{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:11.375864", "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": "2021-Oct-11_to_2021-Oct-15_93.0_57.5"}, "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": 2021100000413}, "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": "October 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 15 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 210642.90600108515}, "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": 57.5}, "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": 93.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "93.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 91.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 104.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[98.68, 56.18], [98.75, 56.15], [99.0, 56.25], [99.25, 56.15], [99.5, 56.25], [99.75, 56.15], [100.0, 56.25], [100.25, 56.15], [100.5, 56.25], [100.75, 56.15], [101.0, 56.25], [101.53, 56.03], [101.75, 55.5], [101.53, 54.97], [101.0, 54.75], [100.75, 54.85], [100.5, 54.75], [100.25, 54.85], [100.0, 54.75], [99.75, 54.85], [99.68, 54.82], [99.53, 54.47], [99.0, 54.25], [98.47, 54.47], [98.32, 54.82], [98.25, 54.85], [98.0, 54.75], [97.75, 54.85], [97.5, 54.75], [97.25, 54.85], [97.0, 54.75], [96.75, 54.85], [96.5, 54.75], [96.25, 54.85], [96.18, 54.82], [96.03, 54.47], [95.5, 54.25], [95.25, 54.35], [95.0, 54.25], [94.75, 54.35], [94.5, 54.25], [93.97, 54.47], [93.82, 54.82], [93.47, 54.97], [93.32, 55.32], [93.25, 55.35], [93.0, 55.25], [92.75, 55.35], [92.5, 55.25], [91.97, 55.47], [91.82, 55.82], [91.47, 55.97], [91.32, 56.32], [91.25, 56.35], [91.0, 56.25], [90.47, 56.47], [90.25, 57.0], [90.35, 57.25], [90.25, 57.5], [90.47, 58.03], [91.0, 58.25], [91.25, 58.15], [91.32, 58.18], [91.47, 58.53], [91.82, 58.68], [91.97, 59.03], [92.5, 59.25], [92.75, 59.15], [93.0, 59.25], [93.53, 59.03], [93.68, 58.68], [93.75, 58.65], [94.0, 58.75], [94.25, 58.65], [94.5, 58.75], [95.03, 58.53], [95.18, 58.18], [95.25, 58.15], [95.5, 58.25], [95.75, 58.15], [95.88, 58.2], [95.75, 58.5], [95.97, 59.03], [96.5, 59.25], [96.75, 59.15], [96.82, 59.18], [96.97, 59.53], [97.5, 59.75], [97.75, 59.65], [98.0, 59.75], [98.25, 59.65], [98.38, 59.7], [98.25, 60.0], [98.47, 60.53], [99.0, 60.75], [99.25, 60.65], [99.5, 60.75], [99.75, 60.65], [100.0, 60.75], [100.53, 60.53], [100.68, 60.18], [100.75, 60.15], [101.0, 60.25], [101.25, 60.15], [101.32, 60.18], [101.47, 60.53], [102.0, 60.75], [102.53, 60.53], [102.68, 60.18], [103.03, 60.03], [103.18, 59.68], [103.25, 59.65], [103.5, 59.75], [103.75, 59.65], [104.0, 59.75], [104.53, 59.53], [104.75, 59.0], [104.65, 58.75], [104.68, 58.68], [105.03, 58.53], [105.25, 58.0], [105.03, 57.47], [104.5, 57.25], [104.25, 57.35], [104.0, 57.25], [103.75, 57.35], [103.5, 57.25], [103.25, 57.35], [103.18, 57.32], [103.03, 56.97], [102.5, 56.75], [101.97, 56.97], [101.82, 57.32], [101.75, 57.35], [101.5, 57.25], [101.25, 57.35], [101.18, 57.32], [101.03, 56.97], [100.5, 56.75], [100.0, 56.96], [99.5, 56.75], [99.25, 56.85], [99.0, 56.75], [98.5, 56.96], [98.0, 56.75], [98.53, 56.53], [98.68, 56.18]], [[97.75, 56.85], [97.5, 56.75], [97.25, 56.85], [97.0, 56.75], [97.5, 56.54], [98.0, 56.75], [97.75, 56.85]], [[96.75, 56.85], [96.68, 56.82], [96.63, 56.7], [96.75, 56.65], [97.0, 56.75], [96.75, 56.