{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:51.305706", "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-May-30_to_2024-Jun-01_91.0_55.0"}, "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": 2024050000773}, "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": "May 30 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 01 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": 117272.17912937177}, "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": 55.0}, "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": 91.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "91.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 90.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 98.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[89.25, 55.5], [89.47, 56.03], [90.0, 56.25], [90.25, 56.15], [90.32, 56.18], [90.47, 56.53], [91.0, 56.75], [91.25, 56.65], [91.5, 56.75], [91.8, 56.63], [91.85, 56.75], [91.75, 57.0], [91.97, 57.53], [92.32, 57.68], [92.47, 58.03], [93.0, 58.25], [93.5, 58.04], [93.82, 58.18], [93.97, 58.53], [94.38, 58.7], [94.25, 59.0], [94.47, 59.53], [95.0, 59.75], [95.25, 59.65], [95.32, 59.68], [95.47, 60.03], [96.0, 60.25], [96.53, 60.03], [96.68, 59.68], [96.75, 59.65], [97.0, 59.75], [97.25, 59.65], [97.5, 59.75], [97.75, 59.65], [98.0, 59.75], [98.53, 59.53], [98.75, 59.0], [98.53, 58.47], [98.18, 58.32], [98.03, 57.97], [97.68, 57.82], [97.53, 57.47], [97.0, 57.25], [96.75, 57.35], [96.68, 57.32], [96.65, 57.25], [96.75, 57.0], [96.53, 56.47], [96.0, 56.25], [95.75, 56.35], [95.68, 56.32], [95.53, 55.97], [95.18, 55.82], [95.03, 55.47], [94.68, 55.32], [94.53, 54.97], [94.0, 54.75], [93.75, 54.85], [93.5, 54.75], [93.25, 54.85], [93.18, 54.82], [93.03, 54.47], [92.68, 54.32], [92.53, 53.97], [92.18, 53.82], [92.03, 53.47], [91.5, 53.25], [91.25, 53.35], [91.0, 53.25], [90.75, 53.35], [90.68, 53.32], [90.53, 52.97], [90.0, 52.75], [89.47, 52.97], [89.25, 53.5], [89.46, 54.0], [89.25, 54.5], [89.46, 55.0], [89.25, 55.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Siberia", "E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.25, 54.5], [89.46, 55.0], [89.25, 55.5], [89.47, 56.03], [90.0, 56.25], [90.25, 56.15], [90.32, 56.18], [90.47, 56.53], [91.0, 56.75], [91.25, 56.65], [91.5, 56.75], [91.8, 56.63], [91.85, 56.75], [91.75, 57.0], [91.97, 57.53], [92.32, 57.68], [92.47, 58.03], [93.0, 58.25], [93.5, 58.04], [93.82, 58.18], [93.97, 58.53], [94.38, 58.7], [94.25, 59.0], [94.47, 59.53], [95.0, 59.75], [95.25, 59.65], [95.32, 59.68], [95.47, 60.03], [96.0, 60.25], [96.53, 60.03], [96.68, 59.68], [96.75, 59.65], [97.0, 59.75], [97.25, 59.65], [97.5, 59.75], [97.75, 59.65], [98.0, 59.75], [98.53, 59.53], [98.75, 59.0], [98.53, 58.47], [98.18, 58.32], [98.03, 57.97], [97.68, 57.82], [97.53, 57.47], [97.0, 57.25], [96.75, 57.35], [96.68, 57.32], [96.65, 57.25], [96.75, 57.0], [96.53, 56.47], [96.0, 56.25], [95.75, 56.35], [95.68, 56.32], [95.53, 55.97], [95.18, 55.82], [95.03, 55.47], [94.68, 55.32], [94.53, 54.97], [94.0, 54.75], [93.75, 54.85], [93.5, 54.75], [93.25, 54.85], [93.18, 54.82], [93.03, 54.47], [92.68, 54.32], [92.53, 53.97], [92.18, 53.82], [92.03, 53.47], [91.5, 53.25], [91.25, 53.35], [91.0, 53.25], [90.75, 53.35], [90.68, 53.32], [90.53, 52.97], [90.0, 52.75], [89.47, 52.97], [89.25, 53.5], [89.46, 54.0], [89.25, 