{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:55:45.471443", "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": "2014-Feb-27_to_2014-Mar-05_22.5_-24.5"}, "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": 2014020001137}, "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": "February 27 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 05 2014"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 257097.06422853656}, "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": ["Botswana", "Namibia", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "W.Southern-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": -24.5}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 27.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, -22.97], [18.82, -22.82], [18.97, -22.47], [19.5, -22.25], [19.75, -22.35], [20.0, -22.25], [20.25, -22.35], [20.5, -22.25], [20.8, -22.37], [20.85, -22.25], [20.75, -22.0], [20.97, -21.47], [21.5, -21.25], [21.75, -21.35], [22.0, -21.25], [22.53, -21.47], [22.68, -21.82], [23.03, -21.97], [23.25, -22.5], [23.15, -22.75], [23.25, -23.0], [23.15, -23.25], [23.25, -23.5], [23.03, -24.03], [22.5, -24.25], [22.25, -24.15], [22.18, -24.18], [22.03, -24.53], [21.68, -24.68], [21.53, -25.03], [21.0, -25.25], [20.75, -25.15], [20.5, -25.25], [20.25, -25.15], [20.0, -25.25], [19.47, -25.03], [19.32, -24.68], [19.25, -24.65], [19.0, -24.75], [18.47, -24.53], [18.25, -24.0], [18.35, -23.75], [18.25, -23.5], [18.47, -22.97]]]]}, "2014-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, -22.97], [18.82, -22.82], [18.97, -22.47], [19.5, -22.25], [19.75, -22.35], [20.0, -22.25], [20.25, -22.35], [20.5, -22.25], [20.8, -22.37], [20.85, -22.25], [20.75, -22.0], [20.97, -21.47], [21.5, -21.25], [21.75, -21.35], [22.0, -21.25], [22.53, -21.47], [22.68, -21.82], [22.75, -21.85], [23.0, -21.75], [23.53, -21.97], [23.68, -22.32], [24.03, -22.47], [24.25, -23.0], [24.15, -23.25], [24.25, -23.5], [24.03, -24.03], [23.68, -24.18], [23.53, -24.53], [23.18, -24.68], [23.15, -24.75], [23.25, -25.0], [23.15, -25.25], [23.18, -25.32], [23.53, -25.47], [23.75, -26.0], [23.53, -26.53], [23.0, -26.75], [22.75, -26.65], [22.5, -26.75], [21.97, -26.53], [21.75, -26.0], [21.85, -25.75], [21.75, -25.5], [21.85, -25.25], [21.82, -25.18], [21.5, -25.04], [21.0, -25.25], [20.75, -25.15], [20.5, -25.25], [20.25, -25.15], [20.0, -25.25], [19.47, -25.03], [19.32, -24.68], [19.25, -24.65], [19.0, -24.75], [18.47, -24.53], [18.25, -24.0], [18.35, -23.75], [18.25, -23.5], [18.47, -22.97]]]]}, "2014-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, -22.97], [18.82, -22.82], [18.97, -22.47], [19.5, -22.25], [19.75, -22.35], [20.0, -22.25], [20.25, -22.35], [20.5, -22.25], [20.8, -22.37], [20.85, -22.25], [20.75, -22.0], [20.97, -21.47], [21.5, -21.25], [21.75, -21.35], [22.0, -21.25], [22.53, -21.47], [22.68, -21.82], [22.75, -21.85], [23.0, -21.75], [23.25, -21.85], [23.5, -21.75], [23.75, -21.85], [23.82, -21.82], [23.97, -21.47], [24.5, -21.25], [24.75, -21.35], [25.0, -21.25], [25.53, -21.47], [25.68, -21.82], [25.75, -21.85], [26.0, -21.75], [26.53, -21.97], [26.68, -22.32], [27.03, -22.47], [27.25, -23.0], [27.15, -23.25], [27.25, -23.5], [27.15, -23.75], [27.18, -23.82], [27.53, -23.97], [27.75, -24.5], [27.65, -24.75], [27.75, -25.0], [27.53, -25.53], [27.0, -25.75], [26.75, -25.65], [26.5, -25.75], [26.25, -25.65], [26.0, -25.75], [25.47, -25.53], [25.3, -25.12], [25.18, -25.18], [25.15, -25.25], [25.25, -25.5], [25.15, -25.75], [25.25, -26.0], [25.03, -26.53], [24.68, -26.68], [24.53, -27.03], [24.0, -27.25], [23.75, -27.15], [23.5, -27.25], [22.97, -27.03], [22.82, -26.68], [22.75, -26.65], [22.5, -26.75], [21.97, -26.53], [21.75, -26.0], [21.85, -25.75], [21.75, -25.5], [21.85, -25.25], [21.82, -25.18], [21.5, -25.04], [21.0, -25.25], [20.75, -25.15], [20.5, -25.25], [20.25, -25.15], [20.0, -25.25], [19.47, -25.03], [19.32, -24.68], [19.25, -24.65], [19.0, -24.75], [18.47, -24.53], [18.25, -24.0], [18.35, -23.75], [18.25, -23.5], [18.47, -22.97]], [[25.85, -24.25], [25.82, -24.18], [25.75, -24.15], [25.68, -24.18], [25.65, -24.25], [25.7, -24.37], [25.82, -24.32], [25.85, -24.25]]]]}, "2014-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.35, -23.75], [21.25, -23.5], [21.47, -22.97], [22.0, -22.75], [22.25, -22.85], [22.32, -22.82], [22.35, -22.75], [22.25, -22.5], [22.47, -21.97], [23.0, -21.75], [23.25, -21.85], [23.5, -21.75], [23.75, -21.85], [23.82, -21.82], [23.97, -21.47], [24.5, -21.25], [24.75, -21.35], [25.0, -21.25], [25.53, -21.47], [25.68, -21.82], [25.75, -21.85], [26.0, -21.75], [26.53, -21.97], [26.68, -22.32], [27.03, -22.47], [27.25, -23.0], [27.15, -23.25], [27.25, -23.5], [27.15, -23.75], [27.18, -23.82], [27.53, -23.97], [27.75, -24.5], [27.65, -24.75], [27.75, -25.0], [27.53, -25.53], [27.0, -25.75], [26.75, -25.65], [26.5, -25.75], [26.25, -25.65], [26.0, -25.75], [25.47, -25.53], [25.3, -25.12], [25.18, -25.18], [25.15, -25.25], [25.25, -25.5], [25.15, -25.75], [25.25, -26.0], [25.03, -26.53], [24.68, -26.68], [24.53, -27.03], [24.0, -27.25], [23.75, -27.15], [23.5, -27.25], [22.97, -27.03], [22.82, -26.68], [22.75, -26.65], [22.5, -26.75], [21.97, -26.53], [21.75, -26.0], [21.85, -25.75], [21.75, -25.5], [21.85, -25.25], [21.82, -25.18], [21.47, -25.03], [21.25, -24.5], [21.35, -24.25], [21.25, -24.0], [21.35, -23.75]], [[25.85, -24.25], [25.82, -24.18], [25.75, -24.15], [25.68, -24.18], [25.65, -24.25], [25.7, -24.37], [25.82, -24.32], [25.85, -24.25]]]]}, "2014-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.0, -23.25], [22.25, -23.35], [22.5, -23.25], [22.8, -23.37], [22.85, -23.25], [22.75, -23.0], [22.85, -22.75], [22.75, -22.5], [22.97, -21.97], [23.5, -21.75], [23.75, -21.85], [23.82, -21.82], [23.97, -21.47], [24.5, -21.25], [24.75, -21.35], [25.0, -21.25], [25.53, -21.47], [25.68, -21.82], [25.75, -21.85], [26.0, -21.75], [26.53, -21.97], [26.68, -22.32], [27.03, -22.47], [27.25, -23.0], [27.15, -23.25], [27.25, -23.5], [27.15, -23.75], [27.18, -23.82], [27.53, -23.97], [27.75, -24.5], [27.65, -24.75], [27.75, -25.