{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:27.986238", "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-Apr-23_to_2022-Apr-26_86.5_47.5"}, "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": 2022040000767}, "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 23 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 26 2022"}, "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": 51625.87764470518}, "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": ["China"]}, "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": 47.5}, "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": 86.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "86.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 85.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 89.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[84.47, 46.53], [85.0, 46.75], [85.3, 46.63], [85.47, 47.03], [85.88, 47.2], [85.75, 47.5], [85.97, 48.03], [86.5, 48.25], [86.75, 48.15], [87.0, 48.25], [87.25, 48.15], [87.5, 48.25], [88.03, 48.03], [88.25, 47.5], [88.15, 47.25], [88.25, 47.0], [88.04, 46.5], [88.18, 46.18], [88.25, 46.15], [88.5, 46.25], [88.75, 46.15], [89.0, 46.25], [89.53, 46.03], [89.75, 45.5], [89.53, 44.97], [89.0, 44.75], [88.75, 44.85], [88.5, 44.75], [88.25, 44.85], [88.0, 44.75], [87.75, 44.85], [87.68, 44.82], [87.53, 44.47], [87.0, 44.25], [86.75, 44.35], [86.5, 44.25], [86.25, 44.35], [86.0, 44.25], [85.75, 44.35], [85.5, 44.25], [85.25, 44.35], [85.0, 44.25], [84.47, 44.47], [84.25, 45.0], [84.35, 45.25], [84.25, 45.5], [84.35, 45.75], [84.25, 46.0], [84.47, 46.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Siberia", "E.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.5, 46.75], [85.97, 46.97], [85.75, 47.5], [85.97, 48.03], [86.5, 48.25], [86.75, 48.15], [87.0, 48.25], [87.25, 48.15], [87.5, 48.25], [88.03, 48.03], [88.25, 47.5], [88.15, 47.25], [88.25, 47.0], [88.03, 46.47], [87.5, 46.25], [86.97, 46.47], [86.82, 46.82], [86.75, 46.85], [86.5, 46.75]]]]}, "2022-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.25, 45.5], [84.35, 45.75], [84.25, 46.0], [84.47, 46.53], [85.0, 46.75], [85.3, 46.63], [85.47, 47.03], [85.88, 47.2], [85.75, 47.5], [85.97, 48.03], [86.5, 48.25], [86.75, 48.15], [87.0, 48.25], [87.25, 48.15], [87.5, 48.25], [88.03, 48.03], [88.25, 47.5], [88.15, 47.25], [88.25, 47.0], [88.04, 46.5], [88.18, 46.18], [88.25, 46.15], [88.5, 46.25], [88.75, 46.15], [89.0, 46.25], [89.53, 46.03], [89.75, 45.5], [89.53, 44.97], [89.0, 44.75], [88.75, 44.85], [88.5, 44.75], [88.25, 44.85], [88.0, 44.75], [87.75, 44.85], [87.68, 44.82], [87.53, 44.47], [87.0, 44.25], [86.75, 44.35], [86.5, 44.25], [86.25, 44.35], [86.0, 44.25], [85.75, 44.35], [85.5, 44.25], [85.25, 44.35], [85.0, 44.25], [84.47, 44.47], [84.25, 45.0], [84.35, 45.25], [84.25, 45.5]]]]}, "2022-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.25, 45.5], [84.35, 45.75], [84.25, 46.0], [84.47, 46.53], [85.0, 46.75], [85.3, 46.63], [85.47, 47.03], [85.88, 47.2], [85.75, 47.5], [85.97, 48.03], [86.5, 48.25], [86.75, 48.15], [87.0, 48.25], [87.25, 48.15], [87.5, 48.25], [88.03, 48.03], [88.25, 47.5], [88.15, 47.25], [88.25, 47.0], [88.04, 46.5], [88.18, 46.18], [88.25, 46.15], [88.5, 46.25], [88.75, 46.15], [89.0, 46.25], [89.53, 46.03], [89.75, 45.5], [89.53, 44.97], [89.0, 44.75], [88.75, 44.85], [88.5, 44.75], [88.25, 44.85], [88.0, 44.75], [87.75, 44.85], [87.68, 44.82], [87.53, 44.47], [87.0, 44.25], [86.75, 44.35], [86.5, 44.25], [86.25, 44.35], [86.0, 44.25], [85.75, 44.35], [85.5, 44.25], [85.25, 44.35], [85.0, 44.25], [84.47, 44.47], [84.25, 45.0], [84.35, 45.25], [84.25, 45.5]]]]}, "2022-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.25, 45.5], [84.35, 45.75], [84.25, 46.0], [84.47, 46.53], [85.0, 46.75], [85.3, 46.63], [85.47, 47.03], [85.88, 47.2], [85.75, 47.5], [85.97, 48.03], [86.5, 48.25], [86.75, 48.15], [87.0, 48.25], [87.25, 48.15], [87.5, 48.25], [88.03, 48.03], [88.25, 47.5], [88.03, 46.97], [87.63, 46.8], [87.68, 46.68], [88.03, 46.53], [88.18, 46.18], [88.25, 46.15], [88.5, 46.25], [88.75, 46.15], [89.0, 46.25], [89.53, 46.03], [89.75, 45.5], [89.53, 44.97], [89.0, 44.75], [88.75, 44.85], [88.5, 44.75], [88.25, 44.85], [88.0, 44.75], [87.75, 44.85], [87.68, 44.82], [87.53, 44.47], [87.0, 44.25], [86.75, 44.35], [86.5, 44.25], [86.25, 44.35], [86.0, 44.25], [85.75, 44.35], [85.5, 44.25], [85.25, 44.35], [85.0, 44.25], [84.47, 44.47], [84.25, 45.0], [84.35, 45.25], [84.25, 45.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.439432098140003}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.281413879586986}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.056285502777371, 9.308986973757158, 9.618752554053856, 10.865293717099462]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.9765599206151023, 2.6444097477154855, 5.876151505495727, 6.118374600100822]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.276667458412646, -7.754727401437127, -7.636233493469132, -6.418100419896661]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.518774336111164, -10.439432098140003, -9.894485319081866, -7.144424181826423]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6212234870023394, -1.648727247498248, -1.6247478528183263, -1.344306982363877]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7227168066864587, -2.158827795907676, -2.04841706215772, -1.4590519782726001]}}