{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:40.511716", "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": "2018-May-16_to_2018-May-18_304.5_5.0"}, "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": 2018050000684}, "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 16 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 18 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 67708.50899717868}, "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": ["French Guiana", "Guyana", "Suriname"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South 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": ["North Atlantic Ocean"]}, "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": 5.0}, "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": 304.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "304.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 4.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.25, 5.0], [-58.03, 5.53], [-57.68, 5.68], [-57.65, 5.75], [-57.75, 6.0], [-57.53, 6.53], [-57.0, 6.75], [-56.75, 6.65], [-56.5, 6.75], [-56.25, 6.65], [-56.0, 6.75], [-55.75, 6.65], [-55.5, 6.75], [-55.25, 6.65], [-55.0, 6.75], [-54.47, 6.53], [-54.32, 6.18], [-54.25, 6.15], [-54.0, 6.25], [-53.47, 6.03], [-53.25, 5.5], [-53.47, 4.97], [-53.82, 4.82], [-53.97, 4.47], [-54.32, 4.32], [-54.47, 3.97], [-55.0, 3.75], [-55.53, 3.97], [-55.68, 4.32], [-55.75, 4.35], [-55.82, 4.32], [-55.97, 3.97], [-56.5, 3.75], [-56.75, 3.85], [-57.0, 3.75], [-57.53, 3.97], [-57.68, 4.32], [-58.03, 4.47], [-58.25, 5.0]]]]}, "2018-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.25, 5.0], [-58.03, 5.53], [-57.68, 5.68], [-57.65, 5.75], [-57.75, 6.0], [-57.53, 6.53], [-57.0, 6.75], [-56.75, 6.65], [-56.5, 6.75], [-56.25, 6.65], [-56.0, 6.75], [-55.75, 6.65], [-55.5, 6.75], [-55.25, 6.65], [-55.0, 6.75], [-54.47, 6.53], [-54.32, 6.18], [-54.25, 6.15], [-54.0, 6.25], [-53.47, 6.03], [-53.25, 5.5], [-53.47, 4.97], [-53.82, 4.82], [-53.97, 4.47], [-54.32, 4.32], [-54.47, 3.97], [-55.0, 3.75], [-55.53, 3.97], [-55.68, 4.32], [-55.75, 4.35], [-55.82, 4.32], [-55.97, 3.97], [-56.5, 3.75], [-56.75, 3.85], [-57.0, 3.75], [-57.53, 3.97], [-57.68, 4.32], [-58.03, 4.47], [-58.25, 5.0]]]]}, "2018-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.25, 5.0], [-58.03, 5.53], [-57.68, 5.68], [-57.65, 5.75], [-57.75, 6.0], [-57.53, 6.53], [-57.0, 6.75], [-56.75, 6.65], [-56.5, 6.75], [-56.25, 6.65], [-56.0, 6.75], [-55.75, 6.65], [-55.5, 6.75], [-55.25, 6.65], [-55.0, 6.75], [-54.47, 6.53], [-54.32, 6.18], [-54.25, 6.15], [-54.0, 6.25], [-53.47, 6.03], [-53.25, 5.5], [-53.47, 4.97], [-53.82, 4.82], [-53.97, 4.47], [-54.32, 4.32], [-54.47, 3.97], [-55.0, 3.75], [-55.53, 3.97], [-55.68, 4.32], [-55.75, 4.35], [-55.82, 4.32], [-55.97, 3.97], [-56.5, 3.75], [-56.75, 3.85], [-57.0, 3.75], [-57.53, 3.97], [-57.68, 4.32], [-58.03, 4.47], [-58.25, 5.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.1245797908388795}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1110487730991891}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.00837431854768, 24.848118723423227, 24.731399679032336]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.154987773200958, 23.839473049971502, 23.56033661526999]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9828239469618619, -1.126451664092705, -1.223870708243001]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3240722841563866, -1.5580218380161455, -2.1245797908388795]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6013590133230233, -1.921058150030606, -2.0142670168742582]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9456834113273835, -2.4871659733820297, -2.9456868749575356]}}