{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:47.337455", "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": "2015-Apr-23_to_2015-Apr-27_78.5_14.0"}, "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": 2015040000862}, "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 23 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 2015"}, "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": 66053.78660331601}, "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": 14.0}, "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": 78.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "78.5\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": 79.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.85, 14.75], [75.75, 15.0], [75.97, 15.53], [76.5, 15.75], 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[77.0, 12.75], [77.25, 12.65], [77.32, 12.68], [77.35, 12.75], [77.32, 12.82], [76.97, 12.97], [76.82, 13.32], [76.75, 13.35], [76.5, 13.25], [75.97, 13.47], [75.75, 14.0], [75.85, 14.25], [75.75, 14.5], [75.85, 14.75]]]]}, "2015-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.85, 14.75], [75.75, 15.0], [75.97, 15.53], [76.5, 15.75], [77.0, 15.54], [77.5, 15.75], [77.75, 15.65], [78.0, 15.75], [78.53, 15.53], [78.75, 15.0], [78.65, 14.75], [78.68, 14.68], [78.75, 14.65], [79.0, 14.75], [79.53, 14.53], [79.75, 14.0], [79.65, 13.75], [79.75, 13.5], [79.65, 13.25], [79.75, 13.0], [79.53, 12.47], [79.0, 12.25], [78.75, 12.35], [78.68, 12.32], [78.53, 11.97], [78.18, 11.82], [78.03, 11.47], [77.5, 11.25], [77.25, 11.35], [77.0, 11.25], [76.47, 11.47], [76.25, 12.0], [76.47, 12.53], [77.0, 12.75], [77.25, 12.65], [77.32, 12.68], [77.35, 12.75], [77.32, 12.82], [76.97, 12.97], [76.82, 13.32], [76.75, 13.35], [76.5, 13.25], [75.97, 13.47], [75.75, 14.0], [75.85, 14.25], [75.75, 14.5], [75.85, 14.75]]]]}, "2015-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.75, 14.5], [75.97, 15.03], [76.5, 15.25], [76.8, 15.13], [76.97, 15.53], [77.5, 15.75], [77.75, 15.65], [78.0, 15.75], [78.53, 15.53], [78.75, 15.0], [78.65, 14.75], [78.68, 14.68], [78.75, 14.65], [79.0, 14.75], [79.53, 14.53], [79.75, 14.0], [79.65, 13.75], [79.75, 13.5], [79.65, 13.25], [79.75, 13.0], [79.53, 12.47], [79.0, 12.25], [78.75, 12.35], [78.68, 12.32], [78.53, 11.97], [78.18, 11.82], [78.03, 11.47], [77.5, 11.25], [77.25, 11.35], [77.0, 11.25], [76.47, 11.47], [76.25, 12.0], [76.47, 12.53], [77.0, 12.75], [77.25, 12.65], [77.32, 12.68], [77.35, 12.75], [77.32, 12.82], [76.97, 12.97], [76.82, 13.32], [76.47, 13.47], [76.32, 13.82], [75.97, 13.97], [75.75, 14.5]]]]}, "2015-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[77.25, 13.0], [77.35, 13.25], [77.25, 13.5], [77.46, 14.0], [77.25, 14.5], [77.35, 14.75], [77.25, 15.0], 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[24.95793842904385, 24.792705867136533, 24.162868185121397, 24.260953211312312, 25.522101789174712]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2173422383363044, -2.776912491525373, -2.7242991521625712, -2.666864259011882, -1.9224205304545434]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.7690404589844206, -4.365236632001086, -3.4015200642022023, -3.5610014093569475, -2.1885048551606587]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4906361273419908, -1.863573354770047, -1.846466916755476, -1.8714514404866507, -1.3903650702111134]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7454346380779309, -2.8183681909245757, -2.299772302428176, -2.4204362132820245, -1.5342680876977302]}}