{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:28.183526", "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": "2010-Apr-23_to_2010-Apr-25_112.0_65.0"}, "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": 2010040000681}, "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 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 73976.17165522359}, "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": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "Russian-Arctic"]}, "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": 65.0}, "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": 112.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "112.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 107.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 114.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 66.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.25, 64.0], [107.47, 64.53], [108.0, 64.75], [108.25, 64.65], [108.32, 64.68], [108.35, 64.75], [108.25, 65.0], [108.47, 65.53], [109.0, 65.75], [109.25, 65.65], [109.5, 65.75], [109.75, 65.65], [110.0, 65.75], [110.25, 65.65], [110.32, 65.68], [110.47, 66.03], [111.0, 66.25], [111.25, 66.15], [111.32, 66.18], [111.47, 66.53], [111.82, 66.68], [111.97, 67.03], [112.5, 67.25], [112.75, 67.15], [113.0, 67.25], [113.25, 67.15], [113.5, 67.25], [113.75, 67.15], [114.0, 67.25], [114.53, 67.03], [114.75, 66.5], [114.65, 66.25], [114.75, 66.0], [114.53, 65.47], [114.18, 65.32], [114.15, 65.25], [114.25, 65.0], [114.15, 64.75], [114.25, 64.5], [114.15, 64.25], [114.25, 64.0], [114.03, 63.47], [113.5, 63.25], [113.25, 63.35], [113.0, 63.25], [112.75, 63.35], [112.5, 63.25], [112.25, 63.35], [112.18, 63.32], [112.03, 62.97], [111.5, 62.75], [111.25, 62.85], [111.0, 62.75], [110.75, 62.85], [110.5, 62.75], [110.25, 62.85], [110.0, 62.75], [109.75, 62.85], [109.5, 62.75], [109.25, 62.85], [109.0, 62.75], [108.75, 62.85], [108.5, 62.75], [108.25, 62.85], [108.18, 62.82], [108.03, 62.47], [107.5, 62.25], [106.97, 62.47], [106.75, 63.0], [106.97, 63.53], [107.32, 63.68], [107.35, 63.75], [107.25, 64.0]]]]}, "2010-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.25, 64.0], [107.47, 64.53], [108.0, 64.75], [108.25, 64.65], [108.32, 64.68], [108.35, 64.75], [108.25, 65.0], [108.47, 65.53], [109.0, 65.75], [109.25, 65.65], [109.5, 65.75], [109.75, 65.65], [110.0, 65.75], [110.25, 65.65], [110.32, 65.68], [110.47, 66.03], [111.0, 66.25], [111.25, 66.15], [111.32, 66.18], [111.47, 66.53], [111.82, 66.68], [111.97, 67.03], [112.5, 67.25], [112.75, 67.15], [113.0, 67.25], [113.25, 67.15], [113.5, 67.25], [113.75, 67.15], [114.0, 67.25], [114.53, 67.03], [114.75, 66.5], [114.65, 66.25], [114.75, 66.0], [114.53, 65.47], [114.18, 65.32], [114.15, 65.25], [114.25, 65.0], [114.15, 64.75], [114.25, 64.5], [114.15, 64.25], [114.25, 64.0], [114.03, 63.47], [113.5, 63.25], [113.25, 63.35], [113.0, 63.25], [112.75, 63.35], [112.5, 63.25], [112.25, 63.35], [112.18, 63.32], [112.03, 62.97], [111.5, 62.75], [111.25, 62.85], [111.0, 62.75], [110.75, 62.85], [110.5, 62.75], [110.25, 62.85], [110.0, 62.75], [109.75, 62.85], [109.5, 62.75], [109.25, 62.85], [109.0, 62.75], [108.75, 62.85], [108.5, 62.75], [108.25, 62.85], [108.18, 62.82], [108.03, 62.47], [107.5, 62.25], [106.97, 62.47], [106.75, 63.0], [106.97, 63.53], [107.32, 63.68], [107.35, 63.75], [107.25, 64.0]]]]}, "2010-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.25, 64.0], [107.47, 64.53], [108.0, 64.75], [108.25, 64.65], [108.32, 64.68], [108.35, 64.75], [108.25, 65.0], [108.47, 65.53], [109.0, 65.75], [109.25, 65.65], [109.5, 65.75], [109.75, 65.65], [110.0, 65.75], [110.25, 65.65], [110.32, 65.68], [110.47, 66.03], [111.0, 66.25], [111.25, 66.15], [111.32, 66.18], [111.47, 66.53], [111.82, 66.68], [111.97, 67.03], [112.5, 67.25], [112.75, 67.15], [113.0, 67.25], [113.25, 67.15], [113.5, 67.25], [113.75, 67.15], [114.0, 67.25], [114.53, 67.03], [114.75, 66.5], [114.65, 66.25], [114.75, 66.0], [114.53, 65.47], [114.18, 65.32], [114.15, 65.25], [114.25, 65.0], [114.15, 64.75], [114.25, 64.5], [114.15, 64.25], [114.25, 64.0], [114.03, 63.47], [113.5, 63.25], [113.25, 63.35], [113.0, 63.25], [112.75, 63.35], [112.5, 63.25], [112.25, 63.35], [112.18, 63.32], [112.03, 62.97], [111.5, 62.75], [111.25, 62.85], [111.0, 62.75], [110.75, 62.85], [110.5, 62.75], [110.25, 62.85], [110.0, 62.75], [109.75, 62.85], [109.5, 62.75], [109.25, 62.85], [109.0, 62.75], [108.75, 62.85], [108.5, 62.75], [108.25, 62.85], [108.18, 62.82], [108.03, 62.47], [107.5, 62.25], [106.97, 62.47], [106.75, 63.0], [106.97, 63.53], [107.32, 63.68], [107.35, 63.75], [107.25, 64.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.091661940795007}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.527573124109022}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-11.164021582578016, -13.825162988698537, -11.098082261981574]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-14.829390640262261, -15.934874547357822, -13.65571667849889]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.630231501300683, -10.33734048989928, -7.615147381127099]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.782244345591607, -11.091661940795007, -9.131044118175168]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5632236502623005, -2.070130432875014, -1.5357688109378118]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8948715606213613, -2.280187806527939, -1.8040437027989145]}}