{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:59:14.166850", "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-Apr-12_to_2026-Apr-16_88.5_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": 2026040000338}, "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": "April 12 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 16 2026"}, "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": 62318.66402998726}, "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": 88.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "88.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 85.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 93.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[88.5, 33.75], [89.03, 33.53], [89.25, 33.0], [89.03, 32.47], [88.5, 32.25], [87.97, 32.47], [87.75, 33.0], [87.97, 33.53], [88.5, 33.75]]]]}, "2026-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.47, 32.97], [85.25, 33.5], [85.47, 34.03], [86.0, 34.25], [86.25, 34.15], [86.5, 34.25], [86.75, 34.15], [87.0, 34.25], [87.53, 34.03], [87.68, 33.68], [87.75, 33.65], [88.0, 33.75], [88.25, 33.65], [88.5, 33.75], [88.75, 33.65], [89.0, 33.75], [89.25, 33.65], [89.5, 33.75], [89.75, 33.65], [90.0, 33.75], [90.53, 33.53], [90.75, 33.0], [90.65, 32.75], [90.75, 32.5], [90.53, 31.97], [90.0, 31.75], [89.5, 31.96], [89.0, 31.75], [88.75, 31.85], [88.5, 31.75], [87.97, 31.97], [87.82, 32.32], [87.75, 32.35], [87.5, 32.25], [86.97, 32.47], [86.82, 32.82], [86.75, 32.85], [86.5, 32.75], [86.25, 32.85], [86.0, 32.75], [85.47, 32.97]]]]}, "2026-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.47, 32.97], [85.25, 33.5], [85.47, 34.03], [86.0, 34.25], [86.25, 34.15], [86.5, 34.25], [86.75, 34.15], [87.0, 34.25], [87.53, 34.03], [87.68, 33.68], [87.75, 33.65], [88.0, 33.75], [88.25, 33.65], [88.5, 33.75], [88.75, 33.65], [89.0, 33.75], [89.25, 33.65], [89.5, 33.75], [89.75, 33.65], [90.0, 33.75], [90.25, 33.65], [90.32, 33.68], [90.47, 34.03], [91.0, 34.25], [91.53, 34.03], [91.7, 33.63], [92.0, 33.75], [92.25, 33.65], [92.5, 33.75], [93.03, 33.53], [93.18, 33.18], [93.25, 33.15], [93.5, 33.25], [94.03, 33.03], [94.25, 32.5], [94.03, 31.97], [93.5, 31.75], [93.25, 31.85], [93.18, 31.82], [93.03, 31.47], [92.5, 31.25], [91.97, 31.47], [91.82, 31.82], [91.75, 31.85], [91.5, 31.75], [91.25, 31.85], [91.0, 31.75], [90.5, 31.96], [90.0, 31.75], [89.5, 31.96], [89.0, 31.75], [88.75, 31.85], [88.5, 31.75], [87.97, 31.97], [87.82, 32.32], [87.75, 32.35], [87.5, 32.25], [86.97, 32.47], [86.82, 32.82], [86.75, 32.85], [86.5, 32.75], [86.25, 32.85], [86.0, 32.75], [85.47, 32.97]]]]}, "2026-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.47, 32.97], [85.25, 33.5], [85.47, 34.03], [86.0, 34.25], [86.25, 34.15], [86.5, 34.25], [86.75, 34.15], [87.0, 34.25], [87.53, 34.03], [87.68, 33.68], [87.75, 33.65], [88.0, 33.75], [88.25, 33.65], [88.5, 33.75], [88.75, 33.65], [89.0, 33.75], [89.25, 33.65], [89.5, 33.75], [89.75, 33.65], [90.0, 33.75], [90.25, 33.65], [90.32, 33.68], [90.47, 34.03], [91.0, 34.25], [91.53, 34.03], [91.7, 33.63], [92.0, 33.75], [92.25, 33.65], [92.5, 33.75], [93.03, 33.53], [93.18, 33.18], [93.25, 33.15], [93.5, 33.25], [94.03, 33.03], [94.25, 32.5], [94.03, 31.97], [93.5, 31.75], [93.25, 31.85], [93.18, 31.82], [93.03, 31.47], [92.5, 31.25], [91.97, 31.47], [91.82, 31.82], [91.75, 31.85], [91.5, 31.75], [91.25, 31.85], [91.0, 31.75], [90.5, 31.96], [90.0, 31.75], [89.5, 31.96], [89.0, 31.75], [88.75, 31.85], [88.5, 31.75], [87.97, 31.97], [87.82, 32.32], [87.75, 32.35], [87.5, 32.25], [86.97, 32.47], [86.82, 32.82], [86.75, 32.85], [86.5, 32.75], [86.25, 32.85], [86.0, 32.75], [85.47, 32.97]]]]}, "2026-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.75, 33.0], [89.97, 33.53], [90.32, 33.68], [90.47, 34.03], [91.0, 34.25], [91.53, 34.03], [91.7, 33.63], [92.0, 33.75], [92.25, 33.65], [92.5, 33.75], [93.03, 33.53], [93.18, 33.18], [93.25, 33.15], [93.5, 33.25], [94.03, 33.03], [94.25, 32.5], [94.03, 31.97], [93.5, 31.75], [93.25, 31.85], [93.18, 31.82], [93.03, 31.47], [92.5, 31.25], [91.97, 31.47], [91.82, 31.82], [91.75, 31.85], [91.5, 31.75], [91.25, 31.85], [91.0, 31.75], [90.47, 31.97], [90.32, 32.32], [89.97, 32.47], [89.75, 33.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.442893986898014}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.412182816832465}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.303275807698526, -8.59617207845048, -11.09990664058256, -11.100307872560279, -13.785217083824989]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-9.303275807698526, -11.37266133626298, -15.054907862345374, -15.41124827067057, -16.204175694783487]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.779421810939027, -4.625094496260232, -5.313268371516176, -5.4791854234023845, -6.315824898721895]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.779421810939027, -5.461535304300298, -7.020575999518712, -6.590124972315266, -8.442893986898014]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5392850008732037, -1.5306547680688665, -1.6840858773363099, -1.7692125120565796, -1.953453899076867]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5392850008732037, -1.7836189705760297, -2.274054174515515, -2.660203369002397, -2.4560252700222436]}}