{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:35:15.147953", "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": "2023-May-21_to_2023-May-26_317.5_66.0"}, "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": 2023050000590}, "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 21 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 26 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 223398.5395891831}, "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": ["Greenland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": 66.0}, "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": 317.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "317.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 314.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 331.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 63.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 74.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.75, 64.5], [-43.53, 65.03], [-43.0, 65.25], [-42.75, 65.15], [-42.5, 65.25], [-41.97, 65.03], [-41.75, 64.5], [-41.85, 64.25], [-41.75, 64.0], [-41.97, 63.47], [-42.5, 63.25], [-43.03, 63.47], [-43.18, 63.82], [-43.53, 63.97], [-43.75, 64.5]]]]}, "2023-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-45.03, 66.53], [-44.5, 66.75], [-44.25, 66.65], [-44.0, 66.75], [-43.75, 66.65], [-43.5, 66.75], [-43.25, 66.65], [-43.0, 66.75], [-42.75, 66.65], [-42.5, 66.75], [-41.97, 66.53], [-41.75, 66.0], [-41.85, 65.75], [-41.82, 65.68], [-41.47, 65.53], [-41.25, 65.0], [-41.35, 64.75], [-41.25, 64.5], [-41.47, 63.97], [-41.82, 63.82], [-41.97, 63.47], [-42.5, 63.25], [-43.03, 63.47], [-43.18, 63.82], [-43.53, 63.97], [-43.68, 64.32], [-44.03, 64.47], [-44.18, 64.82], [-44.53, 64.97], [-44.68, 65.32], [-45.03, 65.47], [-45.25, 66.0], [-45.03, 66.53]]], [[[-29.53, 73.47], [-29.75, 74.0], [-29.53, 74.53], [-29.0, 74.75], [-28.47, 74.53], [-28.25, 74.0], [-28.47, 73.47], [-29.0, 73.25], [-29.53, 73.47]]]]}, "2023-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-45.03, 66.53], [-44.5, 66.75], [-44.25, 66.65], [-44.0, 66.75], [-43.75, 66.65], [-43.5, 66.75], [-43.25, 66.65], [-43.0, 66.75], [-42.75, 66.65], [-42.5, 66.75], [-41.97, 66.53], [-41.75, 66.0], [-41.85, 65.75], [-41.82, 65.68], [-41.47, 65.53], [-41.25, 65.0], [-41.35, 64.75], [-41.25, 64.5], [-41.47, 63.97], [-41.82, 63.82], [-41.97, 63.47], [-42.5, 63.25], [-43.03, 63.47], [-43.18, 63.82], [-43.53, 63.97], [-43.68, 64.32], [-44.03, 64.47], [-44.18, 64.82], [-44.53, 64.97], [-44.68, 65.32], [-45.03, 65.47], [-45.25, 66.0], [-45.03, 66.53]]], [[[-32.03, 74.03], [-31.5, 74.25], [-31.25, 74.15], [-31.18, 74.18], [-31.15, 74.25], [-31.25, 74.5], [-31.03, 