{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:10.668162", "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-Feb-04_to_2021-Feb-08_97.5_70.0"}, "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": 2021020000246}, "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": "February 04 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 08 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": 57269.671832179185}, "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": ["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": 70.0}, "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": 97.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "97.5\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": 104.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 67.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 70.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.47, 68.97], [94.25, 69.5], [94.47, 70.03], [95.0, 70.25], [95.25, 70.15], [95.5, 70.25], [95.75, 70.15], [96.0, 70.25], [96.3, 70.13], [96.47, 70.53], [97.0, 70.75], [97.25, 70.65], [97.5, 70.75], [98.03, 70.53], [98.25, 70.0], [98.03, 69.47], [97.5, 69.25], [97.25, 69.35], [97.0, 69.25], [96.7, 69.38], [96.53, 68.97], [96.0, 68.75], [95.75, 68.85], [95.5, 68.75], [95.25, 68.85], [95.0, 68.75], [94.47, 68.97]]]]}, "2021-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.47, 68.97], [94.25, 69.5], [94.47, 70.03], [95.0, 70.25], [95.25, 70.15], [95.5, 70.25], [95.75, 70.15], [96.0, 70.25], [96.25, 70.15], [96.32, 70.18], [96.47, 70.53], [97.0, 70.75], [97.25, 70.65], [97.5, 70.75], [97.75, 70.65], [98.0, 70.75], [98.25, 70.65], [98.5, 70.75], [98.75, 70.65], [99.0, 70.75], [99.25, 70.65], [99.5, 70.75], [99.75, 70.65], [100.0, 70.75], [100.25, 70.65], [100.32, 70.68], [100.47, 71.03], [101.0, 71.25], [101.25, 71.15], [101.5, 71.25], [101.75, 71.15], [102.0, 71.25], [102.53, 71.03], [102.75, 70.5], [102.53, 69.97], [102.13, 69.8], [102.25, 69.5], [102.15, 69.25], [102.18, 69.18], [102.25, 69.15], [102.5, 69.25], [102.75, 69.15], [103.0, 69.25], [103.25, 69.15], [103.5, 69.25], [103.75, 69.15], [104.0, 69.25], [104.53, 69.03], [104.75, 68.5], [104.53, 67.97], [104.0, 67.75], [103.75, 67.85], [103.5, 67.75], [103.25, 67.85], [103.18, 67.82], [103.03, 67.47], [102.68, 67.32], [102.53, 66.97], [102.0, 66.75], [101.75, 66.85], [101.5, 66.75], [101.25, 66.85], [101.0, 66.75], [100.47, 66.97], [100.32, 67.32], [99.97, 67.47], [99.82, 67.82], [99.47, 67.97], [99.32, 68.32], [99.25, 68.35], [99.0, 68.25], [98.75, 68.35], [98.5, 68.25], [98.25, 68.35], [98.0, 68.25], [97.75, 68.35], [97.5, 68.25], [96.97, 68.47], [96.82, 68.82], [96.75, 68.85], [96.5, 68.75], [96.25, 68.85], [96.0, 68.75], [95.75, 68.85], [95.5, 68.75], [95.25, 68.85], [95.0, 68.75], [94.47, 68.97]]]]}, "2021-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.47, 68.97], [94.25, 69.5], [94.47, 70.03], [95.0, 70.25], [95.25, 70.15], [95.5, 70.25], [95.75, 70.15], [96.0, 70.25], [96.25, 70.15], [96.32, 70.18], [96.47, 70.53], [97.0, 70.75], [97.25, 70.65], [97.5, 70.75], [97.75, 70.65], [98.0, 70.75], [98.25, 70.65], [98.5, 70.75], [98.75, 70.65], [99.0, 70.75], [99.25, 70.65], [99.5, 70.75], [99.75, 70.65], [100.0, 70.75], [100.25, 70.65], [100.32, 70.68], [100.47, 71.03], [101.0, 71.25], [101.25, 71.15], [101.5, 71.25], [101.75, 71.15], [102.0, 71.25], [102.53, 71.03], [102.75, 70.5], [102.53, 69.97], [102.13, 69.8], [102.25, 69.5], [102.15, 69.25], [102.18, 69.18], [102.25, 69.15], [102.5, 69.25], [102.75, 69.15], [103.0, 69.25], [103.25, 69.15], [103.5, 69.25], [103.75, 69.15], [104.0, 69.25], [104.53, 69.03], [104.75, 68.5], [104.53, 67.97], [104.0, 67.75], [103.75, 67.85], [103.5, 67.75], [103.25, 67.85], [103.18, 67.82], [103.03, 