{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:52.792203", "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": "2019-Jan-04_to_2019-Jan-08_24.0_38.0"}, "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": 2019010000185}, "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": "January 04 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 08 2019"}, "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": 95156.02365367746}, "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": ["Greece"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": ["Aegean Sea", "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": 38.0}, "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": 24.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.0, 38.75], [24.53, 38.53], [24.75, 38.0], [24.53, 37.47], [24.0, 37.25], [23.47, 37.47], [23.25, 38.0], [23.47, 38.53], [24.0, 38.75]]]]}, "2019-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, 37.0], [22.47, 37.53], [23.0, 37.75], [23.25, 37.65], [23.32, 37.68], [23.35, 37.75], [23.25, 38.0], [23.47, 38.53], [24.0, 38.75], [24.53, 38.53], [24.68, 38.18], [25.03, 38.03], [25.18, 37.68], [25.53, 37.53], [25.75, 37.0], [25.63, 36.7], [25.75, 36.65], [26.0, 36.75], [26.25, 36.65], [26.5, 36.75], [27.03, 36.53], [27.25, 36.0], [27.04, 35.5], [27.18, 35.18], [27.25, 35.15], [27.5, 35.25], [28.03, 35.03], [28.25, 34.5], [28.15, 34.25], [28.25, 34.0], [28.03, 33.47], [27.5, 33.25], [27.25, 33.35], [27.0, 33.25], [26.47, 33.47], [26.25, 34.0], [26.35, 34.25], [26.32, 34.32], [26.25, 34.35], [26.0, 34.25], [25.75, 34.35], [25.5, 34.25], [24.97, 34.47], [24.82, 34.82], [24.47, 34.97], [24.32, 35.32], [23.97, 35.47], [23.82, 35.82], [23.75, 35.85], [23.5, 35.75], [22.97, 35.97], [22.82, 36.32], [22.47, 36.47], [22.25, 37.0]]]]}, "2019-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, 37.0], [22.47, 37.53], [23.0, 37.75], [23.25, 37.65], [23.32, 37.68], [23.35, 37.75], [23.25, 38.0], [23.47, 38.53], [24.0, 38.75], [24.53, 38.53], [24.68, 38.18], [25.03, 38.03], [25.18, 37.68], [25.53, 37.53], [25.68, 37.18], [26.0, 37.04], [26.5, 37.25], [26.75, 37.15], [27.0, 37.25], [27.53, 37.03], [27.75, 36.5], [27.65, 36.25], [27.7, 36.13], [28.0, 36.25], [28.25, 36.15], [28.5, 36.25], [29.03, 36.03], [29.18, 35.68], [29.53, 35.53], [29.75, 35.0], [29.53, 34.47], [29.0, 34.25], [28.75, 34.35], [28.68, 34.32], [28.53, 33.97], [28.18, 33.82], [28.03, 33.47], [27.5, 33.25], [27.25, 33.35], [27.0, 33.25], [26.47, 33.47], [26.25, 34.0], [26.35, 34.25], [26.32, 34.32], [26.25, 34.35], [26.0, 34.25], [25.75, 34.35], [25.5, 34.25], [24.97, 34.47], [24.82, 34.82], [24.47, 34.97], [24.32, 35.32], [23.97, 35.47], [23.82, 35.82], [23.75, 35.85], [23.5, 35.75], [22.97, 35.97], [22.82, 36.32], [22.47, 36.47], [22.25, 37.0]]]]}, "2019-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, 37.0], [22.47, 37.53], [23.0, 37.75], [23.25, 37.65], [23.32, 37.68], [23.35, 37.75], [23.25, 38.0], [23.47, 38.53], [24.0, 38.75], [24.53, 38.53], [24.68, 38.18], [25.03, 38.03], [25.18, 37.68], [25.53, 37.53], [25.68, 37.18], [26.0, 37.04], [26.5, 37.25], [26.75, 37.15], [27.0, 37.25], [27.53, 37.03], [27.75, 36.5], [27.65, 36.25], [27.7, 36.13], [28.0, 36.25], [28.25, 36.15], [28.5, 36.25], [29.03, 36.03], [29.18, 35.68], [29.53, 35.53], [29.75, 35.0], [29.53, 34.47], [29.0, 34.25], [28.75, 34.35], [28.68, 34.32], [28.53, 33.97], [28.18, 33.82], [28.03, 33.47], [27.5, 33.25], [27.25, 33.35], [27.0, 33.25], [26.47, 33.47], [26.25, 34.0], [26.35, 34.25], [26.32, 34.32], [26.25, 34.35], [26.0, 34.25], [25.75, 34.35], [25.5, 34.25], [24.97, 34.47], [24.82, 34.82], [24.47, 34.97], [24.32, 35.32], [23.97, 35.47], [23.82, 35.82], [23.75, 35.85], [23.5, 35.75], [22.97, 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