{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:17.879805", "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-Jan-23_to_2025-Jan-29_46.0_2.5"}, "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": 2025010000620}, "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 23 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 29 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 129434.83215013755}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Indian-Ocean", "N.Eastern-Africa", "S.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": ["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": 2.5}, "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": 46.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 43.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 51.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.25, 5.5], [48.47, 6.03], [48.82, 6.18], [48.97, 6.53], [49.5, 6.75], [49.75, 6.65], [49.82, 6.68], [49.97, 7.03], [50.5, 7.25], [51.03, 7.03], [51.18, 6.68], [51.53, 6.53], [51.75, 6.0], [51.53, 5.47], [51.18, 5.32], [51.03, 4.97], [50.68, 4.82], [50.53, 4.47], [50.0, 4.25], [49.75, 4.35], [49.5, 4.25], [49.25, 4.35], [49.18, 4.32], [49.03, 3.97], [48.5, 3.75], [47.97, 3.97], [47.75, 4.5], [47.97, 5.03], [48.32, 5.18], [48.35, 5.25], [48.25, 5.5]]]]}, "2025-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, 0.97], [43.25, 1.5], [43.47, 2.03], [44.0, 2.25], [44.25, 2.15], [44.32, 2.18], [44.47, 2.53], [44.82, 2.68], [44.97, 3.03], [45.5, 3.25], [45.75, 3.15], [46.0, 3.25], [46.25, 3.15], [46.5, 3.25], [46.93, 3.07], [46.75, 3.5], [46.97, 4.03], [47.5, 4.25], [47.93, 4.07], [47.75, 4.5], [47.85, 4.75], [47.75, 5.0], [47.97, 5.53], [48.32, 5.68], [48.47, 6.03], [48.82, 6.18], [48.85, 6.25], [48.75, 6.5], [48.85, 6.75], [48.75, 7.0], [48.97, 7.53], [49.38, 7.7], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.53, 7.47], [50.13, 7.3], [50.2, 7.12], [50.5, 7.25], [51.03, 7.03], [51.18, 6.68], [51.53, 6.53], [51.75, 6.0], [51.53, 5.47], [51.18, 5.32], [51.03, 4.97], [50.68, 4.82], [50.53, 4.47], [50.0, 4.25], [49.75, 4.35], [49.5, 4.25], [49.25, 4.35], [49.18, 4.32], [49.03, 3.97], [48.5, 3.75], [48.07, 3.93], [48.25, 3.5], [48.03, 2.97], [47.5, 2.75], [47.07, 2.93], [47.25, 2.5], [47.03, 1.97], [46.68, 1.82], [46.53, 1.47], [46.0, 1.25], [45.75, 1.35], [45.5, 1.25], [45.25, 1.35], [45.18, 1.32], [45.03, 0.97], [44.5, 0.75], [44.25, 0.85], [44.0, 0.75], [43.47, 0.97]]]]}, "2025-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.35, 2.25], [43.25, 2.5], [43.47, 3.03], [44.0, 3.25], [44.25, 3.15], [44.5, 3.25], [44.8, 3.12], [44.97, 3.53], [45.5, 3.75], [45.75, 3.65], [45.82, 3.68], [45.97, 4.03], [46.32, 4.18], [46.47, 4.53], [47.0, 4.75], [47.25, 4.65], [47.32, 4.68], [47.47, 5.03], [47.82, 5.18], [47.97, 5.53], [48.32, 5.68], [48.47, 6.03], [48.82, 6.18], [48.85, 6.25], [48.75, 6.5], [48.85, 6.75], [48.75, 7.0], [48.97, 7.53], [49.32, 7.68], [49.35, 7.75], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.65, 7.75], [50.75, 7.5], [50.63, 7.2], [51.03, 7.03], [51.18, 6.68], [51.53, 6.53], [51.75, 6.0], [51.53, 5.47], [51.18, 5.32], [51.03, 4.97], [50.68, 4.82], [50.53, 4.47], [50.0, 4.25], [49.75, 4.35], [49.5, 4.25], [49.25, 4.35], [49.18, 4.32], [49.03, 3.97], [48.5, 3.75], [48.25, 3.85], [48.18, 3.82], [48.15, 3.75], [48.25, 3.5], [48.03, 2.97], [47.68, 2.82], [47.65, 2.75], [47.75, 2.5], [47.53, 1.97], [47.18, 1.82], [47.03, 1.47], [46.5, 1.25], [46.25, 1.35], [46.0, 1.25], [45.75, 1.35], [45.5, 1.25], [45.25, 1.35], [45.18, 1.32], [45.03, 0.97], [44.5, 0.75], [44.25, 0.85], [44.0, 0.75], [43.47, 0.97], [43.25, 1.5], [43.35, 1.75], [43.25, 2.0], [43.35, 2.25]]]]}, "2025-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.35, 2.25], [43.25, 2.5], [43.47, 3.03], [44.0, 3.25], [44.25, 3.15], [44.5, 3.25], [44.8, 3.12], [44.97, 3.53], [45.5, 3.75], [45.75, 3.65], [45.82, 3.68], [45.97, 4.03], [46.32, 4.18], [46.47, 4.53], [47.0, 4.75], [47.25, 4.65], [47.32, 4.68], [47.47, 5.03], [47.82, 5.18], [47.97, 5.53], [48.32, 5.68], [48.47, 6.03], [48.88, 6.2], [48.75, 6.5], [48.85, 6.75], [48.75, 7.0], [48.97, 7.53], [49.32, 