, -5.0], [-61.97, -5.53], [-62.32, -5.68], [-62.35, -5.75], [-62.25, -6.0], [-62.35, -6.25], [-62.32, -6.32], [-62.25, -6.35], [-62.0, -6.25], [-61.47, -6.47], [-61.25, -7.0], [-61.35, -7.25], [-61.25, -7.5], [-61.35, -7.75], [-61.25, -8.0], [-61.35, -8.25], [-61.25, -8.5], [-61.35, -8.75], [-61.32, -8.82], [-60.97, -8.97], [-60.75, -9.5], [-60.97, -10.03], [-61.5, -10.25], [-61.75, -10.15], [-62.0, -10.25], [-62.25, -10.15], [-62.37, -10.2], [-62.25, -10.5], [-62.35, -10.75], [-62.25, -11.0], [-62.47, -11.53], [-63.0, -11.75], [-63.53, -11.53], [-63.75, -11.0], [-63.65, -10.75], [-63.68, -10.68], [-64.03, -10.53], [-64.25, -10.0], [-64.03, -9.47], [-63.68, -9.32], [-63.65, -9.25]], [[-66.75, -6.65], [-66.82, -6.68], [-66.85, -6.75], [-66.82, -6.82], [-66.75, -6.85], [-66.68, -6.82], [-66.65, -6.75], [-66.68, -6.68], [-66.75, -6.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America", "South-American-Monsoon"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.25, -10.0], [-64.02999999999997, -9.47], [-63.68000000000001, -9.32], [-63.52999999999997, -8.97], [-63.0, -8.75], [-62.47000000000003, -8.97], [-62.25, -9.5], [-62.45999999999998, -10.0], [-62.25, -10.5], [-62.35000000000002, -10.75], [-62.25, -11.0], [-62.47000000000003, -11.53], [-63.0, -11.75], [-63.52999999999997, -11.53], [-63.75, -11.0], [-63.64999999999998, -10.75], [-63.68000000000001, -10.68], [-64.02999999999997, -10.53], [-64.25, -10.0]]], [[[-69.02999999999997, -5.47], [-68.5, -5.25], [-68.25, -5.35], [-68.0, -5.25], [-67.69999999999999, -5.38], [-67.52999999999997, -4.97], [-67.18, -4.82], [-67.02999999999997, -4.47], [-66.5, -4.25], [-66.25, -4.35], [-66.0, -4.25], [-65.5, -4.46], [-65.0, -4.25], [-64.75, -4.35], [-64.5, -4.25], [-63.97000000000003, -4.47], [-63.75, -5.0], [-63.85000000000002, -5.25], [-63.75, -5.5], [-63.97000000000003, -6.03], [-64.32, -6.18], [-64.35000000000002, -6.25], [-64.25, -6.5], [-64.35000000000002, -6.75], [-64.32, -6.82], [-63.97000000000003, -6.97], [-63.81999999999999, -7.32], [-63.47000000000003, -7.47], [-63.25, -8.0], [-63.47000000000003, -8.53], [-64.0, -8.75], [-64.52999999999997, -8.53], [-64.68, -8.18], [-64.75, -8.15], [-65.0, -8.25], [-65.30000000000001, -8.12], [-65.47000000000003, -8.53], [-65.82, -8.68], [-65.97000000000003, -9.03], [-66.5, -9.25], [-67.02999999999997, -9.03], [-67.18, -8.68], [-67.52999999999997, -8.53], [-67.69999999999999, -8.12], [-68.0, -8.25], [-68.52999999999997, -8.03], [-68.75, -7.5], [-68.64999999999998, -7.25], [-68.68, -7.18], [-69.02999999999997, -7.03], [-69.25, -6.5], [-69.14999999999998, -6.25], [-69.25, -6.0], [-69.02999999999997, -5.47]], [[-66.68, -6.82], [-66.64999999999998, -6.75], [-66.68, -6.68], [-66.75, -6.65], [-66.82, -6.68], [-66.85000000000002, -6.75], [-66.82, -6.82], [-66.75, -6.85], [-66.68, -6.82]]]]}, "2023-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.25, -6.0