{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:20:43.096805", "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": "2020-Jul-23_to_2020-Jul-28_99.0_66.5"}, "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": 2020070000837}, "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": "July 23 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 28 2020"}, "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": 290678.7240637023}, "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": ["Laptev Sea"]}, "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": 66.5}, "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": 99.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "99.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 94.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 108.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 73.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.75, 65.5], [96.97, 66.03], [97.38, 66.2], [97.25, 66.5], [97.47, 67.03], [98.0, 67.25], [98.25, 67.15], [98.32, 67.18], [98.47, 67.53], [98.82, 67.68], [98.97, 68.03], [99.5, 68.25], [99.75, 68.15], [99.82, 68.18], [99.97, 68.53], [100.32, 68.68], [100.35, 68.75], [100.25, 69.0], [100.35, 69.25], [100.25, 69.5], [100.47, 70.03], [100.82, 70.18], [100.97, 70.53], [101.32, 70.68], [101.35, 70.75], [101.25, 71.0], [101.35, 71.25], [101.25, 71.5], [101.47, 72.03], [102.0, 72.25], [102.25, 72.15], [102.32, 72.18], [102.47, 72.53], [103.0, 72.75], [103.25, 72.65], [103.5, 72.75], [103.75, 72.65], [103.82, 72.68], [103.97, 73.03], [104.5, 73.25], [104.75, 73.15], [105.0, 73.25], [105.25, 73.15], [105.5, 73.25], [105.75, 73.15], [105.82, 73.18], [105.97, 73.53], [106.5, 73.75], [106.75, 73.65], [107.0, 73.75], [107.25, 73.65], [107.5, 73.75], [107.75, 73.65], [108.0, 73.75], [108.53, 73.53], [108.68, 73.18], [109.03, 73.03], [109.25, 72.5], [109.03, 71.97], [108.5, 71.75], [108.25, 71.85], [108.0, 71.75], [107.75, 71.85], [107.68, 71.82], [107.53, 71.47], [107.0, 71.25], [106.75, 71.35], [106.68, 71.32], [106.53, 70.97], [106.0, 70.75], [105.75, 70.85], [105.5, 70.75], [105.25, 70.85], [105.0, 70.75], [104.75, 70.85], [104.68, 70.82], [104.53, 70.47], [104.18, 70.32], [104.03, 69.97], [103.68, 69.82], [103.65, 69.75], [103.68, 69.68], [104.03, 69.53], [104.25, 69.0], [104.03, 68.47], [103.68, 68.32], [103.65, 68.25], [103.75, 68.0], [103.53, 67.47], [103.18, 67.32], [103.15, 67.25], [103.25, 67.0], [103.03, 66.47], [102.68, 66.32], [102.53, 65.97], [102.18, 65.82], [102.03, 65.47], [101.5, 65.25], [101.25, 65.35], [101.0, 65.25], [100.75, 65.35], [100.68, 65.32], [100.53, 64.97], [100.0, 64.75], [99.75, 64.85], [99.68, 64.82], [99.53, 64.47], [99.0, 64.25], [98.75, 64.35], [98.5, 64.25], [98.25, 64.35], [98.0, 64.25], [97.47, 64.47], [97.32, 64.82], [96.97, 64.97], [96.75, 65.5]]]]}, "2020-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.35, 