{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:58.072891", "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": "2022-May-04_to_2022-May-07_306.0_-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": 2022050000226}, "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": "May 04 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 07 2022"}, "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": 229173.30806331965}, "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": -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": 306.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 310.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-51.0, -18.75], [-50.75, -18.85], [-50.68, -18.82], [-50.53, -18.47], [-50.0, -18.25], [-49.47, -18.47], [-49.25, -19.0], [-49.35, -19.25], [-49.25, -19.5], [-49.35, -19.75], [-49.25, -20.0], [-49.47, -20.53], [-49.87, -20.7], [-49.75, -21.0], [-49.97, -21.53], [-50.5, -21.75], [-51.03, -21.53], [-51.18, -21.18], [-51.25, -21.15], [-51.5, -21.25], [-52.03, -21.03], [-52.18, -20.68], [-52.25, -20.65], [-52.5, -20.75], [-52.75, -20.65], [-53.0, -20.75], [-53.25, -20.65], [-53.5, -20.75], [-54.03, -20.53], [-54.18, -20.18], [-54.25, -20.15], [-54.5, -20.25], [-55.03, -20.03], [-55.18, -19.68], [-55.53, -19.53], [-55.68, -19.18], [-56.03, -19.03], [-56.25, -18.5], [-56.03, -17.97], [-55.68, -17.82], [-55.65, -17.75], [-55.68, -17.68], [-56.03, -17.53], [-56.18, -17.18], [-56.25, -17.15], [-56.5, -17.25], [-56.75, -17.15], [-56.82, -17.18], [-56.97, -17.53], [-57.5, -17.75], [-58.03, -17.53], [-58.25, -17.0], [-58.15, -16.75], [-58.25, -16.5], [-58.03, -15.97], [-57.68, -15.82], [-57.53, -15.47], [-57.0, -15.25], [-56.7, -15.38], [-56.53, -14.97], [-56.0, -14.75], [-55.5, -14.96], [-55.0, -14.75], [-54.47, -14.97], [-54.32, -15.32], [-54.0, -15.46], [-53.5, -15.25], [-53.25, -15.35], [-53.0, -15.25], [-52.47, -15.47], [-52.32, -15.82], [-51.97, -15.97], [-51.75, -16.5], [-51.85, -16.75], [-51.82, -16.82], [-51.47, -16.97], [-51.25, -17.5], [-51.35, -17.75], [-51.25, -18.0], [-51.46, -18.5], [-51.32, -18.82], [-51.25, -18.85], [-51.0, -18.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America", "South-American-Monsoon", "S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.25, -16.5], [-58.02999999999997, -15.97], [-57.68000000000001, -15.82], [-57.52999999999997, -15.47], [-57.0, -15.25], [-56.69999999999999, -15.38], [-56.52999999999997, -14.97], [-56.0, -14.75], [-55.5, -14.96], [-55.0, -14.75], [-54.47000000000003, -14.97], [-54.31999999999999, -15.32], [-54.0, -15.46], [-53.5, -15.25], [-53.25, -15.35], [-53.0, -15.25], [-52.47000000000003, -15.47], [-52.31999999999999, -15.82], [-51.97000000000003, -15.97], [-51.75, -16.5], [-51.85000000000002, -16.75], [-51.81999999999999, -16.82], [-51.47000000000003, -16.97], [-51.25, -17.5], [-51.35000000000002, -17.75], [-51.25, -18.0], [-51.45999999999998, -18.5], [-51.31999999999999, -18.82], [-51.25, -18.85], [-51.0, -18.75], [-50.75, -18.85], [-50.68000000000001, -18.82], [-50.52999999999997, -18.47], [-50.0, -18.25], [-49.47000000000003, -18.47], [-49.25, -19.0], [-49.35000000000002, -19.25], [-49.25, -19.5], [-49.35000000000002, -19.75], [-49.25, -20.0], [-49.47000000000003, -20.53], [-49.870000000000005, -20.7], [-49.75, -21.0], [-49.97000000000003, -21.53], [-50.5, -21.75], [-51.02999999999997, -21.53], [-51.18000000000001, -21.18], [-51.25, -21.15], [-51.5, -21.25], [-52.02999999999997, -21.03], [-52.18000000000001, -20.68