75.03], [-30.5, 75.25], [-30.25, 75.15], [-30.0, 75.25], [-29.75, 75.15], [-29.5, 75.25], [-28.97, 75.03], [-28.82, 74.68], [-28.47, 74.53], [-28.25, 74.0], [-28.47, 73.47], [-29.0, 73.25], [-29.43, 73.43], [-29.25, 73.0], [-29.35, 72.75], [-29.25, 72.5], [-29.47, 71.97], [-30.0, 71.75], [-30.25, 71.85], [-30.5, 71.75], [-31.03, 71.97], [-31.18, 72.32], [-31.53, 72.47], [-31.68, 72.82], [-32.03, 72.97], [-32.25, 73.5], [-32.03, 74.03]]]]}, "2023-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.25, 70.0], [-46.03, 70.53], [-45.68, 70.68], [-45.65, 70.75], [-45.75, 71.0], [-45.65, 71.25], [-45.75, 71.5], [-45.53, 72.03], [-45.18, 72.18], [-45.03, 72.53], [-44.5, 72.75], [-44.25, 72.65], [-44.18, 72.68], [-44.03, 73.03], [-43.5, 73.25], [-43.25, 73.15], [-43.0, 73.25], [-42.75, 73.15], [-42.68, 73.18], [-42.53, 73.53], [-42.0, 73.75], [-41.75, 73.65], [-41.5, 73.75], [-41.25, 73.65], [-41.0, 73.75], [-40.75, 73.65], [-40.68, 73.68], [-40.53, 74.03], [-40.0, 74.25], [-39.75, 74.15], [-39.68, 74.18], [-39.53, 74.53], [-39.0, 74.75], [-38.75, 74.65], [-38.5, 74.75], [-38.25, 74.65], [-38.0, 74.75], [-37.75, 74.65], [-37.5, 74.75], [-37.25, 74.65], [-37.0, 74.75], [-36.75, 74.65], [-36.5, 74.75], [-36.25, 74.65], [-36.0, 74.75], [-35.75, 74.65], [-35.5, 74.75], [-35.25, 74.65], [-35.0, 74.75], [-34.75, 74.65], [-34.68, 74.68], [-34.53, 75.03], [-34.0, 75.25], [-33.47, 75.03], [-33.32, 74.68], [-33.25, 74.65], [-33.0, 74.75], [-32.47, 74.53], [-32.32, 74.18], [-32.25, 74.15], [-32.0, 74.25], [-31.75, 74.15], [-31.5, 74.25], [-31.25, 74.15], [-31.18, 74.18], [-31.15, 74.25], [-31.25, 74.5], [-31.03, 75.03], [-30.5, 75.25], [-30.25, 75.15], [-30.0, 75.25], [-29.75, 75.15], [-29.5, 75.25], [-28.97, 75.03], [-28.82, 74.68], [-28.47, 74.53], [-28.25, 74.0], [-28.47, 73.47], [-29.0, 73.25], [-29.43, 73.43], [-29.25, 73.0], [-29.35, 72.75], [-29.25, 72.5], [-29.47, 71.97], [-30.0, 71.75], [-30.25, 71.85], [-30.5, 71.75], [-31.0, 71.96], [-31.5, 71.75], [-31.75, 71.85], [-32.0, 71.75], [-32.25, 71.85], [-32.5, 71.75], [-32.75, 71.85], [-33.0, 71.75], [-33.53, 71.97], [-33.68, 72.32], [-33.75, 72.35], [-33.82, 72.32], [-33.97, 71.97], [-34.5, 71.75], [-34.75, 71.85], [-35.0, 71.75], [-35.25, 71.85], [-35.5, 71.75], [-35.75, 71.85], [-36.0, 71.75], [-36.25, 71.85], [-36.32, 71.82], [-36.47, 71.47], [-37.0, 71.25], [-37.25, 71.35], [-37.5, 71.25], [-37.75, 71.35], [-38.0, 71.25], [-38.53, 71.47], [-38.68, 71.82], [-38.75, 71.85], [-39.0, 71.75], [-39.25, 71.85], [-39.5, 71.75], [-39.75, 71.85], [-39.82, 71.82], [-39.97, 71.47], [-40.5, 71.25], [-40.75, 71.35], [-40.87, 71.3], [-40.75, 71.0], [-40.85, 70.75], [-40.82, 70.68], [-40.47, 70.53], [-40.25, 70.0], [-40.35, 