{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:12.934730", "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": "2023-Apr-03_to_2023-Apr-07_42.0_-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": 2023040000215}, "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 03 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 07 2023"}, "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": 177071.78014439653}, "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": ["Mozambique"]}, "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": ["Comoro", "Comoro Basin", "Indian Ocean"]}, "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": 42.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "42.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 39.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 45.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -16.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[39.47, -11.97], [39.82, -11.82], [39.85, -11.75], [39.75, -11.5], [39.97, -10.97], [40.32, -10.82], [40.35, -10.75], [40.25, -10.5], [40.47, -9.97], [41.0, -9.75], [41.25, -9.85], [41.5, -9.75], [42.03, -9.97], [42.25, -10.5], [42.15, -10.75], [42.25, -11.0], [42.15, -11.25], [42.25, -11.5], [42.15, -11.75], [42.25, -12.0], [42.13, -12.3], [42.5, -12.46], [43.0, -12.25], [43.25, -12.35], [43.5, -12.25], [43.75, -12.35], [44.0, -12.25], [44.25, -12.35], [44.5, -12.25], [45.03, -12.47], [45.18, -12.82], [45.53, -12.97], [45.75, -13.5], [45.53, -14.03], [45.0, -14.25], [44.7, -14.12], [44.65, -14.25], [44.75, -14.5], [44.53, -15.03], [44.18, -15.18], [44.03, -15.53], [43.68, -15.68], [43.53, -16.03], [43.18, -16.18], [43.15, -16.25], [43.25, -16.5], [43.03, -17.03], [42.5, -17.25], [42.25, -17.15], [42.0, -17.25], [41.47, -17.03], [41.32, -16.68], [40.97, -16.53], [40.75, -16.0], [40.85, -15.75], [40.75, -15.5], [40.85, -15.25], [40.82, -15.18], [40.47, -15.03], [40.32, -14.68], [40.25, -14.65], [40.0, -14.75], [39.47, -14.53], [39.32, -14.18], [38.97, -14.03], [38.75, -13.5], [38.97, -12.97], [39.38, -12.8], [39.25, -12.5], [39.47, -11.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Eastern-Africa", "E.Southern-Africa", "Madagascar"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.47, -12.97], [45.0, -12.75], [45.53, -12.97], [45.75, -13.5], [45.53, -14.03], [45.0, -14.25], [44.47, -14.03], [44.25, -13.5], [44.47, -12.97]]]]}, "2023-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.25, -12.5], [39.47, -11.97], [39.82, -11.82], [39.85, -11.75], [39.75, -11.5], [39.97, -10.97], [40.32, -10.82], [40.35, -10.75], [40.25, -10.5], [40.47, -9.97], [41.0, -9.75], [41.53, -9.97], [41.68, -10.32], [42.03, -10.47], [42.25, -11.0], [42.03, -11.53], [41.5, -11.75], [41.25, -11.65], [41.18, -11.68], [41.15, -11.75], [41.25, -12.0], [41.15, -12.25], [41.18, -12.32], [41.25, -12.35], [41.5, -12.25], [41.75, -12.35], [42.0, -12.25], [42.5, -12.46], [43.0, -12.25], [43.25, -12.35], [43.5, -12.25], [43.75, -12.35], [44.0, -12.25], [44.25, -12.35], [44.5, -12.25], [45.03, -12.47], [45.18, -12.82], [45.53, -12.97], [45.75, -13.5], [45.53, -14.03], [45.0, -14.25], [44.7, -14.12], [44.65, -14.25], [44.75, -14.5], [44.53, -15.03], [44.18, -15.18], [44.03, -15.53], [43.68, -15.68], [43.53, -16.03], [43.0, -16.25], [42.75, -16.15], [42.5, -16.25], [42.25, -16.15], [42.18, -16.18], [42.03, -16.53], [41.5, -16.75], [40.97, -16.53], [40.75, -16.0], [40.85, -15.75], [40.75, -15.5], [40.85, -15.25], [40.82, -15.18], [40.47, -15.03], [40.25, -14.5], [40.35, -14.25], [40.32, -14.18], [40.0, -14.04], [39.5, -14.25], [38.97, -14.03], [38.75, -13.5], [38.97, -12.97], [39.38, -12.8], [39.25, -12.5]]]]}, "2023-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.97, -14.03], [38.75, -13.5], [38.97, -12.97], [39.38, -12.8], [39.25, -12.5], [39.47, -11.97], [39.82, -11.82], [39.85, -11.75], [39.75, -11.5], [39.97, -10.97], [40.32, -10.82], [40.35, -10.75], [40.25, -10.5], [40.47, -9.97], [41.0, -9.75], [41.25, -9.85], [41.5, -9.75], [42.03, -9.97], [42.25, -10.5], [42.15, -10.75], [42.25, -11.0], [42.15, -11.25], [42.25, -11.5], [42.15, -11.75], [42.25, -12.0], [42.13, -12.3], [42.5, -12