{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:22.282750", "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-Aug-28_to_2022-Sep-02_104.0_62.0"}, "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": 2022080001214}, "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": "August 28 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 02 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 173918.93032703068}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 62.0}, "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": 104.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "104.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 101.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 117.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[101.0, 63.75], [101.53, 63.53], [101.68, 63.18], [101.75, 63.15], [102.0, 63.25], [102.25, 63.15], [102.5, 63.25], [103.03, 63.03], [103.18, 62.68], [103.25, 62.65], [103.32, 62.68], [103.47, 63.03], [104.0, 63.25], [104.25, 63.15], [104.5, 63.25], [104.75, 63.15], [105.0, 63.25], [105.25, 63.15], [105.32, 63.18], [105.35, 63.25], [105.25, 63.5], [105.35, 63.75], [105.32, 63.82], [104.97, 63.97], [104.75, 64.5], [104.85, 64.75], [104.75, 65.0], [104.85, 65.25], [104.75, 65.5], [104.97, 66.03], [105.5, 66.25], [105.75, 66.15], [106.0, 66.25], [106.53, 66.03], [106.75, 65.5], [106.65, 65.25], [106.68, 65.18], [107.03, 65.03], [107.25, 64.5], [107.15, 64.25], [107.25, 64.0], [107.15, 63.75], [107.18, 63.68], [107.25, 63.65], [107.5, 63.75], [108.03, 63.53], [108.18, 63.18], [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], [110.32, 63.18], [110.47, 63.53], [111.0, 63.75], [111.25, 63.65], [111.5, 63.75], [111.75, 63.65], [111.82, 63.68], [111.97, 64.03], [112.5, 64.25], [113.03, 64.03], [113.18, 63.68], [113.25, 63.65], [113.5, 63.75], [114.03, 63.53], [114.18, 63.18], [114.53, 63.03], [114.68, 62.68], [115.03, 62.53], [115.18, 62.18], [115.53, 62.03], [115.68, 61.68], [115.75, 61.65], [116.0, 61.75], [116.25, 61.65], [116.5, 61.75], [117.03, 61.53], [117.18, 61.18], [117.53, 61.03], [117.75, 60.5], [117.53, 59.97], [117.0, 59.75], [116.75, 59.85], [116.5, 59.75], [116.25, 59.85], [116.0, 59.75], [115.75, 59.85], [115.5, 59.75], [115.25, 59.85], [115.0, 59.75], [114.75, 59.85], [114.5, 59.75], [114.25, 59.85], [114.0, 59.75], [113.75, 59.85], [113.5, 59.75], [113.25, 59.85], [113.0, 59.75], [112.75, 59.85], [112.5, 59.75], [112.25, 59.85], [112.0, 59.75], [111.75, 59.85], [111.5, 59.75], [111.25, 59.85], [111.0, 59.75], [110.47, 59.97], [110.32, 60.32], [110.25, 60.35], [110.0, 60.25], [109.75, 60.35], [109.5, 60.25], [108.97, 60.47], [108.82, 60.82], [108.75, 60.85], [108.5, 60.75], [107.97, 60.97], [107.82, 61.32], [107.47, 61.47], [107.32, 61.82], [107.07, 61.93], [107.25, 61.5], [107.03, 60.97], [106.5, 60.75], [106.25, 60.85], [106.0, 60.75], [105.75, 60.85], [105.5, 60.75], [105.25, 60.85], [105.0, 60.75], [104.75, 60.85], [104.68, 60.82], [104.53, 60.47], [104.0, 60.25], [103.47, 60.47], [103.32, 60.82], [103.25, 60.85], [103.0, 60.75], [102.75, 60.85], [102.5, 60.75], [101.97, 60.97], [101.82, 61.32], [101.47, 61.47], [101.32, 61.82], [100.97, 61.97], [100.82, 62.32], [100.47, 62.47], [100.25, 63.0], [100.47, 63.53], [101.0, 63.75]], [[106.82, 62.32], [106.75, 62.35], [106.68, 62.32], [106.65, 62.25], [106.68, 62.18], [106.93, 62.07], [106.82, 62.