{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:52.517498", "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-Sep-13_to_2025-Sep-17_54.0_39.5"}, "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": 2025090000327}, "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": "September 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 17 2025"}, "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": 71790.02313302353}, "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": ["Turkmenistan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 39.5}, "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": 54.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "54.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 52.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 57.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, 38.97], [52.25, 39.5], [52.47, 40.03], [53.0, 40.25], [53.5, 40.04], [54.0, 40.25], [54.53, 40.03], [54.75, 39.5], [54.53, 38.97], [54.0, 38.75], [53.5, 38.96], [53.0, 38.75], [52.47, 38.97]]]]}, "2025-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.75, 38.5], [51.97, 39.03], [52.38, 39.2], [52.25, 39.5], [52.35, 39.75], [52.25, 40.0], [52.35, 40.25], [52.25, 40.5], [52.47, 41.03], [53.0, 41.25], [53.53, 41.03], [53.68, 40.68], [53.75, 40.65], [54.0, 40.75], [54.25, 40.65], [54.5, 40.75], [54.75, 40.65], [55.0, 40.75], [55.25, 40.65], [55.5, 40.75], [56.03, 40.53], [56.18, 40.18], [56.25, 40.15], [56.5, 40.25], [56.75, 40.15], [57.0, 40.25], [57.53, 40.03], [57.68, 39.68], [58.03, 39.53], [58.25, 39.0], [58.03, 38.47], [57.5, 38.25], [57.0, 38.46], [56.5, 38.25], [56.25, 38.35], [56.0, 38.25], [55.75, 38.35], [55.5, 38.25], [55.25, 38.35], [55.0, 38.25], [54.75, 38.35], [54.68, 38.32], [54.53, 37.97], [54.18, 37.82], [54.03, 37.47], [53.5, 37.25], [53.25, 37.35], [53.0, 37.25], [52.47, 37.47], [52.32, 37.82], [51.97, 37.97], [51.75, 38.5]]]]}, "2025-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.75, 38.5], [51.97, 39.03], [52.38, 39.2], [52.25, 39.5], [52.35, 39.75], [52.25, 40.0], [52.35, 40.25], [52.25, 40.5], [52.47, 41.03], [53.0, 41.25], [53.53, 41.03], [53.68, 40.68], [53.75, 40.65], [54.0, 40.75], [54.25, 40.65], [54.5, 40.75], [54.75, 40.65], [55.0, 40.75], [55.25, 40.65], [55.5, 40.75], [56.03, 40.53], [56.18, 40.18], [56.25, 40.15], [56.5, 40.25], [56.75, 40.15], [57.0, 40.25], [57.53, 40.03], [57.68, 39.68], [58.03, 39.53], [58.25, 39.0], [58.03, 38.47], [57.5, 38.25], [57.0, 38.46], [56.5, 38.25], [56.25, 38.35], [56.0, 38.25], [55.75, 38.35], [55.5, 38.25], [55.25, 38.35], [55.0, 38.25], [54.75, 38.35], [54.68, 38.32], [54.53, 37.97], [54.18, 37.82], [54.03, 37.47], [53.5, 37.25], [53.25, 37.35], [53.0, 37.25], [52.47, 37.47], [52.32, 37.82], [51.97, 37.97], [51.75, 38.5]]]]}, "2025-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.75, 38.5], [51.97, 39.03], [52.38, 39.2], [52.25, 39.5], [52.35, 39.75], [52.25, 40.0], [52.35, 40.25], [52.25, 40.5], [52.47, 41.03], [53.0, 41.25], [53.53, 41.03], [53.68, 40.68], [53.75, 40.65], [54.0, 40.75], [54.25, 40.65], [54.5, 40.75], [54.75, 40.65], [55.0, 40.75], [55.25, 40.65], [55.5, 40.75], [56.03, 40.53], [56.18, 40.18], [56.25, 40.15], [56.5, 40.25], [56.75, 40.15], [57.0, 40.25], [57.53, 40.03], [57.68, 39.68], [58.03, 39.53], [58.25, 39.0], [58.03, 38.47], [57.5, 38.25], [57.0, 38.46], [56.5, 38.25], [56.25, 38.35], [56.0, 38.25], [55.75, 38.35], [55.5, 38.25], [55.25, 38.35], [55.0, 38.25], [54.75, 38.35], [54.68, 38.32], [54.53, 37.97], [54.18, 37.82], [54.03, 37.47], [53.5, 37.25], [53.25, 37.35], [53.0, 37.25], [52.47, 37.47], [52.32, 37.82], [51.97, 37.97], [51.75, 38.5]]]]}, "2025-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.75, 39.5], [52.97, 40.03], [53.5, 40.25], [53.75, 40.15], [54.0, 40.25], [54.25, 40.15], [54.5, 40.25], [54.75, 40.15], [55.0, 40.25], [55.25, 40.15], [55.5, 40.25], [55.75, 40.15], [56.0, 40.25], [56.25, 40.15], [56.5, 40.25], [56.75, 40.15], [57.0, 40.25], [57.53, 40.03], [57.75, 39.5], [57.53, 38.97], [57.18, 38.82], [57.03, 38.47], [56.5, 38.25], [56.25, 38.35], [56.0, 38.25], [55.75, 38.35], [55.5, 38.25], [55.25, 38.35], [55.0, 38.25], [54.75, 38.35], [54.5, 38.25], [54.25, 38.35], [54.0, 38.25], [53.47, 38.47], [53.32, 38.82], [52.97, 38.97], [52.75, 39.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.004889648309131}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.101880010016868}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.12648162841799, 20.464869859483485, 18.689364454481336, 20.099138217502173, 20.1289321172805]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.02736053466799, 17.75069071451827, 16.05937856038412, 18.11890818277999, 18.587579345703148]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5667071161365698, -4.719830014348986, -6.265622319302046, -4.630519679398878, -4.656193317001262]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.363931111762554, -6.511103947394645, -8.004889648309131, -6.608267682269798, -5.279192620972594]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5854349860980488, -1.928512705903389, -2.512439264735564, -1.8224788805409267, -1.7051293074202705]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7378683779468134, -2.5572674741213666, -3.092650561827251, -2.4556252304100052, -1.930282197703693]}}