{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:52.768495", "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": "2017-Sep-24_to_2017-Sep-27_108.5_60.5"}, "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": 2017090000655}, "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": "September 24 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 27 2017"}, "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": 156246.83871775173}, "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"]}, "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": 60.5}, "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": 108.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "108.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 103.75}, "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": 58.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 63.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 58.97], [112.75, 59.5], [112.97, 60.03], [113.5, 60.25], [114.03, 60.03], [114.25, 59.5], [114.03, 58.97], [113.5, 58.75], [112.97, 58.97]]], [[[104.0, 62.25], [104.25, 62.15], [104.32, 62.18], [104.35, 62.25], [104.25, 62.5], [104.47, 63.03], [105.0, 63.25], [105.25, 63.15], [105.5, 63.25], [105.75, 63.15], [106.0, 63.25], [106.25, 63.15], [106.5, 63.25], [106.75, 63.15], [107.0, 63.25], [107.25, 63.15], [107.5, 63.25], [107.75, 63.15], [108.0, 63.25], [108.25, 63.15], [108.5, 63.25], [108.75, 63.15], [109.0, 63.25], [109.25, 63.15], [109.5, 63.25], [109.75, 63.15], [110.0, 63.25], [110.25, 63.15], [110.5, 63.25], [110.75, 63.15], [111.0, 63.25], [111.25, 63.15], [111.32, 63.18], [111.47, 63.53], [112.0, 63.75], [112.53, 63.53], [112.75, 63.0], [112.65, 62.75], [112.75, 62.5], [112.53, 61.97], [112.18, 61.82], [112.03, 61.47], [111.5, 61.25], [111.25, 61.35], [111.18, 61.32], [111.15, 61.25], [111.25, 61.0], [111.03, 60.47], [110.68, 60.32], [110.53, 59.97], [110.0, 59.75], [109.75, 59.85], [109.5, 59.75], [109.25, 59.85], [109.0, 59.75], [108.75, 59.85], [108.5, 59.75], [108.25, 59.85], [108.0, 59.75], [107.75, 59.85], [107.5, 59.75], [107.25, 59.85], [107.0, 59.75], [106.75, 59.85], [106.5, 59.75], [106.25, 59.85], [106.0, 59.75], [105.47, 59.97], [105.32, 60.32], [105.25, 60.35], [105.0, 60.25], [104.75, 60.35], [104.5, 60.25], [104.25, 60.35], [104.0, 60.25], [103.47, 60.47], [103.25, 61.0], [103.35, 61.25], [103.25, 61.5], [103.47, 62.03], [104.0, 62.25]]]]}, "2017-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.47, 62.03], [104.0, 62.25], [104.25, 62.15], [104.32, 62.18], [104.35, 62.25], [104.25, 62.5], [104.47, 63.03], [105.0, 63.25], [105.25, 63.15], [105.5, 63.25], [105.75, 63.15], [106.0, 63.25], [106.25, 63.15], [106.5, 63.25], [106.75, 63.15], [107.0, 63.25], [107.25, 63.15], [107.5, 63.25], [107.75, 63.15], [108.0, 63.25], [108.25, 63.15], [108.5, 63.25], [108.75, 63.15], [109.0, 63.25], [109.25, 63.15], [109.5, 63.25], [109.75, 63.15], [110.0, 63.25], [110.25, 63.15], [110.5, 63.25], [110.75, 63.15], [111.0, 63.25], [111.25, 63.15], [111.32, 63.18], [111.47, 63.53], [112.0, 63.75], [112.53, 63.53], [112.75, 63.0], [112.65, 62.75], [112.75, 62.5], [112.53, 61.97], [112.18, 61.82], [112.03, 61.47], [111.5, 61.25], [111.25, 61.35], [111.18, 61.32], [111.15, 61.25], [111.25, 61.0], [111.15, 60.75], [111.18, 60.68], [111.25, 60.65], [111.5, 60.75], [111.75, 60.65], [112.0, 60.75], [112.25, 60.65], [112.5, 60.75], [112.75, 60.65], [112.82, 60.68], [112.97, 61.03], [113.5, 61.25], [113.75, 61.15], [114.0, 61.25], [114.53, 61.03], [114.75, 60.5], [114.65, 60.25], [114.75, 60.0], [114.53, 59.47], [114.18, 59.32], [114.03, 58.97], [113.5, 58.75], [113.25, 58.85], [113.18, 58.82], [113.03, 58.47], [112.5, 58.25], [112.25, 58.35], [112.18, 58.32], [112.03, 57.97], [111.5, 57.75], [110.97, 57.97], [110.82, 58.32], [110.5, 58.46], [110.0, 58.25], [109.75, 58.35], [109.5, 58.25], [109.0, 58.46], [108.5, 58.25], [107.97, 58.47], [107.82, 58.82], [107.47, 58.97], [107.32, 59.32], [106.97, 59.47], [106.82, 59.82], [106.75, 59.85], [106.5, 59.75], [106.25, 59.85], [106.0, 59.75], [105.47, 59.97], [105.32, 60.32], [105.25, 60.35], [105.0, 