{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:45.284482", "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-12_to_2021-Mar-15_29.0_-30.5"}, "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": 2021030001922}, "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 12 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 15 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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 61047.63384978053}, "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": ["Lesotho", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.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": ["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": -30.5}, "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": 29.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "29.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 26.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-03-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.97, -32.03], [25.75, -31.5], [25.97, -30.97], [26.5, -30.75], [26.75, -30.85], [26.82, -30.82], [26.97, -30.47], [27.5, -30.25], [27.75, -30.35], [27.82, -30.32], [27.85, -30.25], [27.75, -30.0], [27.97, -29.47], [28.32, -29.32], [28.47, -28.97], [29.0, -28.75], [29.53, -28.97], [29.75, -29.5], [29.65, -29.75], [29.75, -30.0], [29.65, -30.25], [29.75, -30.5], [29.53, -31.03], [29.0, -31.25], [28.75, -31.15], [28.68, -31.18], [28.53, -31.53], [28.18, -31.68], [28.03, -32.03], [27.5, -32.25], [27.25, -32.15], [27.0, -32.25], [26.75, -32.15], [26.5, -32.25], [25.97, -32.03]]]]}, "2021-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.97, -32.03], [25.75, -31.5], [25.97, -30.97], [26.5, -30.75], [26.75, -30.85], [26.82, -30.82], [26.97, -30.47], [27.5, -30.25], [27.75, -30.35], [27.82, -30.32], [27.85, -30.25], [27.75, -30.0], [27.97, -29.47], [28.32, -29.32], [28.47, -28.97], [29.0, -28.75], [29.53, -28.97], [29.7, -29.37], [30.0, -29.25], [30.53, -29.47], [30.68, -29.82], [30.75, -29.85], [31.0, -29.75], [31.53, -29.97], [31.75, -30.5], [31.65, -30.75], [31.75, -31.0], [31.53, -31.53], [31.18, -31.68], [31.03, -32.03], [30.5, -32.25], [30.25, -32.15], [30.18, -32.18], [30.03, -32.53], [29.5, -32.75], [28.97, -32.53], [28.75, -32.0], [28.88, -31.7], [28.75, -31.65], [28.5, -31.75], [28.25, -31.65], [28.18, -31.68], [28.03, -32.03], [27.5, -32.25], [27.25, -32.15], [27.0, -32.25], [26.75, -32.15], [26.5, -32.25], [25.97, -32.03]]]]}, "2021-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.97, -32.03], [25.75, -31.5], [25.97, -30.97], [26.5, -30.75], [26.75, -30.85], [26.82, -30.82], [26.97, -30.47], [27.5, -30.25], [27.75, -30.35], [27.82, -30.32], [27.85, -30.25], [27.75, -30.0], [27.97, -29.47], [28.32, -29.32], [28.47, -28.97], [29.0, -28.75], [29.53, -28.97], [29.7, -29.37], [30.0, -29.25], [30.53, -29.47], [30.68, -29.82], [30.75, -29.85], [31.0, -29.75], [31.53, -29.97], [31.75, -30.5], [31.65, -30.75], [31.75, -31.0], [31.53, -31.53], [31.18, -31.68], [31.03, -32.03], [30.5, -32.25], [30.25, -32.15], [30.18, -32.18], [30.03, -32.53], [29.5, -32.75], [28.97, -32.53], [28.75, -32.0], [28.88, -31.7], [28.75, -31.65], [28.5, -31.75], [28.25, -31.65], [28.18, -31.68], [28.03, -32.03], [27.5, -32.25], [27.25, -32.15], [27.0, -32.25], [26.75, -32.15], [26.5, -32.25], [25.97, -32.03]]]]}, "2021-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.25, -30.0], [28.47, -29.47], [29.0, -29.25], [29.5, -29.46], [30.0, -29.25], [30.53, -29.47], [30.68, -29.82], [30.75, -29.85], [31.0, -29.75], [31.53, -29.97], [31.75, -30.5], [31.65, -30.75], [31.75, -31.0], [31.53, -31.53], [31.18, -31.68], [31.03, -32.03], [30.5, -32.25], [30.25, -32.15], [30.18, -32.18], [30.03, -32.53], [29.5, -32.75], [28.97, -32.53], [28.75, -32.0], [28.88, -31.7], [28.75, -31.65], [28.5, -31.75], [27.97, -31.53], [27.75, -31.0], [27.97, -30.47], [28.32, -30.32], [28.35, -30.25], [28.25, -30.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 6.112399367954424}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 3.3155490810565413}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.332510140719478, 23.057640998625004, 22.130679621108698, 23.415572159054364]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.6644496049052, 26.29185971435419, 26.196186225841416, 25.945677450094138]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.42982125054242, 3.9346739169675895, 3.0848644134398455, 2.6437593766812824]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.122858318440194, 6.112399367954424, 4.564064527431526, 4.183722262683034]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4124738766519231, 1.8167017892662813, 1.4975033897285175, 1.332208503027157]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.7209511689320403, 2.3113498280345204, 1.9551352172096048, 1.5651477227523565]}}