66.75], [95.25, 67.0], [95.35, 67.25], [95.25, 67.5], [95.47, 68.03], [96.0, 68.25], [96.25, 68.15], [96.5, 68.25], [96.75, 68.15], [96.82, 68.18], [96.85, 68.25], [96.75, 68.5], [96.97, 69.03], [97.32, 69.18], [97.47, 69.53], [98.0, 69.75], [98.25, 69.65], [98.5, 69.75], [98.75, 69.65], [98.82, 69.68], [98.97, 70.03], [99.5, 70.25], [99.75, 70.15], [99.82, 70.18], [99.97, 70.53], [100.32, 70.68], [100.47, 71.03], [100.82, 71.18], [100.97, 71.53], [101.32, 71.68], [101.47, 72.03], [102.0, 72.25], [102.25, 72.15], [102.32, 72.18], [102.47, 72.53], [103.0, 72.75], [103.25, 72.65], [103.5, 72.75], [103.75, 72.65], [103.82, 72.68], [103.97, 73.03], [104.5, 73.25], [104.75, 73.15], [105.0, 73.25], [105.25, 73.15], [105.5, 73.25], [105.75, 73.15], [105.82, 73.18], [105.97, 73.53], [106.5, 73.75], [106.75, 73.65], [107.0, 73.75], [107.25, 73.65], [107.5, 73.75], [107.75, 73.65], [108.0, 73.75], [108.53, 73.53], [108.68, 73.18], [109.03, 73.03], [109.25, 72.5], [109.03, 71.97], [108.5, 71.75], [108.25, 71.85], [108.0, 71.75], [107.75, 71.85], [107.68, 71.82], [107.53, 71.47], [107.0, 71.25], [106.75, 71.35], [106.68, 71.32], [106.53, 70.97], [106.0, 70.75], [105.75, 70.85], [105.5, 70.75], [105.25, 70.85], [105.0, 70.75], [104.75, 70.85], [104.68, 70.82], [104.53, 70.47], [104.18, 70.32], [104.03, 69.97], [103.68, 69.82], [103.65, 69.75], [103.68, 69.68], [103.75, 69.65], [104.0, 69.75], [104.53, 69.53], [104.68, 69.18], [105.03, 69.03], [105.25, 68.5], [105.03, 67.97], [104.5, 67.75], [104.25, 67.85], [104.18, 67.82], [104.15, 67.75], [104.25, 67.5], [104.03, 66.97], [103.68, 66.82], [103.53, 66.47], [103.0, 66.25], [102.75, 66.35], [102.68, 66.32], [102.53, 65.97], [102.18, 65.82], [102.03, 65.47], [101.5, 65.25], [101.25, 65.35], [101.0, 65.25], [100.75, 65.35], [100.68, 65.32], [100.53, 64.97], [100.0, 64.75], [99.75, 64.85], [99.68, 64.82], [99.53, 64.47], [99.0, 64.25], [98.75, 64.35], [98.5, 64.25], [98.25, 64.35], [98.0, 64.25], [97.75, 64.35], [97.5, 64.25], [96.97, 64.47], [96.82, 64.82], [96.75, 64.85], [96.5, 64.75], [95.97, 64.97], [95.82, 65.32], [95.47, 65.47], [95.25, 66.0], [95.35, 66.25], [95.25, 66.5], [95.35, 66.75]]]]}, "2020-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.35, 66.75], [95.25, 67.0], [95.35, 67.25], [95.25, 67.5], [95.47, 68.03], [96.0, 68.25], [96.25, 68.15], [96.5, 68.25], [96.75, 68.15], [96.82, 68.18], [96.85, 68.25], [96.75, 68.5], [96.97, 69.03], [97.32, 69.18], [97.47, 69.53], [98.0, 69.75], [98.25, 69.65], [98.5, 69.75], [98.75, 69.65], [98.82, 69.68], [98.97, 70.03], [99.5, 70.25], [99.75, 70.15], [99.82, 70.18], [99.97, 70.53], [100.32, 70.68], [100.47, 71.03], [100.82, 71.18], [100.97, 71.53], [101.32, 71.68], [101.47, 72.03], [102.0, 72.25], [102.25, 72.15], [102.32, 72.18], [102.47, 72.53], [103.0, 72.75], [103.25, 72.65], [103.5, 72.75], [103.75, 72.65], [103.82, 72.68], [103.97, 73.03], [104.5, 73.25], [104.75, 