{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:45.518116", "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": "2025-Mar-07_to_2025-Mar-12_30.0_7.5"}, "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": 2025030000205}, "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 07 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 12 2025"}, "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": 241498.5968165387}, "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": ["South Sudan", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "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": 7.5}, "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": 30.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "30.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 26.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 10.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.5, 10.75], [30.03, 10.53], [30.25, 10.0], [30.03, 9.47], [29.5, 9.25], [28.97, 9.47], [28.75, 10.0], [28.97, 10.53], [29.5, 10.75]]]]}, "2025-03-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.25, 8.0], [26.47, 8.53], [26.88, 8.7], [26.75, 9.0], [26.85, 9.25], [26.75, 9.5], [26.85, 9.75], [26.75, 10.0], [26.97, 10.53], [27.32, 10.68], [27.47, 11.03], [28.0, 11.25], [28.25, 11.15], [28.5, 11.25], [28.75, 11.15], [29.0, 11.25], [29.25, 11.15], [29.5, 11.25], [29.75, 11.15], [30.0, 11.25], [30.25, 11.15], [30.5, 11.25], [31.03, 11.03], [31.18, 10.68], [31.53, 10.53], [31.75, 10.0], [31.65, 9.75], [31.68, 9.68], [31.75, 9.65], [32.0, 9.75], [32.53, 9.53], [32.75, 9.0], [32.65, 8.75], [32.68, 8.68], [33.03, 8.53], [33.18, 8.18], [33.25, 8.15], [33.5, 8.25], [34.03, 8.03], [34.25, 7.5], [34.03, 6.97], [33.68, 6.82], [33.53, 6.47], [33.0, 6.25], [32.75, 6.35], [32.68, 6.32], [32.53, 5.97], [32.0, 5.75], [31.47, 5.97], [31.32, 6.32], [31.25, 6.35], [31.0, 6.25], [30.75, 6.35], [30.5, 6.25], [30.25, 6.35], [30.0, 6.25], [29.75, 6.35], [29.5, 6.25], [29.25, 6.35], [29.0, 6.25], [28.75, 6.35], [28.68, 6.32], [28.53, 5.97], [28.0, 5.75], [27.47, 5.97], [27.32, 6.32], [26.97, 6.47], [26.75, 7.0], [26.85, 7.25], [26.82, 7.32], [26.47, 7.47], [26.25, 8.0]]]]}, "2025-03-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.25, 8.0], [26.47, 8.53], [26.88, 8.7], [26.75, 9.0], [26.85, 9.25], [26.75, 9.5], [26.85, 9.75], [26.75, 10.0], [26.97, 10.53], [27.32, 10.68], [27.47, 11.03], [28.0, 11.25], [28.25, 11.15], [28.5, 11.25], [28.75, 11.15], [29.0, 11.25], [29.25, 11.15], [29.5, 11.25], [29.75, 11.15], [30.0, 11.25], [30.25, 11.15], [30.5, 11.25], [31.03, 11.03], [31.18, 10.68], [31.53, 10.53], [31.75, 10.0], [31.65, 9.75], [31.68, 9.68], [31.75, 9.65], [32.0, 9.75], [32.53, 9.53], [32.75, 9.0], [32.65, 8.75], [32.68, 8.68], [33.03, 8.53], [33.18, 8.18], [33.25, 8.15], [33.5, 8.25], [34.03, 8.03], [34.25, 7.5], [34.03, 6.97], [33.68, 6.82], [33.53, 6.47], [33.0, 6.25], [32.75, 6.35], [32.68, 6.32], [32.65, 6.25], [32.75, 6.0], [32.53, 5.47], [32.0, 5.25], [31.47, 5.47], [31.25, 6.0], [31.35, 6.25], [31.32, 6.32], [31.25, 6.35], [31.0, 6.25], [30.75, 6.35], [30.5, 6.25], [30.25, 6.35], [30.0, 6.25], [29.75, 6.35], [29.5, 6.25], [29.25, 6.35], [29.0, 6.25], [28.75, 6.35], [28.68, 6.32], [28.53, 5.97], [28.0, 5.75], [27.47, 5.97], [27.32, 6.32], [26.97, 6.47], [26.75, 7.0], [26.85, 7.25], [26.82, 7.32], [26.47, 7.47], [26.25, 8.0]]]]}, "2025-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.25, 8.0], [26.47, 8.53], [26.88, 8.7], [26.75, 