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic", "E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.47, 63.03], [104.0, 63.25], [104.25, 63.15], [104.5, 63.25], [104.75, 63.15], [105.0, 63.25], [105.25, 63.15], [105.32, 63.18], [105.35, 63.25], [105.25, 63.5], [105.35, 63.75], [105.32, 63.82], [104.97, 63.97], [104.75, 64.5], [104.85, 64.75], [104.75, 65.0], [104.85, 65.25], [104.75, 65.5], [104.97, 66.03], [105.5, 66.25], [105.75, 66.15], [106.0, 66.25], [106.53, 66.03], [106.75, 65.5], [106.65, 65.25], [106.68, 65.18], [107.03, 65.03], [107.25, 64.5], [107.15, 64.25], [107.25, 64.0], [107.15, 63.75], [107.25, 63.5], [107.15, 63.25], [107.25, 63.0], [107.03, 62.47], [106.68, 62.32], [106.65, 62.25], [106.75, 62.0], [106.53, 61.47], [106.0, 61.25], [105.75, 61.35], [105.5, 61.25], [105.25, 61.35], [105.0, 61.25], [104.75, 61.35], [104.5, 61.25], [104.25, 61.35], [104.0, 61.25], [103.5, 61.46], [103.0, 61.25], [102.47, 61.47], [102.25, 62.0], [102.47, 62.53], [103.0, 62.75], [103.3, 62.63], [103.47, 63.03]]]]}, "2022-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.47, 62.47], [100.25, 63.0], [100.47, 63.53], [101.0, 63.75], [101.53, 63.53], [101.68, 63.18], [101.75, 63.15], [102.0, 63.25], [102.25, 63.15], [102.5, 63.25], [103.03, 63.03], [103.18, 62.68], [103.25, 62.65], [103.32, 62.68], [103.47, 63.03], [104.0, 63.25], [104.25, 63.15], [104.5, 63.25], [104.75, 63.15], [105.0, 63.25], [105.25, 63.15], [105.32, 63.18], [105.35, 63.25], [105.25, 63.5], [105.35, 63.75], [105.32, 63.82], [104.97, 63.97], [104.75, 64.5], [104.85, 64.75], [104.75, 65.0], [104.85, 65.25], [104.75, 65.5], [104.97, 66.03], [105.5, 66.25], [105.75, 66.15], [106.0, 66.25], [106.53, 66.03], [106.75, 65.5], [106.65, 65.25], [106.68, 65.18], [107.03, 65.03], [107.25, 64.5], [107.15, 64.25], [107.25, 64.0], [107.15, 63.75], [107.25, 63.5], [107.15, 63.25], [107.25, 63.0], [107.03, 62.47], [106.68, 62.32], [106.65, 62.25], [106.75, 62.0], [106.65, 61.75], [106.75, 61.5], [106.53, 60.97], [106.0, 60.75], [105.75, 60.85], [105.5, 60.75], [105.25, 60.85], [105.0, 60.75], [104.75, 60.85], [104.68, 60.82], [104.53, 60.47], [104.0, 60.25], [103.47, 60.47], [103.32, 60.82], [103.25, 60.85], [103.0, 60.75], [102.75, 60.85], [102.5, 60.75], [101.97, 60.97], [101.82, 61.32], [101.47, 61.47], [101.32, 61.82], [100.97, 61.97], [100.82, 62.32], [100.47, 62.47]]]]}, "2022-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.47, 62.47], [100.25, 63.0], [100.47, 63.53], [101.0, 63.75], [101.53, 63.53], [101.68, 63.18], [101.75, 63.15], [102.0, 63.25], [102.25, 63.15], [102.5, 63.25], [103.03, 63.03], [103.18, 62.68], [103.25, 62.65], [103.32, 62.68], [103.47, 63.03], [104.0, 63.25], [104.25, 63.15], [104.5, 63.25], [104.75, 63.15], [105.0, 63.25], [105.25, 63.15], [105.32, 63.18], [105.35, 63.25], [105.25, 63.5], [105.35, 63.75], [105.32, 63.82], [104.97, 63.97], [104.75, 64.5], [104.85, 64.75], [104.75, 65.0], [104.85, 65.25], [104.75, 65.5], [104.97, 66.03], [105.5, 66.25], [105.75, 66.15], [106.0, 66.25], [106.53, 66.03], [106.75, 65.5], [106.65, 65.25], [106.68, 65.18], [107.03, 65.03], [107.25, 64.5], [107.15, 64.25], [107.25, 64.0], [107.15, 63.75], [107.18, 63.68], [107.25, 63.65], [107.5, 63.75], [108.03, 63.53], [108.18, 63.18], [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], [110.32, 63.18], [110.47, 63.53], [111.0, 63.75], [111.25, 63.65], [111.5, 63.75], [111.75, 63.65], [111.82, 63.68], [111.97, 64.03], [112.5, 64.25], [113.03, 64.03], [113.18, 63.68], [113.25, 63.65], [113.5, 63.75], [114.03, 63.53], [114.18, 63.18], [114.53, 63.03], [114.68, 62.68], [115.03, 62.53], [115.18, 62.18], [115.53, 62.03], [115.68, 61.68], [115.75, 61.65], [116.0, 61.75], [116.25, 61.65], [116.5, 61.75], [117.03, 61.53], [117.18, 61.18], [117.53, 61.03], [117.75, 