{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:37.071058", "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-Mar-01_to_2023-Mar-08_299.5_4.0"}, "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": 2023030000066}, "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": "March 01 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 08 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 157113.4776731529}, "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", "Guyana", "Venezuela, Bolivarian Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 4.0}, "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": 299.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "299.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 295.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 300.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.5}, "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": [[[[-61.0, 5.75], [-60.47, 5.53], [-60.32, 5.18], [-60.25, 5.15], [-60.0, 5.25], [-59.75, 5.15], [-59.5, 5.25], [-58.97, 5.03], [-58.75, 4.5], [-58.85, 4.25], [-58.75, 4.0], [-58.85, 3.75], [-58.75, 3.5], [-58.85, 3.25], [-58.75, 3.0], [-58.85, 2.75], [-58.75, 2.5], [-58.97, 1.97], [-59.5, 1.75], [-59.75, 1.85], [-60.0, 1.75], [-60.53, 1.97], [-60.68, 2.32], [-61.03, 2.47], [-61.18, 2.82], [-61.25, 2.85], [-61.5, 2.75], [-61.8, 2.88], [-61.97, 2.47], [-62.5, 2.25], [-63.03, 2.47], [-63.18, 2.82], [-63.25, 2.85], [-63.5, 2.75], [-63.75, 2.85], [-64.0, 2.75], [-64.25, 2.85], [-64.5, 2.75], [-65.03, 2.97], [-65.25, 3.5], [-65.15, 3.75], [-65.25, 4.0], [-65.03, 4.53], [-64.68, 4.68], [-64.65, 4.75], [-64.75, 5.0], [-64.65, 5.25], [-64.75, 5.5], [-64.53, 6.03], [-64.18, 6.18], [-64.15, 6.25], [-64.25, 6.5], [-64.15, 6.75], [-64.25, 7.0], [-64.03, 7.53], [-63.5, 7.75], [-62.97, 7.53], [-62.82, 7.18], [-62.75, 7.15], [-62.68, 7.18], [-62.53, 7.53], [-62.0, 7.75], [-61.75, 7.65], [-61.5, 7.75], [-60.97, 7.53], [-60.75, 7.0], [-60.85, 6.75], [-60.75, 6.5], [-60.97, 5.97], [-61.5, 5.75], [-61.25, 5.65], [-61.0, 5.75]], [[-61.75, 5.85], [-61.82, 5.82], [-61.85, 5.75], [-61.8, 5.62], [-61.5, 5.75], [-61.75, 5.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.02999999999997, 4.53], [-64.68, 4.68], [-64.64999999999998, 4.75], [-64.75, 5.0], [-64.64999999999998, 5.25], [-64.75, 5.5], [-64.52999999999997, 6.03], [-64.0, 6.25], [-63.47000000000003, 6.03], [-63.25, 5.5], [-63.35000000000002, 5.25], [-63.31999999999999, 5.18], [-62.97000000000003, 5.03], [-62.81999999999999, 4.68], [-62.75, 4.65], [-62.68000000000001, 4.68], [-62.52999999999997, 5.03], [-62.0, 5.25], [-61.47000000000003, 5.03], [-61.31999999999999, 4.68], [-61.25, 4.65], [-61.18000000000001, 4.68], [-61.02999999999997, 5.03], [-60.5, 5.25], [-59.97000000000003, 5.03], [-59.81999999999999, 4.68], [-59.47000000000003, 4.53], [-59.25, 4.0], [-59.47000000000003, 3.47], [-60.0, 3.25], [-60.25, 3.35], [-60.31999999999999, 3.32], [-60.47000000000003, 2.97], [-61.0, 2.75], [-61.52999999999997, 2.97], [-61.68000000000001, 3.32], [-61.80000000000001, 3.38], [-61.85000000000002, 3.25], [-61.75, 3.0], [-61.97000000000003, 2.47], [-62.5, 2.25], [-63.02999999999997, 2.47], [-63.18000000000001, 2.82], [-63.25, 2.85], [-63.5, 2.75], [-63.75, 2.85], [-64.0, 2.75], [-64.25, 2.85], [-64.5, 2.75], [-65.02999999999997, 2.97], [-65.25, 3.5], [-65.14999999999998, 3.75], [-65.25, 4.0], [-65.02999999999997, 4.53]]], [[[-61.5, 5.75], [-62.02999999999997, 5.97], [-62.25, 