{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:17.244004", "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": "2025-Jul-06_to_2025-Jul-09_137.5_52.0"}, "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": 2025070000368}, "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": "July 06 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 09 2025"}, "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": 88431.20987593205}, "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": []}, "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": 52.0}, "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": 137.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "137.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 136.0}, "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": 50.5}, "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": [[[[135.97, 53.53], [136.32, 53.68], [136.47, 54.03], [137.0, 54.25], [137.25, 54.15], [137.5, 54.25], [137.75, 54.15], 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describing the boundary of the event at each time step", "value": {"2025-07-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.25, 52.5], [135.47, 53.03], [135.82, 53.18], [135.97, 53.53], [136.32, 53.68], [136.47, 54.03], [137.0, 54.25], [137.25, 54.15], [137.5, 54.25], [137.75, 54.15], [138.0, 54.25], [138.25, 54.15], [138.32, 54.18], [138.47, 54.53], [139.0, 54.75], [139.25, 54.65], [139.5, 54.75], [140.03, 54.53], [140.25, 54.0], [140.15, 53.75], [140.25, 53.5], [140.15, 53.25], [140.25, 53.0], [140.03, 52.47], [139.68, 52.32], [139.53, 51.97], [139.18, 51.82], [139.03, 51.47], [138.68, 51.32], [138.65, 51.25], [138.75, 51.0], [138.65, 50.75], [138.75, 50.5], [138.53, 49.97], [138.0, 49.75], [137.47, 49.97], [137.32, 50.32], [136.97, 50.47], [136.82, 50.82], [136.47, 50.97], [136.32, 51.32], [136.25, 51.35], [136.0, 51.25], [135.47, 51.47], [135.25, 52.0], [135.35, 52.25], [135.25, 52.5]]]]}, "2025-07-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.25, 52.5], [135.47, 53.03], [135.82, 53.18], [135.97, 53.53], [136.32, 53.68], [136.47, 54.03], [137.0, 54.25], [137.25, 54.15], [137.5, 54.25], [137.75, 54.15], [138.0, 54.25], [138.25, 54.15], [138.32, 54.18], [138.47, 54.53], [139.0, 54.75], [139.25, 54.65], [139.5, 54.75], [139.75, 54.65], [140.0, 54.75], [140.53, 54.53], [140.75, 54.0], [140.65, 53.75], [140.68, 53.68], [141.03, 53.53], [141.25, 53.0], [141.15, 52.75], [141.25, 52.5], [141.15, 52.25], [141.25, 52.0], [141.03, 51.47], [140.5, 51.25], [140.25, 51.35], [140.0, 51.25], [139.75, 51.35], [139.5, 51.25], [139.25, 51.35], [139.18, 51.32], [139.04, 51.0], [139.25, 50.5], [139.03, 49.97], [138.5, 49.75], [138.25, 49.85], [138.0, 49.75], [137.47, 49.97], [137.32, 50.32], [136.97, 50.47], [136.82, 50.82], [136.47, 50.97], [136.32, 51.32], [136.25, 51.35], [136.0, 51.25], [135.47, 51.47], [135.25, 52.0], [135.35, 52.25], [135.25, 52.5]]]]}, "2025-07-08T11:30:00.000000000": {"type": "MultiPolygon", 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"coordinates": [[[[136.25, 52.0], [136.35, 52.25], [136.25, 52.5], [136.47, 53.03], [137.0, 53.25], [137.25, 53.15], [137.32, 53.18], [137.47, 53.53], [138.0, 53.75], [138.25, 53.65], [138.32, 53.68], [138.47, 54.03], [139.0, 54.25], [139.25, 54.15], [139.32, 54.18], [139.47, 54.53], [140.0, 54.75], [140.53, 54.53], [140.75, 54.0], [140.65, 53.75], [140.68, 53.68], [141.03, 53.53], [141.25, 53.0], [141.15, 52.75], [141.25, 52.5], [141.15, 52.25], [141.25, 52.0], [141.03, 51.47], [140.5, 51.25], [140.25, 51.35], [140.0, 51.25], [139.75, 51.35], [139.5, 51.25], [139.25, 51.35], [139.18, 51.32], [139.04, 51.0], [139.25, 50.5], [139.03, 49.97], [138.5, 49.75], [138.25, 49.85], [138.0, 49.75], [137.47, 49.97], [137.32, 50.32], [136.97, 50.47], [136.82, 50.82], [136.47, 50.97], [136.25, 51.5], [136.35, 51.75], [136.25, 52.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.836450117381958}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.533555138232186}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.818155730004435, 10.317001055994808, 10.128475416467552, 12.011739274567276]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.750236765543661, 7.6471051534016965, 7.996457672119163, 9.387979125976585]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.517641454215859, -6.828530698507919, -7.08335871220288, -5.381685901378453]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.066440244814032, -8.836450117381958, -8.561710740510534, -6.063846473878982]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6856449673776825, -1.855194235979617, -2.0047793635821405, -1.622466181208338]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1189533490393195, -2.291409392938398, -2.3816532984338528, -1.9189992993033729]}}