{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:36.384979", "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": "2022-Dec-31_to_2023-Jan-06_74.5_34.0"}, "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": 2022120001352}, "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": "December 31 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 59050.9411630502}, "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", "Pakistan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "W.C.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": 34.0}, "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": 74.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "74.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 73.75}, "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": 31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 33.47], [73.25, 34.0], [73.47, 34.53], [74.0, 34.75], [74.25, 34.65], [74.5, 34.75], [75.03, 34.53], [75.25, 34.0], [75.03, 33.47], [74.5, 33.25], [74.25, 33.35], [74.0, 33.25], [73.47, 33.47]]]]}, "2023-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.0, 35.25], [74.25, 35.15], [74.5, 35.25], [75.03, 35.03], [75.18, 34.68], [75.53, 34.53], [75.75, 34.0], [75.53, 33.47], [75.0, 33.25], [74.75, 33.35], [74.5, 33.25], [74.25, 33.35], [74.0, 33.25], [73.47, 33.47], [73.25, 34.0], [73.35, 34.25], [73.25, 34.5], [73.47, 35.03], [74.0, 35.25]]], [[[75.97, 33.97], [75.75, 34.5], [75.97, 35.03], [76.5, 35.25], [77.03, 35.03], [77.25, 34.5], [77.03, 33.97], [76.5, 33.75], [75.97, 33.97]]]]}, "2023-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 35.03], [74.0, 35.25], [74.25, 35.15], [74.5, 35.25], [74.8, 35.13], [74.97, 35.53], [75.5, 35.75], [75.75, 35.65], [76.0, 35.75], [76.25, 35.65], [76.5, 35.75], [77.03, 35.53], [77.25, 35.0], [77.15, 34.75], [77.25, 34.5], [77.03, 33.97], [76.5, 33.75], [76.25, 33.85], [76.0, 33.75], [76.53, 33.53], [76.75, 33.0], [76.53, 32.47], [76.0, 32.25], [75.47, 32.47], [75.25, 33.0], [75.43, 33.43], [75.0, 33.25], [74.75, 33.35], [74.5, 33.25], [74.25, 33.35], [74.0, 33.25], [73.47, 33.47], [73.25, 34.0], [73.35, 34.25], [73.25, 34.5], [73.47, 35.03]], [[75.7, 33.88], [75.57, 33.57], [76.0, 33.75], [75.7, 33.88]]]]}, "2023-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 35.03], [74.0, 35.25], [74.25, 35.15], [74.32, 35.18], [74.47, 35.53], [74.82, 35.68], [74.97, 36.03], [75.5, 36.25], [76.03, 36.03], [76.18, 35.68], [76.25, 35.65], [76.5, 35.75], [77.03, 35.53], [77.25, 35.0], [77.15, 34.75], [77.18, 34.68], [77.53, 34.53], [77.75, 34.0], [77.65, 33.75], [77.68, 33.68], [78.03, 33.53], [78.25, 33.0], [78.15, 32.75], [78.18, 32.68], [78.53, 32.53], [78.75, 32.0], [78.53, 31.47], [78.0, 31.25], [77.75, 31.35], [77.5, 31.25], [76.97, 31.47], [76.82, 31.82], [76.75, 31.85], [76.5, 31.75], [75.97, 31.97], [75.82, 32.32], [75.47, 32.47], [75.25, 33.0], [75.43, 33.43], [75.0, 33.25], [74.75, 33.35], [74.5, 33.25], [74.25, 33.35], [74.0, 33.25], [73.47, 33.47], [73.25, 34.0], [73.35, 34.25], [73.25, 34.5], [73.47, 35.03]], [[76.32, 33.82], [76.25, 33.85], [76.0, 33.75], [76.3, 33.63], [76.35, 33.75], [76.32, 33.82]], [[75.7, 33.88], [75.57, 33.57], [76.0, 33.75], [75.7, 33.88]]]]}, "2023-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 