6.5], [-62.02999999999997, 7.03], [-61.5, 7.25], [-60.97000000000003, 7.03], [-60.75, 6.5], [-60.97000000000003, 5.97], [-61.5, 5.75]]]]}, "2023-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.25, 4.0], [-65.02999999999997, 4.53], [-64.68, 4.68], [-64.64999999999998, 4.75], [-64.75, 5.0], [-64.64999999999998, 5.25], [-64.75, 5.5], [-64.52999999999997, 6.03], [-64.18, 6.18], [-64.14999999999998, 6.25], [-64.25, 6.5], [-64.14999999999998, 6.75], [-64.25, 7.0], [-64.02999999999997, 7.53], [-63.5, 7.75], [-62.97000000000003, 7.53], [-62.81999999999999, 7.18], [-62.75, 7.15], [-62.68000000000001, 7.18], [-62.52999999999997, 7.53], [-62.0, 7.75], [-61.75, 7.65], [-61.5, 7.75], [-60.97000000000003, 7.53], [-60.75, 7.0], [-60.85000000000002, 6.75], [-60.75, 6.5], [-60.97000000000003, 5.97], [-61.5, 5.75], [-61.75, 5.85], [-61.81999999999999, 5.82], [-61.85000000000002, 5.75], [-61.75, 5.5], [-61.85000000000002, 5.25], [-61.81999999999999, 5.18], [-61.47000000000003, 5.03], [-61.31999999999999, 4.68], [-61.25, 4.65], [-61.18000000000001, 4.68], [-61.02999999999997, 5.03], [-60.5, 5.25], [-60.25, 5.15], [-60.0, 5.25], [-59.75, 5.15], [-59.5, 5.25], [-58.97000000000003, 5.03], [-58.75, 4.5], [-58.85000000000002, 4.25], [-58.75, 4.0], [-58.85000000000002, 3.75], [-58.75, 3.5], [-58.95999999999998, 3.0], [-58.75, 2.5], [-58.97000000000003, 1.97], [-59.5, 1.75], [-59.75, 1.85], [-60.0, 1.75], [-60.52999999999997, 1.97], [-60.68000000000001, 2.32], [-61.02999999999997, 2.47], [-61.18000000000001, 2.82], [-61.25, 2.85], [-61.5, 2.75], [-61.80000000000001, 2.88], [-61.97000000000003, 2.47], [-62.5, 2.25], [-63.02999999999997, 2.47], [-63.18000000000001, 2.82], [-63.25, 2.85], [-63.5, 2.75], [-63.75, 2.85], [-64.0, 2.75], [-64.25, 2.85], [-64.5, 2.75], [-65.02999999999997, 2.97], [-65.25, 3.5], [-65.14999999999998, 3.75], [-65.25, 4.0]]]]}, "2023-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.25, 4.0], [-65.02999999999997, 4.53], [-64.68, 4.68], [-64.64999999999998, 4.75], [-64.75, 5.0], [-64.64999999999998, 5.25], [-64.75, 5.5], [-64.52999999999997, 6.03], [-64.18, 6.18], [-64.14999999999998, 6.25], [-64.25, 6.5], [-64.14999999999998, 6.75], [-64.25, 7.0], [-64.02999999999997, 7.53], [-63.5, 7.75], [-62.97000000000003, 7.53], [-62.81999999999999, 7.18], [-62.75, 7.15], [-62.68000000000001, 7.18], [-62.52999999999997, 7.53], [-62.0, 7.75], [-61.75, 7.65], [-61.5, 7.75], [-60.97000000000003, 7.53], [-60.75, 7.0], [-60.85000000000002, 6.75], [-60.75, 6.5], [-60.97000000000003, 5.97], [-61.5, 5.75], [-61.25, 5.65], [-61.0, 5.75], [-60.47000000000003, 5.53], [-60.31999999999999, 5.18], [-60.25, 5.15], [-60.0, 5.25], [-59.75, 5.15], [-59.5, 5.25], [-58.97000000000003, 5.03], [-58.75, 4.5], [-58.85000000000002, 4.25], [-58.75, 4.0], [-58.85000000000002, 3.75], [-58.75, 3.5], [-58.85000000000002, 3.25], [-58.75, 3.0], [-58.85000000000002, 2.75], [-58.75, 2.5], [-58.97000000000003, 1.97], [-59.5, 1.75], [-59.75, 1.85], [-60.0, 1.75], [-60.52999999999997, 1.97], [-60.68000000000001, 2.32], [-61.02999999999997, 2.47], [-61.18000000000001, 2.82], [-61.25, 2.85], [-61.5, 2.75], [-61.80000000000001, 2.88], [-61.97000000000003, 2.47], [-62.5, 2.25], [-63.02999999999997, 2.47], [-63.18000000000001, 2.82], [-63.25, 2.85], [-63.5, 2.75], [-63.75, 2.85], [-64.0, 2.75], [-64.25, 2.85], [-64.5, 2.75], [-65.02999999999997, 2.97], [-65.25, 3.5], [-65.14999999999998, 3.75], [-65.25, 4.0]], [[-61.75, 5.85], [-61.81999999999999, 