{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:00:55.405692", "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-Sep-12_to_2024-Sep-14_108.5_44.0"}, "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": 2024090000295}, "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 12 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 14 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": 58587.99017845418}, "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": 44.0}, "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": 108.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "108.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 104.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 109.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[104.97, 43.53], [105.5, 43.75], [105.75, 43.65], [105.82, 43.68], [105.97, 44.03], [106.5, 44.25], [106.75, 44.15], [106.82, 44.18], [106.97, 44.53], [107.5, 44.75], [107.75, 44.65], [108.0, 44.75], [108.25, 44.65], [108.32, 44.68], [108.47, 45.03], [109.0, 45.25], [109.25, 45.15], [109.5, 45.25], [110.03, 45.03], [110.25, 44.5], [110.15, 44.25], [110.25, 44.0], [110.03, 43.47], [109.68, 43.32], [109.53, 42.97], [109.0, 42.75], [108.75, 42.85], [108.5, 42.75], [108.25, 42.85], [108.18, 42.82], [108.03, 42.47], [107.5, 42.25], [107.25, 42.35], [107.18, 42.32], [107.03, 41.97], [106.68, 41.82], [106.53, 41.47], [106.0, 41.25], [105.75, 41.35], [105.5, 41.25], [105.25, 41.35], [105.0, 41.25], [104.75, 41.35], [104.5, 41.25], [103.97, 41.47], [103.75, 42.0], [103.97, 42.53], [104.32, 42.68], [104.47, 43.03], [104.82, 43.18], [104.97, 43.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "E.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.47, 43.03], [104.82, 43.18], [104.97, 43.53], [105.5, 43.75], [105.75, 43.65], [105.82, 43.68], [105.97, 44.03], [106.5, 44.25], [106.75, 44.15], [106.82, 44.18], [106.97, 44.53], [107.5, 44.75], [107.75, 44.65], [108.0, 44.75], [108.25, 44.65], [108.32, 44.68], [108.47, 45.03], [109.0, 45.25], [109.25, 45.15], [109.5, 45.25], [110.03, 45.03], [110.25, 44.5], [110.15, 44.25], [110.25, 44.0], [110.03, 43.47], [109.68, 43.32], [109.53, 42.97], [109.0, 42.75], [108.75, 42.85], [108.5, 42.75], [108.25, 42.85], [108.18, 42.82], [108.03, 42.47], [107.5, 42.25], [107.25, 42.35], [107.18, 42.32], [107.03, 41.97], [106.68, 41.82], [106.53, 41.47], [106.0, 41.25], [105.75, 41.35], [105.5, 41.25], [105.25, 41.35], [105.0, 41.25], [104.75, 41.35], [104.5, 41.25], [103.97, 41.47], [103.75, 42.0], [103.97, 42.53], [104.32, 42.68], [104.47, 43.03]]]]}, "2024-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.47, 43.03], [104.82, 43.18], [104.97, 43.53], [105.5, 43.75], [105.75, 43.65], [105.82, 43.68], [105.97, 44.03], [106.5, 44.25], [106.75, 44.15], [106.82, 44.18], [106.97, 44.53], [107.5, 44.75], [107.75, 44.65], [108.0, 44.75], [108.25, 44.65], [108.32, 44.68], [108.47, 45.03], [109.0, 45.25], [109.25, 45.15], [109.5, 45.25], [110.03, 45.03], [110.25, 44.5], [110.15, 44.25], [110.25, 44.0], [110.03, 43.47], [109.68, 43.32], [109.53, 42.97], [109.0, 42.75], [108.75, 42.85], [108.5, 42.75], [108.25, 42.85], [108.18, 42.82], [108.03, 42.47], [107.5, 42.25], [107.25, 42.35], [107.18, 42.32], [107.03, 41.97], [106.68, 41.82], [106.53, 41.47], [106.0, 41.25], [105.75, 41.35], [105.5, 41.25], [105.25, 41.35], [105.0, 41.25], [104.75, 41.35], [104.5, 41.25], [103.97, 41.47], [103.75, 42.0], [103.97, 42.53], [104.32, 42.68], [104.47, 43.03]]]]}, "2024-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.47, 43.03], [104.82, 43.18], [104.97, 43.53], 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"description": "Mean t2m anomaly over entire duration", "value": -6.837810450960876}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.975728998428735, 8.27959301288314, 9.81718470255538]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.15898157755538, 6.3452011108398665, 8.24443079630538]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.263906264417782, -8.564074486780072, -6.6854506016847735]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.918368539906737, -10.054265974942211, -7.427980085744878]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4708200890905063, -2.3326394402541255, -1.757353944136945]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6580209228475336, -2.6363420949872, -2.0694236193362308]}}