{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:11.333339", "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": "2011-Apr-19_to_2011-Apr-22_21.0_31.0"}, "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": 2011040000997}, "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 19 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 22 2011"}, "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": 108357.06059275655}, "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": ["Libya"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": 31.0}, "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": 21.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 20.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.47, 31.53], [21.0, 31.75], [21.53, 31.53], [21.68, 31.18], [21.75, 31.15], [22.0, 31.25], [22.53, 31.03], [22.68, 30.68], [23.03, 30.53], [23.18, 30.18], [23.53, 30.03], [23.75, 29.5], [23.53, 28.97], [23.0, 28.75], [22.47, 28.97], [22.32, 29.32], [22.25, 29.35], [22.0, 29.25], [21.47, 29.47], [21.32, 29.82], [21.25, 29.85], [21.0, 29.75], [20.47, 29.97], [20.25, 30.5], [20.35, 30.75], [20.25, 31.0], [20.47, 31.53]]]]}, "2011-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, 31.75], [19.75, 32.0], [19.97, 32.53], [20.32, 32.68], [20.47, 33.03], [21.0, 33.25], [21.25, 33.15], [21.5, 33.25], [21.75, 33.15], [22.0, 33.25], [22.25, 33.15], [22.5, 33.25], [22.75, 33.15], [23.0, 33.25], [23.53, 33.03], [23.68, 32.68], [24.03, 32.53], [24.18, 32.18], [24.53, 32.03], [24.68, 31.68], [25.03, 31.53], [25.25, 31.0], [25.03, 30.47], [24.68, 30.32], [24.53, 29.97], [24.18, 29.82], [24.03, 29.47], [23.68, 29.32], [23.53, 28.97], [23.0, 28.75], [22.47, 28.97], [22.32, 29.32], [22.25, 29.35], [22.0, 29.25], [21.47, 29.47], [21.32, 29.82], [21.25, 29.85], [21.0, 29.75], [20.47, 29.97], [20.32, 30.32], [19.97, 30.47], [19.75, 31.0], [19.85, 31.25], [19.75, 31.5], [19.85, 31.75]]]]}, "2011-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, 31.75], [19.75, 32.0], [19.97, 32.53], [20.32, 32.68], [20.47, 33.03], [21.0, 33.25], [21.25, 33.15], [21.5, 33.25], [21.75, 33.15], [22.0, 33.25], [22.25, 33.15], [22.5, 33.25], [22.75, 33.15], [23.0, 33.25], [23.53, 33.03], [23.68, 32.68], [24.03, 32.53], [24.18, 32.18], [24.53, 32.03], [24.68, 31.68], [25.03, 31.53], [25.25, 31.0], [25.03, 30.47], [24.68, 30.32], [24.53, 29.97], [24.18, 29.82], [24.03, 29.47], [23.68, 29.32], [23.53, 28.97], [23.0, 28.75], [22.47, 28.97], [22.32, 29.32], [22.25, 29.35], [22.0, 29.25], [21.47, 29.47], [21.32, 29.82], [21.25, 29.85], [21.0, 29.75], [20.47, 29.97], [20.32, 30.32], [19.97, 30.47], [19.75, 31.0], [19.85, 31.25], [19.75, 31.5], [19.85, 31.75]]]]}, "2011-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, 31.75], [19.75, 32.0], [19.97, 32.53], [20.32, 32.68], [20.47, 33.03], [21.0, 33.25], [21.25, 33.15], [21.5, 33.25], [21.75, 33.15], [22.0, 33.25], [22.25, 33.15], [22.5, 33.25], [22.75, 33.15], [23.0, 33.25], [23.53, 33.03], [23.68, 32.68], [24.03, 32.53], [24.18, 32.18], [24.53, 32.03], [24.68, 31.68], [25.03, 31.53], [25.25, 31.0], [25.03, 30.47], [24.68, 30.32], [24.53, 29.97], [24.18, 29.82], [24.03, 29.47], [23.68, 29.32], [23.53, 28.97], [23.0, 28.75], [22.47, 28.97], [22.32, 29.32], [22.25, 29.35], [22.0, 29.25], [21.47, 29.47], [21.32, 29.82], [21.25, 29.85], [21.0, 29.75], [20.47, 29.97], [20.32, 30.32], [19.97, 30.47], [19.75, 31.0], [19.85, 31.25], [19.75, 31.5], [19.85, 31.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.141334009319223}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.991276645673955}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.459042762916113, 15.435551894556397, 15.527538234910253, 14.831853081706072]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.841342092057687, 11.750247670433225, 11.382115133976129, 11.50657356425819]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.660459864147542, -4.913839146923354, -4.714691048400809, -5.401780655616849]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.841706858886766, -6.504479688759943, -5.634537581568338, -7.141334009319223]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2284161884523868, -1.3450524695905213, -1.3412278446494261, -1.589546757780491]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3029007438347882, -1.7487127088436536, -1.6060672511444027, -2.045780173840949]}}