{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:54.141829", "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-31_to_2023-Apr-04_297.0_9.0"}, "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": 2023030001032}, "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 31 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2023"}, "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": 58078.01421834258}, "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": ["Venezuela, Bolivarian Republic of"]}, "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": 9.0}, "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": 297.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "297.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 296.0}, "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": 7.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-63.75, 10.15], [-63.5, 10.25], [-63.25, 10.15], [-63.0, 10.25], [-62.47, 10.03], [-62.32, 9.68], [-62.25, 9.65], [-62.0, 9.75], [-61.47, 9.53], [-61.25, 9.0], [-61.35, 8.75], [-61.32, 8.68], [-60.97, 8.53], [-60.75, 8.0], [-60.97, 7.47], [-61.5, 7.25], [-61.75, 7.35], [-62.0, 7.25], [-62.25, 7.35], [-62.32, 7.32], [-62.47, 6.97], [-63.0, 6.75], [-63.25, 6.85], [-63.5, 6.75], [-64.03, 6.97], [-64.25, 7.5], [-64.15, 7.75], [-64.18, 7.82], [-64.53, 7.97], [-64.75, 8.5], [-64.54, 9.0], [-64.75, 9.5], [-64.53, 10.03], [-64.0, 10.25], [-63.75, 10.15]]]]}}, "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": {"2023-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.75, 9.5], [-64.52999999999997, 10.03], [-64.0, 10.25], [-63.75, 10.15], [-63.5, 10.25], [-63.25, 10.15], [-63.0, 10.25], [-62.47000000000003, 10.03], [-62.31999999999999, 9.68], [-62.25, 9.65], [-62.0, 9.75], [-61.47000000000003, 9.53], [-61.25, 9.0], [-61.35000000000002, 8.75], [-61.31999999999999, 8.68], [-60.97000000000003, 8.53], [-60.75, 8.0], [-60.97000000000003, 7.47], [-61.5, 7.25], [-61.75, 7.35], [-62.0, 7.25], [-62.25, 7.35], [-62.31999999999999, 7.32], [-62.47000000000003, 6.97], [-63.0, 6.75], [-63.25, 6.85], [-63.5, 6.75], [-64.02999999999997, 6.97], [-64.25, 7.5], [-64.14999999999998, 7.75], [-64.18, 7.82], [-64.52999999999997, 7.97], [-64.75, 8.5], [-64.54000000000002, 9.0], [-64.75, 9.5]]]]}, "2023-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.75, 9.5], [-64.52999999999997, 10.03], [-64.0, 10.25], [-63.75, 10.15], [-63.5, 10.25], [-63.25, 10.15], [-63.0, 10.25], [-62.47000000000003, 10.03], [-62.31999999999999, 9.68], [-62.25, 9.65], [-62.0, 9.75], [-61.47000000000003, 9.53], [-61.25, 9.0], [-61.35000000000002, 8.75], [-61.31999999999999, 8.68], [-60.97000000000003, 8.53], [-60.75, 8.0], [-60.97000000000003, 7.47], [-61.5, 7.25], [-61.75, 7.35], [-62.0, 7.25], [-62.25, 7.35], [-62.31999999999999, 7.32], [-62.47000000000003, 6.97], [-63.0, 6.75], [-63.25, 6.85], [-63.5, 6.75], [-64.02999999999997, 6.97], [-64.25, 7.5], [-64.14999999999998, 7.75], [-64.18, 7.82], [-64.52999999999997, 7.97], [-64.75, 8.5], [-64.54000000000002, 9.0], [-64.75, 9.5]]]]}, "2023-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.75, 9.5], [-64.52999999999997, 10.03], [-64.0, 10.25], [-63.75, 10.15], [-63.5, 10.25], [-63.25, 10.15], [-63.0, 10.25], [-62.47000000000003, 10.03], [-62.31999999999999, 9.68], [-62.25, 9.65], [-62.0, 9.75], [-61.47000000000003, 9.53], [-61.25, 9.0], [-61.35000000000002, 8.75], [-61.31999999999999, 8.68], [-60.97000000000003, 8.53], [-60.75, 8.0], [-60.97000000000003, 7.47], [-61.5, 7.25], [-61.75, 7.35], [-62.0, 7.25], [-62.25, 7.35], [-62.31999999999999, 7.32], [-62.47000000000003, 6.97], [-63.0, 6.75], [-63.25, 6.85], [-63.5, 6.75], [-64.02999999999997, 6.97], [-64.25, 7.5], [-64.14999999999998, 7.75], [-64.18, 7.82], [-64.52999999999997, 7.97], [-64.75, 8.5], [-64.54000000000002, 9.0], [-64.75, 9.5]]]]}, "2023-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.02999999999997, 7.97], [-64.25, 8.5], [-64.02999999999997, 9.03], [-63.68000000000001, 9.18], [-63.52999999999997, 9.53], [-63.0, 9.75], [-62.75, 9.65], [-62.5, 9.75], [-61.97000000000003, 9.53], [-61.75, 9.0], [-61.85000000000002, 8.75], [-61.81999999999999, 8.68], [-61.47000000000003, 8.53], [-61.25, 8.0], [-61.47000000000003, 7.47], [-62.0, 7.25], [-62.25, 7.35], [-62.5, 7.25], [-62.75, 7.35], [-63.0, 7.25], [-63.52999999999997, 7.47], [-63.68000000000001, 7.82], [-64.02999999999997, 7.97]]]]}, "2023-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.75, 9.0], [-63.52999999999997, 9.53], [-63.0, 9.75], [-62.75, 9.65], [-62.5, 9.75], [-61.97000000000003, 9.53], [-61.75, 9.0], [-61.85000000000002, 8.75], [-61.81999999999999, 8.68], [-61.47000000000003, 8.53], [-61.25, 8.0], [-61.47000000000003, 7.47], [-62.0, 7.25], [-62.25, 7.35], [-62.5, 7.25], [-63.02999999999997, 7.47], [-63.18000000000001, 7.82], [-63.52999999999997, 7.97], [-63.75, 8.5], [-63.64999999999998, 8.75], [-63.75, 9.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.950160392402722}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.8297253746230224}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.630086321848466, 25.428854654497854, 26.007244930573734, 26.36089478985224, 26.098714049464377]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.39866060848931, 23.60494161488282, 23.82231288108528, 23.906149763606493, 24.119465595738063]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9196616132290507, -2.1785328911532336, -1.636380787166442, -1.5080210210900518, -1.4815671483480628]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.273407875412147, -2.950160392402722, -2.1514258579475154, -1.6814330238011053, -1.6540868038358667]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8924852143562452, -2.197558567855353, -1.6795716105100351, -1.5372136738571378, -1.4865580876788365]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2340147863082223, -2.781092193466661, -2.115586943172057, -1.6329730545787216, -1.5853587396241902]}}