{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:25.726199", "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": "2024-Dec-16_to_2024-Dec-21_16.5_11.5"}, "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": 2024120000418}, "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": "December 16 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 21 2024"}, "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": 106442.88740248358}, "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": ["Cameroon", "Chad"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 11.5}, "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": 16.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 17.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[14.75, 11.5], [14.97, 12.03], [15.5, 12.25], [15.75, 12.15], [15.82, 12.18], [15.97, 12.53], [16.5, 12.75], [16.75, 12.65], [17.0, 12.75], [17.53, 12.53], [17.68, 12.18], [18.03, 12.03], [18.25, 11.5], [18.15, 11.25], [18.25, 11.0], [18.15, 10.75], [18.25, 10.5], [18.03, 9.97], [17.68, 9.82], [17.53, 9.47], [17.18, 9.32], [17.15, 9.25], [17.25, 9.0], [17.15, 8.75], [17.25, 8.5], [17.03, 7.97], [16.5, 7.75], [16.25, 7.85], [16.0, 7.75], [15.47, 7.97], [15.32, 8.32], [15.25, 8.35], [15.0, 8.25], [14.75, 8.35], [14.5, 8.25], [13.97, 8.47], [13.75, 9.0], [13.85, 9.25], [13.75, 9.5], [13.97, 10.03], [14.32, 10.18], [14.35, 10.25], [14.25, 10.5], [14.47, 11.03], [14.82, 11.18], [14.85, 11.25], [14.75, 11.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.0, 10.75], [15.47, 10.97], [15.25, 11.5], [15.47, 12.03], [16.0, 12.25], [16.25, 12.15], [16.5, 12.25], [17.03, 12.03], [17.25, 11.5], [17.03, 10.97], [16.5, 10.75], [16.25, 10.85], [16.0, 10.75]]]]}, "2024-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, 10.0], [15.46, 10.5], [15.25, 11.0], [15.35, 11.25], [15.25, 11.5], [15.47, 12.03], [16.0, 12.25], [16.25, 12.15], [16.32, 12.18], [16.47, 12.53], [17.0, 12.75], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.75, 11.5], [17.65, 11.25], [17.75, 11.0], [17.65, 10.75], [17.75, 10.5], [17.53, 9.97], [17.18, 9.82], [17.15, 9.75], [17.25, 9.5], [17.03, 8.97], [16.5, 8.75], [16.25, 8.85], [16.0, 8.75], [15.47, 8.97], [15.25, 9.5], [15.35, 9.75], [15.25, 10.0]]]]}, "2024-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, 9.5], [13.97, 10.03], [14.32, 10.18], [14.35, 10.25], [14.25, 10.5], [14.47, 11.03], [14.82, 11.18], [14.85, 11.25], [14.75, 11.5], [14.97, 12.03], [15.5, 12.25], [15.75, 12.15], [15.82, 12.18], [15.97, 12.53], [16.5, 12.75], [16.75, 12.65], [17.0, 12.75], [17.53, 12.53], [17.68, 12.18], [18.03, 12.03], [18.25, 11.5], [18.15, 11.25], [18.25, 11.0], [18.15, 10.75], [18.25, 10.5], [18.03, 9.97], [17.68, 9.82], [17.53, 9.47], [17.18, 9.32], [17.15, 9.25], [17.25, 9.0], [17.15, 8.75], [17.25, 8.5], [17.03, 7.97], [16.5, 7.75], [16.25, 7.85], [16.0, 7.75], [15.47, 7.97], [15.32, 8.32], [15.25, 8.35], [15.0, 8.25], [14.75, 8.35], [14.5, 8.25], [13.97, 8.47], [13.75, 9.0], [13.85, 9.25], [13.75, 9.5]]]]}, "2024-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, 9.5], [13.97, 10.03], [14.32, 10.18], [14.35, 10.25], [14.25, 10.5], [14.47, 11.03], [14.82, 