.46], [43.0, -12.25], [43.25, -12.35], [43.5, -12.25], [43.75, -12.35], [44.0, -12.25], [44.25, -12.35], [44.5, -12.25], [45.03, -12.47], [45.18, -12.82], [45.53, -12.97], [45.75, -13.5], [45.53, -14.03], [45.0, -14.25], [44.7, -14.12], [44.65, -14.25], [44.75, -14.5], [44.53, -15.03], [44.18, -15.18], [44.03, -15.53], [43.68, -15.68], [43.53, -16.03], [43.18, -16.18], [43.15, -16.25], [43.25, -16.5], [43.03, -17.03], [42.5, -17.25], [42.25, -17.15], [42.0, -17.25], [41.47, -17.03], [41.32, -16.68], [40.97, -16.53], [40.75, -16.0], [40.85, -15.75], [40.75, -15.5], [40.85, -15.25], [40.82, -15.18], [40.47, -15.03], [40.32, -14.68], [40.25, -14.65], [40.0, -14.75], [39.47, -14.53], [39.32, -14.18], [38.97, -14.03]]]]}, "2023-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.97, -14.03], [38.75, -13.5], [38.97, -12.97], [39.38, -12.8], [39.25, -12.5], [39.47, -11.97], [39.82, -11.82], [39.85, -11.75], [39.75, -11.5], [39.97, -10.97], [40.32, -10.82], [40.35, -10.75], [40.25, -10.5], [40.47, -9.97], [41.0, -9.75], [41.25, -9.85], [41.5, -9.75], [42.03, -9.97], [42.25, -10.5], [42.15, -10.75], [42.25, -11.0], [42.15, -11.25], [42.25, -11.5], [42.15, -11.75], [42.25, -12.0], [42.13, -12.3], [42.5, -12.46], [43.0, -12.25], [43.25, -12.35], [43.5, -12.25], [43.75, -12.35], [44.0, -12.25], [44.25, -12.35], [44.5, -12.25], [45.03, -12.47], [45.25, -13.0], [45.03, -13.53], [44.68, -13.68], [44.65, -13.75], [44.75, -14.0], [44.65, -14.25], [44.75, -14.5], [44.53, -15.03], [44.18, -15.18], [44.03, -15.53], [43.68, -15.68], [43.53, -16.03], [43.18, -16.18], [43.15, -16.25], [43.25, -16.5], [43.03, -17.03], [42.5, -17.25], [42.25, -17.15], [42.0, -17.25], [41.47, -17.03], [41.32, -16.68], [40.97, -16.53], [40.75, -16.0], [40.85, -15.75], [40.75, -15.5], [40.85, -15.25], [40.82, -15.18], [40.47, -15.03], [40.32, -14.68], [40.25, -14.65], [40.0, -14.75], [39.47, -14.53], [39.32, -14.18], [38.97, -14.03]]]]}, "2023-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.25, -13.5], [39.46, -13.0], [39.25, -12.5], [39.47, -11.97], [40.0, -11.75], [40.53, -11.97], [40.68, -12.32], [40.93, -12.43], [40.75, -12.0], [40.85, -11.75], [40.82, -11.68], [40.47, -11.53], [40.25, -11.0], [40.35, -10.75], [40.25, -10.5], [40.47, -9.97], [41.0, -9.75], [41.25, -9.85], [41.5, -9.75], [42.03, -9.97], [42.25, -10.5], [42.04, -11.0], [42.25, -11.5], [42.15, -11.75], [42.25, -12.0], [42.03, -12.53], [41.5, -12.75], [41.07, -12.57], [41.25, -13.0], [41.15, -13.25], [41.2, -13.37], [41.5, -13.25], [41.75, -13.35], [42.0, -13.25], [42.25, -13.35], [42.5, -13.25], [43.03, -13.47], [43.25, -14.0], [43.15, -14.25], [43.25, -14.5], [43.15, -14.75], [43.18, -14.82], [43.53, -14.97], [43.75, -15.5], [43.53, -16.03], [43.18, -16.18], [43.15, -16.25], [43.25, -16.5], [43.03, -17.03], [42.5, -17.25], [42.25, -17.15], [42.0, -17.25], [41.47, -17.03], [41.32, -16.68], [40.97, -16.53], [40.75, -16.0], [40.85, -15.75], [40.75, -15.5], [40.85, -15.25], [40.75, -15.0], [40.85, -14.75], [40.8, -14.62], [40.5, -14.75], [40.25, -14.65], [40.0, -14.75], [39.47, -14.53], [39.25, -14.0], [39.35, -13.75], [39.25, -13.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.677337509817221}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.133299322177167}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.783000958368063, 26.24060959956853, 25.973934987597943, 25.876711875892283, 25.96758919536785]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.783000958368063, 23.764283306288405, 23.62462890391822, 23.30808384088982, 23.582231184085515]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8633042853772963, -0.9847380103615994, -1.1888538300140026, -1.260919038641442, -1.025362763503424]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.8633042853772963, -1.371262898763291, -1.5762255338784712, -1.677337509817221, -1.5648131083988233]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.335951921367009, -1.5144542850718241, -1.7903211383829665, -1.9123801431005825, -1.4634834956178717]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.335951921367009, -1.7855058931683034, -2.3779927083830232, -2.4307106880983538, -1.8930762247219048]}}