{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:54.283839", "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": "2024-Mar-31_to_2024-Apr-02_186.0_69.5"}, "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": 2024030000680}, "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": "March 31 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 02 2024"}, "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": 80677.55051134537}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Chukchi Sea"]}, "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": 69.5}, "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": 186.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "186.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 183.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 190.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 67.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 70.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-177.53, 70.53], [-177.0, 70.75], [-176.75, 70.65], [-176.68, 70.68], [-176.53, 71.03], [-176.0, 71.25], [-175.47, 71.03], [-175.32, 70.68], [-175.25, 70.65], [-175.18, 70.68], [-175.03, 71.03], [-174.5, 71.25], [-173.97, 71.03], [-173.82, 70.68], [-173.75, 70.65], [-173.5, 70.75], [-173.25, 70.65], [-173.0, 70.75], [-172.75, 70.65], [-172.5, 70.75], [-172.25, 70.65], [-172.0, 70.75], [-171.47, 70.53], [-171.32, 70.18], [-171.25, 70.15], [-171.0, 70.25], [-170.47, 70.03], [-170.25, 69.5], [-170.46, 69.0], [-170.32, 68.68], [-169.97, 68.53], [-169.82, 68.18], [-169.47, 68.03], [-169.25, 67.5], [-169.47, 66.97], [-170.0, 66.75], [-170.25, 66.85], [-170.32, 66.82], [-170.47, 66.47], [-171.0, 66.25], [-171.25, 66.35], [-171.5, 66.25], [-171.75, 66.35], [-172.0, 66.25], [-172.25, 66.35], [-172.5, 66.25], [-173.03, 66.47], [-173.18, 66.82], [-173.25, 66.85], [-173.5, 66.75], [-173.75, 66.85], [-174.0, 66.75], [-174.53, 66.97], [-174.68, 67.32], [-174.75, 67.35], [-175.0, 67.25], [-175.25, 67.35], [-175.5, 67.25], [-176.03, 67.47], [-176.18, 67.82], [-176.25, 67.85], [-176.5, 67.75], [-177.03, 67.97], [-177.25, 68.5], [-177.15, 68.75], [-177.25, 69.0], [-177.15, 69.25], [-177.18, 69.32], [-177.53, 69.47], [-177.75, 70.0], [-177.53, 70.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-177.53, 69.47], [-177.75, 70.0], [-177.53, 70.53], [-177.0, 70.75], [-176.75, 70.65], [-176.68, 70.68], [-176.53, 71.03], [-176.0, 71.25], [-175.47, 71.03], [-175.32, 70.68], [-175.25, 70.65], [-175.18, 70.68], [-175.03, 71.03], [-174.5, 71.25], [-173.97, 71.03], [-173.82, 70.68], [-173.75, 70.65], [-173.5, 70.75], [-173.25, 70.65], [-173.0, 70.75], [-172.75, 70.65], [-172.5, 70.75], [-172.25, 70.65], [-172.0, 70.75], [-171.47, 70.53], [-171.32, 70.18], [-171.25, 70.15], [-171.0, 70.25], [-170.47, 70.03], [-170.25, 69.5], [-170.46, 69.0], [-170.32, 68.68], [-169.97, 68.53], [-169.82, 68.18], [-169.47, 68.03], [-169.25, 67.5], [-169.47, 66.97], [-170.0, 66.75], [-170.25, 66.85], [-170.32, 66.82], [-170.47, 66.47], [-171.0, 66.25], [-171.25, 66.35], [-171.5, 66.25], [-171.75, 66.35], [-172.0, 66.25], [-172.25, 66.35], [-172.5, 66.25], [-173.03, 66.47], [-173.18, 66.82], [-173.25, 66.85], [-173.5, 66.75], [-173.75, 66.85], [-174.0, 66.75], [-174.53, 66.97], [-174.68, 67.32], [-174.75, 67.35], [-175.0, 67.25], [-175.25, 67.35], [-175.5, 67.25], [-176.03, 67.47], [-176.18, 67.82], [-176.25, 67.85], [-176.5, 67.75], [-177.03, 67.97], [-177.25, 68.5], [-177.15, 68.75], [-177.25, 69.0], [-177.15, 