{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:07.061029", "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": "2011-Apr-02_to_2011-Apr-06_75.0_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": 2011040000174}, "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 02 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 06 2011"}, "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": 95247.40614036015}, "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": ["Arabian Sea", "Laccadive Sea"]}, "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": 75.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "75.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 73.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 76.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.5, 18.75], [74.03, 18.53], [74.25, 18.0], [74.03, 17.47], [73.5, 17.25], [72.97, 17.47], [72.75, 18.0], [72.97, 18.53], [73.5, 18.75]]]]}, "2011-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.85, 16.75], [72.75, 17.0], [72.85, 17.25], [72.75, 17.5], [72.85, 17.75], [72.75, 18.0], [72.97, 18.53], [73.5, 18.75], [74.03, 18.53], [74.18, 18.18], [74.53, 18.03], [74.68, 17.68], [75.03, 17.53], [75.18, 17.18], [75.53, 17.03], [75.75, 16.5], [75.65, 16.25], [75.68, 16.18], [76.03, 16.03], [76.18, 15.68], [76.25, 15.65], [76.5, 15.75], [77.03, 15.53], [77.25, 15.0], [77.03, 14.47], [76.68, 14.32], [76.53, 13.97], [76.18, 13.82], [76.03, 13.47], [75.68, 13.32], [75.53, 12.97], [75.0, 12.75], [74.47, 12.97], [74.32, 13.32], [73.97, 13.47], [73.75, 14.0], [73.85, 14.25], [73.82, 14.32], [73.47, 14.47], [73.25, 15.0], [73.35, 15.25], [73.32, 15.32], [72.97, 15.47], [72.75, 16.0], [72.85, 16.25], [72.75, 16.5], [72.85, 16.75]]]]}, "2011-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.85, 16.75], [72.75, 17.0], [72.85, 17.25], [72.75, 17.5], [72.85, 17.75], [72.75, 18.0], [72.97, 18.53], [73.5, 18.75], [74.03, 18.53], [74.18, 18.18], [74.53, 18.03], [74.68, 17.68], [75.03, 17.53], [75.18, 17.18], [75.53, 17.03], [75.75, 16.5], [75.65, 16.25], [75.68, 16.18], [76.03, 16.03], [76.18, 15.68], [76.25, 15.65], [76.5, 15.75], [77.03, 15.53], [77.25, 15.0], [77.03, 14.47], [76.68, 14.32], [76.53, 13.97], [76.18, 13.82], [76.03, 13.47], [75.68, 13.32], [75.53, 12.97], [75.0, 12.75], [74.47, 12.97], [74.32, 13.32], [73.97, 13.47], [73.75, 14.0], [73.85, 14.25], [73.82, 14.32], [73.47, 14.47], [73.25, 15.0], [73.35, 15.25], [73.32, 15.32], [72.97, 15.47], [72.75, 16.0], [72.85, 16.25], [72.75, 16.5], [72.85, 16.75]]]]}, "2011-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.85, 16.75], [72.75, 17.0], [72.85, 17.25], [72.75, 17.5], [72.85, 17.75], [72.75, 18.0], [72.97, 18.53], [73.5, 18.75], [74.03, 18.53], [74.18, 18.18], [74.53, 18.03], [74.68, 17.68], [75.03, 17.53], [75.18, 17.18], [75.53, 17.03], [75.75, 16.5], [75.65, 16.25], [75.68, 16.18], [76.03, 16.03], [76.18, 15.68], [76.25, 15.65], [76.5, 15.75], [77.03, 15.53], [77.25, 15.0], [77.03, 14.47], [76.68, 14.32], [76.53, 13.97], [76.18, 13.82], [76.03, 13.47], [75.68, 13.32], [75.53, 12.97], [75.0, 12.75], [74.47, 12.97], [74.32, 13.32], [73.97, 13.47], [73.75, 14.0], [73.85, 14.25], [73.82, 14.32], [73.47, 14.47], [73.25, 15.0], [73.35, 15.25], [73.32, 15.32], [72.97, 15.47], [72.75, 16.0], [72.85, 16.25], [72.75, 16.5], [72.85, 16.75]]]]}, "2011-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.97, 17.53], [73.5, 17.75], [74.03, 17.53], [74.2, 17.13], [74.5, 17.25], [75.03, 17.03], [75.25, 16.5], [75.04, 16.0], [75.18, 15.68], [75.25, 15.65], [75.5, 15.75], [76.03, 15.53], [76.25, 15.0], [76.15, 14.75], [76.25, 14.5], [76.03, 13.97], [75.63, 13.8], [75.75, 13.5], [75.53, 12.97], [75.0, 12.75], [74.47, 12.97], [74.25, 13.5], [74.38, 13.8], [73.97, 13.97], [73.75, 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