69.75], [-40.32, 69.68], [-39.97, 69.53], [-39.82, 69.18], [-39.75, 69.15], [-39.5, 69.25], [-38.97, 69.03], [-38.75, 68.5], [-38.97, 67.97], [-39.5, 67.75], [-39.75, 67.85], [-39.82, 67.82], [-39.85, 67.75], [-39.75, 67.5], [-39.85, 67.25], [-39.75, 67.0], [-39.85, 66.75], [-39.82, 66.68], [-39.47, 66.53], [-39.25, 66.0], [-39.47, 65.47], [-40.0, 65.25], [-40.25, 65.35], [-40.5, 65.25], [-40.75, 65.35], [-41.0, 65.25], [-41.25, 65.35], [-41.37, 65.3], [-41.25, 65.0], [-41.35, 64.75], [-41.25, 64.5], [-41.47, 63.97], [-42.0, 63.75], [-42.25, 63.85], [-42.5, 63.75], [-42.75, 63.85], [-43.0, 63.75], [-43.53, 63.97], [-43.68, 64.32], [-44.03, 64.47], [-44.18, 64.82], [-44.53, 64.97], [-44.68, 65.32], [-45.03, 65.47], [-45.25, 66.0], [-45.15, 66.25], [-45.25, 66.5], [-45.15, 66.75], [-45.25, 67.0], [-45.15, 67.25], [-45.25, 67.5], [-45.04, 68.0], [-45.25, 68.5], [-45.15, 68.75], [-45.18, 68.82], [-45.53, 68.97], [-45.68, 69.32], [-46.03, 69.47], [-46.25, 70.0]]]]}, "2023-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.25, 70.0], [-46.03, 70.53], [-45.68, 70.68], [-45.65, 70.75], [-45.75, 71.0], [-45.65, 71.25], [-45.75, 71.5], [-45.53, 72.03], [-45.18, 72.18], [-45.03, 72.53], [-44.5, 72.75], [-44.25, 72.65], [-44.18, 72.68], [-44.03, 73.03], [-43.5, 73.25], [-43.25, 73.15], [-43.0, 73.25], [-42.75, 73.15], [-42.68, 73.18], [-42.53, 73.53], [-42.0, 73.75], [-41.75, 73.65], [-41.5, 73.75], [-41.25, 73.65], [-41.0, 73.75], [-40.75, 73.65], [-40.68, 73.68], [-40.53, 74.03], [-40.0, 74.25], [-39.75, 74.15], [-39.68, 74.18], [-39.53, 74.53], [-39.0, 74.75], [-38.75, 74.65], [-38.5, 74.75], [-38.25, 74.65], [-38.0, 74.75], [-37.75, 74.65], [-37.5, 74.75], [-37.25, 74.65], [-37.0, 74.75], [-36.75, 74.65], [-36.5, 74.75], [-36.25, 74.65], [-36.0, 74.75], [-35.75, 74.65], [-35.5, 74.75], [-35.25, 74.65], [-35.0, 74.75], [-34.75, 74.65], [-34.68, 74.68], [-34.53, 75.03], [-34.0, 75.25], [-33.47, 75.03], [-33.32, 74.68], [-33.25, 74.65], [-33.0, 74.75], [-32.47, 74.53], [-32.32, 74.18], [-32.25, 74.15], [-32.0, 74.25], [-31.75, 74.15], [-31.5, 74.25], [-31.25, 74.15], [-31.18, 74.18], [-31.15, 74.25], [-31.25, 74.5], [-31.03, 75.03], [-30.5, 75.25], [-30.25, 75.15], [-30.0, 75.25], [-29.75, 75.15], [-29.5, 75.25], [-28.97, 75.03], [-28.75, 74.5], [-28.97, 73.97], [-29.32, 73.82], [-29.46, 73.5], [-29.25, 73.0], [-29.35, 72.75], [-29.25, 72.5], [-29.47, 71.97], [-30.0, 71.75], [-30.25, 71.85], [-30.5, 71.75], [-31.0, 71.96], [-31.5, 71.75], [-31.75, 71.85], [-32.0, 71.75], [-32.25, 71.85], [-32.5, 71.75], [-32.75, 71.85], [-33.0, 71.75], [-33.53, 71.97], [-33.68, 72.32], [-33.75, 72.35], [-33.82, 72.32], [-33.97, 71.97], [-34.5, 71.75], [-34.75, 71.85], [-35.0, 71.75], [-35.25, 