{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:08.520080", "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-24_to_2023-Nov-29_130.5_47.0"}, "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": 2023110000540}, "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 24 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 29 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 55181.893934199674}, "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", "Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Europe"]}, "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": 47.0}, "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": 130.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "130.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 130.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 136.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[131.25, 47.65], [131.5, 47.75], [131.8, 47.63], [131.97, 48.03], [132.5, 48.25], [132.75, 48.15], [133.0, 48.25], [133.53, 48.03], [133.75, 47.5], [133.65, 47.25], [133.68, 47.18], [133.75, 47.15], [133.82, 47.18], [133.97, 47.53], [134.5, 47.75], [134.75, 47.65], [134.82, 47.68], [134.97, 48.03], [135.5, 48.25], [136.03, 48.03], [136.18, 47.68], [136.53, 47.53], [136.75, 47.0], [136.53, 46.47], [136.18, 46.32], [136.03, 45.97], [135.5, 45.75], [135.25, 45.85], [135.0, 45.75], [134.75, 45.85], [134.63, 45.8], [134.75, 45.5], [134.53, 44.97], [134.0, 44.75], [133.75, 44.85], [133.5, 44.75], [133.25, 44.85], [133.0, 44.75], [132.47, 44.97], [132.25, 45.5], [132.35, 45.75], [132.32, 45.82], [132.25, 45.85], [132.0, 45.75], [131.47, 45.97], [131.32, 46.32], [131.25, 46.35], [131.18, 46.32], [131.03, 45.97], [130.5, 45.75], [130.25, 45.85], [130.0, 45.75], [129.47, 45.97], [129.25, 46.5], [129.47, 47.03], [129.82, 47.18], [129.97, 47.53], [130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.25, 47.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "Russian-Far-East", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[132.47, 46.53], [132.82, 46.68], [132.97, 47.03], [133.5, 47.25], [133.75, 47.15], [133.82, 47.18], [133.97, 47.53], [134.5, 47.75], [134.75, 47.65], [134.82, 47.68], [134.97, 48.03], [135.5, 48.25], [136.03, 48.03], [136.18, 47.68], [136.53, 47.53], [136.75, 47.0], [136.53, 46.47], [136.18, 46.32], [136.03, 45.97], [135.5, 45.75], [135.25, 45.85], [135.0, 45.75], [134.75, 45.85], [134.63, 45.8], [134.75, 45.5], [134.53, 44.97], [134.0, 44.75], [133.75, 44.85], [133.5, 44.75], [133.25, 44.85], [133.0, 44.75], [132.47, 44.97], [132.25, 45.5], [132.35, 45.75], [132.25, 46.0], [132.47, 46.53]]], [[[130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.53, 47.53], [131.75, 47.0], [131.53, 46.47], [131.18, 46.32], [131.03, 45.97], [130.5, 45.75], [130.25, 45.85], [130.0, 45.75], [129.47, 45.97], [129.25, 46.5], [129.47, 47.03], [129.82, 47.18], [129.97, 47.53], [130.5, 47.75]]]]}, "2023-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[132.47, 46.53], [132.82, 46.68], [132.97, 47.03], [133.5, 47.25], [133.75, 47.15], [133.82, 47.18], [133.97, 47.53], [134.5, 47.75], [134.75, 47.65], [134.82, 47.68], [134.97, 48.03], [135.5, 48.25], [136.03, 48.03], [136.18, 47.68], [136.53, 47.53], [136.75, 47.0], [136.53, 46.47], [136.18, 46.32], [136.03, 45.97], [135.5, 45.75], [135.25, 45.85], [135.0, 45.75], [134.75, 45.85], [134.63, 45.8], [134.75, 45.5], [134.53, 44.97], [134.0, 44.75], [133.75, 44.85], [133.5, 44.75], [133.25, 44.85], [133.0, 44.75], [132.47, 44.97], [132.25, 45.5], [132.35, 45.75], [132.25, 46.0], [132.47, 46.53]]], [[[130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.53, 47.53], [131.75, 47.0], [131.53, 46.47], [131.18, 46.32], [131.03, 45.97], [130.5, 45.75], [130.25, 45.85], [130.0, 45.75], [129.47, 45.97], [129.25, 46.5], [129.47, 47.03], [129.82, 47.18], [129.97, 47.53], [130.5, 