{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:31.096365", "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": "2021-Nov-20_to_2021-Nov-24_93.0_37.0"}, "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": 2021110000701}, "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 20 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 24 2021"}, "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": 51888.82978746707}, "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": 37.0}, "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": 93.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "93.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 93.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 97.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.5}, "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": [[[[92.47, 37.53], [93.0, 37.75], [93.25, 37.65], [93.32, 37.68], [93.47, 38.03], [94.0, 38.25], [94.5, 38.04], [95.0, 38.25], [95.3, 38.13], [95.47, 38.53], [96.0, 38.75], [96.53, 38.53], [96.75, 38.0], [96.65, 37.75], [96.68, 37.68], [96.75, 37.65], [97.0, 37.75], [97.25, 37.65], [97.5, 37.75], [98.03, 37.53], [98.25, 37.0], [98.15, 36.75], [98.25, 36.5], [98.03, 35.97], [97.5, 35.75], [97.0, 35.96], [96.5, 35.75], [96.25, 35.85], [96.0, 35.75], [95.75, 35.85], [95.5, 35.75], [95.25, 35.85], [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], [92.47, 36.47], [92.25, 37.0], [92.47, 37.53]]]]}}, "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": {"2021-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 36.47], [92.25, 37.0], [92.47, 37.53], [93.0, 37.75], [93.53, 37.53], [93.68, 37.18], [93.75, 37.15], [94.0, 37.25], [94.3, 37.13], [94.35, 37.25], [94.25, 37.5], [94.47, 38.03], [95.0, 38.25], [95.3, 38.13], [95.47, 38.53], [96.0, 38.75], [96.53, 38.53], [96.75, 38.0], [96.53, 37.47], [96.0, 37.25], [95.7, 37.38], [95.65, 37.25], [95.75, 37.0], [95.53, 36.47], [95.0, 36.25], [94.7, 36.38], [94.53, 35.97], [94.0, 35.75], [93.75, 35.85], [93.5, 35.75], [92.97, 35.97], [92.82, 36.32], [92.47, 36.47]]]]}, "2021-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 36.47], [92.25, 37.0], [92.47, 37.53], [93.0, 37.75], [93.25, 37.65], [93.32, 37.68], [93.47, 38.03], [94.0, 38.25], [94.5, 38.04], [95.0, 38.25], [95.3, 38.13], [95.47, 38.53], [96.0, 38.75], [96.53, 38.53], [96.75, 38.0], [96.65, 37.75], [96.68, 37.68], [96.75, 37.65], [97.0, 37.75], [97.25, 37.65], [97.5, 37.75], [98.03, 37.53], [98.25, 37.0], [98.15, 36.75], [98.25, 36.5], [98.03, 35.97], [97.5, 35.75], [97.0, 35.96], [96.5, 35.75], [96.25, 35.85], [96.0, 35.75], [95.75, 35.85], [95.5, 35.75], [95.25, 35.85], [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], [92.47, 36.47]]]]}, "2021-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 36.47], [92.25, 37.0], [92.47, 37.53], [93.0, 37.75], [93.25, 37.65], [93.32, 37.68], [93.47, 38.03], [94.0, 38.25], [94.5, 38.04], [95.0, 38.25], [95.3, 38.13], [95.47, 38.53], [96.0, 38.75], [96.53, 38.53], [96.75, 38.0], [96.65, 37.75], [96.68, 37.68], [96.75, 37.65], [97.0, 37.75], [97.25, 37.65], [97.5, 37.75], [98.03, 37.53], [98.25, 37.0], [98.15, 36.75], [98.25, 36.5], [98.03, 35.97], [97.5, 35.75], [97.0, 35.96], [96.5, 35.75], [96.25, 35.85], [96.0, 35.75], [95.75, 35.85], [95.5, 35.75], [95.25, 35.85], [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], [92.47, 36.47]]]]}, "2021-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.0, 36.25], [92.47, 36.47], [92.25, 37.0], [92.47, 37.53], [93.0, 37.75], [93.25, 37.65], [93.32, 37.68], [93.47, 38.03], [94.0, 38.25], [94.53, 38.03], [94.68, 37.68], [94.75, 37.65], [95.0, 37.75], [95.25, 37.65], [95.32, 37.68], [95.47, 38.03], [96.0, 38.25], [96.53, 38.03], [96.68, 37.68], [96.75, 37.65], [97.0, 37.75], [97.25, 37.65], [97.5, 37.75], [98.03, 37.53], [98.25, 37.0], [98.15, 36.75], [98.25, 36.5], [98.03, 35.97], [97.5, 35.75], [97.0, 35.96], [96.5, 35.75], [96.25, 35.85], [96.0, 35.75], [95.75, 35.85], [95.5, 35.75], [95.25, 35.85], [95.0, 35.75], [94.75, 35.85], [94.5, 35.75], [94.25, 35.85], [94.0, 35.75], [93.47, 35.97], [93.32, 36.32], [93.25, 36.35], [93.0, 36.25]]]]}, "2021-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.0, 36.25], [92.47, 36.47], [92.25, 37.0], [92.47, 37.53], [93.0, 37.75], [93.25, 37.65], [93.5, 37.75], [94.03, 37.53], [94.25, 37.0], [94.03, 36.47], [93.5, 36.25], [93.25, 36.35], [93.0, 36.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.973499042277155}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.115065994638427}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.529556247829362, -8.839581418306807, -8.770392543945206, -7.4143650362148605, -7.721285630409511]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-21.68971552264165, -22.614207005953432, -22.600042766773043, -13.49166085105162, -7.99224946623815]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.246159867771245, -4.471350650702717, -4.251761529664246, -3.6059011104923844, -3.1279763261082394]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.196477980538106, -5.973499042277155, -5.856308555792765, -4.49682160958406, -3.1439831992910854]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4520976309930083, -1.667898638784563, -1.6353547530580825, -1.4336691883342318, -1.4088878133717315]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5571474283619018, -2.037976651117274, -1.9143941001066176, -1.6052519540507695, -1.409671780641371]}}