{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:57:41.510652", "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-Nov-15_to_2025-Nov-19_101.5_41.5"}, "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": 2025110000402}, "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": "November 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 19 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 452628.71247250366}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "E.C.Asia", "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": 41.5}, "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": 101.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "101.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 95.75}, "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": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.47, 44.47], [95.25, 45.0], [95.47, 45.53], [96.0, 45.75], [96.25, 45.65], [96.5, 45.75], [97.03, 45.53], [97.18, 45.18], [97.53, 45.03], [97.68, 44.68], [97.75, 44.65], [98.0, 44.75], [98.25, 44.65], [98.5, 44.75], [98.75, 44.65], [98.88, 44.7], [98.75, 45.0], [98.85, 45.25], [98.82, 45.32], [98.47, 45.47], [98.25, 46.0], [98.47, 46.53], [99.0, 46.75], [99.25, 46.65], [99.5, 46.75], [99.75, 46.65], [100.0, 46.75], [100.25, 46.65], [100.5, 46.75], [101.03, 46.53], [101.18, 46.18], [101.53, 46.03], [101.75, 45.5], [101.53, 44.97], [101.13, 44.8], [101.18, 44.68], [101.25, 44.65], [101.5, 44.75], [102.0, 44.54], [102.5, 44.75], [103.03, 44.53], [103.25, 44.0], [103.15, 43.75], [103.18, 43.68], [103.53, 43.53], [103.75, 43.0], [103.53, 42.47], [103.0, 42.25], [102.75, 42.35], [102.68, 42.32], [102.53, 41.97], [102.0, 41.75], [101.47, 41.97], [101.32, 42.32], [101.25, 42.35], [101.0, 42.25], [100.75, 42.35], [100.5, 42.25], [100.25, 42.35], [100.0, 42.25], [99.75, 42.35], [99.5, 42.25], [99.25, 42.35], [99.0, 42.25], [98.75, 42.35], [98.5, 42.25], [97.97, 42.47], [97.75, 43.0], [97.88, 43.3], [97.75, 43.35], [97.5, 43.25], [97.25, 43.35], [97.0, 43.25], [96.47, 43.47], [96.25, 44.0], [96.35, 44.25], [96.32, 44.32], [96.25, 44.35], [96.0, 44.25], [95.47, 44.47]]]]}, "2025-11-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.47, 44.47], [95.25, 45.0], [95.47, 45.53], [96.0, 45.75], [96.25, 45.65], [96.5, 45.75], [97.03, 45.53], [97.18, 45.18], [97.53, 45.03], [97.68, 44.68], [97.75, 44.65], [98.0, 44.75], [98.25, 44.65], [98.5, 44.75], [98.75, 44.65], [98.88, 44.7], [98.75, 45.0], [98.85, 45.25], [98.82, 45.32], [98.47, 45.47], [98.25, 46.0], [98.47, 46.53], [99.0, 46.75], [99.25, 46.65], [99.5, 46.75], [99.75, 46.65], [100.0, 46.75], [100.25, 46.65], [100.5, 46.75], [101.03, 46.53], [101.18, 46.18], [101.53, 46.03], [101.75, 45.5], [101.53, 44.97], [101.13, 44.8], [101.18, 44.68], [101.25, 44.65], [101.5, 44.75], [102.0, 44.54], [102.5, 44.75], [103.03, 44.53], [103.25, 44.0], [103.15, 43.75], [103.18, 43.68], [103.53, 43.53], [103.75, 43.0], [103.54, 42.5], [103.68, 42.18], [104.03, 42.03], [104.25, 41.5], [104.03, 40.97], [103.5, 40.75], [103.25, 40.85], [103.13, 40.8], [103.25, 40.5], [103.15, 40.25], [103.18, 40.18], [103.25, 40.15], [103.32, 40.18], [103.47, 40.53], [104.0, 40.75], [104.53, 