{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:43.339395", "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": "2015-Apr-15_to_2015-Apr-18_45.0_6.5"}, "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": 2015040000629}, "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 15 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 18 2015"}, "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": 114010.43530325776}, "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": ["Ethiopia", "Somalia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "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": 6.5}, "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": 45.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "45.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 45.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.0, 6.25], [43.25, 6.15], [43.5, 6.25], [44.03, 6.03], [44.25, 5.5], [44.03, 4.97], [43.68, 4.82], [43.53, 4.47], [43.0, 4.25], [42.47, 4.47], [42.25, 5.0], [42.35, 5.25], [42.25, 5.5], [42.47, 6.03], [43.0, 6.25]]], [[[44.97, 5.97], [44.75, 6.5], [44.97, 7.03], [45.5, 7.25], [46.03, 7.03], [46.25, 6.5], [46.03, 5.97], [45.5, 5.75], [44.97, 5.97]]]]}, "2015-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.32, 3.68], [41.35, 3.75], [41.25, 4.0], [41.47, 4.53], [41.82, 4.68], [41.97, 5.03], [42.32, 5.18], [42.35, 5.25], [42.25, 5.5], [42.47, 6.03], [43.0, 6.25], [43.25, 6.15], [43.38, 6.2], [43.25, 6.5], [43.47, 7.03], [44.0, 7.25], [44.25, 7.15], [44.5, 7.25], [44.75, 7.15], [45.0, 7.25], [45.25, 7.15], [45.5, 7.25], [46.03, 7.03], [46.25, 6.5], [46.03, 5.97], [45.68, 5.82], [45.53, 5.47], [45.18, 5.32], [45.15, 5.25], [45.25, 5.0], [45.04, 4.5], [45.25, 4.0], [45.03, 3.47], [44.68, 3.32], [44.53, 2.97], [44.18, 2.82], [44.03, 2.47], [43.68, 2.32], [43.53, 1.97], [43.0, 1.75], [42.75, 1.85], [42.5, 1.75], [41.97, 1.97], [41.82, 2.32], [41.75, 2.35], [41.68, 2.32], [41.53, 1.97], [41.0, 1.75], [40.47, 1.97], [40.25, 2.5], [40.47, 3.03], [40.82, 3.18], [40.97, 3.53], [41.32, 3.68]]]]}, "2015-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.32, 3.68], [41.35, 3.75], [41.25, 4.0], [41.47, 4.53], [41.82, 4.68], [41.97, 5.03], [42.32, 5.18], [42.35, 5.25], [42.25, 5.5], [42.47, 6.03], [43.0, 6.25], [43.25, 6.15], [43.38, 6.2], [43.25, 6.5], [43.47, 7.03], [44.0, 7.25], [44.25, 7.15], [44.5, 7.25], [44.75, 7.15], [45.0, 7.25], [45.25, 7.15], [45.5, 7.25], [46.03, 7.03], [46.25, 6.5], [46.03, 5.97], [45.68, 5.82], [45.53, 5.47], [45.18, 5.32], [45.15, 5.25], [45.25, 5.0], [45.04, 4.5], [45.25, 4.0], [45.03, 3.47], [44.68, 3.32], [44.53, 2.97], [44.18, 2.82], [44.03, 2.47], [43.68, 2.32], [43.53, 1.97], [43.0, 1.75], [42.75, 1.85], [42.5, 1.75], [41.97, 1.97], [41.82, 2.32], [41.75, 2.35], [41.68, 2.32], [41.53, 1.97], [41.0, 1.75], [40.47, 1.97], [40.25, 2.5], [40.47, 3.03], [40.82, 3.18], [40.97, 3.53], [41.32, 3.68]]]]}, "2015-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.32, 3.68], [41.35, 3.75], [41.25, 4.0], [41.47, 4.53], [41.82, 4.68], [41.97, 5.03], [42.32, 5.18], [42.35, 5.25], [42.25, 5.5], [42.47, 6.03], [43.0, 6.25], [43.25, 6.15], [43.38, 6.2], [43.25, 6.5], [43.47, 7.03], [44.0, 7.25], [44.25, 7.15], [44.5, 7.25], [44.75, 7.15], [45.0, 7.25], [45.53, 7.03], [45.75, 6.5], [45.65, 6.25], [45.75, 6.0], [45.53, 5.47], [45.18, 5.32], [45.15, 5.25], [45.25, 5.0], [45.04, 4.5], [45.25, 4.0], [45.03, 3.47], [44.68, 3.32], [44.53, 2.97], [44.18, 2.82], [44.03, 2.47], [43.68, 2.32], [43.53, 1.97], [43.0, 1.75], [42.75, 1.85], [42.5, 1.75], [41.97, 1.97], [41.82, 2.32], [41.75, 2.35], [41.68, 2.32], [41.53, 1.97], [41.0, 1.75], [40.47, 1.97], [40.25, 2.5], [40.47, 3.03], [40.82, 3.18], [40.97, 3.53], [41.32, 3.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.790905131602813}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.9137373492656016}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.60733496311974, 24.74704252517091, 25.374531028372758, 25.737785463368084]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.2967000728608, 23.09060112805031, 23.409280541208318, 24.27622811262421]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5674856455056982, -3.6102245433358293, -2.8275165320208044, -2.3249915401683428]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.662120346797167, -4.790905131602813, -4.662619284391326, 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