], [-69.02999999999997, -5.47], [-68.5, -5.25], [-68.25, -5.35], [-68.0, -5.25], [-67.69999999999999, -5.38], [-67.52999999999997, -4.97], [-67.18, -4.82], [-67.02999999999997, -4.47], [-66.5, -4.25], [-66.25, -4.35], [-66.0, -4.25], [-65.5, -4.46], [-65.0, -4.25], [-64.75, -4.35], [-64.62, -4.3], [-64.75, -4.0], [-64.64999999999998, -3.75], [-64.68, -3.68], [-65.02999999999997, -3.53], [-65.18, -3.18], [-65.52999999999997, -3.03], [-65.75, -2.5], [-65.52999999999997, -1.97], [-65.0, -1.75], [-64.75, -1.85], [-64.5, -1.75], [-64.0, -1.96], [-63.5, -1.75], [-62.97000000000003, -1.97], [-62.75, -2.5], [-62.85000000000002, -2.75], [-62.81999999999999, -2.82], [-62.47000000000003, -2.97], [-62.25, -3.5], [-62.35000000000002, -3.75], [-62.25, -4.0], [-62.35000000000002, -4.25], [-62.31999999999999, -4.32], [-61.97000000000003, -4.47], [-61.75, -5.0], [-61.97000000000003, -5.53], [-62.31999999999999, -5.68], [-62.35000000000002, -5.75], [-62.25, -6.0], [-62.35000000000002, -6.25], [-62.31999999999999, -6.32], [-62.25, -6.35], [-62.0, -6.25], [-61.47000000000003, -6.47], [-61.25, -7.0], [-61.35000000000002, -7.25], [-61.25, -7.5], [-61.35000000000002, -7.75], [-61.25, -8.0], [-61.35000000000002, -8.25], [-61.25, -8.5], [-61.35000000000002, -8.75], [-61.31999999999999, -8.82], [-60.97000000000003, -8.97], [-60.75, -9.5], [-60.97000000000003, -10.03], [-61.5, -10.25], [-61.75, -10.15], [-62.0, -10.25], [-62.25, -10.15], [-62.370000000000005, -10.2], [-62.25, -10.5], [-62.35000000000002, -10.75], [-62.25, -11.0], [-62.47000000000003, -11.53], [-63.0, -11.75], [-63.52999999999997, -11.53], [-63.75, -11.0], [-63.64999999999998, -10.75], [-63.68000000000001, -10.68], [-64.02999999999997, -10.53], [-64.25, -10.0], [-64.02999999999997, -9.47], [-63.68000000000001, -9.32], [-63.64999999999998, -9.25], [-63.68000000000001, -9.18], [-64.02999999999997, -9.03], [-64.18, -8.68], [-64.52999999999997, -8.53], [-64.68, -8.18], [-64.75, -8.15], [-65.0, -8.25], [-65.30000000000001, -8.12], [-65.47000000000003, -8.53], [-65.82, -8.68], [-65.97000000000003, -9.03], [-66.5, -9.25], [-67.02999999999997, -9.03], [-67.18, -8.68], [-67.52999999999997, -8.53], [-67.69999999999999, -8.12], [-68.0, -8.25], [-68.52999999999997, -8.03], [-68.75, -7.5], [-68.64999999999998, -7.25], [-68.68, -7.18], [-69.02999999999997, -7.03], [-69.25, -6.5], [-69.14999999999998, -6.25], [-69.25, -6.0]], [[-66.75, -6.85], [-66.68, -6.82], [-66.64999999999998, -6.75], [-66.68, -6.68], [-66.75, -6.65], [-66.82, -6.68], [-66.85000000000002, -6.75], [-66.82, -6.82], [-66.75, -6.85]]]]}, "2023-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.25, -6.0], [-69.02999999999997, -5.47], [-68.5, -5.25], [-68.25, -5.35], [-68.0, -5.25], [-67.69999999999999, -5.38], [-67.52999999999997, -4.97], [-67.18, -4.82], [-67.02999999999997, -4.47], [-66.5, -4.25], [-66.25, -4.35], [-66.0, -4.25], [-65.5, -4.46], [-65.0, -4.25], [-64.75, -4.35], [-64.62, -4.3], [-64.75, -4.0], [-64.64999999999998, -3.75], [-64.68, -3.68], [-65.02999999999997, -3.53], [-65.18, -3.18], [-65.52999999999997, -3.03], [-65.75, -2.5], [-65.52999999999997, -1.97], [-65.0, -1.75], [-64.75, -1.85], [-64.5, -1.75], [-64.0, -1.96], [-63.5, -1.75], [-62.97000000000003, -1.97], [-62.75, -2.5], [-62.85000000000002, -2.75], [-62.81999999999999, -2.82], [-62.47000000000003, -2.97], [-62.25, -3.5], [-62.35000000000002, -3.75], [-62.25, -4.0], [-62.35000000000002, -4.25], [-62.31999999999999, -4.32], [-61.97000000000003, -4.47], [-61.75, -5.0], [-61.97000000000003, -5.53], [-62.31999999999999, -5.68], [-62.35000000000002, -5.75], [-62.25, -6.0], [-62.35000000000002, -6.25], [-62.31999999999999, -6.32], [-62.25, -6.35], [-62.0, -6.25], [-61.47000000000003, -6.47], [-61.25, -7.0], [-61.35000000000002, -7.25], [-61.25, -7.5], [-61.35000000000002, -7.75], [-61.25, -8.0], [-61.35000000000002, -8.25], [-61.25, -8.5], [-61.35000000000002, -8.75], [-61.31999999999999, -8.82], [-60.97000000000003, -8.97], [-60.75, -9.5], [-60.97000000000003, -10.03], [-61.5, -10.25], [-61.75, -10.15], [-62.0, -10.25], [-62.25, -10.15], [-62.370000000000005, -10.2], [-62.25, -10.5], [-62.35000000000002, -10.75], [-62.25, -11.0], [-62.47000000000003, -11.53], [-63.0, -11.75], [-63.52999999999997, -11.53], [-63.75, -11.0], [-63.64999999999998, -10.75], [-63.68000000000001, -10.68], [-64.02999999999997, -10.53], [-64.25, -10.0], [-64.02999999999997, -9.47], [-63.68000000000001, -9.32], [-63.64999999999998, -9.25], [-63.68000000000001, -9.18], [-64.02999999999997, -9.03], [-64.18, -8.68], [-64.52999999999997, -8.53], [-64.68, -8.18], [-64.75, -8.15], [-65.0, -8.25], [-65.30000000000001, -8.12], [-65.47000000000003, -8.53], [-65.82, -8.68], [-65.97000000000003, -9.03], [-66.5, -9.25], [-67.02999999999997, -9.03], [-67.18, -8.68], [-67.52999999999997, -8.53], [-67.69999999999999, -8.12], [-68.0, -8.25], [-68.52999999999997, -8.03], [-68.75, -7.5], [-68.64999999999998, -7.25], [-68.68, -7.18], [-69.02999999999997, -7.03], [-69.25, -6.5], [-69.14999999999998, -6.25], [-69.25, -6.0]], [[-66.75, -6.85], [-66.68, -6.82], [-66.64999999999998, -6.75], [-66.68, -6.68], [-66.75, -6.65], [-66.82, -6.68], [-66.85000000000002, -6.75], [-66.82, -6.82], [-66.75, -6.85]]]]}, "2023-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.75, -6.0], [-68.52999999999997, -5.47], [-68.0, -5.25], [-67.69999999999999, -5.38], [-67.52999999999997, -4.97], [-67.0, -4.75], [-66.47000000000003, -4.97], [-66.32, -5.32], [-66.25, -5.35], [-66.0, -5.25], [-65.75, -5.35], [-65.68, -5.32], [-65.52999999999997, -4.97], [-65.18, -4.82], [-65.02999999999997, -4.47], [-64.62, -4.3], [-64.75, -4.0], [-64.64999999999998, -3.75], [-64.68, -3.68], [-65.02999999999997, -3.53], [-65.18, -3.18], [-65.52999999999997, -3.03], [-65.75, -2.5], [-65.52999999999