{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:58.558014", "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-Mar-27_to_2025-Mar-29_121.5_55.5"}, "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": 2025030000708}, "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 27 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 29 2025"}, "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": 70423.43847672212}, "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": 55.5}, "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": 121.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 120.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 125.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[120.32, 55.18], [120.47, 55.53], [120.82, 55.68], [120.96, 56.0], [120.75, 56.5], [120.97, 57.03], [121.32, 57.18], 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57.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 54.5], [119.97, 55.03], [120.32, 55.18], [120.47, 55.53], [120.82, 55.68], [120.96, 56.0], [120.75, 56.5], [120.97, 57.03], [121.32, 57.18], [121.35, 57.25], [121.25, 57.5], [121.47, 58.03], [122.0, 58.25], [122.43, 58.07], [122.25, 58.5], [122.47, 59.03], [122.82, 59.18], [122.97, 59.53], [123.5, 59.75], [124.03, 59.53], [124.18, 59.18], [124.25, 59.15], [124.5, 59.25], [125.03, 59.03], [125.18, 58.68], [125.53, 58.53], [125.75, 58.0], [125.53, 57.47], [125.13, 57.3], [125.25, 57.0], [125.03, 56.47], [124.68, 56.32], [124.65, 56.25], [124.75, 56.0], [124.53, 55.47], [124.18, 55.32], [124.15, 55.25], [124.25, 55.0], [124.03, 54.47], [123.68, 54.32], [123.53, 53.97], [123.0, 53.75], [122.75, 53.85], [122.5, 53.75], [122.25, 53.85], [122.0, 53.75], [121.75, 53.85], [121.5, 53.75], [121.25, 53.85], [121.18, 53.82], [121.03, 53.47], [120.5, 53.25], [119.97, 53.47], [119.75, 54.0], [119.85, 54.25], [119.75, 54.5]], [[123.32, 57.32], [123.07, 57.43], [123.18, 57.18], [123.25, 57.15], [123.38, 57.2], [123.32, 57.32]], [[122.68, 57.68], [122.93, 57.57], [122.82, 57.82], [122.57, 57.93], [122.68, 57.68]]]]}, "2025-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 54.5], [119.97, 55.03], [120.32, 55.18], [120.47, 55.53], [120.82, 55.68], [120.96, 56.0], [120.75, 56.5], [120.97, 57.03], [121.32, 57.18], [121.35, 57.25], [121.25, 57.5], [121.47, 58.03], [122.0, 58.25], [122.43, 58.07], [122.25, 58.5], [122.47, 59.03], [122.82, 59.18], [122.97, 59.53], [123.5, 59.75], [124.03, 59.53], [124.18, 59.18], [124.25, 59.15], [124.5, 59.25], [125.03, 59.03], [125.18, 58.68], [125.53, 58.53], [125.75, 58.0], 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"value": -10.311167085888684}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.973637585596613}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-17.830146194085813, -17.827948168622726, -17.232379224823717]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-20.875272496541328, -20.620074971516914, -19.822566095987924]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.85238815771575, -8.189760647651118, -7.878763951422973]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.1875566260085, -9.767752486202625, -10.311167085888684]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5841255737356223, -1.6526284731989438, -1.668038128288983]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8837908065459597, -1.8791182106723505, -2.1875871113737726]}}