{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:45.259275", "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-Mar-26_to_2022-Mar-30_46.5_5.0"}, "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": 2022030000907}, "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 26 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 30 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 61514.171485051476}, "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": ["Somalia"]}, "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": 5.0}, "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": 46.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 46.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 48.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 4.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 7.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[46.5, 3.75], [46.25, 3.85], [46.0, 3.75], [45.47, 3.97], [45.25, 4.5], [45.35, 4.75], [45.25, 5.0], [45.47, 5.53], [45.82, 5.68], [45.85, 5.75], [45.75, 6.0], [45.85, 6.25], [45.75, 6.5], [45.97, 7.03], [46.5, 7.25], [46.75, 7.15], [46.82, 7.18], [46.85, 7.25], [46.75, 7.5], [46.97, 8.03], [47.5, 8.25], [48.03, 8.03], [48.18, 7.68], [48.53, 7.53], [48.75, 7.0], [48.53, 6.47], [48.13, 6.3], [48.18, 6.18], [48.53, 6.03], [48.75, 5.5], [48.65, 5.25], [48.75, 5.0], [48.53, 4.47], [48.18, 4.32], [48.03, 3.97], [47.5, 3.75], [47.0, 3.96], [46.5, 3.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, 5.0], [45.47, 5.53], [45.82, 5.68], [45.85, 5.75], [45.75, 6.0], [45.85, 6.25], [45.75, 6.5], [45.97, 7.03], [46.5, 7.25], [46.75, 7.15], [46.82, 7.18], [46.85, 7.25], [46.75, 7.5], [46.97, 8.03], [47.5, 8.25], [48.03, 8.03], [48.18, 7.68], [48.53, 7.53], [48.75, 7.0], [48.53, 6.47], [48.13, 6.3], [48.18, 6.18], [48.53, 6.03], [48.75, 5.5], [48.65, 5.25], [48.75, 5.0], [48.53, 4.47], [48.18, 4.32], [48.03, 3.97], [47.5, 3.75], [47.0, 3.96], [46.5, 3.75], [46.25, 3.85], [46.0, 3.75], [45.47, 3.97], [45.25, 4.5], [45.35, 4.75], [45.25, 5.0]]]]}, "2022-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, 5.0], [45.47, 5.53], [45.82, 5.68], [45.85, 5.75], [45.75, 6.0], [45.85, 6.25], [45.75, 6.5], [45.97, 7.03], [46.5, 7.25], [46.75, 7.15], [46.82, 7.18], [46.85, 7.25], [46.75, 7.5], [46.97, 8.03], [47.5, 8.25], [48.03, 8.03], [48.18, 7.68], [48.53, 7.53], [48.75, 7.0], [48.53, 6.47], [48.13, 6.3], [48.18, 6.18], [48.53, 6.03], [48.75, 5.5], [48.65, 5.25], [48.75, 5.0], [48.53, 4.47], [48.18, 4.32], [48.03, 3.97], [47.5, 3.75], [47.0, 3.96], [46.5, 3.75], [46.25, 3.85], [46.0, 3.75], [45.47, 3.97], [45.25, 4.5], [45.35, 4.75], [45.25, 5.0]]]]}, "2022-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, 5.0], [45.47, 5.53], [45.82, 5.68], [45.85, 5.75], [45.75, 6.0], [45.85, 6.25], [45.75, 6.5], [45.97, 7.03], [46.5, 7.25], [46.75, 7.15], [46.82, 7.18], [46.85, 7.25], [46.75, 7.5], [46.97, 8.03], [47.5, 8.25], [48.03, 8.03], [48.18, 7.68], [48.53, 7.53], [48.75, 7.0], [48.53, 6.47], [48.13, 6.3], [48.18, 6.18], [48.53, 6.03], [48.75, 5.5], [48.65, 5.25], [48.75, 5.0], [48.53, 4.47], [48.18, 4.32], [48.03, 3.97], [47.5, 3.75], [47.0, 3.96], [46.5, 3.75], [46.25, 3.85], [46.0, 3.75], [45.47, 3.97], [45.25, 4.5], [45.35, 4.75], [45.25, 5.0]]]]}, "2022-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.75, 5.0], [45.97, 5.53], [46.32, 5.68], [46.35, 5.75], [46.25, 6.0], [46.47, 6.53], [47.0, 6.75], [47.53, 6.53], [47.68, 6.18], [48.03, 6.03], [48.25, 5.5], [48.03, 4.97], [47.68, 4.82], [47.53, 4.47], [47.18, 4.32], [47.03, 3.97], [46.5, 3.75], [45.97, 3.97], [45.75, 4.5], [45.85, 4.75], [45.75, 5.0]]]]}, "2022-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.47, 6.03], [47.0, 6.25], [47.53, 6.03], [47.75, 5.5], [47.65, 5.25], [47.75, 5.0], [47.53, 4.47], [47.0, 4.25], [46.75, 4.35], [46.5, 4.25], [45.97, 4.47], [45.75, 5.0], [45.97, 5.53], [46.32, 5.68], [46.47, 6.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.4939025253955833}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9366752254846873}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.10847007303596, 26.244878055304014, 26.721831607369893, 27.616137740494707, 27.960670032704627]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.623446670590567, 25.150753773794975, 25.67776297122208, 27.270641392732443, 27.67215877350543]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2621636551939104, -2.1393576099759004, -1.6901847735327267, -1.362358732780109, -1.2074391292373434]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.4939025253955833, -3.4085891363735072, -2.6169182153053043, -1.5361818849214046, -1.2900696944963101]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.8532262055574162, -2.733228583178522, -2.23003363109905, -1.8461848988657517, -1.6837729784344628]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-4.303797459111848, -4.347737892061729, -3.457626711836828, -2.0402340654415023, -1.7940903845035832]}}