997, -1.97], [-65.0, -1.75], [-64.75, -1.85], [-64.5, -1.75], [-64.0, -1.96], [-63.5, -1.75], [-62.97000000000003, -1.97], [-62.75, -2.5], [-62.85000000000002, -2.75], [-62.81999999999999, -2.82], [-62.47000000000003, -2.97], [-62.25, -3.5], [-62.35000000000002, -3.75], [-62.25, -4.0], [-62.35000000000002, -4.25], [-62.31999999999999, -4.32], [-61.97000000000003, -4.47], [-61.75, -5.0], [-61.97000000000003, -5.53], [-62.31999999999999, -5.68], [-62.35000000000002, -5.75], [-62.25, -6.0], [-62.35000000000002, -6.25], [-62.31999999999999, -6.32], [-62.25, -6.35], [-62.0, -6.25], [-61.47000000000003, -6.47], [-61.25, -7.0], [-61.35000000000002, -7.25], [-61.25, -7.5], [-61.35000000000002, -7.75], [-61.25, -8.0], [-61.35000000000002, -8.25], [-61.25, -8.5], [-61.35000000000002, -8.75], [-61.31999999999999, -8.82], [-60.97000000000003, -8.97], [-60.75, -9.5], [-60.97000000000003, -10.03], [-61.5, -10.25], [-61.75, -10.15], [-62.0, -10.25], [-62.25, -10.15], [-62.5, -10.25], [-63.02999999999997, -10.03], [-63.18000000000001, -9.68], [-63.52999999999997, -9.53], [-63.68000000000001, -9.18], [-64.02999999999997, -9.03], [-64.18, -8.68], [-64.52999999999997, -8.53], [-64.75, -8.0], [-64.62, -7.7], [-65.02999999999997, -7.53], [-65.25, -7.0], [-65.45999999999998, -7.5], [-65.25, -8.0], [-65.47000000000003, -8.53], [-65.82, -8.68], [-65.97000000000003, -9.03], [-66.5, -9.25], [-67.02999999999997, -9.03], [-67.25, -8.5], [-67.14999999999998, -8.25], [-67.25, -8.0], [-67.14999999999998, -7.75], [-67.19999999999999, -7.62], [-67.5, -7.75], [-68.02999999999997, -7.53], [-68.18, -7.18], [-68.52999999999997, -7.03], [-68.75, -6.5], [-68.64999999999998, -6.25], [-68.75, -6.0]], [[-65.14999999999998, -6.75], [-65.19999999999999, -6.62], [-65.37, -6.7], [-65.25, -7.0], [-65.14999999999998, -6.75]], [[-66.80000000000001, -6.88], [-66.68, -6.82], [-66.62, -6.7], [-66.75, -6.65], [-66.82, -6.68], [-66.85000000000002, -6.75], [-66.80000000000001, -6.88]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.88139337228597}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6677355826623306}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.03862129005688, 23.636246895749196, 24.322359944524976, 24.485429436385857]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.734737962230895, 22.831851392446254, 23.519160297164092, 23.795999517277835]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.642069324841185, -2.159494679841243, -1.4475470782099102, -1.3264762191310924]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.878748922219927, -2.88139337228597, -2.2567640424805973, -1.7833885554882727]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9264432915105032, -2.475686715990768, -1.6812850071613126, -1.6369809335042447]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.2924535455060706, -3.4620475311966423, -2.503065851322185, -2.4502213014468066]}}