60.5], [117.53, 59.97], [117.0, 59.75], [116.75, 59.85], [116.5, 59.75], [116.25, 59.85], [116.0, 59.75], [115.75, 59.85], [115.5, 59.75], [115.25, 59.85], [115.0, 59.75], [114.75, 59.85], [114.5, 59.75], [114.25, 59.85], [114.0, 59.75], [113.75, 59.85], [113.5, 59.75], [113.25, 59.85], [113.0, 59.75], [112.75, 59.85], [112.5, 59.75], [112.25, 59.85], [112.0, 59.75], [111.75, 59.85], [111.5, 59.75], [111.25, 59.85], [111.0, 59.75], [110.47, 59.97], [110.32, 60.32], [110.25, 60.35], [110.0, 60.25], [109.75, 60.35], [109.5, 60.25], [108.97, 60.47], [108.82, 60.82], [108.75, 60.85], [108.5, 60.75], [107.97, 60.97], [107.82, 61.32], [107.47, 61.47], [107.32, 61.82], [107.07, 61.93], [107.25, 61.5], [107.03, 60.97], [106.5, 60.75], [106.25, 60.85], [106.0, 60.75], [105.75, 60.85], [105.5, 60.75], [105.25, 60.85], [105.0, 60.75], [104.75, 60.85], [104.68, 60.82], [104.53, 60.47], [104.0, 60.25], [103.47, 60.47], [103.32, 60.82], [103.25, 60.85], [103.0, 60.75], [102.75, 60.85], [102.5, 60.75], [101.97, 60.97], [101.82, 61.32], [101.47, 61.47], [101.32, 61.82], [100.97, 61.97], [100.82, 62.32], [100.47, 62.47]], [[106.75, 62.35], [106.68, 62.32], [106.65, 62.25], [106.68, 62.18], [106.93, 62.07], [106.82, 62.32], [106.75, 62.35]]]]}, "2022-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.47, 62.47], [100.25, 63.0], [100.47, 63.53], [101.0, 63.75], [101.53, 63.53], [101.68, 63.18], [101.75, 63.15], [102.0, 63.25], [102.25, 63.15], [102.5, 63.25], [103.03, 63.03], [103.18, 62.68], [103.25, 62.65], [103.5, 62.75], [103.75, 62.65], [103.82, 62.68], [103.97, 63.03], [104.5, 63.25], [104.75, 63.15], [105.0, 63.25], [105.53, 63.03], [105.68, 62.68], [105.75, 62.65], [106.0, 62.75], [106.43, 62.57], [106.25, 63.0], [106.47, 63.53], [107.0, 63.75], [107.25, 63.65], [107.5, 63.75], [108.03, 63.53], [108.18, 63.18], [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], [110.32, 63.18], [110.47, 63.53], [111.0, 63.75], [111.25, 63.65], [111.5, 63.75], [111.75, 63.65], [111.82, 63.68], [111.97, 64.03], [112.5, 64.25], [113.03, 64.03], [113.18, 63.68], [113.25, 63.65], [113.5, 63.75], [114.03, 63.53], [114.18, 63.18], [114.53, 63.03], [114.68, 62.68], [115.03, 62.53], [115.18, 62.18], [115.53, 62.03], [115.68, 61.68], [115.75, 61.65], [116.0, 61.75], [116.25, 61.65], [116.5, 61.75], [117.03, 61.53], [117.18, 61.18], [117.53, 61.03], [117.75, 60.5], [117.53, 59.97], [117.0, 59.75], [116.75, 59.85], [116.5, 59.75], [116.25, 59.85], [116.0, 59.75], [115.75, 59.85], [115.5, 59.75], [115.25, 59.85], [115.0, 59.75], [114.75, 59.85], [114.5, 59.75], [114.25, 59.85], [114.0, 59.75], [113.75, 59.85], [113.5, 59.75], [113.25, 59.85], [113.0, 59.75], [112.75, 59.85], [112.5, 59.75], [112.25, 59.85], [112.0, 59.75], [111.75, 59.85], [111.5, 59.75], [111.25, 59.85], [111.0, 59.75], [110.47, 59.97], [110.32, 60.32], [110.25, 60.35], [110.0, 60.25], [109.75, 60.35], [109.5, 60.25], [108.97, 60.47], [108.82, 60.82], [108.75, 60.85], [108.5, 60.75], [107.97, 60.97], [107.82, 61.32], [107.47, 61.47], [107.32, 61.82], [107.07, 61.93], [107.25, 61.5], [107.03, 60.97], [106.5, 60.75], [106.25, 60.85], [106.0, 60.75], [105.75, 60.85], [105.5, 60.75], [105.25, 60.85], [105.0, 60.75], [104.75, 60.85], [104.68, 60.82], [104.53, 60.47], [104.0, 60.25], [103.47, 60.47], [103.32, 60.82], [103.25, 60.85], [103.0, 60.75], [102.75, 60.85], [102.5, 60.75], [101.97, 60.97], [101.82, 61.32], [101.47, 61.47], [101.32, 61.82], [100.97, 61.97], [100.82, 62.32], [100.47, 62.47]], [[106.57, 62.43], [106.68, 62.18], [106.93, 62.07], [106.82, 62.32], [106.57, 