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.25, 57.5], [90.47, 58.03], [91.0, 58.25], [91.25, 58.15], [91.32, 58.18], [91.47, 58.53], [92.0, 58.75], [92.25, 58.65], [92.32, 58.68], [92.47, 59.03], [93.0, 59.25], [93.53, 59.03], [93.68, 58.68], [93.75, 58.65], [94.0, 58.75], [94.25, 58.65], [94.5, 58.75], [95.03, 58.53], [95.25, 58.0], [95.15, 57.75], [95.25, 57.5], [95.03, 56.97], [94.5, 56.75], [94.25, 56.85], [94.0, 56.75], [93.75, 56.85], [93.68, 56.82], [93.53, 56.47], [93.0, 56.25], [92.75, 56.35], [92.5, 56.25], [92.25, 56.35], [92.0, 56.25], [91.75, 56.35], [91.5, 56.25], [91.25, 56.35], [91.0, 56.25], [90.47, 56.47], [90.25, 57.0], [90.35, 57.25], [90.25, 57.5]]]]}, "2021-10-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.25, 57.5], [90.47, 58.03], [91.0, 58.25], [91.25, 58.15], [91.32, 58.18], [91.47, 58.53], [91.82, 58.68], [91.97, 59.03], [92.5, 59.25], [92.75, 59.15], [93.0, 59.25], [93.53, 59.03], [93.68, 58.68], [93.75, 58.65], [94.0, 58.75], [94.25, 58.65], [94.5, 58.75], [95.03, 58.53], [95.18, 58.18], [95.25, 58.15], [95.5, 58.25], [95.75, 58.15], [95.88, 58.2], [95.75, 58.5], [95.97, 59.03], [96.5, 59.25], [96.75, 59.15], [96.82, 59.18], [96.97, 59.53], [97.5, 59.75], [97.75, 59.65], [98.0, 59.75], [98.25, 59.65], [98.38, 59.7], [98.25, 60.0], [98.47, 60.53], [99.0, 60.75], [99.25, 60.65], [99.5, 60.75], [99.75, 60.65], [100.0, 60.75], [100.53, 60.53], [100.68, 60.18], [100.75, 60.15], [101.0, 60.25], [101.25, 60.15], [101.32, 60.18], [101.47, 60.53], [102.0, 60.75], [102.53, 60.53], [102.68, 60.18], [103.03, 60.03], [103.18, 59.68], [103.25, 59.65], [103.5, 59.75], [103.75, 59.65], [104.0, 59.75], [104.53, 59.53], [104.75, 59.0], [104.65, 58.75], [104.68, 58.68], [105.03, 58.53], [105.25, 58.0], [105.03, 57.47], [104.5, 57.25], [104.25, 57.35], [104.0, 57.25], [103.75, 57.35], [103.5, 57.25], [103.25, 57.35], [103.18, 57.32], [103.03, 56.97], [102.5, 56.75], [101.97, 56.97], [101.82, 57.32], [101.75, 57.35], [101.5, 57.25], [101.25, 57.35], [101.18, 57.32], [101.03, 56.97], [100.5, 56.75], [100.0, 56.96], [99.5, 56.75], [99.25, 56.85], [99.0, 56.75], [98.5, 56.96], [98.0, 56.75], [97.75, 56.85], [97.5, 56.75], [97.25, 56.85], [97.0, 56.75], [96.75, 56.85], [96.68, 56.82], [96.53, 56.47], [96.0, 56.25], [95.75, 56.35], [95.5, 56.25], [95.25, 56.35], [95.0, 56.25], [94.75, 56.35], [94.5, 56.25], [94.25, 56.35], [94.18, 56.32], [94.03, 55.97], [93.5, 55.75], [93.25, 55.85], [93.18, 55.82], [93.03, 55.47], [92.5, 55.25], [91.97, 55.47], [91.82, 55.82], [91.47, 55.97], [91.32, 56.32], [91.25, 56.35], [91.0, 56.25], [90.47, 56.47], [90.25, 57.0], [90.35, 57.25], [90.25, 57.5]]]]}, "2021-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.25, 57.5], [90.47, 58.03], [91.0, 58.25], [91.25, 58.15], [91.32, 58.18], [91.47, 58.53], [91.82, 58.68], [91.97, 59.03], [92.5, 59.25], [92.75, 59.15], [93.0, 59.25], [93.53, 59.03], [93.68, 58.68], [93.75, 58.65], [94.0, 58.75], [94.25, 58.65], [94.5, 58.75], [95.03, 58.53], [95.18, 58.18], [95.25, 58.15], [95.5, 58.25], [95.75, 58.15], [95.88, 58.2], [95.75, 58.5], [95.97, 59.03], [96.5, 59.25], [96.75, 59.15], [96.82, 59.18], [96.97, 59.53], [97.5, 59.75], [97.75, 59.65], [98.0, 59.75], [98.25, 59.65], [98.38, 59.7], [98.25, 60.0], [98.47, 60.53], [99.0, 60.75], [99.25, 60.65], [99.5, 60.75], [99.75, 60.65], [100.0, 60.75], [100.53, 60.53], [100.68, 60.18], [100.75, 