{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:26.461575", "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-Feb-12_to_2025-Feb-16_95.0_36.5"}, "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": 2025020000326}, "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": "February 12 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 16 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": 54388.998723901146}, "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": 36.5}, "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": 95.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "95.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 90.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 95.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[95.75, 36.5], [95.53, 35.97], [95.0, 35.75], [94.75, 35.85], [94.5, 35.75], [94.25, 35.85], [94.0, 35.75], [93.75, 35.85], [93.5, 35.75], [92.97, 35.97], [92.82, 36.32], [92.75, 36.35], [92.5, 36.25], [92.2, 36.38], [92.03, 35.97], [91.68, 35.82], [91.53, 35.47], [91.0, 35.25], [90.75, 35.35], [90.5, 35.25], [89.97, 35.47], [89.82, 35.82], [89.47, 35.97], [89.25, 36.5], [89.47, 37.03], [90.0, 37.25], [90.25, 37.15], [90.32, 37.18], [90.47, 37.53], [90.82, 37.68], [90.97, 38.03], [91.32, 38.18], [91.47, 38.53], [92.0, 38.75], [92.53, 38.53], [92.68, 38.18], [92.75, 38.15], [93.0, 38.25], [93.25, 38.15], [93.5, 38.25], [94.03, 38.03], [94.18, 37.68], [94.53, 37.53], [94.68, 37.18], [94.75, 37.15], [95.0, 37.25], [95.53, 37.03], [95.75, 36.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "Tibetan-Plateau"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.47, 35.97], [89.25, 36.5], [89.47, 37.03], [90.0, 37.25], [90.25, 37.15], [90.32, 37.18], [90.47, 37.53], [90.82, 37.68], [90.97, 38.03], [91.32, 38.18], [91.47, 38.53], [92.0, 38.75], [92.53, 38.53], [92.68, 38.18], [92.75, 38.15], [93.0, 38.25], [93.25, 38.15], [93.5, 38.25], [94.03, 38.03], [94.18, 37.68], [94.53, 37.53], [94.68, 37.18], [94.75, 37.15], [95.0, 37.25], [95.53, 37.03], [95.75, 36.5], [95.53, 35.97], [95.0, 35.75], [94.75, 35.85], [94.5, 35.75], [94.25, 35.85], [94.0, 35.75], [93.75, 35.85], [93.5, 35.75], [92.97, 35.97], [92.82, 36.32], [92.75, 36.35], [92.5, 36.25], [92.2, 36.38], [92.03, 35.97], [91.68, 35.82], [91.53, 35.47], [91.0, 35.25], [90.75, 35.35], [90.5, 35.25], [89.97, 35.47], [89.82, 35.82], [89.47, 35.97]]]]}, "2025-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.47, 35.97], [89.25, 36.5], [89.47, 37.03], [90.0, 37.25], [90.25, 37.15], [90.32, 37.18], [90.47, 37.53], [90.82, 37.68], [90.97, 38.03], [91.32, 38.18], [91.47, 38.53], [92.0, 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36.35], [92.5, 36.25], [92.2, 36.38], [92.03, 35.97], [91.5, 35.75], [90.97, 35.97], [90.82, 36.32], [90.47, 36.47]]]]}, "2025-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.47, 37.03], [95.0, 37.25], [95.53, 37.03], [95.75, 36.5], [95.53, 35.97], [95.0, 35.75], [94.47, 35.97], [94.25, 36.5], [94.47, 37.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.5163603198074895}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.981958285343288}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-15.403452040932393, -15.466562421394144, -15.042197551149286, -11.931113052368119, -6.626202646891272]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-26.12932370503742, -25.3141012827555, -25.45289777119953, -22.606992467244453, -6.626202646891272]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.046866927454141, -5.256916778952891, -4.898573139093662, -4.687653340789738, -3.753928685288315]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.5163603198074895, -6.286973621817225, -6.695718928733498, -5.369239040204121, -3.753928685288315]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.554791366693591, -1.6356340962065081, -1.5024313442758435, -1.4321146531042406, -1.1557219611909944]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.121014719078484, -1.9322846429037768, -1.923397721753036, -1.6790283191015212, -1.1557219611909944]}}