{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:53.414636", "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": "2024-Mar-29_to_2024-Mar-31_119.5_49.5"}, "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": 2024030000623}, "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 29 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 31 2024"}, "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": 53608.16882444133}, "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": ["China", "Mongolia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 49.5}, "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": 119.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "119.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 118.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 120.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[117.25, 49.0], [117.47, 49.53], [118.0, 49.75], [118.25, 49.65], [118.32, 49.68], [118.47, 50.03], [118.82, 50.18], [118.97, 50.53], [119.5, 50.75], [120.03, 50.53], [120.18, 50.18], [120.53, 50.03], [120.75, 49.5], [120.65, 49.25], [120.75, 49.0], [120.53, 48.47], [120.18, 48.32], [120.15, 48.25], [120.18, 48.18], [120.53, 48.03], [120.68, 47.68], [121.03, 47.53], [121.25, 47.0], [121.15, 46.75], [121.25, 46.5], [121.03, 45.97], [120.5, 45.75], [120.25, 45.85], [120.0, 45.75], [119.47, 45.97], [119.3, 46.38], [119.0, 46.25], [118.75, 46.35], [118.5, 46.25], [117.97, 46.47], [117.82, 46.82], [117.47, 46.97], [117.25, 47.5], [117.35, 47.75], [117.25, 48.0], [117.46, 48.5], [117.25, 49.0]]]]}}, "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": {"2024-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.25, 48.0], [117.46, 48.5], [117.25, 49.0], [117.47, 49.53], [118.0, 49.75], [118.25, 49.65], [118.32, 49.68], [118.47, 50.03], [118.82, 50.18], [118.97, 50.53], [119.5, 50.75], [120.03, 50.53], [120.18, 50.18], [120.53, 50.03], [120.75, 49.5], [120.65, 49.25], [120.75, 49.0], [120.53, 48.47], [120.18, 48.32], [120.15, 48.25], [120.18, 48.18], [120.53, 48.03], [120.68, 47.68], [121.03, 47.53], [121.25, 47.0], [121.15, 46.75], [121.25, 46.5], [121.03, 45.97], [120.5, 45.75], [120.25, 45.85], [120.0, 45.75], [119.47, 45.97], [119.3, 46.38], [119.0, 46.25], [118.75, 46.35], [118.5, 46.25], [117.97, 46.47], [117.82, 46.82], [117.47, 46.97], [117.25, 47.5], [117.35, 47.75], [117.25, 48.0]]]]}, "2024-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.25, 48.0], [117.46, 48.5], [117.25, 49.0], [117.47, 49.53], [118.0, 49.75], [118.25, 49.65], [118.32, 49.68], [118.47, 50.03], [118.82, 50.18], [118.97, 50.53], [119.5, 50.75], [120.03, 50.53], [120.18, 50.18], [120.53, 50.03], [120.75, 49.5], [120.65, 49.25], [120.75, 49.0], [120.53, 48.47], [120.18, 48.32], [120.15, 48.25], [120.18, 48.18], [120.53, 48.03], [120.68, 47.68], [121.03, 47.53], [121.25, 47.0], [121.15, 46.75], [121.25, 46.5], [121.03, 45.97], [120.5, 45.75], [120.25, 45.85], [120.0, 45.75], [119.47, 45.97], [119.3, 46.38], [119.0, 46.25], [118.75, 46.35], [118.5, 46.25], [117.97, 46.47], [117.82, 46.82], [117.47, 46.97], [117.25, 47.5], [117.35, 47.75], [117.25, 48.0]]]]}, "2024-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.25, 48.0], [117.46, 48.5], [117.25, 49.0], [117.47, 49.53], [118.0, 49.75], [118.25, 49.65], [118.32, 49.68], [118.47, 50.03], [118.82, 50.18], [118.97, 50.53], [119.5, 50.75], [120.03, 50.53], [120.18, 50.18], [120.53, 50.03], [120.75, 49.5], [120.65, 49.25], [120.75, 49.0], [120.53, 48.47], [120.18, 48.32], [120.15, 48.25], [120.18, 48.18], [120.53, 48.03], [120.68, 47.68], [121.03, 47.53], [121.25, 47.0], [121.15, 46.75], [121.25, 46.5], [121.03, 45.97], [120.5, 45.75], [120.25, 45.85], [120.0, 45.75], [119.47, 45.97], [119.3, 46.38], [119.0, 46.25], [118.75, 46.35], [118.5, 46.25], [117.97, 46.47], [117.82, 46.82], [117.47, 46.97], [117.25, 47.5], [117.35, 47.75], [117.25, 48.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.982208819749474}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.584915182184119}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.106886126782854, -10.741847994219029, -10.446094213960293]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.2851562668111, -13.771107743878645, -13.35544983929691]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.07205970918279, -9.219600060651015, -9.463085776718554]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.8576480754219915, -11.098563759353056, -11.982208819749474]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4493914282248086, -1.9289685783431603, -1.9855166297271793]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5657055768683343, -2.4235577359817406, -2.511870878432135]}}