35.03], [74.0, 35.25], [74.25, 35.15], [74.32, 35.18], [74.47, 35.53], [74.82, 35.68], [74.97, 36.03], [75.5, 36.25], [76.03, 36.03], [76.18, 35.68], [76.25, 35.65], [76.5, 35.75], [77.03, 35.53], [77.25, 35.0], [77.13, 34.7], [77.53, 34.53], [77.75, 34.0], [77.65, 33.75], [77.68, 33.68], [78.03, 33.53], [78.25, 33.0], [78.15, 32.75], [78.18, 32.68], [78.53, 32.53], [78.75, 32.0], [78.53, 31.47], [78.0, 31.25], [77.75, 31.35], [77.5, 31.25], [76.97, 31.47], [76.82, 31.82], [76.75, 31.85], [76.5, 31.75], [75.97, 31.97], [75.82, 32.32], [75.47, 32.47], [75.25, 33.0], [75.43, 33.43], [75.0, 33.25], [74.75, 33.35], [74.5, 33.25], [74.25, 33.35], [74.0, 33.25], [73.47, 33.47], [73.25, 34.0], [73.35, 34.25], [73.25, 34.5], [73.47, 35.03]], [[76.3, 33.88], [76.0, 33.75], [76.3, 33.63], [76.35, 33.75], [76.3, 33.88]], [[75.7, 33.88], [75.57, 33.57], [76.0, 33.75], [75.7, 33.88]]]]}, "2023-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.25, 34.5], [73.47, 35.03], [74.0, 35.25], [74.25, 35.15], [74.32, 35.18], [74.47, 35.53], [74.82, 35.68], [74.97, 36.03], [75.5, 36.25], [76.03, 36.03], [76.18, 35.68], [76.25, 35.65], [76.5, 35.75], [77.03, 35.53], [77.25, 35.0], [77.13, 34.7], [77.53, 34.53], [77.75, 34.0], [77.65, 33.75], [77.68, 33.68], [78.03, 33.53], [78.25, 33.0], [78.15, 32.75], [78.18, 32.68], [78.53, 32.53], [78.75, 32.0], [78.53, 31.47], [78.0, 31.25], [77.75, 31.35], [77.5, 31.25], [76.97, 31.47], [76.82, 31.82], [76.75, 31.85], [76.5, 31.75], [75.97, 31.97], [75.82, 32.32], [75.47, 32.47], [75.25, 33.0], [75.47, 33.53], [76.0, 33.75], [75.5, 33.96], [75.18, 33.82], [75.03, 33.47], [74.5, 33.25], [73.97, 33.47], [73.82, 33.82], [73.47, 33.97], [73.25, 34.5]], [[76.3, 33.63], [76.35, 33.75], [76.3, 33.88], [76.0, 33.75], [76.3, 33.63]]]]}, "2023-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[77.0, 33.25], [77.53, 33.03], [77.75, 32.5], [77.53, 31.97], [77.0, 31.75], [76.47, 31.97], [76.25, 32.5], [76.47, 33.03], [77.0, 33.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.446152039977278}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.897187479514791}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.484725788429898, -11.892964300806284, -17.47813780160419, -21.710866351489898, -21.558161893269016, -23.032920774908717, -25.407279246286777]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.42198551475559, -23.804472943344848, -29.429276180588914, -30.609304329296265, -31.21394031975919, -32.05195215062895, -25.407279246286777]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.529502985998533, -5.135190147921382, -5.603069860802151, -6.029811824746306, -5.9526137627525255, -6.208048608580566, -5.95287350907617]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.018102817583781, -5.5133469919475715, -6.959527664823213, -7.487473755322071, -7.582084432400592, -8.446152039977278, -5.95287350907617]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5326232586422117, -1.5815727636713943, -1.5480848446443998, -1.6139813761905382, -1.5847998291300136, -1.5964776861939813, -1.5306491584030224]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.663889422808265, -1.8412570931775838, -1.9326966315781227, -2.1647424276758223, -1.9424920883980088, -2.0808736121930154, -1.5306491584030224]}}