{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:56.957216", "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": "2025-Mar-26_to_2025-Mar-29_113.5_46.5"}, "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": 2025030000680}, "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": "March 26 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 29 2025"}, "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": 63418.032064330095}, "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": ["Mongolia"]}, "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": 46.5}, "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": 113.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "113.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 111.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[111.25, 48.15], [111.5, 48.25], [111.75, 48.15], [112.0, 48.25], [112.25, 48.15], [112.5, 48.25], [112.75, 48.15], [113.0, 48.25], [113.25, 48.15], [113.5, 48.25], [113.75, 48.15], [114.0, 48.25], [114.25, 48.15], [114.5, 48.25], [115.03, 48.03], [115.18, 47.68], [115.25, 47.65], [115.5, 47.75], [116.03, 47.53], [116.25, 47.0], [116.15, 46.75], [116.25, 46.5], [116.03, 45.97], [115.5, 45.75], [115.25, 45.85], [115.18, 45.82], [115.03, 45.47], [114.5, 45.25], [114.25, 45.35], [114.0, 45.25], [113.75, 45.35], [113.5, 45.25], [113.25, 45.35], [113.0, 45.25], [112.75, 45.35], [112.5, 45.25], [111.97, 45.47], [111.75, 46.0], [111.85, 46.25], [111.82, 46.32], [111.75, 46.35], [111.5, 46.25], [111.25, 46.35], [111.0, 46.25], [110.47, 46.47], [110.25, 47.0], [110.35, 47.25], [110.25, 47.5], [110.47, 48.03], [111.0, 48.25], [111.25, 48.15]]]]}}, "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": {"2025-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 47.03], [113.5, 47.25], [114.03, 47.03], [114.25, 46.5], [114.03, 45.97], [113.5, 45.75], [112.97, 45.97], [112.75, 46.5], [112.97, 47.03]]]]}, "2025-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.25, 47.5], [110.47, 48.03], [111.0, 48.25], [111.25, 48.15], [111.5, 48.25], [111.75, 48.15], [112.0, 48.25], [112.25, 48.15], [112.5, 48.25], [112.75, 48.15], [113.0, 48.25], [113.25, 48.15], [113.5, 48.25], [113.75, 48.15], [114.0, 48.25], [114.25, 48.15], [114.5, 48.25], [115.03, 48.03], [115.18, 47.68], [115.25, 47.65], [115.5, 47.75], [116.03, 47.53], [116.25, 47.0], [116.15, 46.75], [116.25, 46.5], [116.03, 45.97], [115.5, 45.75], [115.25, 45.85], [115.18, 45.82], [115.03, 45.47], [114.5, 45.25], [114.25, 45.35], [114.0, 45.25], [113.75, 45.35], [113.5, 45.25], [113.25, 45.35], [113.0, 45.25], [112.75, 45.35], [112.5, 45.25], [111.97, 45.47], [111.75, 46.0], [111.85, 46.25], [111.82, 46.32], [111.75, 46.35], [111.5, 46.25], [111.25, 46.35], [111.0, 46.25], [110.47, 46.47], [110.25, 47.0], [110.35, 47.25], [110.25, 47.5]]]]}, "2025-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.25, 47.5], [110.47, 48.03], [111.0, 48.25], [111.25, 48.15], [111.5, 48.25], [111.75, 48.15], [112.0, 48.25], [112.25, 48.15], [112.5, 48.25], [112.75, 48.15], [113.0, 48.25], [113.25, 48.15], [113.5, 48.25], [113.75, 48.15], [114.0, 48.25], [114.25, 48.15], [114.5, 48.25], [115.03, 48.03], [115.18, 47.68], [115.25, 47.65], [115.5, 47.75], [116.03, 47.53], [116.25, 47.0], [116.15, 46.75], [116.25, 46.5], [116.03, 45.97], [115.5, 45.75], [115.25, 45.85], [115.18, 45.82], [115.03, 45.47], [114.5, 45.25], [114.25, 45.35], [114.0, 45.25], [113.75, 45.35], [113.5, 45.25], [113.25, 45.35], [113.0, 45.25], [112.75, 45.35], [112.5, 45.25], [111.97, 45.47], [111.75, 46.0], [111.85, 46.25], [111.82, 46.32], [111.75, 46.35], [111.5, 46.25], [111.25, 46.35], [111.0, 46.25], [110.47, 46.47], [110.25, 47.0], [110.35, 47.25], [110.25, 47.5]]]]}, "2025-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.25, 47.5], [110.47, 48.03], [111.0, 48.25], [111.25, 48.15], [111.5, 48.25], [111.75, 48.15], [112.0, 48.25], [112.25, 48.15], [112.5, 48.25], [112.75, 48.15], [113.0, 48.25], [113.25, 48.15], [113.5, 48.25], [113.75, 48.15], [114.0, 48.25], [114.25, 48.15], [114.5, 48.25], [115.03, 48.03], [115.18, 47.68], [115.25, 47.65], [115.5, 47.75], [116.03, 47.53], [116.25, 47.0], [116.15, 46.75], [116.25, 46.5], [116.03, 45.97], [115.5, 45.75], [115.25, 45.85], [115.18, 45.82], [115.03, 45.47], [114.5, 45.25], [114.25, 45.35], [114.0, 45.25], [113.75, 45.35], [113.5, 45.25], [113.25, 45.35], [113.0, 45.25], [112.75, 45.35], [112.5, 45.25], [111.97, 45.47], [111.75, 46.0], [111.85, 46.25], [111.82, 46.32], [111.75, 46.35], [111.5, 46.25], [111.25, 46.35], [111.0, 46.25], [110.47, 46.47], [110.25, 47.0], [110.35, 47.25], [110.25, 47.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.723203299176305}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.53037021237626}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-8.399613444010413, -10.483043691847058, -12.314279259575699, -9.670735698276076]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.399613444010413, -13.319282277425089, -14.432084147135413, -11.801896158854163]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.7142815748976545, -8.870649912661257, -11.071631184023659, -8.742699161693155]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.7142815748976545, -11.216693072844464, -12.723203299176305, -10.945432790894927]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.347026425309713, -1.7121120729801182, -2.1342183134443555, -1.752992770174638]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.347026425309713, -2.151475383225506, -2.4151959371135865, -2.182977585342137]}}