{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:52.942938", "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": "2023-Nov-01_to_2023-Nov-04_108.5_56.0"}, "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": 2023110000076}, "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 01 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 04 2023"}, "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": 56707.7432361202}, "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": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia"]}, "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": 56.0}, "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": 108.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "108.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 104.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 108.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.03, 53.97], [108.5, 53.75], [107.97, 53.97], [107.75, 54.5], [107.97, 55.03], [108.5, 55.25], [109.03, 55.03], [109.25, 54.5], [109.03, 53.97]]], [[[105.25, 55.5], [105.47, 56.03], [106.0, 56.25], [106.53, 56.03], [106.75, 55.5], [106.53, 54.97], [106.0, 54.75], [105.47, 54.97], [105.25, 55.5]]], [[[108.5, 56.75], [109.03, 56.53], [109.25, 56.0], [109.03, 55.47], [108.5, 55.25], [107.97, 55.47], [107.75, 56.0], [107.97, 56.53], [108.5, 56.75]]]]}, "2023-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.47, 55.03], [105.0, 55.25], [105.25, 55.15], [105.32, 55.18], [105.35, 55.25], [105.25, 55.5], [105.47, 56.03], [106.0, 56.25], [106.25, 56.15], [106.38, 56.2], [106.25, 56.5], [106.47, 57.03], [107.0, 57.25], [107.25, 57.15], [107.5, 57.25], [108.0, 57.04], [108.5, 57.25], [109.03, 57.03], [109.25, 56.5], [109.15, 56.25], [109.25, 56.0], [109.15, 55.75], [109.25, 55.5], [109.15, 55.25], [109.25, 55.0], [109.15, 54.75], [109.25, 54.5], [109.03, 53.97], [108.5, 53.75], [108.25, 53.85], [108.18, 53.82], [108.03, 53.47], [107.5, 53.25], [107.25, 53.35], [107.0, 53.25], [106.75, 53.35], [106.5, 53.25], [106.25, 53.35], [106.0, 53.25], [105.75, 53.35], [105.5, 53.25], [105.25, 53.35], [105.0, 53.25], [104.47, 53.47], [104.25, 54.0], [104.35, 54.25], [104.25, 54.5], [104.47, 55.03]]]]}, "2023-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.47, 55.03], [105.0, 55.25], [105.25, 55.15], [105.32, 55.18], [105.35, 55.25], [105.25, 55.5], [105.47, 56.03], [106.0, 56.25], [106.25, 56.15], [106.38, 56.2], [106.25, 56.5], [106.47, 57.03], [107.0, 57.25], [107.25, 57.15], [107.5, 57.25], [108.0, 57.04], [108.5, 57.25], [109.03, 57.03], [109.25, 56.5], [109.15, 56.25], [109.25, 56.0], [109.15, 55.75], [109.25, 55.5], [109.15, 55.25], [109.25, 55.0], [109.15, 54.75], [109.25, 54.5], [109.03, 53.97], [108.5, 53.75], [108.25, 53.85], [108.18, 53.82], [108.03, 53.47], [107.5, 53.25], [107.25, 53.35], [107.0, 53.25], [106.75, 53.35], [106.5, 53.25], [106.25, 53.35], [106.0, 53.25], 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"max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.67443215363025}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.251304146063786}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-18.394456692618746, -18.700400143902442, -18.616961783033275, -19.29015348926245]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-22.35913045136718, -27.061241667593976, -26.224154125284628, -24.623492497907336]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.065656133579504, -10.463792964065743, -10.058916925500203, -10.345294240238786]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.200203106483713, -14.67443215363025, -13.543328974249988, -11.957487279003885]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5332340920000729, -1.8455946230905367, -1.7464195839748016, -1.7839106788960775]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6324500503300738, -2.1540442549272756, -2.137975435748292, -2.185906773107808]}}