40.53], [104.68, 40.18], [104.75, 40.15], [105.0, 40.25], [105.25, 40.15], [105.32, 40.18], [105.47, 40.53], [106.0, 40.75], [106.53, 40.53], [106.68, 40.18], [107.03, 40.03], [107.18, 39.68], [107.25, 39.65], [107.5, 39.75], [108.03, 39.53], [108.18, 39.18], [108.25, 39.15], [108.5, 39.25], [109.03, 39.03], [109.18, 38.68], [109.25, 38.65], [109.5, 38.75], [110.03, 38.53], [110.25, 38.0], [110.15, 37.75], [110.25, 37.5], [110.15, 37.25], [110.25, 37.0], [110.15, 36.75], [110.25, 36.5], [110.03, 35.97], [109.5, 35.75], [109.25, 35.85], [109.0, 35.75], [108.75, 35.85], [108.5, 35.75], [108.25, 35.85], [108.0, 35.75], [107.75, 35.85], [107.5, 35.75], [107.25, 35.85], [107.0, 35.75], [106.75, 35.85], [106.5, 35.75], [106.25, 35.85], [106.18, 35.82], [106.03, 35.47], [105.5, 35.25], [105.25, 35.35], [105.0, 35.25], [104.75, 35.35], [104.5, 35.25], [104.25, 35.35], [104.0, 35.25], [103.75, 35.35], [103.5, 35.25], [103.25, 35.35], [103.0, 35.25], [102.75, 35.35], [102.5, 35.25], [102.25, 35.35], [102.0, 35.25], [101.47, 35.47], [101.25, 36.0], [101.47, 36.53], [102.0, 36.75], [102.25, 36.65], [102.5, 36.75], [102.75, 36.65], [102.82, 36.68], [102.97, 37.03], [103.32, 37.18], [103.35, 37.25], [103.32, 37.32], [103.25, 37.35], [103.0, 37.25], [102.47, 37.47], [102.32, 37.82], [102.25, 37.85], [102.0, 37.75], [101.47, 37.97], [101.32, 38.32], [100.97, 38.47], [100.75, 39.0], [100.85, 39.25], [100.82, 39.32], [100.75, 39.35], [100.5, 39.25], [100.25, 39.35], [100.0, 39.25], [99.75, 39.35], [99.5, 39.25], [99.25, 39.35], [99.0, 39.25], [98.75, 39.35], [98.5, 39.25], [97.97, 39.47], [97.82, 39.82], [97.47, 39.97], [97.25, 40.5], [97.46, 41.0], [97.25, 41.5], [97.47, 42.03], [98.0, 42.25], [98.25, 42.15], [98.38, 42.2], [98.32, 42.32], [97.97, 42.47], [97.82, 42.82], [97.47, 42.97], [97.32, 43.32], [97.25, 43.35], [97.0, 43.25], [96.47, 43.47], [96.25, 44.0], [96.35, 44.25], [96.32, 44.32], [96.25, 44.35], [96.0, 44.25], [95.47, 44.47]], [[98.85, 40.75], [98.82, 40.82], [98.75, 40.85], [98.63, 40.8], [98.68, 40.68], [98.75, 40.65], [98.82, 40.68], [98.85, 40.75]]]]}, "2025-11-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.47, 44.47], [95.25, 45.0], [95.47, 45.53], [96.0, 45.75], [96.25, 45.65], [96.5, 45.75], [97.03, 45.53], [97.18, 45.18], [97.53, 45.03], [97.68, 44.68], [97.75, 44.65], [98.0, 44.75], [98.25, 44.65], [98.5, 44.75], [98.75, 44.65], [98.88, 44.7], [98.75, 45.0], [98.85, 45.25], [98.82, 45.32], [98.47, 45.47], [98.25, 46.0], [98.47, 46.53], [99.0, 46.75], [99.25, 46.65], [99.5, 46.75], [99.75, 46.65], [100.0, 46.75], [100.25, 46.65], [100.5, 46.75], [101.03, 46.53], [101.18, 46.18], [101.53, 46.03], [101.75, 45.5], [101.53, 44.97], [101.13, 44.8], [101.18, 44.68], [101.25, 44.65], [101.5, 44.75], [102.0, 44.54], [102.5, 44.75], [103.03, 44.53], [103.25, 44.0], [103.15, 43.75], [103.18, 43.68], [103.53, 43.53], [103.75, 43.0], [103.54, 42.5], [103.68, 42.18], [104.03, 42.03], [104.25, 41.5], [104.03, 40.97], [103.5, 40.75], [103.25, 40.85], [103.13, 40.8], [103.25, 40.5], [103.15, 40.25], [103.18, 40.18], [103.25, 40.15], [103.32, 40.18], [103.47, 40.53], [104.0, 40.75], [104.53, 40.53], [104.68, 40.18], [104.75, 40.15], [105.0, 