54.5]]]]}, "2024-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.25, 54.5], [89.46, 55.0], [89.25, 55.5], [89.47, 56.03], [90.0, 56.25], [90.25, 56.15], [90.32, 56.18], [90.47, 56.53], [91.0, 56.75], [91.25, 56.65], [91.5, 56.75], [91.8, 56.63], [91.85, 56.75], [91.75, 57.0], [91.97, 57.53], [92.32, 57.68], [92.47, 58.03], [93.0, 58.25], [93.5, 58.04], [93.82, 58.18], [93.97, 58.53], [94.38, 58.7], [94.25, 59.0], [94.47, 59.53], [95.0, 59.75], [95.25, 59.65], [95.32, 59.68], [95.47, 60.03], [96.0, 60.25], [96.53, 60.03], [96.68, 59.68], [96.75, 59.65], [97.0, 59.75], [97.25, 59.65], [97.5, 59.75], [97.75, 59.65], [98.0, 59.75], [98.53, 59.53], [98.75, 59.0], [98.53, 58.47], [98.18, 58.32], [98.03, 57.97], [97.68, 57.82], [97.53, 57.47], [97.0, 57.25], [96.75, 57.35], [96.68, 57.32], [96.65, 57.25], [96.75, 57.0], [96.53, 56.47], [96.0, 56.25], [95.75, 56.35], [95.68, 56.32], [95.53, 55.97], [95.18, 55.82], [95.03, 55.47], [94.68, 55.32], [94.53, 54.97], [94.0, 54.75], [93.75, 54.85], [93.5, 54.75], [93.25, 54.85], [93.18, 54.82], [93.03, 54.47], [92.68, 54.32], [92.53, 53.97], [92.18, 53.82], [92.03, 53.47], [91.5, 53.25], [91.25, 53.35], [91.0, 53.25], [90.75, 53.35], [90.68, 53.32], [90.53, 52.97], [90.0, 52.75], [89.47, 52.97], [89.25, 53.5], [89.46, 54.0], [89.25, 54.5]]]]}, "2024-06-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.25, 54.5], [89.46, 55.0], [89.25, 55.5], [89.47, 56.03], [90.0, 56.25], [90.25, 56.15], [90.32, 56.18], [90.47, 56.53], [91.0, 56.75], [91.25, 56.65], [91.5, 56.75], [91.8, 56.63], [91.85, 56.75], [91.75, 57.0], [91.97, 57.53], [92.32, 57.68], [92.47, 58.03], [93.0, 58.25], [93.5, 58.04], [93.82, 58.18], [93.97, 58.53], [94.38, 58.7], [94.25, 59.0], [94.47, 59.53], [95.0, 59.75], [95.25, 59.65], [95.32, 59.68], [95.47, 60.03], [96.0, 60.25], [96.53, 60.03], [96.68, 59.68], [96.75, 59.65], [97.0, 59.75], [97.25, 59.65], [97.5, 59.75], [97.75, 59.65], [98.0, 59.75], [98.53, 59.53], [98.75, 59.0], [98.53, 58.47], [98.18, 58.32], [98.03, 57.97], [97.68, 57.82], [97.53, 57.47], [97.0, 57.25], [96.75, 57.35], [96.68, 57.32], [96.65, 57.25], [96.75, 57.0], [96.53, 56.47], [96.0, 56.25], [95.75, 56.35], [95.68, 56.32], [95.53, 55.97], [95.18, 55.82], [95.03, 55.47], [94.68, 55.32], [94.53, 54.97], [94.0, 54.75], [93.75, 54.85], [93.5, 54.75], [93.25, 54.85], [93.18, 54.82], [93.03, 54.47], [92.68, 54.32], [92.53, 53.97], [92.18, 53.82], [92.03, 53.47], [91.5, 53.25], [91.25, 53.35], [91.0, 53.25], [90.75, 53.35], [90.68, 53.32], [90.53, 52.97], [90.0, 52.75], [89.47, 52.97], [89.25, 53.5], [89.46, 54.0], [89.25, 54.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.532932156675372}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.841346981902203}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.470784371432785, 5.583261977338566, 6.79208329795722]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.1388391401119975, 3.5251262685227402, 5.6773341991058714]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.133559172086355, -7.16674440962814, -6.223737363992128]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.978938910330157, -9.532932156675372, -6.951868695059773]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6044938708064493, -1.6443976882148579, -1.474051767688478]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.102863739194593, -2.055870120971612, -1.6251257974720317]}}