{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:41.998862", "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": "2026-Mar-04_to_2026-Mar-06_26.0_-6.5"}, "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": 2026030000178}, "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 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 06 2026"}, "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": 67544.40927303373}, "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"]}, "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": -6.5}, "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": 26.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 27.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -4.75}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[22.5, -5.25], [22.75, -5.35], [23.0, -5.25], [23.53, -5.47], [23.68, -5.82], [24.03, -5.97], [24.18, -6.32], [24.53, -6.47], [24.68, -6.82], [24.75, -6.85], [24.82, -6.82], [24.85, -6.75], [24.75, -6.5], [24.97, -5.97], [25.32, -5.82], [25.47, -5.47], [25.82, -5.32], [25.97, -4.97], [26.32, -4.82], [26.47, -4.47], [27.0, -4.25], [27.25, -4.35], [27.5, -4.25], [28.03, -4.47], [28.25, -5.0], [28.03, -5.53], [27.5, -5.75], [27.25, -5.65], [27.18, -5.68], [27.15, -5.75], [27.25, -6.0], [27.03, -6.53], [26.68, -6.68], [26.63, -6.8], [27.03, -6.97], [27.25, -7.5], [27.03, -8.03], [26.5, -8.25], [26.25, -8.15], [26.0, -8.25], [25.7, -8.12], [25.53, -8.53], [25.0, -8.75], [24.47, -8.53], [24.32, -8.18], [24.25, -8.15], [24.0, -8.25], [23.47, -8.03], [23.32, -7.68], [23.25, -7.65], [23.0, -7.75], [22.47, -7.53], [22.32, -7.18], [21.97, -7.03], [21.75, -6.5], [21.85, -6.25], [21.75, -6.0], [21.97, -5.47], [22.5, -5.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.75, -6.0], [21.97, -5.47], [22.5, -5.25], [22.75, -5.35], [23.0, -5.25], [23.53, -5.47], [23.68, -5.82], [24.03, -5.97], [24.18, -6.32], [24.53, -6.47], [24.68, -6.82], [24.75, -6.85], [24.82, -6.82], [24.85, -6.75], [24.75, -6.5], [24.97, -5.97], [25.32, -5.82], [25.47, -5.47], [25.82, -5.32], [25.97, -4.97], [26.32, -4.82], [26.47, -4.47], [27.0, -4.25], [27.25, -4.35], [27.5, -4.25], [28.03, -4.47], [28.25, -5.0], [28.03, -5.53], [27.5, -5.75], [27.25, -5.65], [27.18, -5.68], [27.15, -5.75], [27.25, -6.0], [27.03, -6.53], [26.68, -6.68], [26.63, -6.8], [27.03, -6.97], [27.25, -7.5], [27.03, -8.03], [26.5, -8.25], [26.25, -8.15], [26.0, -8.25], [25.7, -8.12], [25.53, -8.53], [25.0, -8.75], [24.47, -8.53], [24.32, -8.18], [24.25, -8.15], [24.0, -8.25], [23.47, -8.03], [23.32, -7.68], [23.25, -7.65], [23.0, -7.75], [22.47, -7.53], [22.32, -7.18], [21.97, -7.03], [21.75, -6.5], [21.85, -6.25], [21.75, -6.0]]]]}, "2026-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.75, -6.0], [21.97, -5.47], [22.5, -5.25], [22.75, -5.35], [23.0, -5.25], [23.53, -5.47], [23.68, -5.82], [24.03, -5.97], [24.18, -6.32], [24.53, -6.47], [24.68, -6.82], [24.75, -6.85], [24.82, -6.82], [24.85, -6.75], [24.75, -6.5], [24.97, -5.97], [25.32, -5.82], [25.47, -5.47], [25.82, -5.32], [25.97, -4.97], [26.32, -4.82], [26.47, -4.47], [27.0, -4.25], [27.25, -4.35], [27.5, -4.25], [28.03, -4.47], [28.25, -5.0], [28.03, -5.53], [27.5, -5.75], [27.25, -5.65], [27.18, -5.68], [27.15, -5.75], [27.25, -6.0], [27.03, -6.53], [26.68, -6.68], [26.63, -6.8], [27.03, -6.97], [27.25, -7.5], [27.03, -8.03], [26.5, -8.25], [26.25, -8.15], [26.0, -8.25], [25.7, -8.12], [25.53, -8.53], [25.0, -8.75], [24.47, -8.53], [24.32, -8.18], [24.25, -8.15], [24.0, -8.25], [23.47, -8.03], [23.32, -7.68], [23.25, -7.65], [23.0, -7.75], [22.47, -7.53], [22.32, -7.18], [21.97, -7.03], [21.75, -6.5], [21.85, -6.25], [21.75, -6.0]]]]}, "2026-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.75, -6.0], [21.97, -5.47], [22.5, -5.25], [22.75, -5.35], [23.0, -5.25], [23.53, -5.47], [23.68, -5.82], [24.03, -5.97], [24.18, -6.32], [24.53, -6.47], [24.68, -6.82], [24.75, -6.85], [24.82, -6.82], [24.85, -6.75], [24.75, -6.5], [24.97, -5.97], [25.32, -5.82], [25.47, -5.47], [25.82, -5.32], [25.97, -4.97], [26.32, -4.82], [26.47, -4.47], [27.0, -4.25], [27.25, -4.35], [27.5, -4.25], [28.03, -4.47], [28.25, -5.0], [28.03, -5.53], [27.5, -5.75], [27.25, -5.65], [27.18, -5.68], [27.15, -5.75], [27.25, -6.0], [27.03, -6.53], [26.68, -6.68], [26.63, -6.8], [27.03, -6.97], [27.25, -7.5], [27.03, -8.03], [26.5, -8.25], [26.25, -8.15], [26.0, -8.25], [25.7, -8.12], [25.53, -8.53], [25.0, -8.75], [24.47, -8.53], [24.32, -8.18], [24.25, -8.15], [24.0, -8.25], [23.47, -8.03], [23.32, -7.68], [23.25, -7.65], [23.0, -7.75], [22.47, -7.53], [22.32, -7.18], [21.97, -7.03], [21.75, -6.5], [21.85, -6.25], [21.75, -6.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.039195732080998}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9141191937232271}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.481162238843524, 21.910337066650413, 22.249866277521335]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.28553161621096, 20.954526519775413, 21.310683186848962]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.308781759938124, -1.8841586780180328, -1.549417143213524]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.039195732080998, -2.269843950825532, -2.04581097546361]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.209910240982639, -1.817716026938023, -1.4972534070041583]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.84783781666439, -2.1935061113410317, -1.9779248157578184]}}