60.15], [101.0, 60.25], [101.25, 60.15], [101.32, 60.18], [101.47, 60.53], [102.0, 60.75], [102.53, 60.53], [102.68, 60.18], [103.03, 60.03], [103.18, 59.68], [103.25, 59.65], [103.5, 59.75], [103.75, 59.65], [104.0, 59.75], [104.53, 59.53], [104.75, 59.0], [104.65, 58.75], [104.68, 58.68], [105.03, 58.53], [105.25, 58.0], [105.03, 57.47], [104.5, 57.25], [104.25, 57.35], [104.0, 57.25], [103.75, 57.35], [103.5, 57.25], [103.25, 57.35], [103.18, 57.32], [103.03, 56.97], [102.5, 56.75], [101.97, 56.97], [101.82, 57.32], [101.75, 57.35], [101.5, 57.25], [101.25, 57.35], [101.18, 57.32], [101.03, 56.97], [100.5, 56.75], [100.0, 56.96], [99.5, 56.75], [99.25, 56.85], [99.0, 56.75], [98.5, 56.96], [98.0, 56.75], [98.53, 56.53], [98.68, 56.18], [98.75, 56.15], [99.0, 56.25], [99.25, 56.15], [99.5, 56.25], [99.75, 56.15], [100.0, 56.25], [100.25, 56.15], [100.5, 56.25], [100.75, 56.15], [101.0, 56.25], [101.53, 56.03], [101.75, 55.5], [101.53, 54.97], [101.0, 54.75], [100.75, 54.85], [100.5, 54.75], [100.25, 54.85], [100.0, 54.75], [99.75, 54.85], [99.68, 54.82], [99.53, 54.47], [99.0, 54.25], [98.47, 54.47], [98.32, 54.82], [98.25, 54.85], [98.0, 54.75], [97.75, 54.85], [97.5, 54.75], [97.25, 54.85], [97.0, 54.75], [96.75, 54.85], [96.5, 54.75], [96.25, 54.85], [96.18, 54.82], [96.03, 54.47], [95.5, 54.25], [95.25, 54.35], [95.0, 54.25], [94.75, 54.35], [94.5, 54.25], [93.97, 54.47], [93.82, 54.82], [93.47, 54.97], [93.32, 55.32], [93.25, 55.35], [93.0, 55.25], [92.75, 55.35], [92.5, 55.25], [91.97, 55.47], [91.82, 55.82], [91.47, 55.97], [91.32, 56.32], [91.25, 56.35], [91.0, 56.25], [90.47, 56.47], [90.25, 57.0], [90.35, 57.25], [90.25, 57.5]], [[97.75, 56.85], [97.5, 56.75], [97.25, 56.85], [97.0, 56.75], [97.5, 56.54], [98.0, 56.75], [97.75, 56.85]], [[96.75, 56.85], [96.68, 56.82], [96.63, 56.7], [96.75, 56.65], [97.0, 56.75], [96.75, 56.85]]]]}, "2021-10-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.25, 57.5], [90.47, 58.03], [91.0, 58.25], [91.25, 58.15], [91.32, 58.18], [91.47, 58.53], [91.82, 58.68], [91.97, 59.03], [92.5, 59.25], [93.03, 59.03], [93.18, 58.68], [93.25, 58.65], [93.5, 58.75], [93.75, 58.65], [94.0, 58.75], [94.25, 58.65], [94.5, 58.75], [95.03, 58.53], [95.18, 58.18], [95.25, 58.15], [95.5, 58.25], [95.75, 58.15], [95.88, 58.2], [95.75, 58.5], [95.97, 59.03], [96.5, 59.25], [96.75, 59.15], [96.82, 59.18], [96.97, 59.53], [97.5, 59.75], [97.75, 59.65], [98.0, 59.75], [98.25, 59.65], [98.38, 59.7], [98.25, 60.0], [98.47, 60.53], [99.0, 60.75], [99.25, 60.65], [99.5, 60.75], [99.75, 60.65], [100.0, 60.75], [100.53, 60.53], [100.68, 60.18], [100.75, 60.15], [101.0, 60.25], [101.25, 60.15], [101.32, 60.18], [101.47, 60.53], [102.0, 60.75], [102.53, 60.53], [102.68, 60.18], [103.03, 60.03], [103.18, 59.68], [103.25, 59.65], [103.5, 59.75], [103.75, 59.65], [104.0, 59.75], [104.53, 59.53], [104.75, 59.0], [104.65, 58.75], [104.68, 58.68], [105.03, 58.53], [105.25, 58.0], [105.03, 57.47], [104.5, 57.25], [104.25, 57.35], [104.0, 57.25], [103.75, 57.35], [103.5, 57.25], [103.25, 57.35], [103.18, 57.32], [103.03, 56.97], [102.5, 56.75], [101.97, 56.97], [101.82, 57.32], [101.75, 57.35], [101.5, 57.25], [101.25, 57.35], [101.18, 57.32], [101.03, 56.97], [100.5, 56.75], [100.0, 56.96], [99.5, 56.75], [99.25, 56.85], [99.0, 56.75], [98.5, 56.96], [98.0, 56.75], [98.53, 56.53], [98.68, 