{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:28.411766", "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": "2022-Apr-24_to_2022-Apr-30_138.0_51.0"}, "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": 2022040000810}, "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": "April 24 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 30 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 53431.83244384058}, "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": ["Sea of Japan"]}, "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": 51.0}, "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": 138.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "138.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 138.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.25, 51.0], [137.35, 51.25], [137.25, 51.5], [137.47, 52.03], [138.0, 52.25], [138.25, 52.15], [138.5, 52.25], [138.75, 52.15], [139.0, 52.25], [139.25, 52.15], [139.5, 52.25], [140.03, 52.03], [140.18, 51.68], [140.25, 51.65], [140.5, 51.75], [141.03, 51.53], [141.25, 51.0], [141.03, 50.47], [140.68, 50.32], [140.65, 50.25], [140.75, 50.0], [140.53, 49.47], [140.18, 49.32], [140.03, 48.97], [139.68, 48.82], [139.65, 48.75], [139.75, 48.5], [139.53, 47.97], [139.0, 47.75], [138.75, 47.85], [138.5, 47.75], [138.25, 47.85], [138.0, 47.75], [137.47, 47.97], [137.25, 48.5], [137.35, 48.75], [137.25, 49.0], [137.47, 49.53], [137.82, 49.68], [137.85, 49.75], [137.75, 50.0], [137.85, 50.25], [137.82, 50.32], [137.47, 50.47], [137.25, 51.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.25, 51.5], [137.47, 52.03], [138.0, 52.25], [138.25, 52.15], [138.5, 52.25], [138.75, 52.15], [139.0, 52.25], [139.25, 52.15], [139.5, 52.25], [140.03, 52.03], [140.18, 51.68], [140.25, 51.65], [140.5, 51.75], [141.03, 51.53], [141.25, 51.0], [141.03, 50.47], [140.5, 50.25], [140.25, 50.35], [140.0, 50.25], [139.47, 50.47], [139.32, 50.82], [139.25, 50.85], [139.18, 50.82], [139.15, 50.75], [139.25, 50.5], [139.03, 49.97], [138.5, 49.75], [137.97, 49.97], [137.82, 50.32], [137.47, 50.47], [137.25, 51.0], [137.35, 51.25], [137.25, 51.5]]]]}, "2022-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.25, 51.5], [137.47, 52.03], [138.0, 52.25], [138.25, 52.15], [138.5, 52.25], [138.75, 52.15], [139.0, 52.25], [139.25, 52.15], [139.5, 52.25], [140.03, 52.03], [140.18, 51.68], [140.25, 51.65], [140.5, 51.75], [141.03, 51.53], [141.25, 51.0], [141.03, 50.47], [140.68, 50.32], [140.53, 49.97], [140.0, 49.75], [139.75, 49.85], [139.68, 49.82], [139.53, 49.47], [139.0, 49.25], [138.75, 49.35], [138.5, 49.25], [137.97, 49.47], [137.75, 50.0], [137.85, 50.25], [137.82, 50.32], [137.47, 50.47], [137.25, 51.0], [137.35, 51.25], [137.25, 51.5]]]]}, "2022-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.25, 49.0], [137.47, 49.53], [137.82, 49.68], [137.85, 49.75], [137.75, 50.0], [137.85, 50.25], [137.82, 50.32], [137.47, 50.47], [137.25, 51.0], [137.35, 51.25], [137.25, 51.5], [137.47, 52.03], [138.0, 52.25], [138.25, 52.15], [138.5, 52.25], [138.75, 52.15], [139.0, 52.25], [139.25, 52.15], [139.5, 52.25], [140.03, 52.03], [140.18, 51.68], [140.25, 51.65], [140.5, 51.75], [141.03, 51.53], [141.25, 51.0], [141.03, 50.47], [140.68, 50.32], [140.65, 50.25], [140.75, 50.0], [140.53, 49.47], [140.18, 49.32], [140.03, 48.97], [139.68, 48.82], [139.65, 48.75], [139.75, 48.5], [139.53, 47.97], [139.0, 47.75], [138.75, 47.85], [138.5, 47.75], [138.25, 47.85], [138.0, 47.75], [137.47, 47.97], [137.25, 48.5], [137.35, 48.75], [137.25, 49.0]]]]}, 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47.97], [137.75, 48.5], [137.96, 49.0], [137.75, 49.5]]]]}, "2022-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.0, 50.25], [137.47, 50.47], [137.25, 51.0], [137.47, 51.53], [138.0, 51.75], [138.53, 51.53], [138.75, 51.0], [138.57, 50.57], [139.0, 50.75], [139.53, 50.53], [139.75, 50.0], [139.53, 49.47], [139.0, 49.25], [138.47, 49.47], [138.25, 50.0], [138.43, 50.43], [138.0, 50.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.36820922920765}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.696706321442497}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.1639936232178343, -2.468638709928598, -2.5541508638700634, -2.3704642727368537, -2.4248740994027003, -1.568702489686416, -0.4207267850952121]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.4618100727880687, -3.55871468011577, -4.180794613754244, -4.062449573877359, -4.203157215445287, -2.814985267175416, -1.41328817149099]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.332107078118503, -4.495572261801968, -4.713075376291086, -4.746287204869221, -5.116929491876483, -4.525658918689572, -4.4033459160611415]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.296651143602276, -6.303146987226, -5.797288756896478, -5.662590872961232, -6.36820922920765, -5.337918801503349, -4.610524940283483]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3072622216479923, -1.3907517778825584, 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