11.18], [14.85, 11.25], [14.75, 11.5], [14.97, 12.03], [15.5, 12.25], [15.75, 12.15], [15.82, 12.18], [15.97, 12.53], [16.5, 12.75], [16.75, 12.65], [17.0, 12.75], [17.53, 12.53], [17.68, 12.18], [18.03, 12.03], [18.25, 11.5], [18.15, 11.25], [18.25, 11.0], [18.15, 10.75], [18.25, 10.5], [18.03, 9.97], [17.68, 9.82], [17.53, 9.47], [17.18, 9.32], [17.15, 9.25], [17.25, 9.0], [17.15, 8.75], [17.25, 8.5], [17.03, 7.97], [16.5, 7.75], [16.25, 7.85], [16.0, 7.75], [15.47, 7.97], [15.32, 8.32], [15.25, 8.35], [15.0, 8.25], [14.75, 8.35], [14.5, 8.25], [13.97, 8.47], [13.75, 9.0], [13.85, 9.25], [13.75, 9.5]]]]}, "2024-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, 9.5], [13.97, 10.03], [14.32, 10.18], [14.35, 10.25], [14.25, 10.5], [14.47, 11.03], [14.82, 11.18], [14.85, 11.25], [14.75, 11.5], [14.97, 12.03], [15.5, 12.25], [15.75, 12.15], [15.82, 12.18], [15.97, 12.53], [16.5, 12.75], [16.75, 12.65], [17.0, 12.75], [17.53, 12.53], [17.68, 12.18], [18.03, 12.03], [18.25, 11.5], [18.15, 11.25], [18.25, 11.0], [18.15, 10.75], [18.25, 10.5], [18.03, 9.97], [17.68, 9.82], [17.53, 9.47], [17.18, 9.32], [17.15, 9.25], [17.25, 9.0], [17.15, 8.75], [17.25, 8.5], [17.03, 7.97], [16.5, 7.75], [16.25, 7.85], [16.0, 7.75], [15.47, 7.97], [15.32, 8.32], [15.25, 8.35], [15.0, 8.25], [14.75, 8.35], [14.5, 8.25], [13.97, 8.47], [13.75, 9.0], [13.85, 9.25], [13.75, 9.5]]]]}, "2024-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, 10.53], [14.82, 10.68], [14.85, 10.75], [14.75, 11.0], [14.97, 11.53], [15.32, 11.68], [15.47, 12.03], [16.0, 12.25], [16.25, 12.15], [16.5, 12.25], [16.75, 12.15], [17.0, 12.25], [17.53, 12.03], [17.75, 11.5], [17.65, 11.25], [17.75, 11.0], [17.65, 10.75], [17.75, 10.5], [17.53, 9.97], [17.18, 9.82], [17.03, 9.47], [16.68, 9.32], [16.65, 9.25], [16.75, 9.0], [16.53, 8.47], [16.0, 8.25], [15.75, 8.35], [15.5, 8.25], [14.97, 8.47], [14.82, 8.82], [14.75, 8.85], [14.5, 8.75], [13.97, 8.97], [13.75, 9.5], [13.97, 10.03], [14.32, 10.18], [14.47, 10.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.488831953707461}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.545841312326579}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.10507100423183, 22.84158027844552, 22.60375326247447, 22.4470620654879, 22.577297065371624, 22.835091194273957]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.94068298339846, 21.722070312500023, 21.443687693278036, 21.396548207600915, 21.53384933471682, 21.93232116699221]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.016859636810011, -2.6848978291404646, -2.611479093101504, -2.7000982558368993, -2.4721970255321026, -2.1711490894825665]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.075822873999641, -3.1764404565577706, -3.488831953707461, -3.445704979088589, -3.1029766855114644, -2.6902066149000916]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5537756692648532, -1.6229388987685645, -1.6779106454951307, -1.8041804195333022, -1.6906567817504923, -1.48770149077641]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5732644043830197, -1.7916660015496657, -2.0364170537115105, -2.2039513268906665, -2.041748252462613, -1.7522530193021377]}}