{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:12.552391", "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": "2021-Apr-23_to_2021-Apr-27_302.5_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": 2021040000953}, "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": "April 23 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 2021"}, "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": 77005.34485103106}, "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": ["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": []}, "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": 302.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "302.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 300.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 304.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 3.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.0, 5.75], [-58.47, 5.53], [-58.25, 5.0], [-58.47, 4.47], [-59.0, 4.25], [-59.53, 4.47], [-59.75, 5.0], [-59.53, 5.53], [-59.0, 5.75]]]]}, "2021-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.65, 5.25], [-59.75, 5.5], [-59.53, 6.03], [-59.0, 6.25], [-58.75, 6.15], [-58.5, 6.25], [-58.25, 6.15], [-58.0, 6.25], [-57.75, 6.15], [-57.5, 6.25], [-57.25, 6.15], [-57.0, 6.25], [-56.47, 6.03], [-56.32, 5.68], [-56.25, 5.65], [-56.0, 5.75], [-55.75, 5.65], [-55.5, 5.75], [-54.97, 5.53], [-54.75, 5.0], [-54.97, 4.47], [-55.32, 4.32], [-55.47, 3.97], [-55.82, 3.82], [-55.97, 3.47], [-56.5, 3.25], [-56.75, 3.35], [-57.0, 3.25], [-57.25, 3.35], [-57.5, 3.25], [-58.03, 3.47], [-58.18, 3.82], [-58.25, 3.85], [-58.5, 3.75], [-58.75, 3.85], [-59.0, 3.75], [-59.53, 3.97], [-59.75, 4.5], [-59.65, 4.75], [-59.75, 5.0], [-59.65, 5.25]]]]}, "2021-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.65, 5.25], [-59.75, 5.5], [-59.53, 6.03], [-59.0, 6.25], [-58.75, 6.15], [-58.5, 6.25], [-58.25, 6.15], [-58.0, 6.25], [-57.75, 6.15], [-57.5, 6.25], [-57.25, 6.15], [-57.0, 6.25], [-56.47, 6.03], [-56.32, 5.68], [-56.25, 5.65], [-56.0, 5.75], [-55.75, 5.65], [-55.5, 5.75], [-54.97, 5.53], [-54.75, 5.0], [-54.85, 4.75], [-54.75, 4.5], [-54.97, 3.97], [-55.32, 3.82], [-55.47, 3.47], [-56.0, 3.25], [-56.25, 3.35], [-56.5, 3.25], [-56.75, 3.35], [-57.0, 3.25], [-57.25, 3.35], [-57.5, 3.25], [-58.03, 3.47], [-58.18, 3.82], [-58.25, 3.85], [-58.5, 3.75], [-58.75, 3.85], [-59.0, 3.75], [-59.53, 3.97], [-59.75, 4.5], [-59.65, 4.75], [-59.75, 5.0], [-59.65, 5.25]]]]}, "2021-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.65, 5.25], [-59.75, 5.5], [-59.53, 6.03], [-59.0, 6.25], [-58.75, 6.15], [-58.5, 6.25], [-58.25, 6.15], [-58.0, 6.25], [-57.75, 6.15], [-57.5, 6.25], [-57.25, 6.15], [-57.0, 6.25], [-56.47, 6.03], [-56.32, 5.68], [-56.25, 5.65], [-56.0, 5.75], [-55.75, 5.65], [-55.5, 5.75], [-54.97, 5.53], [-54.75, 5.0], [-54.85, 4.75], [-54.75, 4.5], [-54.97, 3.97], [-55.32, 3.82], [-55.47, 3.47], [-56.0, 3.25], [-56.25, 3.35], [-56.5, 3.25], [-56.75, 3.35], [-57.0, 3.25], [-57.25, 3.35], [-57.5, 3.25], [-58.03, 3.47], [-58.18, 3.82], [-58.25, 3.85], [-58.5, 3.75], [-58.75, 3.85], [-59.0, 3.75], [-59.53, 3.97], [-59.75, 4.5], [-59.65, 4.75], [-59.75, 5.0], [-59.65, 5.25]]]]}, "2021-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.65, 5.25], [-59.75, 5.5], [-59.53, 6.03], [-59.0, 6.25], [-58.75, 6.15], [-58.5, 6.25], [-58.25, 6.15], [-58.0, 6.25], [-57.75, 6.15], [-57.5, 6.25], [-57.25, 6.15], [-57.0, 6.25], [-56.47, 6.03], [-56.32, 5.68], [-56.25, 5.65], [-56.0, 5.75], [-55.75, 5.65], [-55.5, 5.75], [-54.97, 5.53], [-54.75, 5.0], [-54.85, 4.75], [-54.75, 4.5], [-54.97, 3.97], [-55.32, 3.82], [-55.47, 3.47], [-56.0, 3.25], [-56.25, 3.35], [-56.5, 3.25], [-56.75, 3.35], [-57.0, 3.25], [-57.25, 3.35], [-57.5, 3.25], [-58.03, 3.47], [-58.18, 3.82], [-58.25, 3.85], [-58.5, 3.75], [-58.75, 3.85], [-59.0, 3.75], [-59.53, 3.97], [-59.75, 4.5], [-59.65, 4.75], [-59.75, 5.0], [-59.65, 5.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3522529022870913}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.660031961658437}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.44417023583395, 24.264518650742218, 24.403280971733636, 24.418776404117125, 23.966390796346843]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.44417023583395, 23.855476773451244, 23.408409893220323, 23.805845624029132, 23.302112649520325]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1283100169638374, -1.6864115657821774, -1.5312742949226776, -1.5089462547299877, 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