{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:02.252587", "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-Sep-27_to_2018-Oct-02_21.5_31.5"}, "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": 2018090000954}, "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": "September 27 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 02 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 527292.1986560568}, "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": ["Algeria", "Libya", "Tunisia"]}, "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": ["Mediterranean Sea - Eastern Basin"]}, "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": 31.5}, "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": 21.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 8.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.25, 29.5], [8.47, 30.03], [8.82, 30.18], [8.96, 30.5], [8.75, 31.0], [8.85, 31.25], [8.82, 31.32], [8.47, 31.47], [8.25, 32.0], [8.47, 32.53], [9.0, 32.75], [9.25, 32.65], [9.5, 32.75], [9.75, 32.65], [10.0, 32.75], [10.3, 32.63], [10.35, 32.75], [10.25, 33.0], [10.47, 33.53], [11.0, 33.75], [11.25, 33.65], [11.5, 33.75], [12.03, 33.53], [12.18, 33.18], [12.25, 33.15], [12.5, 33.25], [13.03, 33.03], [13.18, 32.68], [13.25, 32.65], [13.5, 32.75], [13.8, 32.63], [13.97, 33.03], [14.5, 33.25], [15.03, 33.03], [15.18, 32.68], [15.25, 32.65], [15.5, 32.75], [16.03, 32.53], [16.18, 32.18], [16.25, 32.15], [16.5, 32.25], [17.03, 32.03], [17.18, 31.68], [17.25, 31.65], [17.5, 31.75], [17.75, 31.65], [18.0, 31.75], [18.53, 31.53], [18.68, 31.18], [19.03, 31.03], [19.18, 30.68], [19.25, 30.65], [19.32, 30.68], [19.47, 31.03], [19.82, 31.18], [19.85, 31.25], [19.75, 31.5], [19.85, 31.75], [19.75, 32.0], [19.97, 32.53], [20.5, 32.75], [20.75, 32.65], [21.0, 32.75], [21.25, 32.65], [21.5, 32.75], [22.03, 32.53], [22.18, 32.18], [22.53, 32.03], [22.75, 31.5], [22.65, 31.25], [22.75, 31.0], [22.53, 30.47], [22.18, 30.32], [22.03, 29.97], [21.5, 29.75], [21.25, 29.85], [21.0, 29.75], [20.75, 29.85], [20.68, 29.82], [20.65, 29.75], [20.75, 29.5], [20.53, 28.97], [20.18, 28.82], [20.03, 28.47], [19.5, 28.25], [19.25, 28.35], [19.18, 28.32], [19.03, 27.97], [18.5, 27.75], [18.25, 27.85], [18.0, 27.75], [17.75, 27.85], [17.68, 27.82], [17.53, 27.47], [17.0, 27.25], [16.75, 27.35], [16.68, 27.32], [16.53, 26.97], [16.0, 26.75], [15.75, 26.85], [15.5, 26.75], [15.25, 26.85], [15.18, 26.82], [15.03, 26.47], [14.5, 26.25], [14.25, 26.35], [14.0, 26.25], [13.47, 26.47], [13.32, 26.82], [13.25, 26.85], [13.0, 26.75], [12.75, 26.85], [12.5, 26.75], [12.25, 26.85], [12.0, 26.75], [11.47, 26.97], [11.32, 27.32], [10.97, 27.47], [10.82, 27.82], [10.75, 27.85], [10.5, 27.75], [10.25, 27.85], [10.0, 27.75], [9.47, 27.97], [9.32, 