{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:21.845176", "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": "2024-Oct-19_to_2024-Oct-23_1.5_29.5"}, "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": 2024100000390}, "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": "October 19 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 23 2024"}, "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": 84087.66554729077}, "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"]}, "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": 29.5}, "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": 1.5}, "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": -0.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 3.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[0.97, 30.53], [1.5, 30.75], [1.75, 30.65], [2.0, 30.75], [2.53, 30.53], [2.68, 30.18], [2.75, 30.15], [3.0, 30.25], [3.53, 30.03], [3.75, 29.5], [3.53, 28.97], [3.18, 28.82], [3.15, 28.75], [3.25, 28.5], [3.03, 27.97], [2.68, 27.82], [2.53, 27.47], [2.0, 27.25], [1.75, 27.35], [1.68, 27.32], [1.53, 26.97], [1.0, 26.75], [0.75, 26.85], [0.68, 26.82], [0.53, 26.47], [0.0, 26.25], [-0.53, 26.47], [-0.75, 27.0], [-0.65, 27.25], [-0.68, 27.32], [-1.03, 27.47], [-1.25, 28.0], [-1.15, 28.25], [-1.25, 28.5], [-1.03, 29.03], [-0.68, 29.18], [-0.53, 29.53], [-0.18, 29.68], [-0.03, 30.03], [0.5, 30.25], [0.75, 30.15], [0.82, 30.18], [0.97, 30.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.75, 30.0], [0.97, 30.53], [1.5, 30.75], [1.75, 30.65], [2.0, 30.75], [2.53, 30.53], [2.75, 30.0], [2.53, 29.47], [2.18, 29.32], [2.03, 28.97], [1.5, 28.75], [0.97, 28.97], [0.75, 29.5], [0.85, 29.75], [0.75, 30.0]]]]}, "2024-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.25, 28.5], [-1.03, 29.03], [-0.68, 29.18], [-0.53, 29.53], [-0.18, 29.68], [-0.03, 30.03], [0.5, 30.25], [0.75, 30.15], [0.82, 30.18], [0.97, 30.53], [1.5, 30.75], [1.75, 30.65], [2.0, 30.75], [2.53, 30.53], [2.68, 30.18], [2.75, 30.15], [3.0, 30.25], [3.53, 30.03], [3.75, 29.5], [3.53, 28.97], [3.18, 28.82], [3.15, 28.75], [3.25, 28.5], [3.03, 27.97], [2.68, 27.82], [2.53, 27.47], [2.0, 27.25], [1.75, 27.35], [1.68, 27.32], [1.53, 26.97], [1.0, 26.75], [0.75, 26.85], [0.5, 26.75], [0.25, 26.85], [0.0, 26.75], [-0.53, 26.97], [-0.68, 27.32], [-1.03, 27.47], [-1.25, 28.0], [-1.15, 28.25], [-1.25, 28.5]]]]}, "2024-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.25, 28.5], [-1.03, 29.03], [-0.68, 29.18], [-0.53, 29.53], [-0.18, 29.68], [-0.03, 30.03], [0.5, 30.25], [0.75, 30.15], [0.82, 30.18], [0.97, 30.53], [1.5, 30.75], [1.75, 30.65], [2.0, 30.75], [2.53, 30.53], [2.68, 30.18], [2.75, 30.15], [3.0, 30.25], [3.53, 30.03], [3.75, 29.5], [3.53, 28.97], [3.18, 28.82], [3.15, 28.75], [3.25, 28.5], [3.03, 27.97], [2.68, 27.82], [2.53, 27.47], [2.0, 27.25], [1.75, 27.35], [1.68, 27.32], [1.53, 26.97], [1.0, 26.75], [0.75, 26.85], [0.68, 26.82], [0.53, 26.47], [0.0, 26.25], [-0.53, 26.47], [-0.75, 27.0], [-0.65, 27.25], [-0.68, 27.32], [-1.03, 27.47], [-1.25, 28.0], [-1.15, 28.25], [-1.25, 28.5]]]]}, "2024-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.25, 28.5], [-1.03, 29.03], [-0.68, 29.18], [-0.53, 29.53], [-0.18, 29.68], [-0.03, 30.03], [0.5, 30.25], [0.75, 30.15], [0.82, 30.18], [0.97, 30.53], [1.5, 30.75], [1.75, 30.65], [2.0, 30.75], [2.53, 30.53], [2.68, 30.18], [2.75, 30.15], [3.0, 30.25], [3.53, 30.03], [3.75, 29.5], [3.53, 28.97], [3.18, 28.82], [3.15, 28.75], [3.25, 28.5], [3.03, 27.97], [2.68, 27.82], [2.53, 27.47], [2.0, 27.25], [1.75, 27.35], [1.68, 27.32], [1.53, 26.97], [1.0, 26.75], [0.75, 26.85], [0.68, 26.82], [0.53, 26.47], [0.0, 26.25], [-0.53, 26.47], [-0.75, 27.0], [-0.65, 27.25], [-0.68, 27.32], [-1.03, 27.47], [-1.25, 28.0], [-1.15, 28.25], [-1.25, 28.5]]]]}, "2024-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.75, 27.5], [-0.65, 27.75], [-0.75, 28.0], [-0.53, 28.53], [-0.18, 28.68], [-0.15, 28.75], [-0.25, 29.0], [-0.03, 29.53], [0.32, 29.68], [0.47, 30.03], [1.0, 30.25], [1.25, 30.15], [1.5, 30.25], [2.03, 30.03], [2.25, 29.5], [2.15, 29.25], [2.18, 29.18], [2.53, 29.03], [2.75, 28.5], [2.65, 28.25], [2.75, 28.0], [2.53, 27.47], [2.0, 27.25], [1.75, 27.35], [1.68, 27.32], [1.53, 26.97], [1.0, 26.75], [0.75, 26.85], [0.68, 26.82], [0.53, 26.47], [0.0, 26.25], [-0.53, 26.47], [-0.75, 27.0], [-0.65, 27.25], [-0.75, 27.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.608443681901292}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.406544486741427}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.52278544108077, 20.098280298142242, 20.451101930114135, 20.270244282689646, 21.264304380063663]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.076089477539085, 17.891426340738974, 18.642510986328148, 18.620117441813193, 19.82532145182296]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.289615806622976, -4.871378410388784, -4.385820740395065, -4.355533546522438, -3.818530158331681]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.4029247550677155, -5.608443681901292, -4.839237714197338, -4.9835683293679836, -4.200004846512854]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.412242825602496, -1.6810280997230598, -1.5407479167992397, -1.5515359910481092, -1.4245220033178891]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4245653465611625, -1.822315103111316, -1.6900693371421511, -1.772758070382226, -1.5368998480822078]}}