{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:26.575006", "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": "2021-Nov-08_to_2021-Nov-12_77.5_12.0"}, "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": 2021110000333}, "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 08 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 12 2021"}, "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": 69704.56328330343}, "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", "Sri Lanka"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 12.0}, "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": 76.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 79.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[77.5, 13.25], [78.03, 13.03], [78.18, 12.68], [78.25, 12.65], [78.5, 12.75], [78.75, 12.65], [79.0, 12.75], [79.53, 12.53], [79.68, 12.18], [80.03, 12.03], [80.25, 11.5], [80.15, 11.25], [80.25, 11.0], [80.15, 10.75], [80.25, 10.5], [80.15, 10.25], [80.25, 10.0], [80.03, 9.47], [79.5, 9.25], [79.25, 9.35], [79.0, 9.25], [78.47, 9.47], [78.32, 9.82], [78.25, 9.85], [78.0, 9.75], [77.47, 9.97], [77.25, 10.5], [77.35, 10.75], [77.32, 10.82], [76.97, 10.97], [76.82, 11.32], [76.75, 11.35], [76.5, 11.25], [75.97, 11.47], [75.75, 12.0], [75.97, 12.53], [76.32, 12.68], [76.47, 13.03], [77.0, 13.25], [77.25, 13.15], [77.5, 13.25]]]]}}, "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": {"2021-11-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 13.03], [77.0, 13.25], [77.25, 13.15], [77.5, 13.25], [78.03, 13.03], [78.18, 12.68], [78.53, 12.53], [78.75, 12.0], [78.65, 11.75], [78.68, 11.68], [78.75, 11.65], [78.82, 11.68], [78.97, 12.03], [79.5, 12.25], [80.03, 12.03], [80.25, 11.5], [80.15, 11.25], [80.25, 11.0], [80.15, 10.75], [80.25, 10.5], [80.15, 10.25], [80.25, 10.0], [80.03, 9.47], [79.5, 9.25], [79.25, 9.35], [79.0, 9.25], [78.47, 9.47], [78.32, 9.82], [78.25, 9.85], [78.0, 9.75], [77.47, 9.97], [77.25, 10.5], [77.35, 10.75], [77.32, 10.82], [76.97, 10.97], [76.82, 11.32], [76.75, 11.35], [76.5, 11.25], [75.97, 11.47], [75.75, 12.0], [75.97, 12.53], [76.32, 12.68], [76.47, 13.03]]]]}, "2021-11-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 13.03], [77.0, 13.25], [77.25, 13.15], [77.5, 13.25], [78.03, 13.03], [78.18, 12.68], [78.25, 12.65], [78.5, 12.75], [79.03, 12.53], [79.18, 12.18], [79.25, 12.15], [79.5, 12.25], [80.03, 12.03], [80.25, 11.5], [80.15, 11.25], [80.25, 11.0], [80.15, 10.75], [80.25, 10.5], [80.15, 10.25], [80.25, 10.0], [80.03, 9.47], [79.5, 9.25], [79.25, 9.35], [79.0, 9.25], [78.47, 9.47], [78.32, 9.82], [78.25, 9.85], [78.0, 9.75], [77.47, 9.97], [77.25, 10.5], [77.35, 10.75], [77.32, 10.82], [76.97, 10.97], [76.82, 11.32], [76.75, 11.35], [76.5, 11.25], [75.97, 11.47], [75.75, 12.0], [75.97, 12.53], [76.32, 12.68], [76.47, 13.03]]]]}, "2021-11-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 13.03], [77.0, 13.25], [77.25, 13.15], [77.5, 13.25], [78.03, 13.03], [78.18, 12.68], [78.25, 12.65], [78.5, 12.75], [78.75, 12.65], [79.0, 12.75], [79.53, 12.53], [79.68, 12.18], [80.03, 12.03], [80.25, 11.5], [80.15, 11.25], [80.25, 11.0], [80.15, 10.75], [80.25, 10.5], [80.15, 10.25], [80.25, 10.0], [80.03, 9.47], [79.5, 9.25], [79.25, 9.35], [79.0, 9.25], [78.47, 9.47], [78.32, 9.82], [78.25, 9.85], [78.0, 9.75], [77.47, 9.97], [77.25, 10.5], [77.35, 10.75], [77.32, 10.82], [76.97, 10.97], [76.82, 11.32], [76.75, 11.35], [76.5, 11.25], [75.97, 11.47], [75.75, 12.0], [75.97, 12.53], [76.32, 12.68], [76.47, 13.03]]]]}, "2021-11-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 13.03], [77.0, 13.25], [77.25, 13.15], [77.5, 13.25], [78.03, 13.03], [78.18, 12.68], [78.25, 12.65], [78.5, 12.75], [78.75, 12.65], [79.0, 12.75], [79.53, 12.53], [79.68, 12.18], [80.03, 12.03], [80.25, 11.5], [80.03, 10.97], [79.5, 10.75], [79.25, 10.85], [79.0, 10.75], [78.75, 10.85], [78.5, 10.75], [78.25, 10.85], [78.0, 10.75], [77.75, 10.85], [77.5, 10.75], [76.97, 10.97], [76.82, 11.32], [76.75, 11.35], [76.5, 11.25], [75.97, 11.47], [75.75, 12.0], [75.97, 12.53], [76.32, 12.68], [76.47, 13.03]]]]}, "2021-11-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 13.03], [77.0, 13.25], [77.25, 13.15], [77.5, 13.25], [78.03, 13.03], [78.18, 12.68], [78.25, 12.65], [78.5, 12.75], [78.75, 12.65], [79.0, 12.75], [79.53, 12.53], [79.75, 12.0], [79.53, 11.47], [79.18, 11.32], [79.03, 10.97], [78.5, 10.75], [78.25, 10.85], [78.0, 10.75], [77.47, 10.97], [77.32, 11.32], [77.25, 11.35], [77.0, 11.25], [76.75, 11.35], [76.5, 11.25], [75.97, 11.47], [75.75, 12.0], [75.97, 12.53], [76.32, 12.68], [76.47, 13.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3490649366121943}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1648000170681763}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.469354516511885, 23.288928889918395, 23.351586481691413, 22.12090313080779, 22.306739739907584]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.537891441523982, 21.321904717073608, 20.932161770492087, 19.795142022582297, 20.665757655495327]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.056092524588923, -2.1886405331544836, -2.1683017295727782, -2.4922470590645696, -1.8851600240329844]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.120308783521409, -3.3490649366121943, -2.890467855522104, -3.1738984845395635, -2.4728695408411454]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.765329575189423, -1.8986295332563976, -1.9426381995157223, -2.330769086078404, -1.7176679516307736]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3566465418268208, -2.8008821733393914, -2.721260103042384, -3.3052807877624963, -2.119853199020322]}}