5.82], [-61.85000000000002, 5.75], [-61.80000000000001, 5.62], [-61.5, 5.75], [-61.75, 5.85]]]]}, "2023-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.25, 6.0], [-64.14999999999998, 6.25], [-64.25, 6.5], [-64.14999999999998, 6.75], [-64.25, 7.0], [-64.02999999999997, 7.53], [-63.5, 7.75], [-62.97000000000003, 7.53], [-62.81999999999999, 7.18], [-62.75, 7.15], [-62.68000000000001, 7.18], [-62.52999999999997, 7.53], [-62.0, 7.75], [-61.75, 7.65], [-61.5, 7.75], [-60.97000000000003, 7.53], [-60.75, 7.0], [-60.85000000000002, 6.75], [-60.75, 6.5], [-60.97000000000003, 5.97], [-61.5, 5.75], [-61.25, 5.65], [-61.0, 5.75], [-60.47000000000003, 5.53], [-60.31999999999999, 5.18], [-60.25, 5.15], [-60.0, 5.25], [-59.75, 5.15], [-59.5, 5.25], [-58.97000000000003, 5.03], [-58.75, 4.5], [-58.85000000000002, 4.25], [-58.75, 4.0], [-58.85000000000002, 3.75], [-58.75, 3.5], [-58.85000000000002, 3.25], [-58.75, 3.0], [-58.85000000000002, 2.75], [-58.75, 2.5], [-58.97000000000003, 1.97], [-59.5, 1.75], [-59.75, 1.85], [-60.0, 1.75], [-60.52999999999997, 1.97], [-60.68000000000001, 2.32], [-61.02999999999997, 2.47], [-61.18000000000001, 2.82], [-61.25, 2.85], [-61.5, 2.75], [-62.02999999999997, 2.97], [-62.25, 3.5], [-62.14999999999998, 3.75], [-62.18000000000001, 3.82], [-62.52999999999997, 3.97], [-62.68000000000001, 4.32], [-63.02999999999997, 4.47], [-63.19999999999999, 4.88], [-63.5, 4.75], [-64.02999999999997, 4.97], [-64.25, 5.5], [-64.14999999999998, 5.75], [-64.25, 6.0]], [[-61.75, 5.85], [-61.81999999999999, 5.82], [-61.85000000000002, 5.75], [-61.80000000000001, 5.62], [-61.5, 5.75], [-61.75, 5.85]]]]}, "2023-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.02999999999997, 6.47], [-64.25, 7.0], [-64.02999999999997, 7.53], [-63.5, 7.75], [-62.97000000000003, 7.53], [-62.81999999999999, 7.18], [-62.75, 7.15], [-62.68000000000001, 7.18], [-62.52999999999997, 7.53], [-62.0, 7.75], [-61.75, 7.65], [-61.5, 7.75], [-60.97000000000003, 7.53], [-60.75, 7.0], [-60.85000000000002, 6.75], [-60.75, 6.5], [-60.97000000000003, 5.97], [-61.5, 5.75], [-61.25, 5.65], [-61.0, 5.75], [-60.47000000000003, 5.53], [-60.31999999999999, 5.18], [-60.25, 5.15], [-60.0, 5.25], [-59.47000000000003, 5.03], [-59.31999999999999, 4.68], [-58.97000000000003, 4.53], [-58.75, 4.0], [-58.95999999999998, 3.5], [-58.75, 3.0], [-58.85000000000002, 2.75], [-58.75, 2.5], [-58.97000000000003, 1.97], [-59.5, 1.75], [-59.75, 1.85], [-60.0, 1.75], [-60.52999999999997, 1.97], [-60.68000000000001, 2.32], [-61.02999999999997, 2.47], [-61.18000000000001, 2.82], [-61.25, 2.85], [-61.5, 2.75], [-62.02999999999997, 2.97], [-62.25, 3.5], [-62.14999999999998, 3.75], [-62.25, 4.0], [-62.04000000000002, 4.5], [-62.19999999999999, 4.88], [-62.5, 4.75], [-63.02999999999997, 4.97], [-63.18000000000001, 5.32], [-63.52999999999997, 5.47], [-63.75, 6.0], [-63.64999999999998, 6.25], [-63.68000000000001, 6.32], [-64.02999999999997, 6.47]], [[-61.75, 5.85], [-61.81999999999999, 5.82], [-61.85000000000002, 5.75], [-61.80000000000001, 5.62], [-61.5, 5.75], [-61.75, 5.85]]]]}, "2023-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, 5.0], [-62.02999999999997, 5.53], [-61.5, 5.75], [-61.25, 5.65], [-61.0, 5.75], [-60.47000000000003, 5.53], [-60.31999999999999, 5.18], [-60.25, 5.15], [-60.0, 5.25], [-59.47000000000003, 5.03], [-59.25, 4.5], [-59.35000000000002, 4.25], [-59.25, 4.0], [-59.47000000000003, 3.47], [-59.81999999999999, 3.32], [-59.870000000000005, 