67.47], [102.68, 67.32], [102.53, 66.97], [102.0, 66.75], [101.75, 66.85], [101.5, 66.75], [101.25, 66.85], [101.0, 66.75], [100.47, 66.97], [100.32, 67.32], [99.97, 67.47], [99.82, 67.82], [99.47, 67.97], [99.32, 68.32], [99.25, 68.35], [99.0, 68.25], [98.75, 68.35], [98.5, 68.25], [98.25, 68.35], [98.0, 68.25], [97.75, 68.35], [97.5, 68.25], [96.97, 68.47], [96.82, 68.82], [96.75, 68.85], [96.5, 68.75], [96.25, 68.85], [96.0, 68.75], [95.75, 68.85], [95.5, 68.75], [95.25, 68.85], [95.0, 68.75], [94.47, 68.97]]]]}, "2021-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.47, 68.97], [94.25, 69.5], [94.47, 70.03], [95.0, 70.25], [95.25, 70.15], [95.5, 70.25], [95.75, 70.15], [96.0, 70.25], [96.25, 70.15], [96.32, 70.18], [96.47, 70.53], [97.0, 70.75], [97.25, 70.65], [97.5, 70.75], [97.75, 70.65], [98.0, 70.75], [98.25, 70.65], [98.5, 70.75], [98.75, 70.65], [99.0, 70.75], [99.25, 70.65], [99.5, 70.75], [99.75, 70.65], [100.0, 70.75], [100.25, 70.65], [100.32, 70.68], [100.47, 71.03], [101.0, 71.25], [101.25, 71.15], [101.5, 71.25], [101.75, 71.15], [102.0, 71.25], [102.53, 71.03], [102.75, 70.5], [102.53, 69.97], [102.13, 69.8], [102.25, 69.5], [102.15, 69.25], [102.18, 69.18], [102.25, 69.15], [102.5, 69.25], [102.75, 69.15], [103.0, 69.25], [103.25, 69.15], [103.5, 69.25], [103.75, 69.15], [104.0, 69.25], [104.53, 69.03], [104.75, 68.5], [104.53, 67.97], [104.0, 67.75], [103.75, 67.85], [103.5, 67.75], [103.25, 67.85], [103.18, 67.82], [103.03, 67.47], [102.68, 67.32], [102.53, 66.97], [102.0, 66.75], [101.75, 66.85], [101.5, 66.75], [101.25, 66.85], [101.0, 66.75], [100.47, 66.97], [100.32, 67.32], [99.97, 67.47], [99.82, 67.82], [99.47, 67.97], [99.32, 68.32], [99.25, 68.35], [99.0, 68.25], [98.75, 68.35], [98.5, 68.25], [98.25, 68.35], [98.0, 68.25], [97.75, 68.35], [97.5, 68.25], [96.97, 68.47], [96.82, 68.82], [96.75, 68.85], [96.5, 68.75], [96.25, 68.85], [96.0, 68.75], [95.75, 68.85], [95.5, 68.75], [95.25, 68.85], [95.0, 68.75], [94.47, 68.97]]]]}, "2021-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.47, 69.47], [96.25, 70.0], [96.47, 70.53], [97.0, 70.75], [97.25, 70.65], [97.5, 70.75], [97.75, 70.65], [98.0, 70.75], [98.25, 70.65], [98.5, 70.75], [98.75, 70.65], [99.0, 70.75], [99.25, 70.65], [99.5, 70.75], [99.75, 70.65], [100.0, 70.75], [100.53, 70.53], [100.68, 70.18], [100.75, 70.15], [101.0, 70.25], [101.53, 70.03], [101.75, 69.5], [101.53, 68.97], [101.18, 68.82], [101.03, 68.47], [100.5, 68.25], [100.25, 68.35], [100.0, 68.25], [99.75, 68.35], [99.5, 68.25], [98.97, 68.47], [98.82, 68.82], [98.75, 68.85], [98.5, 68.75], [98.25, 68.85], [98.0, 68.75], [97.47, 68.97], [97.32, 69.32], [97.25, 69.35], [97.0, 69.25], [96.47, 69.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -19.57228952292334}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -12.714286928141844}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-38.08956204770328, -41.442209075491064, -44.25971682299601, -44.11076414638768, -40.3520915275478]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-39.489970832328254, -44.19412564332501, -48.1223784693465, -49.86775949220748, -43.305065751605525]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.7382650139784, -11.139348920368151, -14.079759090389333, -13.912552204634697, -10.611789538845334]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.468721019936112, -14.102343789649467, -16.54114501807524, -19.57228952292334, -12.866020837522456]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4980371108205623, -1.60881727879881, -2.004212699323822, -1.9393559523734407, -1.4983995620741313]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5741378377593755, -2.0113625084762163, -2.349904560707637, -2.619302500462641, -1.6970008742486113]}}