{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:21:02.392496", "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-Jun-22_to_2022-Jun-30_34.5_-11.0"}, "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": 2022060000967}, "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": "June 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 30 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 51417.381718447316}, "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": ["Malawi", "Mozambique", "Tanzania, United Republic of", "Zambia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": -11.0}, "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": 34.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 33.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 36.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -13.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[36.65, -12.75], [36.75, -13.0], [36.53, -13.53], [36.0, -13.75], [35.75, -13.65], [35.5, -13.75], [35.0, -13.54], [34.5, -13.75], [33.97, -13.53], [33.75, -13.0], [33.85, -12.75], [33.82, -12.68], [33.75, -12.65], [33.5, -12.75], [32.97, -12.53], [32.75, -12.0], [32.85, -11.75], [32.75, -11.5], [32.85, -11.25], [32.75, -11.0], [32.85, -10.75], [32.75, -10.5], [32.97, -9.97], [33.5, -9.75], [34.0, -9.96], [34.5, -9.75], [35.03, -9.97], [35.25, -10.5], [35.15, -10.75], [35.18, -10.82], [35.53, -10.97], [35.75, -11.5], [35.65, -11.75], [35.68, -11.82], [35.75, -11.85], [36.0, -11.75], [36.53, -11.97], [36.75, -12.5], [36.65, -12.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Eastern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, -11.97], [36.0, -11.75], [36.53, -11.97], [36.75, -12.5], [36.65, -12.75], [36.75, -13.0], [36.53, -13.53], [36.0, -13.75], [35.75, -13.65], [35.5, -13.75], [34.97, -13.53], [34.75, -13.0], [34.97, -12.47], [35.32, -12.32], [35.47, -11.97]]]]}, "2022-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, -12.5], [34.97, -11.97], [35.5, -11.75], [35.75, -11.85], [36.0, -11.75], [36.53, -11.97], [36.75, -12.5], [36.65, -12.75], [36.75, -13.0], [36.53, -13.53], [36.0, -13.75], [35.75, -13.65], [35.5, -13.75], [34.97, -13.53], [34.75, -13.0], [34.85, -12.75], [34.75, -12.5]]]]}, "2022-06-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, -12.5], [34.97, -11.97], [35.5, -11.75], [35.75, -11.85], [36.0, -11.75], [36.53, -11.97], [36.75, -12.5], [36.65, -12.75], [36.75, -13.0], [36.53, -13.53], [36.0, -13.75], [35.75, -13.65], [35.5, -13.75], [34.97, -13.53], [34.75, -13.0], [34.85, -12.75], [34.75, -12.5]]]]}, "2022-06-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.97, -11.97], [35.5, -11.75], [36.03, -11.97], [36.25, -12.5], [36.03, -13.03], [35.5, -13.25], [34.97, -13.03], [34.75, -12.5], [34.97, -11.97]]]]}, "2022-06-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.75, -11.5], [32.85, -11.25], [32.75, -11.0], [32.85, -10.75], [32.75, -10.5], [32.97, -9.97], [33.5, -9.75], [34.0, -9.96], [34.5, -9.75], [35.03, -9.97], [35.25, -10.5], [35.15, -10.75], [35.18, -10.82], [35.53, -10.97], [35.75, -11.5], [35.65, -11.75], [35.75, -12.0], [35.53, -12.53], [35.0, -12.75], [34.5, -12.54], [34.0, -12.75], [33.75, -12.65], [33.5, -12.75], [32.97, -12.53], [32.75, -12.0], [32.85, -11.75], [32.75, -11.5]]]]}, "2022-06-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.75, -11.5], [32.85, -11.25], [32.75, -11.0], [32.85, -10.75], [32.75, -10.5], [32.97, -9.97], [33.5, -9.75], [34.0, -9.96], [34.5, -9.75], [35.03, -9.97], [35.25, -10.5], [35.15, -10.75], [35.18, -10.82], [35.53, -10.97], [35.75, -11.5], [35.65, -11.75], [35.75, -12.0], [35.53, -12.53], [35.18, -12.68], [35.15, -12.75], 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mean t2m.", "value": [15.912316867191805, 16.282072627241178, 16.264694308063213, 16.785848840540098, 17.806523751024372, 18.365552006889175, 18.019822026909196, 20.235324920945743, 20.150806346567038]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.718706551242576, 14.973354514416883, 15.039747105305878, 16.785848840540098, 14.631015279610324, 14.605815741587776, 14.238667054486598, 19.56872042339188, 20.150806346567038]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7798662440110888, -1.5779727333011806, -1.5834105387546487, -1.5349649106231027, -1.5932872874684676, -1.6410752122465975, -1.913103423277317, -1.5037155530168131, -1.1603357121045974]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.022655677829846, 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