{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:51:47.968371", "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-08_to_2024-May-11_327.5_72.0"}, "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": 2024050000241}, "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 08 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 11 2024"}, "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": 60799.85270322758}, "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": 72.0}, "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": 327.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "327.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 322.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 329.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 68.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 74.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-37.75, 69.5], [-37.53, 70.03], [-37.0, 70.25], [-36.75, 70.15], [-36.68, 70.18], [-36.53, 70.53], [-36.0, 70.75], [-35.75, 70.65], [-35.5, 70.75], [-35.25, 70.65], [-35.18, 70.68], [-35.03, 71.03], [-34.68, 71.18], [-34.65, 71.25], [-34.68, 71.32], [-34.75, 71.35], [-35.0, 71.25], [-35.53, 71.47], [-35.75, 72.0], [-35.65, 72.25], [-35.68, 72.32], [-35.75, 72.35], [-36.0, 72.25], [-36.53, 72.47], [-36.75, 73.0], [-36.53, 73.53], [-36.0, 73.75], [-35.75, 73.65], [-35.68, 73.68], [-35.53, 74.03], [-35.0, 74.25], [-34.75, 74.15], [-34.5, 74.25], [-34.25, 74.15], [-34.0, 74.25], [-33.75, 74.15], [-33.68, 74.18], [-33.53, 74.53], [-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], [-30.97, 74.03], [-30.75, 73.5], [-30.85, 73.25], [-30.75, 73.0], [-30.85, 72.75], [-30.75, 72.5], [-30.85, 72.25], [-30.75, 72.0], [-30.97, 71.47], [-31.32, 71.32], [-31.35, 71.25], [-31.25, 71.0], [-31.47, 70.47], [-32.0, 70.25], [-32.25, 70.35], [-32.5, 70.25], [-32.75, 70.35], [-33.0, 70.25], [-33.25, 70.35], [-33.5, 70.25], [-33.75, 70.35], [-33.82, 70.32], [-33.85, 70.25], [-33.75, 70.0], [-33.97, 69.47], [-34.32, 69.32], [-34.35, 69.25], [-34.25, 69.0], [-34.47, 68.47], [-35.0, 68.25], [-35.25, 68.35], [-35.5, 68.25], [-35.75, 68.35], [-36.0, 68.25], [-36.25, 68.35], [-36.5, 68.25], [-37.03, 68.47], [-37.18, 68.82], [-37.53, 68.97], [-37.75, 69.5]]]]}, "2024-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-37.75, 69.5], [-37.53, 70.03], [-37.0, 70.25], [-36.75, 70.15], [-36.68, 70.18], [-36.53, 70.53], [-36.0, 70.75], [-35.75, 70.65], [-35.5, 70.75], [-35.25, 70.65], [-35.18, 70.68], [-35.03, 71.03], [-34.68, 71.18], [-34.65, 71.25], [-34.68, 71.32], [-34.75, 71.35], [-35.0, 71.25], [-35.53, 71.47], [-35.75, 72.0], [-35.65, 72.25], [-35.68, 72.32], [-35.75, 72.35], [-36.0, 72.25], [-36.53, 72.47], [-36.75, 73.0], [-36.53, 73.53], [-36.0, 73.75], [-35.75, 73.65], [-35.68, 73.68], [-35.53, 74.03], [-35.0, 74.25], [-34.75, 74.15], [-34.5, 74.25], [-34.25, 74.15], [-34.0, 74.25], [-33.75, 74.15], [-33.68, 74.18], [-33.53, 74.53], [-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], [-30.97, 74.03], [-30.75, 73.5], [-30.85, 73.25], [-30.82, 73.18], [-30.75, 73.15], [-30.5, 73.25], [-29.97, 73.03], [-29.75, 72.5], [-29.85, 72.25], [-29.75, 72.0], [-29.97, 71.47], [-30.5, 71.25], [-30.75, 71.35], [-31.0, 71.25], [-31.25, 71.35], [-31.32, 71.32], [-31.35, 71.25], [-31.25, 71.0], [-31.47, 70.47], [-32.0, 70.25], [-32.25, 70.35], [-32.5, 70.25], [-32.75, 70.35], [-33.0, 