{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:53.019235", "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-Nov-27_to_2025-Nov-30_76.0_13.5"}, "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": 2025110000753}, "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": "November 27 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 30 2025"}, "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": 107884.36501709893}, "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": ["India"]}, "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": 13.5}, "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": 76.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "76.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 75.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 78.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[75.0, 16.75], [75.53, 16.53], [75.68, 16.18], [75.75, 16.15], [75.82, 16.18], [75.97, 16.53], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.25, 16.65], [77.32, 16.68], [77.47, 17.03], [78.0, 17.25], [78.53, 17.03], [78.75, 16.5], [78.65, 16.25], [78.75, 16.0], [78.53, 15.47], [78.18, 15.32], [78.03, 14.97], [77.68, 14.82], [77.65, 14.75], [77.75, 14.5], [77.65, 14.25], [77.75, 14.0], [77.65, 13.75], [77.75, 13.5], [77.65, 13.25], [77.75, 13.0], [77.53, 12.47], [77.18, 12.32], [77.15, 12.25], [77.18, 12.18], [77.53, 12.03], [77.75, 11.5], [77.53, 10.97], [77.18, 10.82], [77.03, 10.47], [76.5, 10.25], [75.97, 10.47], [75.82, 10.82], [75.47, 10.97], [75.25, 11.5], [75.35, 11.75], [75.25, 12.0], [75.35, 12.25], [75.32, 12.32], [74.97, 12.47], [74.75, 13.0], [74.85, 13.25], [74.75, 13.5], [74.96, 14.0], [74.75, 14.5], [74.96, 15.0], [74.82, 15.32], [74.47, 15.47], [74.25, 16.0], [74.47, 16.53], [75.0, 16.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.47, 15.47], [74.25, 16.0], [74.47, 16.53], [75.0, 16.75], [75.53, 16.53], [75.68, 16.18], [75.75, 16.15], [75.82, 16.18], [75.97, 16.53], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.25, 16.65], [77.5, 16.75], [78.03, 16.53], [78.25, 16.0], [78.03, 15.47], [77.68, 15.32], [77.65, 15.25], [77.75, 15.0], [77.65, 14.75], [77.75, 14.5], [77.54, 14.0], [77.75, 13.5], [77.65, 13.25], [77.75, 13.0], [77.53, 12.47], [77.18, 12.32], [77.15, 12.25], [77.18, 12.18], [77.53, 12.03], [77.75, 11.5], [77.53, 10.97], [77.18, 10.82], [77.03, 10.47], [76.5, 10.25], [75.97, 10.47], [75.82, 10.82], [75.47, 10.97], [75.25, 11.5], [75.35, 11.75], [75.25, 12.0], [75.35, 12.25], [75.32, 12.32], [74.97, 12.47], [74.75, 13.0], [74.85, 13.25], [74.75, 13.5], [74.96, 14.0], [74.75, 14.5], [74.96, 15.0], [74.82, 15.32], [74.47, 15.47]]]]}, "2025-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.47, 15.47], [74.25, 16.0], [74.47, 16.53], [75.0, 16.75], [75.53, 16.53], [75.68, 16.18], [75.75, 16.15], [75.82, 16.18], [75.97, 16.53], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.25, 16.65], [77.32, 16.68], [77.47, 17.03], [78.0, 17.25], [78.53, 17.03], [78.75, 16.5], [78.65, 16.25], [78.75, 16.0], [78.53, 15.47], [78.18, 15.32], [78.03, 14.97], [77.68, 14.82], [77.65, 14.75], [77.75, 14.5], [77.65, 14.25], [77.75, 14.0], [77.65, 13.75], [77.75, 13.5], [77.65, 13.25], [77.75, 13.0], [77.53, 12.47], [77.18, 12.32], [77.15, 12.25], [77.18, 12.18], [77.53, 12.03], [77.75, 11.5], [77.53, 10.97], [77.18, 10.82], [77.03, 10.47], [76.5, 10.25], [75.97, 10.47], [75.82, 10.82], [75.47, 10.97], [75.25, 11.5], [75.35, 11.75], [75.25, 12.0], [75.35, 12.25], [75.32, 12.32], [74.97, 12.47], [74.75, 13.0], [74.85, 13.25], [74.75, 13.5], [74.96, 14.0], [74.75, 14.5], [74.96, 15.0], [74.82, 15.32], [74.47, 15.47]]]]}, 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15.47]]]]}, "2025-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.25, 14.0], [75.47, 14.53], [75.82, 14.68], [75.97, 15.03], [76.32, 15.18], [76.35, 15.25], [76.25, 15.5], [76.47, 16.03], [76.82, 16.18], [76.97, 16.53], [77.32, 16.68], [77.47, 17.03], [78.0, 17.25], [78.53, 17.03], [78.75, 16.5], [78.65, 16.25], [78.75, 16.0], [78.53, 15.47], [78.18, 15.32], [78.03, 14.97], [77.68, 14.82], [77.65, 14.75], [77.75, 14.5], [77.65, 14.25], [77.75, 14.0], [77.65, 13.75], [77.75, 13.5], [77.65, 13.25], [77.75, 13.0], [77.53, 12.47], [77.0, 12.25], [76.75, 12.35], [76.5, 12.25], [75.97, 12.47], [75.82, 12.82], [75.47, 12.97], [75.25, 13.5], [75.35, 13.75], [75.25, 14.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.8776147901597824}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9466355460476517}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.48153076171883, 21.351925715693767, 21.205313901548095, 21.39270172119143]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.073536173502646, 18.82000885009768, 19.084853108723962, 19.922527567545615]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7872271842048733, -1.974656758578596, -2.0674177800846474, -1.9306445149553433]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.340946112965298, -2.801600009650258, -2.8776147901597824, -2.508649736178711]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.646537062544632, -1.8193780348722552, -1.9209192870099498, -1.6805598149533378]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1443181749139333, -2.5239563758433188, -2.732286085537579, -2.1709074653909]}}