40.25], [105.25, 40.15], [105.32, 40.18], [105.47, 40.53], [106.0, 40.75], [106.53, 40.53], [106.68, 40.18], [107.03, 40.03], [107.18, 39.68], [107.25, 39.65], [107.5, 39.75], [108.03, 39.53], [108.18, 39.18], [108.25, 39.15], [108.5, 39.25], [109.03, 39.03], [109.18, 38.68], [109.25, 38.65], [109.5, 38.75], [110.03, 38.53], [110.25, 38.0], [110.15, 37.75], [110.25, 37.5], [110.15, 37.25], [110.25, 37.0], [110.15, 36.75], [110.25, 36.5], [110.03, 35.97], [109.5, 35.75], [109.25, 35.85], [109.0, 35.75], [108.75, 35.85], [108.5, 35.75], [108.25, 35.85], [108.0, 35.75], [107.75, 35.85], [107.5, 35.75], [107.25, 35.85], [107.0, 35.75], [106.75, 35.85], [106.5, 35.75], [106.25, 35.85], [106.18, 35.82], [106.03, 35.47], [105.5, 35.25], [105.25, 35.35], [105.0, 35.25], [104.75, 35.35], [104.5, 35.25], [104.25, 35.35], [104.0, 35.25], [103.75, 35.35], [103.5, 35.25], [103.25, 35.35], [103.0, 35.25], [102.75, 35.35], [102.5, 35.25], [102.25, 35.35], [102.0, 35.25], [101.47, 35.47], [101.25, 36.0], [101.47, 36.53], [102.0, 36.75], [102.25, 36.65], [102.5, 36.75], [102.75, 36.65], [102.82, 36.68], [102.97, 37.03], [103.32, 37.18], [103.35, 37.25], [103.32, 37.32], [103.25, 37.35], [103.0, 37.25], [102.47, 37.47], [102.32, 37.82], [102.25, 37.85], [102.0, 37.75], [101.47, 37.97], [101.32, 38.32], [100.97, 38.47], [100.75, 39.0], [100.85, 39.25], [100.82, 39.32], [100.75, 39.35], [100.5, 39.25], [100.25, 39.35], [100.0, 39.25], [99.75, 39.35], [99.5, 39.25], [99.25, 39.35], [99.0, 39.25], [98.75, 39.35], [98.5, 39.25], [97.97, 39.47], [97.82, 39.82], [97.47, 39.97], [97.25, 40.5], [97.46, 41.0], [97.25, 41.5], [97.47, 42.03], [98.0, 42.25], [98.25, 42.15], [98.38, 42.2], [98.32, 42.32], [97.97, 42.47], [97.82, 42.82], [97.47, 42.97], [97.32, 43.32], [97.25, 43.35], [97.0, 43.25], [96.47, 43.47], [96.25, 44.0], [96.35, 44.25], [96.32, 44.32], [96.25, 44.35], [96.0, 44.25], [95.47, 44.47]], [[98.85, 40.75], [98.82, 40.82], [98.75, 40.85], [98.63, 40.8], [98.68, 40.68], [98.75, 40.65], [98.82, 40.68], [98.85, 40.75]]]]}, "2025-11-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[97.47, 42.03], [98.0, 42.25], [98.25, 42.15], [98.38, 42.2], [98.25, 42.5], [98.38, 42.8], [98.25, 42.85], [98.0, 42.75], [97.47, 42.97], [97.25, 43.5], [97.47, 44.03], [98.0, 44.25], [98.25, 44.15], [98.5, 44.25], [98.75, 44.15], [99.0, 44.25], [99.25, 44.15], [99.5, 44.25], [100.03, 44.03], [100.25, 43.5], [100.15, 43.25], [100.18, 43.18], [100.25, 43.15], [100.5, 43.25], [100.75, 43.15], [101.0, 43.25], [101.25, 43.15], [101.5, 43.25], [101.75, 43.15], [102.0, 43.25], [102.53, 43.03], [102.68, 42.68], [102.75, 42.65], [103.0, 42.75], [103.53, 42.53], [103.68, 42.18], [104.03, 42.03], [104.25, 41.5], [104.03, 40.97], [103.5, 40.75], [103.25, 40.85], [103.13, 40.8], [103.25, 40.5], [103.15, 40.25], [103.18, 40.18], [103.25, 40.15], [103.32, 40.18], [103.47, 40.53], [104.0, 40.75], [104.53, 40.53], [104.68, 40.18], [104.75, 40.15], [105.0, 40.25], [105.25, 40.15], [105.32, 40.18], [105.47, 40.53], [106.0, 40.75], [106.53, 40.53], [106.68, 40.18], [107.03, 40.03], [107.18, 39.68], [107.25, 39.65], [107.5, 39.75], [108.03, 39.53], [108.18, 39.18], [108.25, 39.15], [108.5, 