{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:00.967873", "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-Jan-25_to_2025-Jan-29_103.5_32.0"}, "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": 2025010000670}, "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": "January 25 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 29 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": 88303.52699117952}, "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": 32.0}, "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": 103.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "103.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 101.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 105.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[103.65, 31.25], [103.75, 31.0], [103.53, 30.47], [103.0, 30.25], [102.47, 30.47], [102.3, 30.88], [102.18, 30.82], 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"polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.97, 33.53], [103.5, 33.75], [104.03, 33.53], [104.25, 33.0], [104.03, 32.47], [103.5, 32.25], [102.97, 32.47], [102.75, 33.0], [102.97, 33.53]]]]}, "2025-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.75, 31.5], [100.85, 31.75], [100.75, 32.0], [100.85, 32.25], [100.75, 32.5], [100.85, 32.75], [100.75, 33.0], [100.97, 33.53], [101.5, 33.75], [101.75, 33.65], [102.0, 33.75], [102.25, 33.65], [102.5, 33.75], [102.75, 33.65], [103.0, 33.75], [103.25, 33.65], [103.32, 33.68], [103.35, 33.75], [103.25, 34.0], [103.35, 34.25], [103.25, 34.5], [103.47, 35.03], [104.0, 35.25], [104.25, 35.15], [104.5, 35.25], [104.75, 35.15], [105.0, 35.25], [105.25, 35.15], [105.5, 35.25], [106.03, 35.03], [106.25, 34.5], [106.15, 34.25], [106.25, 34.0], [106.03, 33.47], 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amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.772974114271419}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-16.830834452311194, -18.292381686790264, -18.13018679899332, -16.58288316913672, -14.055239105224587]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-16.830834452311194, -24.452239100138314, -24.488188171386696, -22.79774640401203, -14.055239105224587]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.159931377464602, -8.269231476213218, -8.31855520980551, -6.900727043617528, -4.619909699130119]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.159931377464602, -10.597182326008124, -11.067153073859316, -9.77016129490724, -4.619909699130119]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5858550241884948, -2.2023902111923133, -2.271849965254372, -1.9049852347985856, -1.3927310273799705]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5858550241884948, -2.948229529826409, -3.316183022677797, -3.03743261783316, -1.3927310273799705]}}