56.18], [98.75, 56.15], [99.0, 56.25], [99.25, 56.15], [99.5, 56.25], [99.75, 56.15], [100.0, 56.25], [100.25, 56.15], [100.5, 56.25], [100.75, 56.15], [101.0, 56.25], [101.53, 56.03], [101.75, 55.5], [101.53, 54.97], [101.0, 54.75], [100.75, 54.85], [100.5, 54.75], [100.25, 54.85], [100.0, 54.75], [99.75, 54.85], [99.68, 54.82], [99.53, 54.47], [99.0, 54.25], [98.47, 54.47], [98.32, 54.82], [98.25, 54.85], [98.0, 54.75], [97.75, 54.85], [97.5, 54.75], [97.25, 54.85], [97.0, 54.75], [96.75, 54.85], [96.5, 54.75], [96.25, 54.85], [96.18, 54.82], [96.03, 54.47], [95.5, 54.25], [95.25, 54.35], [95.0, 54.25], [94.75, 54.35], [94.5, 54.25], [93.97, 54.47], [93.82, 54.82], [93.47, 54.97], [93.32, 55.32], [93.25, 55.35], [93.0, 55.25], [92.75, 55.35], [92.5, 55.25], [91.97, 55.47], [91.82, 55.82], [91.47, 55.97], [91.32, 56.32], [91.25, 56.35], [91.0, 56.25], [90.47, 56.47], [90.25, 57.0], [90.35, 57.25], [90.25, 57.5]], [[97.75, 56.85], [97.5, 56.75], [97.25, 56.85], [97.0, 56.75], [97.5, 56.54], [98.0, 56.75], [97.75, 56.85]], [[96.75, 56.85], [96.68, 56.82], [96.63, 56.7], [96.75, 56.65], [97.0, 56.75], [96.75, 56.85]]]]}, "2021-10-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.0, 55.25], [92.47, 55.47], [92.25, 56.0], [92.47, 56.53], [93.0, 56.75], [93.25, 56.65], [93.5, 56.75], [93.75, 56.65], [94.0, 56.75], [94.25, 56.65], [94.5, 56.75], [94.75, 56.65], [95.0, 56.75], [95.25, 56.65], [95.5, 56.75], [95.75, 56.65], [96.0, 56.75], [96.25, 56.65], [96.5, 56.75], [96.75, 56.65], [97.0, 56.75], [97.5, 56.54], [98.0, 56.75], [98.53, 56.53], [98.68, 56.18], [98.75, 56.15], [99.0, 56.25], [99.25, 56.15], [99.5, 56.25], [99.75, 56.15], [100.0, 56.25], [100.25, 56.15], [100.5, 56.25], [100.75, 56.15], [101.0, 56.25], [101.53, 56.03], [101.75, 55.5], [101.53, 54.97], [101.0, 54.75], [100.75, 54.85], [100.5, 54.75], [100.25, 54.85], [100.0, 54.75], [99.75, 54.85], [99.68, 54.82], [99.53, 54.47], [99.0, 54.25], [98.47, 54.47], [98.32, 54.82], [98.25, 54.85], [98.0, 54.75], [97.75, 54.85], [97.5, 54.75], [97.25, 54.85], [97.0, 54.75], [96.75, 54.85], [96.5, 54.75], [96.25, 54.85], [96.18, 54.82], [96.03, 54.47], [95.5, 54.25], [95.25, 54.35], [95.0, 54.25], [94.75, 54.35], [94.5, 54.25], [93.97, 54.47], [93.82, 54.82], [93.47, 54.97], [93.32, 55.32], [93.25, 55.35], [93.0, 55.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.582731375807668}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.163431146954986}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-3.31179521274845, -4.5274101523334025, -4.919422618178601, -6.2641713714324965, -4.629803391561268]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.444471079278685, -7.041230385901599, -7.2123285489369096, -8.30227884600123, -7.501937240574193]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.458484404906651, -5.352372993416259, -5.847434079925993, -7.157898194261613, -6.453479886258708]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.365080300016473, -6.6212664687754454, -6.978303441702508, -9.582731375807668, -9.072145766960944]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3791533809258611, -1.343602896919708, -1.4563885253559392, -1.7474370448642338, -1.556621647600273]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5251714109835341, -1.5463769638577092, -1.7446827412393244, -2.3694835425620027, -2.2173749086488974]}}