{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:24.638717", "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": "2023-Apr-15_to_2023-Apr-17_101.0_62.5"}, "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": 2023040000608}, "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": "April 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 17 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 70215.15489005964}, "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": 62.5}, "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": 101.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "101.0\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": 106.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 63.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[101.0, 63.25], [101.25, 63.15], [101.32, 63.18], [101.47, 63.53], [102.0, 63.75], [102.25, 63.65], [102.5, 63.75], [103.03, 63.53], [103.18, 63.18], [103.25, 63.15], [103.5, 63.25], [103.75, 63.15], [103.82, 63.18], [103.97, 63.53], [104.32, 63.68], [104.47, 64.03], [105.0, 64.25], [105.25, 64.15], [105.5, 64.25], [106.03, 64.03], [106.18, 63.68], [106.53, 63.53], [106.75, 63.0], [106.65, 62.75], [106.75, 62.5], [106.53, 61.97], [106.18, 61.82], [106.03, 61.47], [105.68, 61.32], [105.65, 61.25], [105.75, 61.0], [105.53, 60.47], [105.18, 60.32], [105.15, 60.25], [105.25, 60.0], [105.03, 59.47], [104.68, 59.32], [104.65, 59.25], [104.75, 59.0], [104.53, 58.47], [104.0, 58.25], [103.47, 58.47], [103.25, 59.0], [103.35, 59.25], [103.32, 59.32], [102.97, 59.47], [102.82, 59.82], [102.47, 59.97], [102.32, 60.32], [101.97, 60.47], [101.75, 61.0], [101.85, 61.25], [101.82, 61.32], [101.75, 61.35], [101.5, 61.25], [101.25, 61.35], [101.0, 61.25], [100.47, 61.47], [100.25, 62.0], [100.35, 62.25], [100.25, 62.5], [100.47, 63.03], [101.0, 63.25]]]]}}, "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": {"2023-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.25, 62.5], [100.47, 63.03], [101.0, 63.25], [101.25, 63.15], [101.32, 63.18], [101.47, 63.53], [102.0, 63.75], [102.25, 63.65], [102.5, 63.75], [103.03, 63.53], [103.18, 63.18], [103.25, 63.15], [103.5, 63.25], [103.75, 63.15], [103.82, 63.18], [103.97, 63.53], [104.32, 63.68], [104.47, 64.03], [105.0, 64.25], [105.25, 64.15], [105.5, 64.25], [106.03, 64.03], [106.18, 63.68], [106.53, 63.53], [106.75, 63.0], [106.65, 62.75], [106.75, 62.5], [106.53, 61.97], [106.18, 61.82], [106.03, 61.47], [105.68, 61.32], [105.65, 61.25], [105.75, 61.0], [105.53, 60.47], [105.18, 60.32], [105.15, 60.25], [105.25, 60.0], [105.03, 59.47], [104.68, 59.32], [104.65, 59.25], [104.75, 59.0], [104.53, 58.47], [104.0, 58.25], [103.47, 58.47], [103.25, 59.0], [103.35, 59.25], [103.32, 59.32], [102.97, 59.47], [102.82, 59.82], [102.47, 59.97], [102.32, 60.32], [101.97, 60.47], [101.75, 61.0], [101.85, 61.25], [101.82, 61.32], [101.75, 61.35], [101.5, 61.25], [101.25, 61.35], [101.0, 61.25], [100.47, 61.47], [100.25, 62.0], [100.35, 62.25], [100.25, 62.5]]]]}, "2023-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.25, 62.5], [100.47, 63.03], [101.0, 63.25], [101.25, 63.15], [101.32, 63.18], [101.47, 63.53], [102.0, 63.75], [102.25, 63.65], [102.5, 63.75], [103.03, 63.53], [103.18, 63.18], [103.25, 63.15], [103.5, 63.25], [103.75, 63.15], [103.82, 63.18], [103.97, 63.53], [104.32, 63.68], [104.47, 64.03], [105.0, 64.25], [105.25, 64.15], [105.5, 64.25], [106.03, 64.03], [106.18, 63.68], [106.53, 63.53], [106.75, 63.0], [106.65, 62.75], [106.75, 62.5], [106.53, 61.97], [106.18, 61.82], [106.03, 61.47], [105.68, 61.32], [105.65, 61.25], [105.75, 61.0], [105.53, 60.47], [105.18, 60.32], [105.15, 60.25], [105.25, 60.0], [105.03, 59.47], [104.68, 59.32], [104.65, 59.25], [104.75, 59.0], [104.53, 58.47], [104.0, 58.25], [103.47, 58.47], [103.25, 59.0], [103.35, 59.25], [103.32, 59.32], [102.97, 59.47], [102.82, 59.82], [102.47, 59.97], [102.32, 60.32], [101.97, 60.47], [101.75, 61.0], [101.85, 61.25], [101.82, 61.32], [101.75, 61.35], [101.5, 61.25], [101.25, 61.35], [101.0, 61.25], [100.47, 61.47], [100.25, 62.0], [100.35, 62.25], [100.25, 62.5]]]]}, "2023-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.25, 62.5], [100.47, 63.03], [101.0, 63.25], [101.25, 63.15], [101.32, 63.18], [101.47, 63.53], [102.0, 63.75], [102.25, 63.65], [102.5, 63.75], [103.03, 63.53], [103.18, 63.18], [103.25, 63.15], [103.5, 63.25], [103.75, 63.15], [103.82, 63.18], [103.97, 63.53], [104.32, 63.68], [104.47, 64.03], [105.0, 64.25], [105.25, 64.15], [105.5, 64.25], [106.03, 64.03], [106.18, 63.68], [106.53, 63.53], [106.75, 63.0], [106.65, 62.75], [106.75, 62.5], [106.53, 61.97], [106.18, 61.82], [106.03, 61.47], [105.68, 61.32], [105.65, 61.25], [105.75, 61.0], [105.53, 60.47], [105.18, 60.32], [105.15, 60.25], [105.25, 60.0], [105.03, 59.47], [104.68, 59.32], [104.65, 59.25], [104.75, 59.0], [104.53, 58.47], [104.0, 58.25], [103.47, 58.47], [103.25, 59.0], [103.35, 59.25], [103.32, 59.32], [102.97, 59.47], [102.82, 59.82], [102.47, 59.97], [102.32, 60.32], [101.97, 60.47], [101.75, 61.0], [101.85, 61.25], [101.82, 61.32], [101.75, 61.35], [101.5, 61.25], [101.25, 61.35], [101.0, 61.25], [100.47, 61.47], [100.25, 62.0], [100.35, 62.25], [100.25, 62.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.82880274431551}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.281606990053522}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-13.845492748583581, -15.1731466221554, -9.97656256042643]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-17.355163707130373, -17.49592413697451, -11.764563502423925]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.598163095215527, -11.465881026998565, -6.780776847946466]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.388837255936267, -12.82880274431551, -7.443688998916571]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9035757396001578, -2.3813176081076723, -1.4555792935575946]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4431127423453978, -2.5240208926448173, -1.674447563882463]}}