{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:31.486134", "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": "2024-Feb-24_to_2024-Feb-27_75.5_46.5"}, "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": 2024020000577}, "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": "February 24 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 27 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 54807.323571620684}, "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": ["Kazakhstan"]}, "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": 46.5}, "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": 75.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "75.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 73.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 78.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[75.25, 45.85], [75.0, 45.75], [74.75, 45.85], [74.68, 45.82], [74.53, 45.47], [74.18, 45.32], [74.03, 44.97], [73.5, 44.75], [72.97, 44.97], [72.75, 45.5], [72.85, 45.75], [72.75, 46.0], [72.85, 46.25], [72.75, 46.5], [72.97, 47.03], [73.32, 47.18], [73.47, 47.53], [73.82, 47.68], [73.97, 48.03], [74.5, 48.25], [75.0, 48.04], [75.32, 48.18], [75.47, 48.53], [76.0, 48.75], [76.25, 48.65], [76.5, 48.75], [77.0, 48.54], [77.5, 48.75], [77.75, 48.65], [78.0, 48.75], [78.53, 48.53], [78.75, 48.0], [78.53, 47.47], [78.13, 47.3], [78.25, 47.0], [78.03, 46.47], [77.5, 46.25], [77.25, 46.35], [77.0, 46.25], [76.75, 46.35], [76.68, 46.32], [76.53, 45.97], [76.0, 45.75], [75.75, 45.85], [75.5, 45.75], [75.25, 45.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Siberia", "W.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 47.53], [73.82, 47.68], [73.97, 48.03], [74.5, 48.25], [75.0, 48.04], [75.32, 48.18], [75.47, 48.53], [76.0, 48.75], [76.25, 48.65], [76.5, 48.75], [77.0, 48.54], [77.5, 48.75], [77.75, 48.65], [78.0, 48.75], [78.53, 48.53], [78.75, 48.0], [78.53, 47.47], [78.13, 47.3], [78.25, 47.0], [78.03, 46.47], [77.5, 46.25], [77.25, 46.35], [77.0, 46.25], [76.75, 46.35], [76.68, 46.32], [76.53, 45.97], [76.0, 45.75], [75.75, 45.85], [75.5, 45.75], [74.97, 45.97], [74.82, 46.32], [74.75, 46.35], [74.68, 46.32], [74.53, 45.97], [74.0, 45.75], [73.75, 45.85], [73.5, 45.75], [72.97, 45.97], [72.75, 46.5], [72.97, 47.03], [73.32, 47.18], [73.47, 47.53]]]]}, "2024-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.75, 46.0], [72.85, 46.25], [72.75, 46.5], [72.97, 47.03], [73.32, 47.18], [73.47, 47.53], [73.82, 47.68], [73.97, 48.03], [74.5, 48.25], [75.0, 48.04], [75.32, 48.18], [75.47, 48.53], [76.0, 48.75], [76.25, 48.65], [76.5, 48.75], [77.0, 48.54], [77.5, 48.75], [77.75, 48.65], [78.0, 48.75], [78.53, 48.53], [78.75, 48.0], [78.53, 47.47], [78.13, 47.3], [78.25, 47.0], [78.03, 46.47], [77.5, 46.25], [77.25, 46.35], [77.0, 46.25], [76.75, 46.35], [76.68, 46.32], [76.53, 45.97], [76.0, 45.75], [75.75, 45.85], [75.5, 45.75], [75.25, 45.85], [75.0, 45.75], [74.75, 45.85], [74.68, 45.82], [74.53, 45.47], [74.18, 45.32], [74.03, 44.97], [73.5, 44.75], [72.97, 44.97], [72.75, 45.5], [72.85, 45.75], [72.75, 46.0]]]]}, "2024-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.75, 46.0], [72.85, 46.25], [72.75, 46.5], [72.97, 47.03], [73.32, 47.18], [73.47, 47.53], [73.82, 47.68], [73.97, 48.03], [74.5, 48.25], [75.0, 48.04], [75.32, 48.18], [75.47, 48.53], [76.0, 48.75], [76.25, 48.65], [76.5, 48.75], [77.0, 48.54], [77.5, 48.75], [77.75, 48.65], [78.0, 48.75], [78.53, 48.53], [78.75, 48.0], [78.53, 47.47], [78.13, 47.3], [78.25, 47.0], [78.03, 46.47], [77.5, 46.25], [77.25, 46.35], [77.0, 46.25], [76.75, 46.35], [76.68, 46.32], [76.53, 45.97], [76.0, 45.75], [75.75, 45.85], [75.5, 45.75], 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"Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-18.62871388840145, -18.51586826191655, -17.65409470861937, -13.883171754070759]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-20.363203843585524, -21.565819673346738, -19.884971057415527, -14.895966565017773]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.841693028499956, -9.391758143517311, -8.731391905112254, -7.146544920280367]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.446208388569687, -11.028168600302479, -10.325992919794999, -7.6140201844372655]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5166193055001793, -1.6417464732898852, -1.5441915719413548, -1.3757539966263612]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6109550801999168, -1.868200671560599, -1.8227703099623416, -1.50329537660563]}}