3.2], [-59.75, 3.15], [-59.5, 3.25], [-58.97000000000003, 3.03], [-58.75, 2.5], [-58.97000000000003, 1.97], [-59.5, 1.75], [-59.75, 1.85], [-60.0, 1.75], [-60.52999999999997, 1.97], [-60.75, 2.5], [-60.620000000000005, 2.8], [-60.75, 2.85], [-61.0, 2.75], [-61.52999999999997, 2.97], [-61.68000000000001, 3.32], [-62.02999999999997, 3.47], [-62.25, 4.0], [-62.04000000000002, 4.5], [-62.25, 5.0]]]]}, "2023-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, 5.0], [-62.02999999999997, 5.53], [-61.5, 5.75], [-61.25, 5.65], [-61.0, 5.75], [-60.47000000000003, 5.53], [-60.31999999999999, 5.18], [-60.25, 5.15], [-60.0, 5.25], [-59.47000000000003, 5.03], [-59.25, 4.5], [-59.35000000000002, 4.25], [-59.25, 4.0], [-59.47000000000003, 3.47], [-59.81999999999999, 3.32], [-59.870000000000005, 3.2], [-59.75, 3.15], [-59.5, 3.25], [-58.97000000000003, 3.03], [-58.75, 2.5], [-58.97000000000003, 1.97], [-59.5, 1.75], [-59.75, 1.85], [-60.0, 1.75], [-60.52999999999997, 1.97], [-60.75, 2.5], [-60.620000000000005, 2.8], [-60.75, 2.85], [-61.0, 2.75], [-61.52999999999997, 2.97], [-61.68000000000001, 3.32], [-62.02999999999997, 3.47], [-62.25, 4.0], [-62.04000000000002, 4.5], [-62.25, 5.0]]]]}, "2023-03-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.02999999999997, 4.47], [-62.25, 5.0], [-62.02999999999997, 5.53], [-61.5, 5.75], [-61.25, 5.65], [-61.0, 5.75], [-60.47000000000003, 5.53], [-60.31999999999999, 5.18], [-60.25, 5.15], [-60.0, 5.25], [-59.47000000000003, 5.03], [-59.25, 4.5], [-59.35000000000002, 4.25], [-59.25, 4.0], [-59.47000000000003, 3.47], [-60.0, 3.25], [-59.75, 3.15], [-59.5, 3.25], [-58.97000000000003, 3.03], [-58.75, 2.5], [-58.97000000000003, 1.97], [-59.5, 1.75], [-59.75, 1.85], [-60.0, 1.75], [-60.52999999999997, 1.97], [-60.75, 2.5], [-60.56999999999999, 2.93], [-61.0, 2.75], [-61.52999999999997, 2.97], [-61.75, 3.5], [-61.54000000000002, 4.0], [-61.68000000000001, 4.32], [-62.02999999999997, 4.47]], [[-60.25, 3.35], [-60.31999999999999, 3.32], [-60.43000000000001, 3.07], [-60.0, 3.25], [-60.25, 3.35]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.398482109012889}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.8198491129635426}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.438917854134445, 23.62584830207362, 23.706414675126155, 24.643045529379037, 24.777005620874377, 25.224362858818836, 24.998120147357497, 24.764005780685466]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.907589068594802, 20.00547809234405, 19.76240219872483, 20.727068046938996, 20.355342011871357, 20.688178706795327, 20.077721172863335, 20.52561425790617]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6777879228369903, -2.00920589337963, -1.8293343979275045, -1.642702160380163, -1.8383146008658717, -1.7810873928039235, -2.005336896712248, -1.6016732607003974]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6393851556869095, -3.398482109012889, -3.2869515134599965, -2.740838123879257, -3.1141086672402594, -2.7451994121656185, -3.018872408363393, -1.8707618962176866]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.434269351782623, -1.856655273541778, -1.6700881264442986, -1.5218191940100374, -1.6715519185598935, -1.6991984838309082, -1.8931282902347206, -1.5573981137177135]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1133220329270057, -3.3484983468781464, -2.683521953381255, -2.505138169313729, -2.392424027867479, -2.081745174609869, -2.3443010595312814, -1.9728653680992367]}}