69.25], [-177.18, 69.32], [-177.53, 69.47]]]]}, "2024-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-177.53, 69.47], [-177.75, 70.0], [-177.53, 70.53], [-177.0, 70.75], [-176.75, 70.65], [-176.68, 70.68], [-176.53, 71.03], [-176.0, 71.25], [-175.47, 71.03], [-175.32, 70.68], [-175.25, 70.65], [-175.18, 70.68], [-175.03, 71.03], [-174.5, 71.25], [-173.97, 71.03], [-173.82, 70.68], [-173.75, 70.65], [-173.5, 70.75], [-173.25, 70.65], [-173.0, 70.75], [-172.75, 70.65], [-172.5, 70.75], [-172.25, 70.65], [-172.0, 70.75], [-171.47, 70.53], [-171.32, 70.18], [-171.25, 70.15], [-171.0, 70.25], [-170.47, 70.03], [-170.25, 69.5], [-170.46, 69.0], [-170.32, 68.68], [-169.97, 68.53], [-169.82, 68.18], [-169.47, 68.03], [-169.25, 67.5], [-169.47, 66.97], [-170.0, 66.75], [-170.25, 66.85], [-170.32, 66.82], [-170.47, 66.47], [-171.0, 66.25], [-171.25, 66.35], [-171.5, 66.25], [-171.75, 66.35], [-172.0, 66.25], [-172.25, 66.35], [-172.5, 66.25], [-173.03, 66.47], [-173.18, 66.82], [-173.25, 66.85], [-173.5, 66.75], [-173.75, 66.85], [-174.0, 66.75], [-174.53, 66.97], [-174.68, 67.32], [-174.75, 67.35], [-175.0, 67.25], [-175.25, 67.35], [-175.5, 67.25], [-176.03, 67.47], [-176.18, 67.82], [-176.25, 67.85], [-176.5, 67.75], [-177.03, 67.97], [-177.25, 68.5], [-177.15, 68.75], [-177.25, 69.0], [-177.15, 69.25], [-177.18, 69.32], [-177.53, 69.47]]]]}, "2024-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-177.53, 69.47], [-177.75, 70.0], [-177.53, 70.53], [-177.0, 70.75], [-176.75, 70.65], [-176.68, 70.68], [-176.53, 71.03], [-176.0, 71.25], [-175.47, 71.03], [-175.32, 70.68], [-175.25, 70.65], [-175.18, 70.68], [-175.03, 71.03], [-174.5, 71.25], [-173.97, 71.03], [-173.82, 70.68], [-173.75, 70.65], [-173.5, 70.75], [-173.25, 70.65], [-173.0, 70.75], [-172.75, 70.65], [-172.5, 70.75], [-172.25, 70.65], [-172.0, 70.75], [-171.47, 70.53], [-171.32, 70.18], [-171.25, 70.15], [-171.0, 70.25], [-170.47, 70.03], [-170.25, 69.5], [-170.46, 69.0], [-170.32, 68.68], [-169.97, 68.53], [-169.82, 68.18], [-169.47, 68.03], [-169.25, 67.5], [-169.47, 66.97], [-170.0, 66.75], [-170.25, 66.85], [-170.32, 66.82], [-170.47, 66.47], [-171.0, 66.25], [-171.25, 66.35], [-171.5, 66.25], [-171.75, 66.35], [-172.0, 66.25], [-172.25, 66.35], [-172.5, 66.25], [-173.03, 66.47], [-173.18, 66.82], [-173.25, 66.85], [-173.5, 66.75], [-173.75, 66.85], [-174.0, 66.75], [-174.53, 66.97], [-174.68, 67.32], [-174.75, 67.35], [-175.0, 67.25], [-175.25, 67.35], [-175.5, 67.25], [-176.03, 67.47], [-176.18, 67.82], [-176.25, 67.85], [-176.5, 67.75], [-177.03, 67.97], [-177.25, 68.5], [-177.15, 68.75], [-177.25, 69.0], [-177.15, 69.25], [-177.18, 69.32], [-177.53, 69.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.296119938670898}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.667487768998022}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-22.8583184502113, -23.26199204310109, -22.989242025983913]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.769365448683658, -23.901090285917434, -24.226837622302384]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.098035226600599, -6.945916089725194, -6.958511990668274]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.02082575214024, -8.296119938670898, -7.599321715368831]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.163573322008275, -1.3608024034257578, -1.4490390732699525]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2067371309374444, -1.4683607887899635, -1.6893858086414217]}}