28.32], [8.97, 28.47], [8.82, 28.82], [8.47, 28.97], [8.25, 29.5]], [[14.32, 31.82], [14.2, 31.88], [14.15, 31.75], [14.18, 31.68], [14.25, 31.65], [14.38, 31.7], [14.32, 31.82]]]]}, "2018-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.25, 29.5], [8.47, 30.03], [8.82, 30.18], [8.96, 30.5], [8.75, 31.0], [8.85, 31.25], [8.82, 31.32], [8.47, 31.47], [8.25, 32.0], [8.47, 32.53], [9.0, 32.75], [9.25, 32.65], [9.5, 32.75], [9.75, 32.65], [10.0, 32.75], [10.3, 32.63], [10.35, 32.75], [10.25, 33.0], [10.47, 33.53], [11.0, 33.75], [11.25, 33.65], [11.5, 33.75], [12.03, 33.53], [12.18, 33.18], [12.25, 33.15], [12.5, 33.25], [13.03, 33.03], [13.18, 32.68], [13.25, 32.65], [13.5, 32.75], [13.8, 32.63], [13.97, 33.03], [14.5, 33.25], [15.03, 33.03], [15.18, 32.68], [15.25, 32.65], [15.5, 32.75], [16.03, 32.53], [16.18, 32.18], [16.25, 32.15], [16.5, 32.25], [17.03, 32.03], [17.18, 31.68], [17.25, 31.65], [17.5, 31.75], [17.75, 31.65], [18.0, 31.75], [18.53, 31.53], [18.68, 31.18], [19.03, 31.03], [19.18, 30.68], [19.25, 30.65], [19.32, 30.68], [19.47, 31.03], [19.82, 31.18], [19.85, 31.25], [19.75, 31.5], [19.85, 31.75], [19.75, 32.0], [19.97, 32.53], [20.5, 32.75], [20.75, 32.65], [21.0, 32.75], [21.25, 32.65], [21.5, 32.75], [21.75, 32.65], [22.0, 32.75], [22.25, 32.65], [22.5, 32.75], [22.75, 32.65], [23.0, 32.75], [23.53, 32.53], [23.68, 32.18], [24.03, 32.03], [24.25, 31.5], [24.03, 30.97], [23.68, 30.82], [23.53, 30.47], [23.18, 30.32], [23.15, 30.25], [23.25, 30.0], [23.03, 29.47], [22.5, 29.25], [22.25, 29.35], [22.0, 29.25], [21.75, 29.35], [21.5, 29.25], [20.97, 29.47], [20.82, 29.82], [20.75, 29.85], [20.68, 29.82], [20.65, 29.75], [20.75, 29.5], [20.53, 28.97], [20.18, 28.82], [20.03, 28.47], [19.5, 28.25], [19.25, 28.35], [19.18, 28.32], [19.03, 27.97], [18.5, 27.75], [18.25, 27.85], [18.0, 27.75], [17.75, 27.85], [17.68, 27.82], [17.53, 27.47], [17.0, 27.25], [16.75, 27.35], [16.68, 27.32], [16.53, 26.97], [16.0, 26.75], [15.75, 26.85], [15.5, 26.75], [15.25, 26.85], [15.18, 26.82], [15.03, 26.47], [14.5, 26.25], [14.25, 26.35], [14.0, 26.25], [13.47, 26.47], [13.32, 26.82], [13.25, 26.85], [13.0, 26.75], [12.75, 26.85], [12.5, 26.75], [12.25, 26.85], [12.0, 26.75], [11.47, 26.97], [11.32, 27.32], [10.97, 27.47], [10.82, 27.82], [10.75, 27.85], [10.5, 27.75], [10.25, 27.85], [10.0, 27.75], [9.47, 27.97], [9.32, 28.32], [8.97, 28.47], [8.82, 28.82], [8.47, 28.97], [8.25, 29.5]], [[14.32, 31.82], [14.2, 31.88], [14.15, 31.75], [14.18, 31.68], [14.25, 31.65], [14.38, 31.7], [14.32, 31.82]]]]}, "2018-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.25, 29.5], [8.47, 30.03], [8.82, 30.18], [8.96, 30.5], [8.75, 31.0], [8.85, 31.25], [8.82, 31.32], [8.47, 31.47], [8.25, 32.0], [8.47, 32.53], [9.0, 32.75], [9.25, 32.65], [9.5, 