0], [27.53, -25.53], [27.0, -25.75], [26.75, -25.65], [26.5, -25.75], [26.25, -25.65], [26.0, -25.75], [25.47, -25.53], [25.3, -25.12], [25.18, -25.18], [25.15, -25.25], [25.25, -25.5], [25.15, -25.75], [25.25, -26.0], [25.03, -26.53], [24.68, -26.68], [24.53, -27.03], [24.0, -27.25], [23.75, -27.15], [23.5, -27.25], [22.97, -27.03], [22.82, -26.68], [22.75, -26.65], [22.5, -26.75], [21.97, -26.53], [21.75, -26.0], [21.85, -25.75], [21.75, -25.5], [21.85, -25.25], [21.8, -25.12], [21.5, -25.25], [20.97, -25.03], [20.75, -24.5], [20.97, -23.97], [21.32, -23.82], [21.47, -23.47], [22.0, -23.25]], [[25.85, -24.25], [25.82, -24.18], [25.75, -24.15], [25.68, -24.18], [25.65, -24.25], [25.7, -24.37], [25.82, -24.32], [25.85, -24.25]]]]}, "2014-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.0, -23.25], [22.25, -23.35], [22.5, -23.25], [23.03, -23.47], [23.18, -23.82], [23.25, -23.85], [23.5, -23.75], [23.75, -23.85], [24.0, -23.75], [24.53, -23.97], [24.75, -24.5], [24.65, -24.75], [24.75, -25.0], [24.65, -25.25], [24.75, -25.5], [24.53, -26.03], [24.18, -26.18], [24.03, -26.53], [23.5, -26.75], [23.25, -26.65], [23.0, -26.75], [22.75, -26.65], [22.5, -26.75], [21.97, -26.53], [21.75, -26.0], [21.85, -25.75], [21.75, -25.5], [21.85, -25.25], [21.8, -25.12], [21.5, -25.25], [20.97, -25.03], [20.75, -24.5], [20.97, -23.97], [21.32, -23.82], [21.47, -23.47], [22.0, -23.25]]]]}, "2014-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, -25.03], [20.75, -24.5], [20.97, -23.97], [21.5, -23.75], [22.0, -23.96], [22.5, -23.75], [23.03, -23.97], [23.2, -24.37], [23.5, -24.25], [24.03, -24.47], [24.25, -25.0], [24.03, -25.53], [23.5, -25.75], [22.97, -25.53], [22.8, -25.12], [22.5, -25.25], [22.0, -25.04], [21.5, -25.25], [20.97, -25.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.960394671447943}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.901174006345919}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.973858932194844, 21.194422987676035, 20.772514584910823, 21.319019882388375, 21.629383943405685, 22.393048963702483, 22.93651778289592]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.043399449898686, 19.70389985909617, 18.888481840292457, 19.195501072419574, 20.035432445180845, 21.92190089738773, 22.80190762335252]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.508673737508275, -4.399222390355607, -4.422262454962658, -3.7168445842282027, -3.3704799454474954, -3.272454158776652, -2.9239442821557304]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.942351796889966, -5.3525808370313825, -5.960394671447943, -4.47359745461489, -4.218045560085898, -3.946561898551181, -3.1881778725199865]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3876677202917125, -1.7175654280301287, -1.8215225210293466, -1.5271124380294692, -1.3930975494534623, -1.4039404536038123, -1.2681796754022026]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5123171827666075, -2.2434369600182826, -2.750105764799006, -1.873387247297792, -1.6090704975358006, -1.5568665038837102, -1.3085924228526356]}}