{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:31.286366", "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": "2021-Mar-04_to_2021-Mar-07_45.5_-20.5"}, "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": 2021030000230}, "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": "March 04 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 07 2021"}, "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": 67110.72117195319}, "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": ["Madagascar"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "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": -20.5}, "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": 45.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "45.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 44.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 46.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.25}, "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": {"2021-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.85, -17.75], [43.75, -17.5], [43.97, -16.97], [44.32, -16.82], [44.47, -16.47], [45.0, -16.25], [45.53, -16.47], [45.75, -17.0], [45.65, -17.25], [45.68, -17.32], [46.03, -17.47], [46.25, -18.0], [46.15, -18.25], [46.25, -18.5], [46.15, -18.75], [46.18, -18.82], [46.25, -18.85], [46.5, -18.75], [47.03, -18.97], [47.25, -19.5], [47.15, -19.75], [47.25, -20.0], [47.03, -20.53], [46.68, -20.68], [46.53, -21.03], [46.18, -21.18], [46.03, -21.53], [45.5, -21.75], [45.25, -21.65], [45.0, -21.75], [44.47, -21.53], [44.25, -21.0], [44.35, -20.75], [44.25, -20.5], [44.35, -20.25], [44.25, -20.0], [44.35, -19.75], [44.25, -19.5], [44.35, -19.25], [44.32, -19.18], [43.97, -19.03], [43.75, -18.5], [43.85, -18.25], [43.75, -18.0], [43.85, -17.75]]]]}, "2021-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.85, -17.75], [43.75, -17.5], [43.97, -16.97], [44.32, -16.82], [44.47, -16.47], [45.0, -16.25], [45.53, -16.47], [45.75, -17.0], [45.65, -17.25], [45.68, -17.32], [46.03, -17.47], [46.25, -18.0], [46.15, -18.25], [46.25, -18.5], [46.15, -18.75], [46.18, -18.82], [46.25, -18.85], [46.5, -18.75], [47.03, -18.97], [47.25, -19.5], [47.15, -19.75], [47.25, -20.0], [47.03, -20.53], [46.68, -20.68], [46.53, -21.03], [46.18, -21.18], [46.03, -21.53], [45.5, -21.75], [45.25, -21.65], [45.0, -21.75], [44.47, -21.53], [44.25, -21.0], [44.35, -20.75], [44.25, -20.5], [44.35, -20.25], [44.25, -20.0], [44.35, -19.75], [44.25, -19.5], [44.35, -19.25], [44.32, -19.18], [43.97, -19.03], [43.75, -18.5], [43.85, -18.25], [43.75, -18.0], [43.85, -17.75]]]]}, "2021-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.85, -17.75], [43.75, -17.5], [43.97, -16.97], [44.32, -16.82], [44.47, -16.47], [45.0, -16.25], [45.53, -16.47], [45.75, -17.0], [45.65, -17.25], [45.68, -17.32], [46.03, -17.47], [46.25, -18.0], [46.15, -18.25], [46.25, -18.5], [46.15, -18.75], [46.18, -18.82], [46.25, -18.85], [46.5, -18.75], [47.03, -18.97], [47.25, -19.5], [47.15, -19.75], [47.25, -20.0], [47.03, -20.53], [46.68, -20.68], [46.53, -21.03], [46.18, -21.18], [46.03, -21.53], [45.5, -21.75], [45.25, -21.65], [45.0, -21.75], [44.47, -21.53], [44.25, -21.0], [44.35, -20.75], [44.25, -20.5], [44.35, -20.25], [44.25, -20.0], [44.35, -19.75], [44.25, -19.5], [44.35, -19.25], [44.32, -19.18], [43.97, -19.03], [43.75, -18.5], [43.85, -18.25], [43.75, -18.0], [43.85, -17.75]]]]}, "2021-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.47, -21.03], [44.25, -20.5], [44.47, -19.97], [45.0, -19.75], [45.25, -19.85], [45.32, -19.82], [45.47, -19.47], [46.0, -19.25], [46.53, -19.47], [46.75, -20.0], [46.65, -20.25], [46.75, -20.5], [46.53, -21.03], [46.0, -21.25], [45.75, -21.15], [45.5, -21.25], [45.25, -21.15], [45.0, -21.25], [44.47, -21.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.6030038923191796}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6276816237511273}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.768477279676347, 23.543874313608683, 24.103733685602947, 24.30517007303581]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.06372282137164, 20.556952165063592, 20.29944114743853, 22.5431595091099]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.678291572281014, -1.9192530612786824, -1.36417095249629, -1.1753250136361544]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.1962611406365795, -2.6030038923191796, -1.857166793505769, -1.281148560575616]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.024404958464234, -2.3241617520412587, -1.626790632386551, -1.3176862046418352]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.589986462223765, -3.181707882982537, -2.276245126145281, -1.3253904704120927]}}