{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:45.946259", "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-Mar-03_to_2025-Mar-05_111.0_28.5"}, "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": 2025030000106}, "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 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 05 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": 86677.1059187081}, "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": 28.5}, "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": 111.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "111.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 110.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 114.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[110.32, 29.68], [110.35, 29.75], [110.25, 30.0], [110.47, 30.53], [111.0, 30.75], [111.53, 30.53], [111.68, 30.18], [111.75, 30.15], [112.0, 30.25], [112.25, 30.15], [112.5, 30.25], [112.75, 30.15], [113.0, 30.25], [113.25, 30.15], [113.5, 30.25], [113.75, 30.15], [114.0, 30.25], [114.25, 30.15], [114.5, 30.25], [115.03, 30.03], [115.25, 29.5], [115.03, 28.97], [114.68, 28.82], [114.65, 28.75], [114.75, 28.5], [114.53, 27.97], [114.18, 27.82], [114.15, 27.75], [114.25, 27.5], [114.03, 26.97], [113.5, 26.75], [112.97, 26.97], [112.82, 27.32], [112.75, 27.35], [112.5, 27.25], [112.25, 27.35], [112.0, 27.25], [111.75, 27.35], [111.5, 27.25], [111.25, 27.35], [111.0, 27.25], [110.47, 27.47], [110.32, 27.82], [109.97, 27.97], [109.75, 28.5], [109.85, 28.75], [109.75, 29.0], [109.97, 29.53], [110.32, 29.68]]]]}}, "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": {"2025-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 29.0], [109.97, 29.53], [110.32, 29.68], [110.35, 29.75], [110.25, 30.0], [110.47, 30.53], [111.0, 30.75], [111.53, 30.53], [111.68, 30.18], [111.75, 30.15], [112.0, 30.25], [112.25, 30.15], [112.5, 30.25], [112.75, 30.15], [113.0, 30.25], [113.25, 30.15], [113.5, 30.25], [113.75, 30.15], [114.0, 30.25], [114.25, 30.15], [114.5, 30.25], [115.03, 30.03], [115.25, 29.5], [115.03, 28.97], [114.68, 28.82], [114.65, 28.75], [114.75, 28.5], [114.53, 27.97], [114.18, 27.82], [114.15, 27.75], [114.25, 27.5], [114.03, 26.97], [113.5, 26.75], [112.97, 26.97], [112.82, 27.32], [112.75, 27.35], [112.5, 27.25], [112.25, 27.35], [112.0, 27.25], [111.75, 27.35], [111.5, 27.25], [111.25, 27.35], [111.0, 27.25], [110.47, 27.47], [110.32, 27.82], [109.97, 27.97], [109.75, 28.5], [109.85, 28.75], [109.75, 29.0]]]]}, "2025-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 29.0], [109.97, 29.53], [110.32, 29.68], [110.35, 29.75], [110.25, 30.0], [110.47, 30.53], [111.0, 30.75], [111.53, 30.53], [111.68, 30.18], [111.75, 30.15], [112.0, 30.25], [112.25, 30.15], [112.5, 30.25], [112.75, 30.15], [113.0, 30.25], [113.25, 30.15], [113.5, 30.25], [113.75, 30.15], [114.0, 30.25], [114.25, 30.15], [114.5, 30.25], [115.03, 30.03], [115.25, 29.5], [115.03, 28.97], [114.68, 28.82], [114.65, 28.75], [114.75, 28.5], [114.53, 27.97], [114.18, 27.82], [114.15, 27.75], [114.25, 27.5], [114.03, 26.97], [113.5, 26.75], [112.97, 26.97], [112.82, 27.32], [112.75, 27.35], [112.5, 27.25], [112.25, 27.35], [112.0, 27.25], [111.75, 27.35], [111.5, 27.25], [111.25, 27.35], [111.0, 27.25], [110.47, 27.47], [110.32, 27.82], [109.97, 27.97], [109.75, 28.5], [109.85, 28.75], [109.75, 29.0]]]]}, "2025-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 29.0], [109.97, 29.53], [110.32, 29.68], [110.35, 29.75], [110.25, 30.0], [110.47, 30.53], [111.0, 30.75], [111.53, 30.53], [111.68, 30.18], [111.75, 30.15], [112.0, 30.25], [112.25, 30.15], [112.5, 30.25], [112.75, 30.15], [113.0, 30.25], [113.25, 30.15], [113.5, 30.25], [113.75, 30.15], [114.0, 30.25], [114.25, 30.15], [114.5, 30.25], [115.03, 30.03], [115.25, 29.5], [115.03, 28.97], [114.68, 28.82], [114.65, 28.75], [114.75, 28.5], [114.53, 27.97], [114.18, 27.82], [114.15, 27.75], [114.25, 27.5], [114.03, 26.97], [113.5, 26.75], [112.97, 26.97], [112.82, 27.32], [112.75, 27.35], [112.5, 27.25], [112.25, 27.35], [112.0, 27.25], [111.75, 27.35], [111.5, 27.25], [111.25, 27.35], [111.0, 27.25], [110.47, 27.47], [110.32, 27.82], [109.97, 27.97], [109.75, 28.5], [109.85, 28.75], [109.75, 29.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.769127319466747}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.247616401965783}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.5238548278808253, 3.017171478271507, 4.151336924235011]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.9949445088704465, 1.1072568257649777, 2.2821378072102902]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.0332391367534495, -6.801317790726273, -5.908292278417621]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.847733907729037, -7.769127319466747, -6.796361346031858]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.575025943963059, -1.7675813153247355, -1.4765608321307162]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.933357284884332, -1.9154971287539069, -1.6459925465319278]}}