{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:19.062079", "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-Jan-09_to_2026-Jan-13_79.5_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": 2026010000338}, "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": "January 09 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 13 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": 51678.3989454344}, "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": ["Bay of Bengal", "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": 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": 79.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "79.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 77.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 80.25}, "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": 12.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.35, 9.75], [78.25, 10.0], [78.35, 10.25], [78.25, 10.5], [78.47, 11.03], [78.82, 11.18], [78.97, 11.53], [79.5, 11.75], [80.03, 11.53], [80.25, 11.0], [80.15, 10.75], [80.25, 10.5], [80.15, 10.25], [80.18, 10.18], [80.53, 10.03], [80.75, 9.5], [80.53, 8.97], [80.0, 8.75], [79.75, 8.85], [79.68, 8.82], [79.53, 8.47], [79.0, 8.25], [78.47, 8.47], [78.25, 9.0], [78.35, 9.25], [78.25, 9.5], [78.35, 9.75]]]]}, "2026-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.75, 11.0], [76.97, 11.53], [77.32, 11.68], [77.35, 11.75], [77.25, 12.0], [77.47, 12.53], [78.0, 12.75], [78.53, 12.53], [78.75, 12.0], [78.65, 11.75], [78.7, 11.63], [79.0, 11.75], [79.25, 11.65], [79.5, 11.75], [80.03, 11.53], [80.25, 11.0], [80.15, 10.75], [80.25, 10.5], [80.15, 10.25], [80.18, 10.18], [80.53, 10.03], [80.75, 9.5], [80.53, 8.97], [80.0, 8.75], [79.75, 8.85], [79.68, 8.82], [79.53, 8.47], [79.0, 8.25], [78.47, 8.47], [78.25, 9.0], [78.35, 9.25], [78.32, 9.32], [77.97, 9.47], [77.82, 9.82], [77.47, 9.97], [77.32, 10.32], [76.97, 10.47], [76.75, 11.0]]]]}, "2026-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.75, 11.0], [76.97, 11.53], [77.32, 11.68], [77.35, 11.75], [77.25, 12.0], [77.47, 12.53], [78.0, 12.75], [78.53, 12.53], [78.75, 12.0], [78.65, 11.75], [78.7, 11.63], [79.0, 11.75], [79.25, 11.65], [79.5, 11.75], [80.03, 11.53], [80.25, 11.0], [80.15, 10.75], [80.25, 10.5], [80.15, 10.25], [80.18, 10.18], [80.53, 10.03], [80.75, 9.5], [80.53, 8.97], [80.0, 8.75], [79.75, 8.85], [79.68, 8.82], [79.53, 8.47], [79.0, 8.25], [78.47, 8.47], [78.25, 9.0], [78.35, 9.25], [78.32, 9.32], [77.97, 9.47], [77.82, 9.82], [77.47, 9.97], [77.32, 10.32], [76.97, 10.47], [76.75, 11.0]]]]}, "2026-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.75, 11.0], [76.97, 11.53], [77.32, 11.68], [77.35, 11.75], [77.25, 12.0], [77.47, 12.53], [78.0, 12.75], [78.53, 12.53], [78.75, 12.0], [78.65, 11.75], [78.7, 11.63], [79.0, 11.75], [79.25, 11.65], [79.5, 11.75], [80.03, 11.53], [80.25, 11.0], [80.15, 10.75], [80.25, 10.5], [80.15, 10.25], [80.25, 10.0], [80.15, 9.75], [80.25, 9.5], [80.03, 8.97], [79.68, 8.82], [79.53, 8.47], [79.0, 8.25], [78.47, 8.47], [78.25, 9.0], [78.35, 9.25], [78.32, 9.32], [77.97, 9.47], [77.82, 9.82], [77.47, 9.97], [77.32, 10.32], [76.97, 10.47], [76.75, 11.0]]]]}, "2026-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.75, 11.0], [76.97, 11.53], [77.5, 11.75], [77.75, 11.65], [78.0, 11.75], [78.53, 11.53], [78.68, 11.18], [78.75, 11.15], [79.0, 11.25], [79.53, 11.03], [79.68, 10.68], [80.03, 10.53], [80.25, 10.0], [80.15, 9.75], [80.25, 9.5], [80.03, 8.97], [79.68, 8.82], [79.53, 8.47], [79.0, 8.25], [78.47, 8.47], [78.25, 9.0], [78.35, 9.25], [78.32, 9.32], [77.97, 9.47], [77.82, 9.82], [77.47, 9.97], [77.32, 10.32], [76.97, 10.47], [76.75, 11.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.5284561308765205}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.489034679739308}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.112542018183944, 23.485680778353867, 23.657162565343583, 23.90289459228518, 23.770400214917743]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.69583918253585, 21.269061024983728, 21.40570729573568, 22.01312917073568, 22.51178131103518]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3542794673574197, -1.7127906324575841, -1.524287272528996, -1.2399757994403728, -1.5612704727015407]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8353618688711322, -2.482598510860953, -2.5284561308765205, -1.7439822520541384, -2.473977682396594]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.300369041993137, -2.1827505332179387, -1.8552707659529564, -1.5642977779144325, -2.07259701966191]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.5632818021481283, -2.8726370152982974, -2.5749255357641685, -2.2261220356077716, -2.5403305563939766]}}