{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:27:12.912883", "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-Sep-05_to_2021-Sep-08_109.0_52.5"}, "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": 2021090000237}, "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 05 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 08 2021"}, "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": 54926.9738475416}, "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": 52.5}, "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": 109.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "109.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 104.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 109.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.75, 51.5], [103.97, 52.03], [104.5, 52.25], [104.75, 52.15], [104.82, 52.18], [104.97, 52.53], [105.5, 52.75], [105.75, 52.65], [106.0, 52.75], [106.53, 52.53], [106.75, 52.0], [106.53, 51.47], [106.18, 51.32], [106.03, 50.97], [105.5, 50.75], [105.25, 50.85], [105.0, 50.75], [104.75, 50.85], [104.5, 50.75], [103.97, 50.97], [103.75, 51.5]]], [[[106.75, 54.0], [106.97, 54.53], [107.5, 54.75], [108.03, 54.53], [108.18, 54.18], [108.25, 54.15], [108.5, 54.25], [108.75, 54.15], [109.0, 54.25], [109.53, 54.03], [109.75, 53.5], [109.65, 53.25], [109.75, 53.0], [109.65, 52.75], [109.68, 52.68], [110.03, 52.53], [110.25, 52.0], [110.03, 51.47], [109.68, 51.32], [109.53, 50.97], [109.0, 50.75], [108.75, 50.85], [108.68, 50.82], [108.53, 50.47], [108.0, 50.25], [107.75, 50.35], [107.5, 50.25], [106.97, 50.47], [106.75, 51.0], [106.97, 51.53], [107.32, 51.68], [107.35, 51.75], [107.25, 52.0], [107.35, 52.25], [107.32, 52.32], [106.97, 52.47], [106.75, 53.0], [106.85, 53.25], [106.75, 53.5], [106.85, 53.75], [106.75, 54.0]]]]}, "2021-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.97, 50.97], [103.75, 51.5], [103.97, 52.03], [104.5, 52.25], [104.75, 52.15], [104.82, 52.18], [104.97, 52.53], [105.5, 52.75], [105.75, 52.65], [106.0, 52.75], [106.53, 52.53], [106.68, 52.18], [106.75, 52.15], [107.0, 52.25], [107.25, 52.15], [107.32, 52.18], [107.35, 52.25], [107.32, 52.32], [106.97, 52.47], [106.75, 53.0], [106.85, 53.25], [106.75, 53.5], [106.85, 53.75], [106.75, 54.0], [106.97, 54.53], [107.5, 54.75], [108.03, 54.53], [108.18, 54.18], [108.25, 54.15], [108.5, 54.25], [108.75, 54.15], [109.0, 54.25], [109.53, 54.03], [109.75, 53.5], [109.65, 53.25], [109.75, 53.0], [109.65, 52.75], [109.68, 52.68], [110.03, 52.53], [110.25, 52.0], [110.03, 51.47], [109.68, 51.32], [109.53, 50.97], [109.0, 50.75], [108.75, 50.85], [108.68, 50.82], [108.53, 50.47], [108.0, 50.25], [107.75, 50.35], [107.5, 50.25], [107.25, 50.35], [107.0, 50.25], [106.47, 50.47], [106.32, 50.82], [106.0, 50.96], [105.5, 50.75], [105.25, 50.85], [105.0, 50.75], [104.75, 50.85], [104.5, 50.75], [103.97, 50.97]]]]}, "2021-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.97, 50.97], [103.75, 51.5], [103.97, 52.03], [104.5, 52.25], [104.75, 52.15], [104.82, 52.18], [104.97, 52.53], [105.5, 52.75], [105.75, 52.65], [106.0, 52.75], [106.53, 52.53], [106.68, 52.18], [106.75, 52.15], [107.0, 52.25], [107.25, 52.15], [107.32, 52.18], [107.35, 52.25], [107.32, 52.32], [106.97, 52.47], [106.75, 53.0], [106.85, 53.25], [106.75, 53.5], [106.85, 53.75], [106.75, 54.0], [106.97, 54.53], [107.5, 54.75], [108.03, 54.53], [108.18, 54.18], [108.25, 54.15], [108.5, 54.25], [108.75, 54.15], [109.0, 54.25], [109.53, 54.03], [109.75, 53.5], [109.65, 53.25], [109.75, 53.0], [109.65, 52.75], [109.68, 52.68], [110.03, 52.53], [110.25, 52.0], [110.03, 51.47], [109.68, 51.32], [109.53, 50.97], [109.0, 50.75], [108.75, 50.85], [108.68, 50.82], [108.53, 50.47], [108.0, 50.25], [107.75, 50.35], [107.5, 50.25], [107.25, 50.35], [107.0, 50.25], [106.47, 50.47], [106.32, 50.82], [106.0, 50.96], [105.5, 50.75], [105.25, 50.85], [105.0, 50.75], [104.75, 50.85], [104.5, 50.75], [103.97, 50.97]]]]}, "2021-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.75, 51.5], [105.97, 52.03], [106.5, 52.25], [106.75, 52.15], [107.0, 52.25], [107.25, 52.15], [107.32, 52.18], [107.47, 52.53], [107.82, 52.68], [107.85, 52.75], [107.75, 53.0], [107.93, 53.43], [107.5, 53.25], [106.97, 53.47], [106.75, 54.0], [106.97, 54.53], [107.5, 54.75], [108.03, 54.53], [108.25, 54.0], [108.07, 53.57], [108.5, 53.75], [108.75, 53.65], [109.0, 53.75], [109.53, 53.53], [109.75, 53.0], [109.65, 52.75], [109.68, 52.68], [110.03, 52.53], [110.25, 52.0], [110.03, 51.47], [109.68, 51.32], [109.53, 50.97], [109.0, 50.75], [108.75, 50.85], [108.68, 50.82], [108.53, 50.47], [108.0, 50.25], [107.75, 50.35], [107.5, 50.25], [107.25, 50.35], [107.0, 50.25], [106.47, 50.47], [106.32, 50.82], [105.97, 50.97], [105.75, 51.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.478406553548439}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.11168938403185}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.329354415185094, 6.314852742398045, 6.715669118927622, 4.995843663963171]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.175088068046989, 2.5153742180348786, 2.6355282869373013, 2.3656702219720387]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.758357590766159, -5.55337999259177, -4.903617975393896, -5.232768091908631]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.593925429961928, -6.478406553548439, -5.612960876655393, -5.587490261646963]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6299651083819713, -1.8394419849287715, -1.5828955044397008, -1.5484292864165867]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9574568667409333, -2.264925968001029, -1.8214084872834153, -1.656063809764559]}}