{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:40.013552", "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-12_to_2018-May-15_1.5_43.5"}, "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": 2018050000584}, "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 12 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 15 2018"}, "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": 93336.32490938375}, "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": ["France", "Spain"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "West&Central-Europe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 43.5}, "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": 361.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 356.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 363.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.25, 43.0], [-4.03, 43.53], [-3.5, 43.75], [-3.25, 43.65], [-3.0, 43.75], [-2.75, 43.65], [-2.5, 43.75], [-2.25, 43.65], [-2.18, 43.68], [-2.03, 44.03], [-1.68, 44.18], [-1.65, 44.25], [-1.75, 44.5], [-1.65, 44.75], [-1.75, 45.0], [-1.53, 45.53], [-1.18, 45.68], [-1.03, 46.03], [-0.68, 46.18], [-0.53, 46.53], [0.0, 46.75], [0.25, 46.65], [0.32, 46.68], [0.47, 47.03], [1.0, 47.25], [1.53, 47.03], [1.75, 46.5], [1.53, 45.97], [1.18, 45.82], [1.15, 45.75], [1.25, 45.5], [1.15, 45.25], [1.18, 45.18], [1.53, 45.03], [1.75, 44.5], [1.65, 44.25], [1.68, 44.18], [2.03, 44.03], [2.25, 43.5], [2.03, 42.97], [1.5, 42.75], [1.25, 42.85], [1.0, 42.75], [0.75, 42.85], [0.5, 42.75], [0.25, 42.85], [0.0, 42.75], [-0.25, 42.85], [-0.32, 42.82], [-0.47, 42.47], [-0.82, 42.32], [-0.97, 41.97], [-1.5, 41.75], [-1.75, 41.85], [-2.0, 41.75], [-2.25, 41.85], [-2.5, 41.75], [-2.75, 41.85], [-3.0, 41.75], [-3.53, 41.97], [-3.68, 42.32], [-4.03, 42.47], [-4.25, 43.0]]]]}, "2018-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.25, 43.0], [-4.03, 43.53], [-3.5, 43.75], [-3.25, 43.65], [-3.0, 43.75], [-2.75, 43.65], [-2.5, 43.75], [-2.25, 43.65], [-2.18, 43.68], [-2.03, 44.03], [-1.68, 44.18], [-1.65, 44.25], [-1.75, 44.5], [-1.65, 44.75], [-1.75, 45.0], [-1.53, 45.53], [-1.18, 45.68], [-1.03, 46.03], [-0.68, 46.18], [-0.53, 46.53], [0.0, 46.75], [0.25, 46.65], [0.32, 46.68], [0.47, 47.03], [1.0, 47.25], [1.53, 47.03], [1.75, 46.5], [1.53, 45.97], [1.18, 45.82], [1.15, 45.75], [1.25, 45.5], [1.15, 45.25], [1.18, 45.18], [1.53, 45.03], [1.7, 44.62], [2.0, 44.75], [2.25, 44.65], [2.5, 44.75], [2.75, 44.65], [3.0, 44.75], [3.53, 44.53], [3.75, 44.0], [3.53, 43.47], [3.18, 43.32], [3.03, 42.97], [2.5, 42.75], [2.25, 42.85], [2.0, 42.75], [1.75, 42.85], [1.5, 42.75], [1.25, 42.85], [1.0, 42.75], [0.75, 42.85], [0.5, 42.75], [0.25, 42.85], [0.0, 42.75], [-0.25, 42.85], [-0.32, 42.82], [-0.47, 42.47], [-0.82, 42.32], [-0.97, 41.97], [-1.5, 41.75], [-1.75, 41.85], [-2.0, 41.75], [-2.25, 41.85], [-2.5, 41.75], [-2.75, 41.85], [-3.0, 41.75], [-3.53, 41.97], [-3.68, 42.32], [-4.03, 42.47], [-4.25, 43.0]]]]}, "2018-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.25, 43.0], [-4.03, 43.53], [-3.5, 43.75], [-3.25, 43.65], [-3.0, 43.75], [-2.75, 43.65], [-2.5, 43.75], [-2.25, 43.65], [-2.18, 43.68], [-2.03, 44.03], [-1.68, 44.18], [-1.65, 44.25], [-1.75, 44.5], [-1.65, 44.75], [-1.75, 45.0], [-1.53, 45.53], [-1.18, 45.68], [-1.03, 46.03], [-0.68, 46.18], [-0.53, 46.53], [0.0, 46.75], [0.25, 46.65], [0.32, 46.68], [0.47, 47.03], [1.0, 47.25], [1.53, 47.03], [1.75, 46.5], [1.53, 45.97], [1.18, 45.82], [1.15, 45.75], [1.25, 45.5], [1.15, 45.25], [1.18, 45.18], [1.53, 45.03], [1.7, 44.62], [2.0, 44.75], [2.25, 44.65], [2.5, 44.75], [2.75, 44.65], [3.0, 44.75], [3.53, 44.53], [3.75, 44.0], [3.53, 43.47], [3.18, 43.32], [3.03, 42.97], [2.5, 42.75], [2.25, 42.85], [2.0, 42.75], [1.75, 42.85], [1.5, 42.75], [1.25, 42.85], [1.0, 42.75], [0.75, 42.85], [0.5, 42.75], [0.25, 42.85], [0.0, 42.75], [-0.25, 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amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.932102821544386}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.72360395879815, 9.161626662083108, 9.93483214898805, 10.765179145687284]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.509794767729829, 5.098827632575649, 5.953559931216944, 8.984532789033722]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.230051885110823, -5.722708891196519, -4.965811759663793, -3.9715088572818393]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.943336436650043, -7.404019666148827, -6.744848526809278, -4.201572377770503]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.457546110454843, -1.9543322066853297, -1.6629600639881421, -1.3788308487700884]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6689618220678144, -2.821484968561803, -2.4905710615221475, -1.507877537401237]}}