{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:50.766936", "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-Jan-19_to_2022-Jan-24_34.0_-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": 2022010000776}, "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": "January 19 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 24 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 87961.51450675669}, "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", "Tanzania, United Republic of", "Zambia"]}, "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": -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": 34.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 31.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 35.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -12.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[35.65, -11.25], [35.75, -11.5], [35.53, -12.03], [35.0, -12.25], [34.5, -12.04], [34.18, -12.18], [34.03, -12.53], [33.5, -12.75], [33.25, -12.65], [33.18, -12.68], [33.03, -13.03], [32.5, -13.25], [31.97, -13.03], [31.82, -12.68], [31.75, -12.65], [31.5, -12.75], [30.97, -12.53], [30.75, -12.0], [30.85, -11.75], [30.75, -11.5], [30.97, -10.97], [31.32, -10.82], [31.47, -10.47], [31.88, -10.3], [31.75, -10.0], [31.97, -9.47], [32.5, -9.25], [32.75, -9.35], [33.0, -9.25], [33.5, -9.46], [34.0, -9.25], [34.25, -9.35], [34.5, -9.25], [34.75, -9.35], [35.0, -9.25], [35.53, -9.47], [35.75, -10.0], [35.65, -10.25], [35.75, -10.5], [35.65, -10.75], [35.75, -11.0], [35.65, -11.25]]]]}}, "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": {"2022-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.25, -11.5], [31.47, -10.97], [32.0, -10.75], [32.25, -10.85], [32.32, 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-2.88951640259495}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.8214583744054569}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.621293865668065, 21.002006189793974, 20.480236881229303, 20.45895240114919, 20.327459563537843, 23.2268947589327]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.003572670987126, 17.923343657993257, 17.771965604759885, 17.5747133608196, 18.12825289388303, 22.38838637946236]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8460621531595927, -1.613336779869891, -1.944912718992796, -1.9852729606909045, -1.6522578725610146, -1.4634193259390713]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4058420863428864, -2.0347135995133954, -2.750378311192378, -2.88951640259495, -2.1540449756123508, -1.530088128797729]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.846155335000158, -1.6345759511312121, -2.0450796354466987, -2.1274088020276958, -1.768997926662001, -1.4644710841425885]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.391582700701991, -2.0417676855521347, -2.668491674173669, -3.3614948314189808, -2.075102129950652, -1.4818651348557685]}}