71.85], [-35.5, 71.75], [-35.75, 71.85], [-36.0, 71.75], [-36.25, 71.85], [-36.32, 71.82], [-36.47, 71.47], [-37.0, 71.25], [-37.25, 71.35], [-37.5, 71.25], [-37.75, 71.35], [-38.0, 71.25], [-38.53, 71.47], [-38.68, 71.82], [-38.75, 71.85], [-39.0, 71.75], [-39.25, 71.85], [-39.5, 71.75], [-39.75, 71.85], [-39.82, 71.82], [-39.97, 71.47], [-40.5, 71.25], [-40.75, 71.35], [-40.87, 71.3], [-40.75, 71.0], [-40.85, 70.75], [-40.82, 70.68], [-40.47, 70.53], [-40.25, 70.0], [-40.35, 69.75], [-40.32, 69.68], [-39.97, 69.53], [-39.82, 69.18], [-39.75, 69.15], [-39.5, 69.25], [-38.97, 69.03], [-38.75, 68.5], [-38.97, 67.97], [-39.5, 67.75], [-39.75, 67.85], [-39.82, 67.82], [-39.85, 67.75], [-39.75, 67.5], [-39.85, 67.25], [-39.75, 67.0], [-39.85, 66.75], [-39.82, 66.68], [-39.47, 66.53], [-39.25, 66.0], [-39.47, 65.47], [-40.0, 65.25], [-40.25, 65.35], [-40.5, 65.25], [-40.75, 65.35], [-41.0, 65.25], [-41.25, 65.35], [-41.5, 65.25], [-41.75, 65.35], [-41.82, 65.32], [-41.97, 64.97], [-42.5, 64.75], [-42.75, 64.85], [-43.0, 64.75], [-43.25, 64.85], [-43.5, 64.75], [-43.75, 64.85], [-44.0, 64.75], [-44.53, 64.97], [-44.68, 65.32], [-45.03, 65.47], [-45.25, 66.0], [-45.15, 66.25], [-45.25, 66.5], [-45.15, 66.75], [-45.25, 67.0], [-45.15, 67.25], [-45.25, 67.5], [-45.04, 68.0], [-45.25, 68.5], [-45.15, 68.75], [-45.18, 68.82], [-45.53, 68.97], [-45.68, 69.32], [-46.03, 69.47], [-46.25, 70.0]]]]}, "2023-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.25, 70.0], [-46.03, 70.53], [-45.68, 70.68], [-45.65, 70.75], [-45.75, 71.0], [-45.65, 71.25], [-45.75, 71.5], [-45.53, 72.03], [-45.18, 72.18], [-45.03, 72.53], [-44.5, 72.75], [-44.25, 72.65], [-44.18, 72.68], [-44.03, 73.03], [-43.5, 73.25], [-43.25, 73.15], [-43.0, 73.25], [-42.75, 73.15], [-42.68, 73.18], [-42.53, 73.53], [-42.0, 73.75], [-41.75, 73.65], [-41.5, 73.75], [-41.25, 73.65], [-41.0, 73.75], [-40.75, 73.65], [-40.68, 73.68], [-40.53, 74.03], [-40.0, 74.25], [-39.75, 74.15], [-39.68, 74.18], [-39.53, 74.53], [-39.0, 74.75], [-38.75, 74.65], [-38.5, 74.75], [-38.25, 74.65], [-38.0, 74.75], [-37.75, 74.65], [-37.5, 74.75], [-37.25, 74.65], [-37.0, 74.75], [-36.75, 74.65], [-36.5, 74.75], [-36.25, 74.65], [-36.0, 74.75], [-35.75, 74.65], [-35.5, 74.75], [-35.25, 74.65], [-35.0, 74.75], [-34.75, 74.65], [-34.68, 74.68], [-34.53, 75.03], [-34.0, 75.25], [-33.47, 75.03], [-33.32, 74.68], [-33.25, 74.65], [-33.0, 74.75], [-32.47, 74.53], [-32.32, 74.18], [-32.25, 74.15], [-32.0, 74.25], [-31.47, 74.03], [-31.25, 73.5], [-31.35, 73.25], [-31.32, 73.18], [-30.97, 73.03], [-30.75, 72.5], [-30.97, 71.97], [-31.5, 71.75], [-31.75, 71.85], [-32.0, 71.75], [-32.25, 71.85], [-32.5, 71.75], [-32.75, 71.85], [-33.0, 