73.15], [105.0, 73.25], [105.25, 73.15], [105.5, 73.25], [105.75, 73.15], [105.82, 73.18], [105.97, 73.53], [106.5, 73.75], [106.75, 73.65], [107.0, 73.75], [107.25, 73.65], [107.5, 73.75], [107.75, 73.65], [108.0, 73.75], [108.53, 73.53], [108.68, 73.18], [109.03, 73.03], [109.25, 72.5], [109.03, 71.97], [108.5, 71.75], [108.25, 71.85], [108.0, 71.75], [107.75, 71.85], [107.68, 71.82], [107.53, 71.47], [107.0, 71.25], [106.75, 71.35], [106.68, 71.32], [106.53, 70.97], [106.0, 70.75], [105.75, 70.85], [105.5, 70.75], [105.25, 70.85], [105.0, 70.75], [104.75, 70.85], [104.68, 70.82], [104.53, 70.47], [104.18, 70.32], [104.13, 70.2], [104.53, 70.03], [104.68, 69.68], [104.75, 69.65], [105.0, 69.75], [105.53, 69.53], [105.75, 69.0], [105.65, 68.75], [105.68, 68.68], [106.03, 68.53], [106.18, 68.18], [106.53, 68.03], [106.68, 67.68], [107.03, 67.53], [107.25, 67.0], [107.15, 66.75], [107.18, 66.68], [107.53, 66.53], [107.68, 66.18], [108.03, 66.03], [108.18, 65.68], [108.53, 65.53], [108.75, 65.0], [108.53, 64.47], [108.18, 64.32], [108.03, 63.97], [107.5, 63.75], [107.25, 63.85], [107.0, 63.75], [106.75, 63.85], [106.5, 63.75], [105.97, 63.97], [105.82, 64.32], [105.75, 64.35], [105.5, 64.25], [105.25, 64.35], [105.0, 64.25], [104.75, 64.35], [104.5, 64.25], [104.25, 64.35], [104.0, 64.25], [103.47, 64.47], [103.32, 64.82], [103.25, 64.85], [103.0, 64.75], [102.75, 64.85], [102.68, 64.82], [102.53, 64.47], [102.0, 64.25], [101.75, 64.35], [101.5, 64.25], [101.25, 64.35], [101.18, 64.32], [101.03, 63.97], [100.5, 63.75], [100.25, 63.85], [100.0, 63.75], [99.75, 63.85], [99.5, 63.75], [99.25, 63.85], [99.0, 63.75], [98.75, 63.85], [98.5, 63.75], [97.97, 63.97], [97.82, 64.32], [97.75, 64.35], [97.5, 64.25], [97.25, 64.35], [97.0, 64.25], [96.47, 64.47], [96.32, 64.82], [95.97, 64.97], [95.82, 65.32], [95.47, 65.47], [95.25, 66.0], [95.35, 66.25], [95.25, 66.5], [95.35, 66.75]]]]}, "2020-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.25, 67.0], [94.47, 67.53], [94.82, 67.68], [94.97, 68.03], [95.5, 68.25], [95.75, 68.15], [96.0, 68.25], [96.25, 68.15], [96.5, 68.25], [96.75, 68.15], [96.82, 68.18], [96.85, 68.25], [96.75, 68.5], [96.97, 69.03], [97.32, 69.18], [97.47, 69.53], [98.0, 69.75], [98.25, 69.65], [98.5, 69.75], [98.75, 69.65], [98.82, 69.68], [98.97, 70.03], [99.5, 70.25], [99.75, 70.15], [99.82, 70.18], [99.97, 70.53], [100.32, 70.68], [100.47, 71.03], [100.82, 71.18], [100.97, 71.53], [101.32, 71.68], [101.47, 72.03], [102.0, 72.25], [102.25, 72.15], [102.32, 72.18], [102.47, 72.53], [103.0, 72.75], [103.25, 72.65], [103.5, 72.75], [103.75, 72.65], [103.82, 72.68], [103.97, 73.03], [104.5, 73.25], [104.75, 73.15], [105.0, 73.25], [105.25, 73.15], [105.5, 73.25], [105.75, 73.15], [105.82, 73.18], [105.97, 73.53], [106.5, 73.75], [106.75, 73.65], [107.0, 73.75], [107.25, 73.65], [107.5, 73.75], [107.75, 73.65], [108.0, 73.75], [108.53, 73.53], [108.68, 