32.75], [9.75, 32.65], [10.0, 32.75], [10.3, 32.63], [10.35, 32.75], [10.25, 33.0], [10.47, 33.53], [11.0, 33.75], [11.25, 33.65], [11.5, 33.75], [12.03, 33.53], [12.18, 33.18], [12.25, 33.15], [12.5, 33.25], [13.03, 33.03], [13.18, 32.68], [13.25, 32.65], [13.5, 32.75], [13.8, 32.63], [13.97, 33.03], [14.5, 33.25], [15.03, 33.03], [15.18, 32.68], [15.25, 32.65], [15.5, 32.75], [16.03, 32.53], [16.18, 32.18], [16.25, 32.15], [16.5, 32.25], [17.03, 32.03], [17.18, 31.68], [17.25, 31.65], [17.5, 31.75], [17.75, 31.65], [18.0, 31.75], [18.53, 31.53], [18.68, 31.18], [19.03, 31.03], [19.18, 30.68], [19.25, 30.65], [19.32, 30.68], [19.47, 31.03], [19.82, 31.18], [19.85, 31.25], [19.75, 31.5], [19.85, 31.75], [19.75, 32.0], [19.97, 32.53], [20.5, 32.75], [20.75, 32.65], [21.0, 32.75], [21.25, 32.65], [21.5, 32.75], [21.75, 32.65], [22.0, 32.75], [22.25, 32.65], [22.5, 32.75], [22.75, 32.65], [23.0, 32.75], [23.53, 32.53], [23.68, 32.18], [24.03, 32.03], [24.25, 31.5], [24.03, 30.97], [23.68, 30.82], [23.53, 30.47], [23.18, 30.32], [23.15, 30.25], [23.25, 30.0], [23.03, 29.47], [22.5, 29.25], [22.25, 29.35], [22.0, 29.25], [21.75, 29.35], [21.5, 29.25], [20.97, 29.47], [20.82, 29.82], [20.75, 29.85], [20.68, 29.82], [20.65, 29.75], [20.75, 29.5], [20.53, 28.97], [20.18, 28.82], [20.03, 28.47], [19.5, 28.25], [19.25, 28.35], [19.18, 28.32], [19.03, 27.97], [18.5, 27.75], [18.25, 27.85], [18.0, 27.75], [17.75, 27.85], [17.68, 27.82], [17.53, 27.47], [17.0, 27.25], [16.75, 27.35], [16.68, 27.32], [16.53, 26.97], [16.0, 26.75], [15.75, 26.85], [15.5, 26.75], [15.25, 26.85], [15.18, 26.82], [15.03, 26.47], [14.5, 26.25], [14.25, 26.35], [14.0, 26.25], [13.47, 26.47], [13.32, 26.82], [13.25, 26.85], [13.0, 26.75], [12.75, 26.85], [12.5, 26.75], [12.25, 26.85], [12.0, 26.75], [11.47, 26.97], [11.32, 27.32], [10.97, 27.47], [10.82, 27.82], [10.75, 27.85], [10.5, 27.75], [10.25, 27.85], [10.0, 27.75], [9.47, 27.97], [9.32, 28.32], [8.97, 28.47], [8.82, 28.82], [8.47, 28.97], [8.25, 29.5]], [[14.32, 31.82], [14.2, 31.88], [14.15, 31.75], [14.18, 31.68], [14.25, 31.65], [14.38, 31.7], [14.32, 31.82]]]]}, "2018-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 30.5], [14.47, 31.03], [15.0, 31.25], [15.25, 31.15], [15.32, 31.18], [15.47, 31.53], [16.0, 31.75], [16.25, 31.65], [16.5, 31.75], [16.75, 31.65], [17.0, 31.75], [17.25, 31.65], [17.5, 31.75], [18.03, 31.53], [18.18, 31.18], [18.25, 31.15], [18.5, 31.25], [19.03, 31.03], [19.25, 30.5], [19.03, 29.97], [18.5, 29.75], [18.25, 29.85], [18.0, 29.75], [17.5, 29.96], [17.0, 29.75], [16.47, 29.97], [16.32, 30.32], [16.25, 30.35], [16.18, 30.32], [16.03, 29.97], [15.5, 29.75], [15.25, 29.85], [15.0, 29.75], [14.47, 29.97], [14.25, 30.5]]], [[[19.75, 31.5], [19.85, 31.75], [19.75, 32.0], [19.97, 32.53], [20.5, 