{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:09.145420", "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-Sep-02_to_2023-Sep-04_126.0_53.5"}, "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": 2023090000116}, "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": "September 02 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 04 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 70103.6703382481}, "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": 53.5}, "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": 126.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "126.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 123.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 129.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[122.47, 54.53], [123.0, 54.75], [123.53, 54.53], [123.68, 54.18], [123.75, 54.15], [123.82, 54.18], [123.97, 54.53], [124.5, 54.75], [124.75, 54.65], [125.0, 54.75], [125.25, 54.65], [125.5, 54.75], [125.75, 54.65], [126.0, 54.75], [126.25, 54.65], [126.5, 54.75], [126.75, 54.65], [127.0, 54.75], [127.25, 54.65], [127.5, 54.75], [128.0, 54.54], [128.5, 54.75], [128.75, 54.65], [129.0, 54.75], [129.25, 54.65], [129.5, 54.75], [130.03, 54.53], [130.25, 54.0], [130.03, 53.47], [129.68, 53.32], [129.53, 52.97], [129.0, 52.75], [128.75, 52.85], [128.5, 52.75], [128.25, 52.85], [128.18, 52.82], [128.03, 52.47], [127.68, 52.32], [127.53, 51.97], [127.0, 51.75], [126.75, 51.85], [126.5, 51.75], [126.25, 51.85], [126.0, 51.75], [125.75, 51.85], [125.5, 51.75], [125.25, 51.85], [125.0, 51.75], [124.75, 51.85], [124.5, 51.75], [124.25, 51.85], [124.0, 51.75], [123.47, 51.97], [123.25, 52.5], [123.35, 52.75], [123.32, 52.82], [122.97, 52.97], [122.82, 53.32], [122.47, 53.47], [122.25, 54.0], [122.47, 54.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[122.47, 53.47], [122.25, 54.0], [122.47, 54.53], [123.0, 54.75], [123.53, 54.53], [123.68, 54.18], [123.75, 54.15], [123.82, 54.18], [123.97, 54.53], [124.5, 54.75], [124.75, 54.65], [125.0, 54.75], [125.25, 54.65], [125.5, 54.75], [125.75, 54.65], [126.0, 54.75], [126.25, 54.65], [126.5, 54.75], [126.75, 54.65], [127.0, 54.75], [127.25, 54.65], [127.5, 54.75], [128.0, 54.54], [128.5, 54.75], [128.75, 54.65], [129.0, 54.75], [129.25, 54.65], [129.5, 54.75], [130.03, 54.53], [130.25, 54.0], [130.03, 53.47], [129.68, 53.32], [129.53, 52.97], [129.0, 52.75], [128.75, 52.85], [128.5, 52.75], [128.25, 52.85], [128.18, 52.82], [128.03, 52.47], [127.68, 52.32], [127.53, 51.97], [127.0, 51.75], [126.75, 51.85], [126.5, 51.75], [126.25, 51.85], 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52.75], [128.75, 52.85], [128.5, 52.75], [128.25, 52.85], [128.18, 52.82], [128.03, 52.47], [127.68, 52.32], [127.53, 51.97], [127.0, 51.75], [126.75, 51.85], [126.5, 51.75], [126.25, 51.85], [126.0, 51.75], [125.75, 51.85], [125.5, 51.75], [125.25, 51.85], [125.0, 51.75], [124.75, 51.85], [124.5, 51.75], [124.25, 51.85], [124.0, 51.75], [123.47, 51.97], [123.25, 52.5], [123.35, 52.75], [123.32, 52.82], [122.97, 52.97], [122.82, 53.32], [122.47, 53.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.716884384385935}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.2976709637135855}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.199920078333378, 7.5223929204894375, 7.765325158632322]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.861242860835716, 5.726300678980181, 6.688718504290193]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.13763427232549, -5.601429349760055, -5.1539492690552065]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.516045766755326, -6.577626749253454, -6.716884384385935]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7315143147618954, -1.8365384890155225, -1.645196030423639]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2907029746244407, -2.1194332338470288, -2.1084977645775003]}}