73.18], [109.03, 73.03], [109.25, 72.5], [109.03, 71.97], [108.5, 71.75], [108.25, 71.85], [108.0, 71.75], [107.75, 71.85], [107.68, 71.82], [107.53, 71.47], [107.0, 71.25], [106.75, 71.35], [106.68, 71.32], [106.53, 70.97], [106.0, 70.75], [105.75, 70.85], [105.5, 70.75], [105.25, 70.85], [105.0, 70.75], [104.75, 70.85], [104.68, 70.82], [104.53, 70.47], [104.18, 70.32], [104.13, 70.2], [104.53, 70.03], [104.68, 69.68], [104.75, 69.65], [105.0, 69.75], [105.53, 69.53], [105.75, 69.0], [105.65, 68.75], [105.68, 68.68], [106.03, 68.53], [106.18, 68.18], [106.53, 68.03], [106.68, 67.68], [107.03, 67.53], [107.25, 67.0], [107.15, 66.75], [107.18, 66.68], [107.53, 66.53], [107.68, 66.18], [108.03, 66.03], [108.18, 65.68], [108.53, 65.53], [108.75, 65.0], [108.53, 64.47], [108.18, 64.32], [108.03, 63.97], [107.5, 63.75], [107.25, 63.85], [107.0, 63.75], [106.75, 63.85], [106.5, 63.75], [105.97, 63.97], [105.82, 64.32], [105.75, 64.35], [105.5, 64.25], [105.25, 64.35], [105.0, 64.25], [104.75, 64.35], [104.5, 64.25], [104.25, 64.35], [104.0, 64.25], [103.47, 64.47], [103.32, 64.82], [103.25, 64.85], [103.0, 64.75], [102.75, 64.85], [102.68, 64.82], [102.53, 64.47], [102.0, 64.25], [101.75, 64.35], [101.5, 64.25], [101.25, 64.35], [101.18, 64.32], [101.03, 63.97], [100.5, 63.75], [100.25, 63.85], [100.0, 63.75], [99.75, 63.85], [99.5, 63.75], [99.25, 63.85], [99.0, 63.75], [98.75, 63.85], [98.5, 63.75], [97.97, 63.97], [97.82, 64.32], [97.75, 64.35], [97.5, 64.25], [97.25, 64.35], [97.0, 64.25], [96.47, 64.47], [96.32, 64.82], [95.97, 64.97], [95.82, 65.32], [95.47, 65.47], [95.32, 65.82], [94.97, 65.97], [94.82, 66.32], [94.47, 66.47], [94.25, 67.0]]]]}, "2020-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.25, 67.0], [94.47, 67.53], [94.82, 67.68], [94.97, 68.03], [95.5, 68.25], [95.75, 68.15], [96.0, 68.25], [96.25, 68.15], [96.5, 68.25], [96.75, 68.15], [96.82, 68.18], [96.85, 68.25], [96.75, 68.5], [96.97, 69.03], [97.32, 69.18], [97.47, 69.53], [98.0, 69.75], [98.25, 69.65], [98.5, 69.75], [98.75, 69.65], [99.0, 69.75], [99.25, 69.65], [99.5, 69.75], [99.75, 69.65], [100.0, 69.75], [100.25, 69.65], [100.5, 69.75], [100.75, 69.65], [101.0, 69.75], [101.25, 69.65], [101.5, 69.75], [101.75, 69.65], [102.0, 69.75], [102.53, 69.53], [102.68, 69.18], [102.75, 69.15], [103.0, 69.25], [103.25, 69.15], [103.32, 69.18], [103.35, 69.25], [103.25, 69.5], [103.47, 70.03], [104.0, 70.25], [104.53, 70.03], [104.68, 69.68], [104.75, 69.65], [105.0, 69.75], [105.53, 69.53], [105.75, 69.0], [105.65, 68.75], [105.68, 68.68], [106.03, 68.53], [106.18, 68.18], [106.53, 68.03], [106.68, 67.68], [107.03, 67.53], [107.25, 67.0], [107.15, 66.75], [107.18, 66.68], [107.53, 66.53], [107.68, 66.18], [108.03, 66.03], [108.18, 65.68], [108.53, 65.53], [108.75, 65.0], [108.53, 64.47], [108.18, 64.32], [108.03, 63.97], [107.5, 63.75], [107.25, 63.85], [107.0, 63.75], [106.75, 