{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:39.665473", "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-02_to_2025-Nov-04_104.5_24.5"}, "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": 2025110000121}, "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 02 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 04 2025"}, "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": 73138.36685081}, "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"]}, "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": 24.5}, "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": 104.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "104.5\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": 109.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[103.75, 24.5], [103.97, 25.03], [104.5, 25.25], [104.75, 25.15], [104.82, 25.18], [104.97, 25.53], [105.5, 25.75], [105.75, 25.65], [106.0, 25.75], [106.25, 25.65], [106.5, 25.75], [106.75, 25.65], [106.82, 25.68], [106.97, 26.03], [107.5, 26.25], [107.75, 26.15], [108.0, 26.25], [108.25, 26.15], [108.5, 26.25], [109.03, 26.03], [109.25, 25.5], [109.04, 25.0], [109.18, 24.68], [109.53, 24.53], [109.75, 24.0], [109.65, 23.75], [109.75, 23.5], [109.53, 22.97], [109.0, 22.75], [108.5, 22.96], [108.0, 22.75], [107.7, 22.88], [107.53, 22.47], [107.0, 22.25], [106.47, 22.47], [106.25, 23.0], [106.35, 23.25], [106.25, 23.5], [106.38, 23.8], [106.25, 23.85], [106.0, 23.75], [105.75, 23.85], [105.5, 23.75], [105.25, 23.85], [105.0, 23.75], [104.75, 23.85], [104.5, 23.75], [103.97, 23.97], [103.75, 24.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.5, 23.75], [103.97, 23.97], [103.75, 24.5], [103.97, 25.03], [104.5, 25.25], [104.75, 25.15], [104.82, 25.18], [104.97, 25.53], [105.5, 25.75], [105.75, 25.65], [106.0, 25.75], [106.25, 25.65], [106.5, 25.75], [106.75, 25.65], [106.82, 25.68], [106.97, 26.03], [107.5, 26.25], [107.75, 26.15], [108.0, 26.25], [108.25, 26.15], [108.5, 26.25], [109.03, 26.03], [109.25, 25.5], [109.04, 25.0], [109.18, 24.68], [109.53, 24.53], [109.75, 24.0], [109.65, 23.75], [109.75, 23.5], [109.53, 22.97], [109.0, 22.75], [108.5, 22.96], [108.0, 22.75], [107.7, 22.88], [107.53, 22.47], [107.0, 22.25], [106.47, 22.47], [106.25, 23.0], [106.35, 23.25], [106.25, 23.5], [106.38, 23.8], [106.25, 23.85], [106.0, 23.75], [105.75, 23.85], [105.5, 23.75], [105.25, 23.85], [105.0, 23.75], [104.75, 23.85], [104.5, 23.75]]]]}, "2025-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.5, 23.75], [103.97, 23.97], [103.75, 24.5], [103.97, 25.03], [104.5, 25.25], [104.75, 25.15], [104.82, 25.18], [104.97, 25.53], [105.5, 25.75], [105.75, 25.65], [106.0, 25.75], [106.25, 25.65], [106.5, 25.75], [106.75, 25.65], [106.82, 25.68], [106.97, 26.03], [107.5, 26.25], [107.75, 26.15], [108.0, 26.25], [108.25, 26.15], [108.5, 26.25], [109.03, 26.03], [109.25, 25.5], [109.04, 25.0], [109.18, 24.68], [109.53, 24.53], [109.75, 24.0], [109.65, 23.75], [109.75, 23.5], [109.53, 22.97], [109.0, 22.75], [108.5, 22.96], [108.0, 22.75], [107.7, 22.88], [107.53, 22.47], [107.0, 22.25], [106.47, 22.47], [106.25, 23.0], [106.35, 23.25], [106.25, 23.5], [106.38, 23.8], [106.25, 23.85], [106.0, 23.75], [105.75, 23.85], [105.5, 23.75], [105.25, 23.85], [105.0, 23.75], [104.75, 23.85], [104.5, 23.75]]]]}, "2025-11-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.5, 23.75], [103.97, 23.97], [103.75, 24.5], [103.97, 25.03], [104.5, 25.25], [104.75, 25.15], [104.82, 25.18], [104.97, 25.53], [105.5, 25.75], [105.75, 25.65], [106.0, 25.75], 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mean t2m.", "value": [14.321743950477071, 13.492092582507041, 14.4046156076285]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.838348642985068, 10.528970336914085, 11.557688649495446]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.4416815152045634, -4.309886467128679, -3.419428842262516]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.269283918951203, -5.082848620935863, -4.629637730193622]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.424598593336956, -1.8427098061239537, -1.45664272061981]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.762049501648541, -2.1173715896985152, -1.804514468681844]}}