{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:14.335602", "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": "2017-Jun-17_to_2017-Jun-22_3.5_14.5"}, "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": 2017060000520}, "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": "June 17 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 22 2017"}, "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": 53735.12137153139}, "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": ["Mali", "Niger"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-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": 14.5}, "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": 3.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "3.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 2.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.35, 13.75], [2.25, 14.0], [2.35, 14.25], [2.25, 14.5], [2.47, 15.03], [3.0, 15.25], [3.25, 15.15], [3.5, 15.25], [4.03, 15.03], [4.25, 14.5], [4.15, 14.25], [4.25, 14.0], [4.03, 13.47], [3.68, 13.32], [3.65, 13.25], [3.75, 13.0], [3.53, 12.47], [3.0, 12.25], [2.47, 12.47], [2.25, 13.0], [2.35, 13.25], [2.25, 13.5], [2.35, 13.75]]]]}, "2017-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.35, 13.75], [2.25, 14.0], [2.35, 14.25], [2.25, 14.5], [2.47, 15.03], [3.0, 15.25], [3.25, 15.15], [3.5, 15.25], [4.03, 15.03], [4.25, 14.5], [4.15, 14.25], [4.25, 14.0], [4.03, 13.47], [3.68, 13.32], [3.65, 13.25], [3.75, 13.0], [3.53, 12.47], [3.0, 12.25], [2.47, 12.47], [2.25, 13.0], [2.35, 13.25], [2.25, 13.5], [2.35, 13.75]]]]}, "2017-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.35, 13.75], [2.25, 14.0], [2.35, 14.25], [2.25, 14.5], [2.47, 15.03], [2.82, 15.18], [2.97, 15.53], [3.5, 15.75], [3.75, 15.65], [3.82, 15.68], [3.97, 16.03], [4.5, 16.25], [5.03, 16.03], [5.25, 15.5], [5.03, 14.97], [4.68, 14.82], [4.53, 14.47], [4.18, 14.32], [4.15, 14.25], [4.25, 14.0], [4.03, 13.47], [3.68, 13.32], [3.65, 13.25], [3.75, 13.0], [3.53, 12.47], [3.0, 12.25], [2.47, 12.47], [2.25, 13.0], [2.35, 13.25], [2.25, 13.5], [2.35, 13.75]]]]}, "2017-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.75, 16.5], [1.97, 17.03], [2.5, 17.25], [2.75, 17.15], [3.0, 17.25], [3.25, 17.15], [3.5, 17.25], [4.03, 17.03], [4.25, 16.5], [4.15, 16.25], [4.2, 16.13], [4.5, 16.25], [5.03, 16.03], [5.25, 15.5], [5.04, 15.0], [5.25, 14.5], [5.03, 13.97], [4.5, 13.75], [4.25, 13.85], [4.18, 13.82], [4.03, 13.47], [3.68, 13.32], [3.65, 13.25], [3.75, 13.0], [3.53, 12.47], [3.0, 12.25], [2.47, 12.47], [2.25, 13.0], [2.35, 13.25], [2.25, 13.5], [2.35, 13.75], [2.25, 14.0], [2.35, 14.25], [2.25, 14.5], [2.35, 14.75], [2.25, 15.0], [2.35, 15.25], [2.25, 15.5], [2.35, 15.75], [2.32, 15.82], [1.97, 15.97], [1.75, 16.5]]]]}, "2017-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.75, 16.5], [1.97, 17.03], [2.5, 17.25], [2.75, 17.15], [3.0, 17.25], [3.25, 17.15], [3.5, 17.25], [4.03, 17.03], [4.25, 16.5], [4.15, 16.25], [4.2, 16.13], [4.5, 16.25], [5.03, 16.03], [5.25, 15.5], [5.04, 15.0], [5.25, 14.5], [5.03, 13.97], [4.5, 13.75], [4.25, 13.85], [4.18, 13.82], [4.03, 13.47], [3.68, 13.32], [3.53, 12.97], [3.0, 12.75], [2.47, 12.97], [2.25, 13.5], [2.35, 13.75], [2.25, 14.0], [2.35, 14.25], [2.25, 14.5], [2.35, 14.75], [2.25, 15.0], [2.35, 15.25], [2.25, 15.5], [2.35, 15.75], [2.32, 15.82], [1.97, 15.97], [1.75, 16.5]]]]}, "2017-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.75, 16.5], [1.97, 17.03], [2.5, 17.25], [2.75, 17.15], [3.0, 17.25], [3.25, 17.15], [3.5, 17.25], [4.03, 17.03], [4.25, 16.5], [4.15, 16.25], [4.25, 16.0], [4.13, 15.7], [4.53, 15.53], [4.68, 15.18], [5.03, 15.03], [5.25, 14.5], [5.03, 13.97], [4.5, 13.75], [4.25, 13.85], [4.0, 13.75], [3.47, 13.97], [3.32, 14.32], [3.25, 14.35], [3.0, 14.25], [2.47, 14.47], [2.25, 15.0], [2.35, 15.25], [2.25, 15.5], [2.35, 15.75], [2.32, 15.82], [1.97, 15.97], [1.75, 16.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.170316708793564}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.340423876230822}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.40702637237382, 30.242602220794026, 30.78092012078156, 29.57805238862187, 29.428673240082503, 31.748755132201723]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.908571834142265, 29.512084277327062, 29.592243094702837, 27.728172483088144, 29.109525688179247, 30.384420589690592]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.364841349278805, -2.418496901929558, -2.1443558219163616, -4.020457878339467, -4.223223284675963, -2.3314663775787134]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7925454542642, -2.586516618917699, -2.4324348046455384, -5.253379663086207, -6.170316708793564, -3.258658898665601]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2892483939147326, -1.5943966810518022, -1.485648283848767, -2.775546107722433, -2.8983552662254706, -1.5917819345961375]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5458706435143537, -1.737349889889123, -1.6129600488247375, -3.796427645066415, -4.131185796383009, -2.16030409312299]}}