63.85], [106.5, 63.75], [105.97, 63.97], [105.82, 64.32], [105.75, 64.35], [105.5, 64.25], [105.25, 64.35], [105.0, 64.25], [104.75, 64.35], [104.5, 64.25], [104.25, 64.35], [104.0, 64.25], [103.47, 64.47], [103.32, 64.82], [103.25, 64.85], [103.0, 64.75], [102.75, 64.85], [102.68, 64.82], [102.53, 64.47], [102.0, 64.25], [101.75, 64.35], [101.5, 64.25], [101.25, 64.35], [101.18, 64.32], [101.03, 63.97], [100.5, 63.75], [100.25, 63.85], [100.0, 63.75], [99.75, 63.85], [99.5, 63.75], [99.25, 63.85], [99.0, 63.75], [98.75, 63.85], [98.5, 63.75], [97.97, 63.97], [97.82, 64.32], [97.75, 64.35], [97.5, 64.25], [97.25, 64.35], [97.0, 64.25], [96.47, 64.47], [96.32, 64.82], [95.97, 64.97], [95.82, 65.32], [95.47, 65.47], [95.32, 65.82], [94.97, 65.97], [94.82, 66.32], [94.47, 66.47], [94.25, 67.0]]]]}, "2020-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.25, 67.0], [94.47, 67.53], [94.82, 67.68], [94.97, 68.03], [95.5, 68.25], [95.75, 68.15], [96.0, 68.25], [96.25, 68.15], [96.5, 68.25], [96.75, 68.15], [97.0, 68.25], [97.25, 68.15], [97.5, 68.25], [97.75, 68.15], [98.0, 68.25], [98.25, 68.15], [98.5, 68.25], [98.75, 68.15], [99.0, 68.25], [99.53, 68.03], [99.68, 67.68], [100.03, 67.53], [100.25, 67.0], [100.03, 66.47], [99.68, 66.32], [99.63, 66.2], [100.03, 66.03], [100.25, 65.5], [100.15, 65.25], [100.18, 65.18], [100.53, 65.03], [100.75, 64.5], [100.53, 63.97], [100.0, 63.75], [99.75, 63.85], [99.5, 63.75], [99.25, 63.85], [99.0, 63.75], [98.75, 63.85], [98.5, 63.75], [97.97, 63.97], [97.82, 64.32], [97.75, 64.35], [97.5, 64.25], [97.25, 64.35], [97.0, 64.25], [96.47, 64.47], [96.32, 64.82], [95.97, 64.97], [95.82, 65.32], [95.47, 65.47], [95.32, 65.82], [94.97, 65.97], [94.82, 66.32], [94.47, 66.47], [94.25, 67.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.642133292255892}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.841726521403519}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.589101781592774, 5.912672037954451, 6.4828730028525, 5.756071706100727, 6.735649090236848, 7.787833857327371]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.7607571910096453, 2.7275784212486656, 3.1766433700607877, 2.2014874740696087, 2.9448897083078123, 5.969680394175555]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.441614194263629, -6.843612318506445, -6.791752920772487, -7.391305355444924, -6.814134411716593, -5.264423981951923]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.12972622266534, -7.827532725500419, -8.367236961928427, -9.642133292255892, -8.159754970231916, -5.675006305886541]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4191116844287992, -1.5540442555701373, -1.5782668267453197, -1.7419485195832884, -1.6696715747166697, -1.3822797185659896]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5168473624873706, -1.7926150776847771, -1.8592181475227398, -2.1935398931186714, -1.9412727545468462, -1.5092628488997977]}}