62.43]]]]}, "2022-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 61.97], [101.75, 62.5], [101.97, 63.03], [102.5, 63.25], [103.03, 63.03], [103.18, 62.68], [103.25, 62.65], [103.5, 62.75], [103.75, 62.65], [103.82, 62.68], [103.97, 63.03], [104.5, 63.25], [104.75, 63.15], [105.0, 63.25], [105.53, 63.03], [105.68, 62.68], [105.75, 62.65], [106.0, 62.75], [106.43, 62.57], [106.25, 63.0], [106.47, 63.53], [107.0, 63.75], [107.25, 63.65], [107.5, 63.75], [108.03, 63.53], [108.18, 63.18], [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], [110.32, 63.18], [110.47, 63.53], [111.0, 63.75], [111.25, 63.65], [111.5, 63.75], [111.75, 63.65], [111.82, 63.68], [111.97, 64.03], [112.5, 64.25], [113.03, 64.03], [113.18, 63.68], [113.25, 63.65], [113.5, 63.75], [114.03, 63.53], [114.18, 63.18], [114.53, 63.03], [114.68, 62.68], [115.03, 62.53], [115.18, 62.18], [115.53, 62.03], [115.68, 61.68], [115.75, 61.65], [116.0, 61.75], [116.25, 61.65], [116.5, 61.75], [117.03, 61.53], [117.18, 61.18], [117.53, 61.03], [117.75, 60.5], [117.53, 59.97], [117.0, 59.75], [116.75, 59.85], [116.5, 59.75], [116.25, 59.85], [116.0, 59.75], [115.75, 59.85], [115.5, 59.75], [115.25, 59.85], [115.0, 59.75], [114.75, 59.85], [114.5, 59.75], [114.25, 59.85], [114.0, 59.75], [113.75, 59.85], [113.5, 59.75], [113.25, 59.85], [113.0, 59.75], [112.75, 59.85], [112.5, 59.75], [112.25, 59.85], [112.0, 59.75], [111.75, 59.85], [111.5, 59.75], [111.25, 59.85], [111.0, 59.75], [110.47, 59.97], [110.32, 60.32], [110.25, 60.35], [110.0, 60.25], [109.75, 60.35], [109.5, 60.25], [108.97, 60.47], [108.82, 60.82], [108.75, 60.85], [108.5, 60.75], [107.97, 60.97], [107.82, 61.32], [107.47, 61.47], [107.32, 61.82], [107.07, 61.93], [107.25, 61.5], [107.03, 60.97], [106.5, 60.75], [106.25, 60.85], [106.0, 60.75], [105.75, 60.85], [105.5, 60.75], [105.25, 60.85], [105.0, 60.75], [104.75, 60.85], [104.68, 60.82], [104.53, 60.47], [104.0, 60.25], [103.47, 60.47], [103.32, 60.82], [103.25, 60.85], [103.0, 60.75], [102.47, 60.97], [102.25, 61.5], [102.35, 61.75], [102.32, 61.82], [101.97, 61.97]], [[106.57, 62.43], [106.68, 62.18], [106.93, 62.07], [106.82, 62.32], [106.57, 62.43]]]]}, "2022-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.75, 63.0], [110.97, 63.53], [111.5, 63.75], [112.03, 63.53], [112.25, 63.0], [112.15, 62.75], [112.25, 62.5], [112.03, 61.97], [111.5, 61.75], [110.97, 61.97], [110.75, 62.5], [110.85, 62.75], [110.75, 63.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.029681364943201}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.674344543550404}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.711835078918227, 4.096571445107827, 4.346208417028038, 4.700320072395641, 4.464535007311952, 6.44304680855646]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.4490793319161526, 2.6019156249769253, 2.4536536281771646, 3.1398662485003683, 3.0838670801384183, 6.412835420624674]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.133211232127368, -5.821793140616933, -5.969855612625793, -5.572971233598106, -5.529284038524817, -3.8676850585453053]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.647329711854468, -7.133517886447407, -8.029681364943201, -6.971605202793683, -6.556867638500478, -3.869056299810211]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5409238458640717, -1.7680504526372178, -1.759708025186594, -1.6717840543667335, -1.7077489086164663, -1.3521172628622318]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7124562585641234, -2.202813017794435, -2.322202124704605, -2.0331249908566598, -2.000156809103111, -1.3733844227822851]}}