{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:21.098020", "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": "2022-Aug-26_to_2022-Aug-28_28.5_4.0"}, "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": 2022080001103}, "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": "August 26 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 28 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 157047.17981632534}, "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": ["Congo, The Democratic Republic of the", "South Sudan", "Uganda"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": 4.0}, "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": 28.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 27.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 3.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 7.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[27.35, 4.25], [27.25, 4.5], [27.47, 5.03], [27.82, 5.18], [27.85, 5.25], [27.75, 5.5], [27.85, 5.75], [27.75, 6.0], [27.85, 6.25], [27.82, 6.32], [27.47, 6.47], [27.25, 7.0], [27.47, 7.53], [28.0, 7.75], [28.25, 7.65], [28.5, 7.75], [28.75, 7.65], [29.0, 7.75], [29.25, 7.65], [29.5, 7.75], [29.75, 7.65], [30.0, 7.75], [30.53, 7.53], [30.75, 7.0], [30.65, 6.75], [30.68, 6.68], [31.03, 6.53], [31.25, 6.0], [31.15, 5.75], [31.25, 5.5], [31.15, 5.25], [31.18, 5.18], [31.53, 5.03], [31.68, 4.68], [32.03, 4.53], [32.25, 4.0], [32.03, 3.47], [31.68, 3.32], [31.53, 2.97], [31.18, 2.82], [31.03, 2.47], [30.5, 2.25], [30.25, 2.35], [30.0, 2.25], [29.47, 2.47], [29.32, 2.82], [29.25, 2.85], [29.18, 2.82], [29.03, 2.47], [28.5, 2.25], [28.25, 2.35], [28.0, 2.25], [27.75, 2.35], [27.5, 2.25], [26.97, 2.47], [26.75, 3.0], [26.97, 3.53], [27.32, 3.68], [27.35, 3.75], [27.25, 4.0], [27.35, 4.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "N.Eastern-Africa", "S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.35, 3.75], [27.25, 4.0], [27.35, 4.25], [27.25, 4.5], [27.47, 5.03], [27.82, 5.18], [27.85, 5.25], [27.75, 5.5], [27.85, 5.75], [27.75, 6.0], [27.85, 6.25], [27.82, 6.32], [27.47, 6.47], [27.25, 7.0], [27.47, 7.53], [28.0, 7.75], [28.25, 7.65], [28.5, 7.75], [28.75, 7.65], [29.0, 7.75], [29.25, 7.65], [29.5, 7.75], [29.75, 7.65], [30.0, 7.75], [30.53, 7.53], [30.75, 7.0], [30.65, 6.75], [30.68, 6.68], [31.03, 6.53], [31.25, 6.0], [31.15, 5.75], [31.25, 5.5], [31.15, 5.25], [31.18, 5.18], [31.53, 5.03], [31.68, 4.68], [32.03, 4.53], [32.25, 4.0], [32.03, 3.47], [31.68, 3.32], [31.53, 2.97], [31.18, 2.82], [31.03, 2.47], [30.5, 2.25], [30.25, 2.35], [30.0, 2.25], [29.47, 2.47], [29.32, 2.82], [29.25, 2.85], [29.18, 2.82], [29.03, 2.47], [28.5, 2.25], [28.25, 2.35], [28.0, 2.25], [27.75, 2.35], [27.5, 2.25], [26.97, 2.47], [26.75, 3.0], [26.97, 3.53], [27.32, 3.68], [27.35, 3.75]]]]}, "2022-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.35, 3.75], [27.25, 4.0], [27.35, 4.25], [27.25, 4.5], [27.47, 5.03], [27.82, 5.18], [27.85, 5.25], [27.75, 5.5], [27.85, 5.75], [27.75, 6.0], [27.85, 6.25], [27.82, 6.32], [27.47, 6.47], [27.25, 7.0], [27.47, 7.53], [28.0, 7.75], [28.25, 7.65], [28.5, 7.75], [28.75, 7.65], [29.0, 7.75], [29.25, 7.65], [29.5, 7.75], [29.75, 7.65], [30.0, 7.75], [30.53, 7.53], [30.75, 7.0], [30.65, 6.75], [30.68, 6.68], [31.03, 6.53], [31.25, 6.0], [31.15, 5.75], [31.25, 5.5], [31.15, 5.25], [31.18, 5.18], [31.53, 5.03], [31.68, 4.68], [32.03, 4.53], [32.25, 4.0], [32.03, 3.47], [31.68, 3.32], [31.53, 2.97], [31.18, 2.82], [31.03, 2.47], [30.5, 2.25], [30.25, 2.35], [30.0, 2.25], [29.47, 2.47], [29.32, 2.82], [29.25, 2.85], [29.18, 2.82], [29.03, 2.47], [28.5, 2.25], [28.25, 2.35], [28.0, 2.25], [27.75, 2.35], [27.5, 2.25], [26.97, 2.47], [26.75, 3.0], [26.97, 3.53], [27.32, 3.68], [27.35, 3.75]]]]}, "2022-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.35, 3.75], [27.25, 4.0], [27.35, 4.25], [27.25, 4.5], [27.47, 5.03], [27.82, 5.18], [27.85, 5.25], [27.75, 5.5], [27.85, 5.75], [27.75, 6.0], [27.85, 6.25], [27.82, 6.32], [27.47, 6.47], [27.25, 7.0], [27.47, 7.53], [28.0, 7.75], [28.25, 7.65], [28.5, 7.75], [28.75, 7.65], [29.0, 7.75], [29.25, 7.65], [29.5, 7.75], [29.75, 7.65], [30.0, 7.75], [30.53, 7.53], [30.75, 7.0], [30.65, 6.75], [30.68, 6.68], [31.03, 6.53], [31.25, 6.0], [31.15, 5.75], [31.25, 5.5], [31.15, 5.25], [31.18, 5.18], [31.53, 5.03], [31.68, 4.68], [32.03, 4.53], [32.25, 4.0], [32.03, 3.47], [31.68, 3.32], [31.53, 2.97], [31.18, 2.82], [31.03, 2.47], [30.5, 2.25], [30.25, 2.35], [30.0, 2.25], [29.47, 2.47], [29.32, 2.82], [29.25, 2.85], [29.18, 2.82], [29.03, 2.47], [28.5, 2.25], [28.25, 2.35], [28.0, 2.25], [27.75, 2.35], [27.5, 2.25], [26.97, 2.47], [26.75, 3.0], [26.97, 3.53], [27.32, 3.68], [27.35, 3.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.4064496423654873}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7024012749880542}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.982468951768453, 22.333892246625112, 21.850791817974027]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.860329987814964, 19.862333528312263, 19.527408341847888]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7399872176354254, -1.434904652005494, -1.9323119553232428]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.705689341982577, -2.1864296960549154, -3.4064496423654873]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.3031737337941562, -1.941726626089488, -2.539336536421018]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.7054288460883997, -3.1305515132662, -4.325254931642605]}}