47.75]]]]}, "2023-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.97, 47.53], [130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.25, 47.65], [131.5, 47.75], [131.8, 47.63], [131.97, 48.03], [132.5, 48.25], [132.75, 48.15], [133.0, 48.25], [133.53, 48.03], [133.75, 47.5], [133.65, 47.25], [133.68, 47.18], [133.75, 47.15], [133.82, 47.18], [133.97, 47.53], [134.5, 47.75], [134.75, 47.65], [134.82, 47.68], [134.97, 48.03], [135.5, 48.25], [136.03, 48.03], [136.18, 47.68], [136.53, 47.53], [136.75, 47.0], [136.53, 46.47], [136.18, 46.32], [136.03, 45.97], [135.5, 45.75], [135.25, 45.85], [135.0, 45.75], [134.75, 45.85], [134.63, 45.8], [134.75, 45.5], [134.53, 44.97], [134.0, 44.75], [133.75, 44.85], [133.5, 44.75], [133.25, 44.85], [133.0, 44.75], [132.47, 44.97], [132.25, 45.5], [132.35, 45.75], [132.32, 45.82], [132.25, 45.85], [132.0, 45.75], [131.47, 45.97], [131.32, 46.32], [131.25, 46.35], [131.18, 46.32], [131.03, 45.97], [130.5, 45.75], [130.25, 45.85], [130.0, 45.75], [129.47, 45.97], [129.25, 46.5], [129.47, 47.03], [129.82, 47.18], [129.97, 47.53]]]]}, "2023-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.5, 46.25], [129.97, 46.47], [129.75, 47.0], [129.97, 47.53], [130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.25, 47.65], [131.5, 47.75], [131.8, 47.63], [131.97, 48.03], [132.5, 48.25], [132.75, 48.15], [133.0, 48.25], [133.53, 48.03], [133.75, 47.5], [133.65, 47.25], [133.75, 47.0], [133.53, 46.47], [133.18, 46.32], [133.03, 45.97], [132.5, 45.75], [132.25, 45.85], [132.0, 45.75], [131.47, 45.97], [131.32, 46.32], [131.25, 46.35], [131.0, 46.25], [130.75, 46.35], [130.5, 46.25]]]]}, "2023-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.5, 46.25], [129.97, 46.47], [129.75, 47.0], [129.97, 47.53], [130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.25, 47.65], [131.5, 47.75], [131.8, 47.63], [131.97, 48.03], [132.5, 48.25], [132.75, 48.15], [133.0, 48.25], [133.53, 48.03], [133.75, 47.5], [133.65, 47.25], [133.75, 47.0], [133.53, 46.47], [133.18, 46.32], [133.03, 45.97], [132.5, 45.75], [132.25, 45.85], [132.0, 45.75], [131.47, 45.97], [131.32, 46.32], [131.25, 46.35], [131.0, 46.25], [130.75, 46.35], [130.5, 46.25]]]]}, "2023-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.5, 46.25], [129.97, 46.47], [129.75, 47.0], [129.97, 47.53], [130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.25, 47.65], [131.5, 47.75], [131.8, 47.63], [131.97, 48.03], [132.5, 48.25], [132.75, 48.15], [133.0, 48.25], [133.53, 48.03], [133.75, 47.5], [133.65, 47.25], [133.75, 47.0], [133.53, 46.47], [133.18, 46.32], [133.03, 45.97], [132.5, 45.75], [132.25, 45.85], [132.0, 45.75], [131.47, 45.97], [131.32, 46.32], [131.25, 46.35], [131.0, 46.25], [130.75, 46.35], [130.5, 46.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.757488191188258}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.489139747830855}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-17.357225256277445, -17.45662234147173, -19.489758017677303, -17.794260751269576, -17.70565557151076, -19.340621988393536]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-19.157673047967847, -19.385725743789294, -20.688644454475053, -18.226748528760254, -18.78044705935028, -20.4833970282358]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.340677457139357, -6.944708557675807, -8.621658230341321, -6.724272579670093, -6.296740406058749, -7.637461323409519]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.672383554211876, -7.456115953729977, -10.757488191188258, -7.301951869542108, -7.152125891161177, -8.739229152915499]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3215284436551586, -1.3271677177029126, -1.777353130187024, -1.4895096813574218, -1.440520288139009, -1.7451747467835181]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4142625177017516, -1.440667920921671, -2.3032138317777195, -1.6320202462251807, -1.5801525705162651, -1.9183554986691858]}}