7.68], [49.35, 7.75], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.65, 7.75], [50.75, 7.5], [50.53, 6.97], [50.18, 6.82], [50.15, 6.75], [50.25, 6.5], [50.13, 6.2], [50.53, 6.03], [50.75, 5.5], [50.53, 4.97], [50.0, 4.75], [49.5, 4.96], [49.18, 4.82], [49.03, 4.47], [48.68, 4.32], [48.53, 3.97], [48.18, 3.82], [48.15, 3.75], [48.25, 3.5], [48.03, 2.97], [47.68, 2.82], [47.65, 2.75], [47.75, 2.5], [47.53, 1.97], [47.18, 1.82], [47.03, 1.47], [46.5, 1.25], [46.25, 1.35], [46.0, 1.25], [45.75, 1.35], [45.5, 1.25], [45.25, 1.35], [45.18, 1.32], [45.03, 0.97], [44.5, 0.75], [44.25, 0.85], [44.0, 0.75], [43.47, 0.97], [43.25, 1.5], [43.35, 1.75], [43.25, 2.0], [43.35, 2.25]]]]}, "2025-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.35, 2.25], [43.25, 2.5], [43.47, 3.03], [44.0, 3.25], [44.25, 3.15], [44.5, 3.25], [44.8, 3.12], [44.97, 3.53], [45.5, 3.75], [45.75, 3.65], [45.82, 3.68], [45.97, 4.03], [46.32, 4.18], [46.47, 4.53], [47.0, 4.75], [47.25, 4.65], [47.32, 4.68], [47.47, 5.03], [47.82, 5.18], [47.97, 5.53], [48.32, 5.68], [48.47, 6.03], [48.88, 6.2], [48.75, 6.5], [48.85, 6.75], [48.75, 7.0], [48.97, 7.53], [49.32, 7.68], [49.35, 7.75], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.65, 7.75], [50.75, 7.5], [50.53, 6.97], [50.18, 6.82], [50.15, 6.75], [50.25, 6.5], [50.03, 5.97], [49.63, 5.8], [49.75, 5.5], [49.53, 4.97], [49.18, 4.82], [49.03, 4.47], [48.68, 4.32], [48.53, 3.97], [48.18, 3.82], [48.15, 3.75], [48.25, 3.5], [48.03, 2.97], [47.68, 2.82], [47.65, 2.75], [47.75, 2.5], [47.53, 1.97], [47.18, 1.82], [47.03, 1.47], [46.5, 1.25], [46.25, 1.35], [46.0, 1.25], [45.75, 1.35], [45.5, 1.25], [45.25, 1.35], [45.18, 1.32], [45.03, 0.97], [44.5, 0.75], [44.25, 0.85], [44.0, 0.75], [43.47, 0.97], [43.25, 1.5], [43.35, 1.75], [43.25, 2.0], [43.35, 2.25]]]]}, "2025-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.0, 2.75], [45.25, 2.65], [45.32, 2.68], [45.47, 3.03], [46.0, 3.25], [46.25, 3.15], [46.32, 3.18], [46.47, 3.53], [46.82, 3.68], [46.97, 4.03], [47.38, 4.2], [47.25, 4.5], [47.47, 5.03], [47.82, 5.18], [47.97, 5.53], [48.32, 5.68], [48.47, 6.03], [49.0, 6.25], [49.53, 6.03], [49.75, 5.5], [49.53, 4.97], [49.18, 4.82], [49.03, 4.47], [48.68, 4.32], [48.53, 3.97], [48.13, 3.8], [48.25, 3.5], [48.03, 2.97], [47.68, 2.82], [47.65, 2.75], [47.75, 2.5], [47.53, 1.97], [47.18, 1.82], [47.03, 1.47], [46.5, 1.25], [46.25, 1.35], [46.0, 1.25], [45.75, 1.35], [45.5, 1.25], [45.25, 1.35], [45.18, 1.32], [45.03, 0.97], [44.5, 0.75], [43.97, 0.97], [43.75, 1.5], [43.97, 2.03], [44.32, 2.18], [44.47, 2.53], [45.0, 2.75]]]]}, "2025-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, 2.5], [45.47, 3.03], [46.0, 3.25], [46.53, 3.03], [46.68, 2.68], [47.03, 2.53], [47.25, 2.0], [47.03, 1.47], [46.5, 1.25], [45.97, 1.47], [45.82, 1.82], [45.47, 1.97], [45.25, 2.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.1587348738905803}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.7322153515640084}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.02645263671883, 25.22235651260769, 25.327755531432103, 25.581842738325918, 25.652248213026212, 25.28628242688302, 25.464007314046228]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.885909016927087, 23.96833445231124, 24.025774892171228, 23.96890538533529, 24.03500645955404, 24.817895507812523, 25.398699696858728]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.6179517154716905, -0.6157139923534902, -0.8375079329083912, -0.7749346104648882, -0.7398605446791028, -0.6505680133515782, -0.5321837363595137]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.6780195588779634, -0.8026807557137658, -1.1587348738905803, -1.1556580997097399, -1.0249120353532817, -0.7613182941888681, -0.5412242903641982]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4177581198207643, -1.3881840434973907, -1.7838102348254479, -1.5952451913018324, -1.5198905924496866, -1.440173298405294, -1.1713134780805954]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5285298994026584, -1.5851970617547742, -2.51136501745762, -2.390002639069037, -2.0701646036303702, -1.6218207115678203, -1.2564242802561862]}}