70.25], [-33.25, 70.35], [-33.5, 70.25], [-33.75, 70.35], [-33.82, 70.32], [-33.85, 70.25], [-33.75, 70.0], [-33.97, 69.47], [-34.32, 69.32], [-34.35, 69.25], [-34.25, 69.0], [-34.47, 68.47], [-35.0, 68.25], [-35.25, 68.35], [-35.5, 68.25], [-35.75, 68.35], [-36.0, 68.25], [-36.25, 68.35], [-36.5, 68.25], [-37.03, 68.47], [-37.18, 68.82], [-37.53, 68.97], [-37.75, 69.5]]]]}, "2024-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-37.75, 69.5], [-37.53, 70.03], [-37.0, 70.25], [-36.75, 70.15], [-36.68, 70.18], [-36.53, 70.53], [-36.0, 70.75], [-35.75, 70.65], [-35.5, 70.75], [-35.25, 70.65], [-35.18, 70.68], [-35.03, 71.03], [-34.68, 71.18], [-34.65, 71.25], [-34.68, 71.32], [-34.75, 71.35], [-35.0, 71.25], [-35.53, 71.47], [-35.75, 72.0], [-35.65, 72.25], [-35.68, 72.32], [-35.75, 72.35], [-36.0, 72.25], [-36.53, 72.47], [-36.75, 73.0], [-36.53, 73.53], [-36.0, 73.75], [-35.75, 73.65], [-35.68, 73.68], [-35.53, 74.03], [-35.0, 74.25], [-34.75, 74.15], [-34.5, 74.25], [-34.25, 74.15], [-34.0, 74.25], [-33.75, 74.15], [-33.68, 74.18], [-33.53, 74.53], [-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], [-30.97, 74.03], [-30.75, 73.5], [-30.85, 73.25], [-30.82, 73.18], [-30.75, 73.15], [-30.5, 73.25], [-29.97, 73.03], [-29.75, 72.5], [-29.85, 72.25], [-29.75, 72.0], [-29.97, 71.47], [-30.5, 71.25], [-30.75, 71.35], [-31.0, 71.25], [-31.25, 71.35], [-31.32, 71.32], [-31.35, 71.25], [-31.25, 71.0], [-31.47, 70.47], [-32.0, 70.25], [-32.25, 70.35], [-32.5, 70.25], [-32.75, 70.35], [-33.0, 70.25], [-33.25, 70.35], [-33.5, 70.25], [-33.75, 70.35], [-33.82, 70.32], [-33.85, 70.25], [-33.75, 70.0], [-33.97, 69.47], [-34.32, 69.32], [-34.35, 69.25], [-34.25, 69.0], [-34.47, 68.47], [-35.0, 68.25], [-35.25, 68.35], [-35.5, 68.25], [-35.75, 68.35], [-36.0, 68.25], [-36.25, 68.35], [-36.5, 68.25], [-37.03, 68.47], [-37.18, 68.82], [-37.53, 68.97], [-37.75, 69.5]]]]}, "2024-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-32.5, 73.25], [-32.25, 73.15], [-32.18, 73.18], [-32.03, 73.53], [-31.5, 73.75], [-30.97, 73.53], [-30.82, 73.18], [-30.75, 73.15], [-30.5, 73.25], [-29.97, 73.03], [-29.75, 72.5], [-29.85, 72.25], [-29.75, 72.0], [-29.97, 71.47], [-30.5, 71.25], [-30.75, 71.35], [-31.0, 71.25], [-31.25, 71.35], [-31.5, 71.25], [-31.75, 71.35], [-32.0, 71.25], [-32.25, 71.35], [-32.5, 71.25], [-32.75, 71.35], [-33.0, 71.25], [-33.53, 71.47], [-33.75, 72.0], [-33.53, 72.53], [-33.18, 72.68], [-33.03, 73.03], [-32.5, 73.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.050784505625757}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.3065346888081875}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-27.397257648261558, -28.92673488157186, -28.806314164822368, -25.074772855935294]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-30.087736039290206, -32.79730576542019, -33.24805465910592, -27.421678004720917]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.036219819324078, -8.00296798824521, -8.093701361589416, -5.7633496096259025]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.577599906437058, -9.20711393659954, -10.050784505625757, -6.213477470148746]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3380363604663545, -1.8176483367524428, -1.8556359347574312, -1.4001484876471644]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4430856019625187, -1.979248063766016, -2.1891366577053617, -1.4710088504317584]}}