60.25], [104.75, 60.35], [104.5, 60.25], [104.25, 60.35], [104.0, 60.25], [103.47, 60.47], [103.25, 61.0], [103.35, 61.25], [103.25, 61.5], [103.47, 62.03]]]]}, "2017-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.47, 62.03], [104.0, 62.25], [104.25, 62.15], [104.32, 62.18], [104.35, 62.25], [104.25, 62.5], [104.47, 63.03], [105.0, 63.25], [105.25, 63.15], [105.5, 63.25], [105.75, 63.15], [106.0, 63.25], [106.25, 63.15], [106.5, 63.25], [106.75, 63.15], [107.0, 63.25], [107.25, 63.15], [107.5, 63.25], [107.75, 63.15], [108.0, 63.25], [108.25, 63.15], [108.5, 63.25], [108.75, 63.15], [109.0, 63.25], [109.25, 63.15], [109.5, 63.25], [109.75, 63.15], [110.0, 63.25], [110.25, 63.15], [110.5, 63.25], [110.75, 63.15], [111.0, 63.25], [111.25, 63.15], [111.32, 63.18], [111.47, 63.53], [112.0, 63.75], [112.53, 63.53], [112.75, 63.0], [112.65, 62.75], [112.75, 62.5], [112.53, 61.97], [112.18, 61.82], [112.03, 61.47], [111.5, 61.25], [111.25, 61.35], [111.18, 61.32], [111.15, 61.25], [111.25, 61.0], [111.15, 60.75], [111.18, 60.68], [111.25, 60.65], [111.5, 60.75], [111.75, 60.65], [112.0, 60.75], [112.25, 60.65], [112.5, 60.75], [112.75, 60.65], [112.82, 60.68], [112.97, 61.03], [113.5, 61.25], [113.75, 61.15], [114.0, 61.25], [114.53, 61.03], [114.75, 60.5], [114.65, 60.25], [114.75, 60.0], [114.53, 59.47], [114.18, 59.32], [114.03, 58.97], [113.5, 58.75], [113.25, 58.85], [113.18, 58.82], [113.03, 58.47], [112.5, 58.25], [112.25, 58.35], [112.18, 58.32], [112.03, 57.97], [111.5, 57.75], [110.97, 57.97], [110.82, 58.32], [110.5, 58.46], [110.0, 58.25], [109.75, 58.35], [109.5, 58.25], [109.0, 58.46], [108.5, 58.25], [107.97, 58.47], [107.82, 58.82], [107.47, 58.97], [107.32, 59.32], [106.97, 59.47], [106.82, 59.82], [106.75, 59.85], [106.5, 59.75], [106.25, 59.85], [106.0, 59.75], [105.47, 59.97], [105.32, 60.32], [105.25, 60.35], [105.0, 60.25], [104.75, 60.35], [104.5, 60.25], [104.25, 60.35], [104.0, 60.25], [103.47, 60.47], [103.25, 61.0], [103.35, 61.25], [103.25, 61.5], [103.47, 62.03]]]]}, "2017-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.97, 60.53], [107.5, 60.75], [107.75, 60.65], [107.82, 60.68], [107.97, 61.03], [108.5, 61.25], [108.75, 61.15], [109.0, 61.25], [109.25, 61.15], [109.5, 61.25], [109.75, 61.15], [110.0, 61.25], [110.25, 61.15], [110.5, 61.25], [111.03, 61.03], [111.18, 60.68], [111.25, 60.65], [111.5, 60.75], [111.75, 60.65], [112.0, 60.75], [112.25, 60.65], [112.5, 60.75], [112.75, 60.65], [112.82, 60.68], [112.97, 61.03], [113.5, 61.25], [113.75, 61.15], [114.0, 61.25], [114.53, 61.03], [114.75, 60.5], [114.65, 60.25], [114.75, 60.0], [114.53, 59.47], [114.0, 59.25], [113.75, 59.35], [113.68, 59.32], [113.53, 58.97], [113.18, 58.82], [113.03, 58.47], [112.5, 58.25], [112.25, 58.35], [112.18, 58.32], [112.03, 57.97], [111.5, 57.75], [110.97, 57.97], [110.82, 58.32], [110.5, 58.46], [110.0, 58.25], [109.75, 58.35], [109.5, 58.25], [109.0, 58.46], [108.5, 58.25], [107.97, 58.47], [107.82, 58.82], [107.47, 58.97], [107.32, 59.32], [106.97, 59.47], [106.75, 60.0], [106.97, 60.53]]], [[[111.47, 62.47], [111.25, 63.0], [111.47, 63.53], [112.0, 63.75], [112.53, 63.53], [112.75, 63.0], [112.53, 62.47], [112.0, 62.25], [111.47, 62.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.197614721214734}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.0963462077736015}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-1.974726120698051, -3.040677662296673, -2.6121344801420605, -1.503747125543896]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.1236420993753313, -4.764830637611851, -3.799900202192191, -2.287960707228251]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.823848214502043, -5.811090055201861, -4.992441766648302, -3.9988478001384227]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.464282039040995, -7.197614721214734, -5.870066597070036, -4.253122748874375]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5474077911033037, -1.91919533716486, -1.5962477724216002, -1.2924688868973848]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7613288671582255, -2.306253049576123, -1.8252473946901862, -1.347585530438385]}}