], [-52.25, -20.65], [-52.5, -20.75], [-52.75, -20.65], [-53.0, -20.75], [-53.25, -20.65], [-53.5, -20.75], [-54.02999999999997, -20.53], [-54.18000000000001, -20.18], [-54.25, -20.15], [-54.5, -20.25], [-55.02999999999997, -20.03], [-55.18000000000001, -19.68], [-55.52999999999997, -19.53], [-55.68000000000001, -19.18], [-56.02999999999997, -19.03], [-56.25, -18.5], [-56.02999999999997, -17.97], [-55.68000000000001, -17.82], [-55.64999999999998, -17.75], [-55.68000000000001, -17.68], [-56.02999999999997, -17.53], [-56.18000000000001, -17.18], [-56.25, -17.15], [-56.5, -17.25], [-56.75, -17.15], [-56.81999999999999, -17.18], [-56.97000000000003, -17.53], [-57.5, -17.75], [-58.02999999999997, -17.53], [-58.25, -17.0], [-58.14999999999998, -16.75], [-58.25, -16.5]]]]}, "2022-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.25, -16.5], [-58.02999999999997, -15.97], [-57.68000000000001, -15.82], [-57.52999999999997, -15.47], [-57.0, -15.25], [-56.69999999999999, -15.38], [-56.52999999999997, -14.97], [-56.0, -14.75], [-55.5, -14.96], [-55.0, -14.75], [-54.47000000000003, -14.97], [-54.31999999999999, -15.32], [-54.0, -15.46], [-53.5, -15.25], [-53.25, -15.35], [-53.0, -15.25], [-52.47000000000003, -15.47], [-52.31999999999999, -15.82], [-51.97000000000003, -15.97], [-51.75, -16.5], [-51.85000000000002, -16.75], [-51.81999999999999, -16.82], [-51.47000000000003, -16.97], [-51.25, -17.5], [-51.35000000000002, -17.75], [-51.25, -18.0], [-51.45999999999998, -18.5], [-51.31999999999999, -18.82], [-51.25, -18.85], [-51.0, -18.75], [-50.75, -18.85], [-50.68000000000001, -18.82], [-50.52999999999997, -18.47], [-50.0, -18.25], [-49.47000000000003, -18.47], [-49.25, -19.0], [-49.35000000000002, -19.25], [-49.25, -19.5], [-49.35000000000002, -19.75], [-49.25, -20.0], [-49.47000000000003, -20.53], [-49.870000000000005, -20.7], [-49.75, -21.0], [-49.97000000000003, -21.53], [-50.5, -21.75], [-51.02999999999997, -21.53], [-51.18000000000001, -21.18], [-51.25, -21.15], [-51.5, -21.25], [-52.02999999999997, -21.03], [-52.18000000000001, -20.68], [-52.25, -20.65], [-52.5, -20.75], [-52.75, -20.65], [-53.0, -20.75], [-53.25, -20.65], [-53.5, -20.75], [-54.02999999999997, -20.53], [-54.18000000000001, -20.18], [-54.25, -20.15], [-54.5, -20.25], [-55.02999999999997, -20.03], [-55.18000000000001, -19.68], [-55.52999999999997, -19.53], [-55.68000000000001, -19.18], [-56.02999999999997, -19.03], [-56.25, -18.5], [-56.02999999999997, -17.97], [-55.68000000000001, -17.82], [-55.64999999999998, -17.75], [-55.68000000000001, -17.68], [-56.02999999999997, -17.53], [-56.18000000000001, -17.18], [-56.25, -17.15], [-56.5, -17.25], [-56.75, -17.15], [-56.81999999999999, -17.18], [-56.97000000000003, -17.53], [-57.5, -17.75], [-58.02999999999997, -17.53], [-58.25, -17.0], [-58.14999999999998, -16.75], [-58.25, -16.5]]]]}, "2022-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.25, -16.5], [-58.02999999999997, -15.97], [-57.68000000000001, -15.82], [-57.52999999999997, -15.47], [-57.0, -15.25], [-56.69999999999999, -15.38], [-56.52999999999997, -14.97], [-56.0, -14.75], [-55.5, -14.96], [-55.0, -14.75], [-54.47000000000003, -14.97], [-54.31999999999999, -15.32], [-54.0, -15.46], [-53.5, -15.25], [-53.25, -15.35], [-53.0, -15.25], [-52.47000000000003, -15.47], [-52.31999999999999, -15.82], [-51.97000000000003, -15.97], [-51.75, -16.5], [-51.85000000000002, -16.75], [-51.81999999999999, -16.82], [-51.47000000000003, -16.97], [-51.25, -17.5], [-51.35000000000002, -17.75], [-51.25, -18.0], [-51.45999999999998, -18.5], [-51.31999999999999, -18.82], [-51.25, -18.85], [-51.0, -18.75], [-50.75, -18.85], [-50.68000000000001, -18.82], [-50.52999999999997, -18.47], [-50.0, -18.25], [-49.47000000000003, -18.47], [-49.25, -19.0], [-49.35000000000002, -19.25], [-49.25, -19.5], [-49.35000000000002, -19.75], [-49.25, -20.0], [-49.47000000000003, -20.53], [-49.870000000000005, -20.7], [-49.75, -21.0], [-49.97000000000003, -21.53], [-50.5, -21.75], [-51.02999999999997, -21.53], [-51.18000000000001, -21.18], [-51.25, -21.15], [-51.5, -21.25], [-52.02999999999997, -21.03], [-52.18000000000001, -20.68], [-52.25, -20.65], [-52.5, -20.75], [-52.75, -20.65], [-53.0, -20.75], [-53.25, -20.65], [-53.5, -20.75], [-54.02999999999997, -20.53], [-54.18000000000001, -20.18], [-54.25, -20.15], [-54.5, -20.25], [-55.02999999999997, -20.03], [-55.18000000000001, -19.68], [-55.52999999999997, -19.53], [-55.68000000000001, -19.18], [-56.02999999999997, -19.03], [-56.25, -18.5], [-56.02999999999997, -17.97], [-55.68000000000001, -17.82], [-55.64999999999998, -17.75], [-55.68000000000001, -17.68], [-56.02999999999997, -17.53], [-56.18000000000001, -17.18], [-56.25, -17.15], [-56.5, -17.25], [-56.75, -17.15], [-56.81999999999999, -17.18], [-56.97000000000003, -17.53], [-57.5, -17.75], [-58.02999999999997, -17.53], [-58.25, -17.0], [-58.14999999999998, -16.75], [-58.25, -16.5]]]]}, "2022-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.02999999999997, -20.03], [-52.25, -19.5], [-52.02999999999997, -18.97], [-51.5, -18.75], [-51.25, -18.85], [-51.0, -18.75], [-50.47000000000003, -18.97], [-50.25, -19.5], [-50.47000000000003, -20.03], [-51.0, -20.25], [-51.25, -20.15], [-51.5, -20.25], [-52.02999999999997, -20.03]]], [[[-54.52999999999997, -17.47], [-54.18000000000001, -17.32], [-54.14999999999998, -17.25], [-54.18000000000001, -17.18], [-54.25, -17.15], [-54.5, -17.25], [-55.02999999999997, -17.03], [-55.25, -16.5], [-55.02999999999997, -15.97], [-54.5, -15.75], [-54.25, -15.85], [-54.0, -15.75], [-53.47000000000003, -15.97], [-53.31999999999999, -16.32], [-53.25, -16.35], [-53.0, -16.25], [-52.47000000000003, -16.47], [-52.31999999999999, -16.82], [-51.97000000000003, -16.97], [-51.75, -17.5], [-51.85000000000002, -17.75], [-51.75, -18.0], [-51.97000000000003, -18.53], [-52.5, -18.75], [-52.80000000000001, -18.62], [-52.97000000000003, -19.03], [-53.5, -19.25], [-53.75, -19.15], [-54.0, -19.25], [-54.52999999999997, -19.03], [-54.75, -18.5], [-54.64999999999998, -18.25], [-54.75, -18.0], [-54.52999999999997, -17.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.103441934151533}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.9319543982073615}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.958425453830273, 17.761336725246053, 19.150083153027595, 20.06140110475792]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.622832974563437, 15.294442875815264, 16.665278745467504, 18.894925413974306]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.830526152550671, -5.883396406819025, -4.3484144428817615, -3.199874648616406]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.103441934151533, -6.946916378179992, -5.637970998826688, -4.002566985108672]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2482146753584944, -2.7265744470440114, -1.9560005302515486, -1.602513353677013]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.069079128212389, -3.514747503308864, -2.523277297136385, -1.7544805430095198]}}