71.75], [-33.53, 71.97], [-33.68, 72.32], [-33.75, 72.35], [-33.82, 72.32], [-33.97, 71.97], [-34.5, 71.75], [-34.75, 71.85], [-35.0, 71.75], [-35.25, 71.85], [-35.5, 71.75], [-35.75, 71.85], [-36.0, 71.75], [-36.25, 71.85], [-36.32, 71.82], [-36.47, 71.47], [-37.0, 71.25], [-37.25, 71.35], [-37.5, 71.25], [-37.75, 71.35], [-38.0, 71.25], [-38.53, 71.47], [-38.68, 71.82], [-38.75, 71.85], [-39.0, 71.75], [-39.25, 71.85], [-39.5, 71.75], [-39.75, 71.85], [-39.82, 71.82], [-39.97, 71.47], [-40.5, 71.25], [-40.75, 71.35], [-40.87, 71.3], [-40.75, 71.0], [-40.85, 70.75], [-40.82, 70.68], [-40.47, 70.53], [-40.25, 70.0], [-40.35, 69.75], [-40.32, 69.68], [-39.97, 69.53], [-39.82, 69.18], [-39.75, 69.15], [-39.5, 69.25], [-38.97, 69.03], [-38.75, 68.5], [-38.97, 67.97], [-39.5, 67.75], [-39.75, 67.85], [-39.82, 67.82], [-39.85, 67.75], [-39.75, 67.5], [-39.85, 67.25], [-39.75, 67.0], [-39.85, 66.75], [-39.82, 66.68], [-39.47, 66.53], [-39.25, 66.0], [-39.47, 65.47], [-40.0, 65.25], [-40.25, 65.35], [-40.5, 65.25], [-40.75, 65.35], [-41.0, 65.25], [-41.25, 65.35], [-41.5, 65.25], [-41.75, 65.35], [-42.0, 65.25], [-42.25, 65.35], [-42.5, 65.25], [-43.03, 65.47], [-43.18, 65.82], [-43.25, 65.85], [-43.5, 65.75], [-43.75, 65.85], [-44.0, 65.75], [-44.25, 65.85], [-44.5, 65.75], [-45.03, 65.97], [-45.25, 66.5], [-45.15, 66.75], [-45.25, 67.0], [-45.15, 67.25], [-45.25, 67.5], [-45.04, 68.0], [-45.25, 68.5], [-45.15, 68.75], [-45.18, 68.82], [-45.53, 68.97], [-45.68, 69.32], [-46.03, 69.47], [-46.25, 70.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.707541508002379}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.067384145556649}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-14.41628627123879, -16.381583468291637, -18.633983343120974, -22.747223700130718, -23.277768524126884, -22.74225622433724]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-16.3846483480051, -18.886036790935663, -23.697775345857963, -26.89246585036767, -27.565434624247814, -26.933132425765507]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.274266843601784, -4.8176737568117085, -4.970966308570966, -6.066629536007482, -6.503045057515182, -5.91448905371214]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.616222438512239, -5.227167818991461, -6.013138822627127, -7.177203119519078, -7.707541508002379, -7.526053063673174]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.231975985321907, -1.3511742646194909, -1.3956430339991104, -1.5590905083302804, -1.6560774704547083, -1.5053808067824375]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2722895352728403, -1.4195859069365617, -1.6783262636275726, -1.9724666761436704, -1.9562389612800284, -1.9395268125045009]}}