39.25], [109.03, 39.03], [109.18, 38.68], [109.25, 38.65], [109.5, 38.75], [110.03, 38.53], [110.25, 38.0], [110.15, 37.75], [110.25, 37.5], [110.15, 37.25], [110.25, 37.0], [110.15, 36.75], [110.25, 36.5], [110.03, 35.97], [109.5, 35.75], [109.25, 35.85], [109.0, 35.75], [108.75, 35.85], [108.5, 35.75], [108.25, 35.85], [108.0, 35.75], [107.75, 35.85], [107.5, 35.75], [107.25, 35.85], [107.0, 35.75], [106.75, 35.85], [106.5, 35.75], [106.25, 35.85], [106.18, 35.82], [106.03, 35.47], [105.5, 35.25], [105.25, 35.35], [105.0, 35.25], [104.75, 35.35], [104.5, 35.25], [104.25, 35.35], [104.0, 35.25], [103.75, 35.35], [103.5, 35.25], [103.25, 35.35], [103.0, 35.25], [102.75, 35.35], [102.5, 35.25], [102.25, 35.35], [102.0, 35.25], [101.47, 35.47], [101.25, 36.0], [101.47, 36.53], [102.0, 36.75], [102.25, 36.65], [102.5, 36.75], [102.75, 36.65], [102.82, 36.68], [102.97, 37.03], [103.32, 37.18], [103.35, 37.25], [103.32, 37.32], [103.25, 37.35], [103.0, 37.25], [102.47, 37.47], [102.32, 37.82], [102.25, 37.85], [102.0, 37.75], [101.47, 37.97], [101.32, 38.32], [100.97, 38.47], [100.75, 39.0], [100.85, 39.25], [100.82, 39.32], [100.75, 39.35], [100.5, 39.25], [100.25, 39.35], [100.0, 39.25], [99.75, 39.35], [99.5, 39.25], [99.25, 39.35], [99.0, 39.25], [98.75, 39.35], [98.5, 39.25], [97.97, 39.47], [97.82, 39.82], [97.47, 39.97], [97.25, 40.5], [97.46, 41.0], [97.25, 41.5], [97.47, 42.03]], [[98.82, 40.68], [98.85, 40.75], [98.82, 40.82], [98.75, 40.85], [98.63, 40.8], [98.68, 40.68], [98.75, 40.65], [98.82, 40.68]]]]}, "2025-11-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.47, 35.47], [101.25, 36.0], [101.47, 36.53], [102.0, 36.75], [102.53, 36.53], [102.75, 36.0], [102.53, 35.47], [102.0, 35.25], [101.47, 35.47]]], [[[101.0, 43.25], [101.53, 43.03], [101.68, 42.68], [101.75, 42.65], [102.0, 42.75], [102.53, 42.53], [102.68, 42.18], [103.03, 42.03], [103.25, 41.5], [103.03, 40.97], [102.5, 40.75], [102.25, 40.85], [102.0, 40.75], [101.75, 40.85], [101.5, 40.75], [100.97, 40.97], [100.82, 41.32], [100.47, 41.47], [100.25, 42.0], [100.35, 42.25], [100.25, 42.5], [100.47, 43.03], [101.0, 43.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.615484180746137}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.506231777455733}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-11.609791371316646, -8.587977823946233, -10.045343916283684, -6.503528382762397, -7.396098836263036]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-21.243906402587868, -22.552309417724587, -19.67288754781086, -10.085767491658487, -8.3902598063151]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.952327869198868, -7.628710543429204, -8.736640095862953, -6.074942145553485, -5.099005049886863]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.731782198874214, -12.615484180746137, -11.512166807312951, -8.151975883129069, -5.894518849018482]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7449260200199426, -2.0831748805169914, -2.448216581105093, -1.7372062936959463, -1.4364242865657166]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.690011564626463, -2.8696384842503506, -3.212656085309628, -2.586280328260067, -1.6084622955136976]}}