32.75], [20.75, 32.65], [21.0, 32.75], [21.25, 32.65], [21.5, 32.75], [21.75, 32.65], [22.0, 32.75], [22.25, 32.65], [22.5, 32.75], [22.75, 32.65], [23.0, 32.75], [23.53, 32.53], [23.68, 32.18], [24.03, 32.03], [24.25, 31.5], [24.03, 30.97], [23.68, 30.82], [23.53, 30.47], [23.18, 30.32], [23.15, 30.25], [23.25, 30.0], [23.03, 29.47], [22.5, 29.25], [22.25, 29.35], [22.0, 29.25], [21.75, 29.35], [21.5, 29.25], [20.97, 29.47], [20.82, 29.82], [20.75, 29.85], [20.5, 29.75], [20.25, 29.85], [20.0, 29.75], [19.47, 29.97], [19.25, 30.5], [19.47, 31.03], [19.82, 31.18], [19.85, 31.25], [19.75, 31.5]]], [[[11.97, 32.03], [12.5, 32.25], [12.75, 32.15], [13.0, 32.25], [13.53, 32.03], [13.75, 31.5], [13.53, 30.97], [13.0, 30.75], [12.75, 30.85], [12.5, 30.75], [11.97, 30.97], [11.75, 31.5], [11.97, 32.03]]]]}, "2018-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.75, 31.5], [19.97, 32.03], [20.5, 32.25], [20.75, 32.15], [20.82, 32.18], [20.97, 32.53], [21.5, 32.75], [21.75, 32.65], [22.0, 32.75], [22.25, 32.65], [22.5, 32.75], [22.75, 32.65], [23.0, 32.75], [23.53, 32.53], [23.75, 32.0], [23.65, 31.75], [23.75, 31.5], [23.53, 30.97], [23.18, 30.82], [23.03, 30.47], [22.5, 30.25], [22.25, 30.35], [22.18, 30.32], [22.03, 29.97], [21.5, 29.75], [21.25, 29.85], [21.0, 29.75], [20.47, 29.97], [20.25, 30.5], [20.38, 30.8], [19.97, 30.97], [19.75, 31.5]]]]}, "2018-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.0, 32.75], [22.53, 32.53], [22.75, 32.0], [22.53, 31.47], [22.18, 31.32], [22.03, 30.97], [21.5, 30.75], [20.97, 30.97], [20.75, 31.5], [20.97, 32.03], [21.32, 32.18], [21.47, 32.53], [22.0, 32.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.909990716421419}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.318534639213627}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.69149512621584, 19.744371234855123, 21.78762092151061, 21.915112062489868, 21.40465875250743, 21.47859819156588]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.208311667578243, 16.6415782685051, 18.637261087349145, 19.595431969265576, 20.38000470906644, 21.170592648057777]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.139105732752252, -6.796248725360552, -4.520664155868676, -3.5179348512636555, -3.5833716052664992, -2.8971033240637496]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.071810787583672, -9.909990716421419, -6.794572502624362, -4.57651459399608, -4.479328196435802, -3.0102069824422983]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.95040757075586, -2.571887311910087, -1.6893387705448137, -1.510943748454162, -1.5755424886301392, -1.292864811044892]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.3849748858428415, -3.7086776603221843, -2.4559173474005696, -1.9637887066279072, -1.8958529263932076, -1.3191101650164474]}}