{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:03.714811", "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-Apr-01_to_2025-Apr-06_77.5_10.0"}, "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": 2025040000045}, "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 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 06 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 54671.28123166589}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.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": 10.0}, "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": 77.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "77.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 76.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 78.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[77.5, 10.75], [78.03, 10.53], [78.25, 10.0], [78.03, 9.47], [77.5, 9.25], [76.97, 9.47], [76.75, 10.0], [76.97, 10.53], [77.5, 10.75]]]]}, "2025-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 12.03], [77.0, 12.25], [77.53, 12.03], [77.75, 11.5], [77.53, 10.97], [77.13, 10.8], [77.2, 10.63], [77.5, 10.75], [77.75, 10.65], [78.0, 10.75], [78.53, 10.53], [78.75, 10.0], [78.53, 9.47], [78.0, 9.25], [77.75, 9.35], [77.5, 9.25], [76.97, 9.47], [76.8, 9.87], [76.5, 9.75], [75.97, 9.97], [75.75, 10.5], [75.97, 11.03], [76.38, 11.2], [76.25, 11.5], [76.47, 12.03]]]]}, "2025-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.25, 11.5], [76.47, 12.03], [76.82, 12.18], [76.85, 12.25], [76.75, 12.5], [76.97, 13.03], [77.5, 13.25], [78.03, 13.03], [78.25, 12.5], [78.15, 12.25], [78.18, 12.18], [78.53, 12.03], [78.75, 11.5], [78.65, 11.25], [78.75, 11.0], [78.65, 10.75], [78.75, 10.5], [78.65, 10.25], [78.75, 10.0], [78.53, 9.47], [78.18, 9.32], [78.15, 9.25], [78.25, 9.0], [78.03, 8.47], [77.5, 8.25], [76.97, 8.47], [76.75, 9.0], [76.85, 9.25], [76.75, 9.5], [76.85, 9.75], [76.82, 9.82], [76.75, 9.85], [76.5, 9.75], [75.97, 9.97], [75.75, 10.5], [75.97, 11.03], [76.32, 11.18], [76.35, 11.25], [76.25, 11.5]]]]}, "2025-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.75, 10.5], [75.97, 11.03], [76.32, 11.18], [76.35, 11.25], [76.25, 11.5], [76.47, 12.03], [76.82, 12.18], [76.85, 12.25], [76.75, 12.5], [76.97, 13.03], [77.5, 13.25], [78.03, 13.03], [78.25, 12.5], [78.15, 12.25], [78.18, 12.18], [78.53, 12.03], [78.75, 11.5], [78.65, 11.25], [78.75, 11.0], [78.65, 10.75], [78.75, 10.5], [78.65, 10.25], [78.75, 10.0], [78.53, 9.47], [78.18, 9.32], [78.15, 9.25], [78.25, 9.0], [78.03, 8.47], [77.5, 8.25], [76.97, 8.47], [76.82, 8.82], [76.47, 8.97], [76.25, 9.5], [76.35, 9.75], [76.32, 9.82], [75.97, 9.97], [75.75, 10.5]]]]}, "2025-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.75, 10.5], [75.97, 11.03], [76.32, 11.18], [76.35, 11.25], [76.25, 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-4.223535102418964}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4716369388693984}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.812666829427087, 26.831081644694052, 26.622084554036462, 26.36037089029952, 26.35134344661941, 24.862639617919967]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.812666829427087, 25.82660573323568, 24.680825805664085, 22.60402323404952, 22.21518478393557, 22.45290654500326]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2466007626849205, -1.9526636320453434, -2.744574109230964, -2.50033527931099, -2.3712192702133934, -2.296529922249215]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m 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