{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:40.082783", "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-Jun-07_to_2025-Jun-10_97.0_33.5"}, "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": 2025060000284}, "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": "June 07 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 10 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 64213.011611151225}, "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": 33.5}, "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": 97.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "97.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 97.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 102.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[97.75, 32.85], [97.5, 32.75], [97.25, 32.85], [97.0, 32.75], [96.47, 32.97], [96.25, 33.5], [96.47, 34.03], [97.0, 34.25], [97.25, 34.15], [97.32, 34.18], [97.35, 34.25], [97.25, 34.5], [97.47, 35.03], [98.0, 35.25], [98.53, 35.03], [98.68, 34.68], [98.75, 34.65], [98.82, 34.68], [98.85, 34.75], [98.75, 35.0], [98.97, 35.53], [99.5, 35.75], [100.03, 35.53], [100.25, 35.0], [100.15, 34.75], [100.2, 34.63], [100.32, 34.68], [100.47, 35.03], [101.0, 35.25], [101.25, 35.15], [101.5, 35.25], [101.75, 35.15], [102.0, 35.25], [102.53, 35.03], [102.75, 34.5], [102.53, 33.97], [102.18, 33.82], [102.03, 33.47], [101.68, 33.32], [101.53, 32.97], [101.0, 32.75], [100.75, 32.85], [100.68, 32.82], [100.53, 32.47], [100.0, 32.25], [99.75, 32.35], [99.5, 32.25], [99.25, 32.35], [99.0, 32.25], [98.75, 32.35], [98.5, 32.25], [97.97, 32.47], [97.82, 32.82], [97.75, 32.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-06-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.5, 32.25], [97.97, 32.47], [97.75, 33.0], [97.97, 33.53], [98.5, 33.75], [99.03, 33.53], [99.25, 33.0], [99.03, 32.47], [98.5, 32.25]]], [[[100.47, 35.03], [101.0, 35.25], [101.25, 35.15], [101.5, 35.25], [101.75, 35.15], [102.0, 35.25], [102.53, 35.03], [102.75, 34.5], [102.53, 33.97], [102.18, 33.82], [102.03, 33.47], [101.5, 33.25], [101.25, 33.35], [101.0, 33.25], [100.47, 33.47], [100.25, 34.0], [100.35, 34.25], [100.25, 34.5], [100.47, 35.03]]]]}, "2025-06-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[97.0, 32.75], [96.47, 32.97], [96.25, 33.5], [96.47, 34.03], [97.0, 34.25], [97.25, 34.15], [97.32, 34.18], [97.35, 34.25], [97.25, 34.5], [97.47, 35.03], [98.0, 35.25], [98.53, 35.03], [98.68, 34.68], [98.75, 34.65], [98.82, 34.68], [98.85, 34.75], [98.75, 35.0], [98.97, 35.53], [99.5, 35.75], [100.03, 35.53], [100.25, 35.0], [100.15, 34.75], [100.2, 34.63], 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anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.186675349117157, -3.9035647534826876, -5.112598144221215, -3.5285002964942067]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5548511452214484, -5.522063041466879, -6.6662787352382225, -5.810773843037566]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4619998117576154, -1.7117152355187317, -2.284303966983966, -1.5425378980039075]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6308948974412572, -2.37342046722478, -3.1179937024400246, -2.381767797347254]}}