9.0], [26.85, 9.25], [26.75, 9.5], [26.85, 9.75], [26.75, 10.0], [26.97, 10.53], [27.32, 10.68], [27.47, 11.03], [28.0, 11.25], [28.25, 11.15], [28.5, 11.25], [28.75, 11.15], [29.0, 11.25], [29.25, 11.15], [29.5, 11.25], [29.75, 11.15], [30.0, 11.25], [30.25, 11.15], [30.5, 11.25], [31.03, 11.03], [31.18, 10.68], [31.53, 10.53], [31.75, 10.0], [31.65, 9.75], [31.68, 9.68], [31.75, 9.65], [32.0, 9.75], [32.53, 9.53], [32.75, 9.0], [32.65, 8.75], [32.68, 8.68], [33.03, 8.53], [33.18, 8.18], [33.25, 8.15], [33.5, 8.25], [34.03, 8.03], [34.25, 7.5], [34.03, 6.97], [33.68, 6.82], [33.53, 6.47], [33.0, 6.25], [32.75, 6.35], [32.68, 6.32], [32.65, 6.25], [32.75, 6.0], [32.53, 5.47], [32.0, 5.25], [31.47, 5.47], [31.25, 6.0], [31.35, 6.25], [31.32, 6.32], [31.25, 6.35], [31.0, 6.25], [30.75, 6.35], [30.5, 6.25], [30.25, 6.35], [30.0, 6.25], [29.75, 6.35], [29.5, 6.25], [29.25, 6.35], [29.0, 6.25], [28.75, 6.35], [28.68, 6.32], [28.53, 5.97], [28.0, 5.75], [27.47, 5.97], [27.32, 6.32], [26.97, 6.47], [26.75, 7.0], [26.85, 7.25], [26.82, 7.32], [26.47, 7.47], [26.25, 8.0]]]]}, "2025-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.75, 9.0], [26.97, 9.53], [27.5, 9.75], [27.75, 9.65], [27.82, 9.68], [27.85, 9.75], [27.75, 10.0], [27.97, 10.53], [28.32, 10.68], [28.47, 11.03], [29.0, 11.25], [29.53, 11.03], [29.68, 10.68], [29.75, 10.65], [30.0, 10.75], [30.53, 10.53], [30.68, 10.18], [31.03, 10.03], [31.18, 9.68], [31.53, 9.53], [31.68, 9.18], [32.03, 9.03], [32.18, 8.68], [32.25, 8.65], [32.5, 8.75], [33.03, 8.53], [33.18, 8.18], [33.25, 8.15], [33.5, 8.25], [34.03, 8.03], [34.25, 7.5], [34.03, 6.97], [33.68, 6.82], [33.53, 6.47], [33.0, 6.25], [32.75, 6.35], [32.68, 6.32], [32.65, 6.25], [32.75, 6.0], [32.53, 5.47], [32.0, 5.25], [31.47, 5.47], [31.25, 6.0], [31.35, 6.25], [31.32, 6.32], [31.0, 6.46], [30.5, 6.25], [30.25, 6.35], [30.0, 6.25], [29.5, 6.46], [29.0, 6.25], [28.75, 6.35], [28.5, 6.25], [27.97, 6.47], [27.75, 7.0], [27.85, 7.25], [27.75, 7.5], [27.88, 7.8], [27.47, 7.97], [27.32, 8.32], [26.97, 8.47], [26.75, 9.0]]]]}, "2025-03-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.47, 8.03], [30.0, 8.25], [30.53, 8.03], [30.75, 7.5], [30.65, 7.25], [30.75, 7.0], [30.53, 6.47], [30.0, 6.25], [29.47, 6.47], [29.25, 7.0], [29.35, 7.25], [29.25, 7.5], [29.47, 8.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.114926501344428}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.087476831108566}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.80887120564779, 28.966748907627277, 28.639881549304107, 28.972719213429343, 29.58532516479488, 29.40682245890298]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.80887120564779, 26.725747680664085, 27.29689178466799, 27.039317067464196, 27.68711878458663, 29.160647328694665]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6377831899241073, -3.0310056596731134, -3.4151747389097746, -3.1169145975451653, -2.6431680418990267, -2.5155599355286427]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6377831899241073, -3.9701347775333033, -4.114926501344428, -3.8735909417566177, -3.348715528397122, -2.5556412082181623]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3551746224831906, -1.655733297128155, -1.8780296654140096, -1.746648923416022, -1.5252594098295795, -1.430848819319483]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3551746224831906, -2.186107967202196, -2.284691815098969, -2.432348197648023, -1.9124010277369086, -1.4639696596291558]}}