{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:59:32.347574", "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": "2026-May-01_to_2026-May-04_93.5_33.0"}, "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": 2026050000058}, "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": "May 01 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 04 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 67485.70110582976}, "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": ["China"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau"]}, "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": 33.0}, "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": 93.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "93.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 92.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 96.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 33.53], [93.0, 33.75], [93.25, 33.65], [93.38, 33.7], [93.25, 34.0], [93.47, 34.53], [94.0, 34.75], [94.25, 34.65], [94.5, 34.75], [94.75, 34.65], [95.0, 34.75], [95.53, 34.53], [95.68, 34.18], [96.03, 34.03], [96.18, 33.68], [96.53, 33.53], [96.75, 33.0], [96.53, 32.47], [96.18, 32.32], [96.03, 31.97], [95.5, 31.75], [95.25, 31.85], [95.0, 31.75], [94.75, 31.85], [94.5, 31.75], [94.25, 31.85], [94.0, 31.75], [93.75, 31.85], [93.5, 31.75], [93.25, 31.85], [93.0, 31.75], [92.47, 31.97], [92.25, 32.5], [92.35, 32.75], [92.25, 33.0], [92.47, 33.53]]]]}, "2026-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 33.53], [92.82, 33.68], [92.97, 34.03], [93.32, 34.18], [93.47, 34.53], [94.0, 34.75], [94.25, 34.65], [94.5, 34.75], [94.75, 34.65], [95.0, 34.75], [95.53, 34.53], [95.68, 34.18], [96.03, 34.03], [96.18, 33.68], [96.53, 33.53], [96.75, 33.0], [96.54, 32.5], [96.75, 32.0], [96.65, 31.75], [96.75, 31.5], [96.53, 30.97], [96.0, 30.75], [95.47, 30.97], [95.32, 31.32], [95.25, 31.35], [95.0, 31.25], [94.75, 31.35], [94.5, 31.25], [93.97, 31.47], [93.82, 31.82], [93.75, 31.85], [93.5, 31.75], [93.25, 31.85], [93.0, 31.75], [92.47, 31.97], [92.25, 32.5], [92.35, 32.75], [92.25, 33.0], [92.47, 33.53]]]]}, "2026-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 33.53], [92.82, 33.68], [92.97, 34.03], [93.32, 34.18], [93.47, 34.53], [94.0, 34.75], [94.25, 34.65], [94.5, 34.75], [94.75, 34.65], [95.0, 34.75], [95.53, 34.53], [95.68, 34.18], [96.03, 34.03], [96.18, 33.68], [96.53, 33.53], [96.75, 33.0], [96.54, 32.5], [96.75, 32.0], [96.65, 31.75], [96.75, 31.5], [96.53, 30.97], [96.0, 30.75], [95.47, 30.97], [95.32, 31.32], [95.25, 31.35], [95.0, 31.25], [94.75, 31.35], [94.5, 31.25], [93.97, 31.47], [93.82, 31.82], [93.75, 31.85], [93.5, 31.75], [93.25, 31.85], [93.0, 31.75], [92.47, 31.97], [92.25, 32.5], [92.35, 32.75], [92.25, 33.0], [92.47, 33.53]]]]}, "2026-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 33.53], [92.82, 33.68], [92.97, 34.03], [93.5, 34.25], [93.75, 34.15], [93.82, 34.18], [93.97, 34.53], [94.5, 34.75], [94.75, 34.65], [95.0, 34.75], [95.53, 34.53], [95.68, 34.18], [96.03, 34.03], [96.25, 33.5], [96.03, 32.97], [95.63, 32.8], [95.68, 32.68], [95.75, 32.65], [96.0, 32.75], [96.53, 32.53], [96.75, 32.0], [96.65, 31.75], [96.75, 31.5], [96.53, 30.97], [96.0, 30.75], [95.47, 30.97], [95.32, 31.32], [95.25, 31.35], [95.0, 31.25], [94.75, 31.35], [94.5, 31.25], [93.97, 31.47], [93.82, 31.82], [93.75, 31.85], [93.5, 31.75], [93.25, 31.85], [93.0, 31.75], [92.47, 31.97], [92.25, 32.5], [92.35, 32.75], [92.25, 33.0], [92.47, 33.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.028863262128311}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.61446413634103}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.353486392372531, -10.815710840469706, -12.590283408531775, -9.775004852027166]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.575174077351846, -13.798204803466774, -16.1595634460449, -12.472086334228493]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.769420039613465, -6.628653812051145, -8.60249280454043, -5.719630499297682]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.492400548240369, -9.572531004008852, -13.028863262128311, -9.041040288215697]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6594436536442354, -2.3645083347614837, -3.1370774721840715, -2.1424017555925707]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.065087607508828, -2.983316540283693, -3.999755126711509, -2.845238350187034]}}