{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:11.290619", "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": "2012-Apr-22_to_2012-Apr-24_283.0_41.5"}, "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": 2012040001135}, "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": "April 22 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 2012"}, "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": 62036.66488733977}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "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": 41.5}, "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": 283.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "283.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 280.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 284.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.03, 42.53], [-79.5, 42.75], [-79.25, 42.65], [-79.18, 42.68], [-79.03, 43.03], [-78.68, 43.18], [-78.53, 43.53], [-78.0, 43.75], [-77.75, 43.65], [-77.5, 43.75], [-77.25, 43.65], [-77.0, 43.75], [-76.75, 43.65], [-76.5, 43.75], [-75.97, 43.53], [-75.75, 43.0], [-75.85, 42.75], [-75.75, 42.5], [-75.85, 42.25], [-75.82, 42.18], [-75.47, 42.03], [-75.25, 41.5], [-75.47, 40.97], [-75.82, 40.82], [-75.97, 40.47], [-76.5, 40.25], [-76.75, 40.35], [-77.0, 40.25], [-77.25, 40.35], [-77.5, 40.25], [-78.03, 40.47], [-78.18, 40.82], [-78.25, 40.85], [-78.5, 40.75], [-78.75, 40.85], [-79.0, 40.75], [-79.25, 40.85], [-79.5, 40.75], [-80.03, 40.97], [-80.25, 41.5], [-80.15, 41.75], [-80.25, 42.0], [-80.03, 42.53]]]]}, "2012-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.03, 42.53], [-79.5, 42.75], [-79.25, 42.65], [-79.18, 42.68], [-79.03, 43.03], [-78.68, 43.18], [-78.53, 43.53], [-78.0, 43.75], [-77.75, 43.65], [-77.5, 43.75], [-77.25, 43.65], [-77.0, 43.75], [-76.75, 43.65], [-76.5, 43.75], [-75.97, 43.53], [-75.75, 43.0], [-75.85, 42.75], [-75.75, 42.5], [-75.85, 42.25], [-75.82, 42.18], [-75.47, 42.03], [-75.25, 41.5], [-75.47, 40.97], [-75.82, 40.82], [-75.97, 40.47], [-76.5, 40.25], [-76.75, 40.35], [-77.0, 40.25], [-77.25, 40.35], [-77.5, 40.25], [-78.03, 40.47], [-78.18, 40.82], [-78.25, 40.85], [-78.5, 40.75], [-78.75, 40.85], [-79.0, 40.75], [-79.25, 40.85], [-79.5, 40.75], [-80.03, 40.97], [-80.25, 41.5], [-80.15, 41.75], [-80.25, 42.0], [-80.03, 42.53]]]]}, "2012-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.03, 42.53], [-79.5, 42.75], [-79.25, 42.65], [-79.18, 42.68], [-79.03, 43.03], [-78.68, 43.18], [-78.53, 43.53], [-78.0, 43.75], [-77.75, 43.65], [-77.5, 43.75], [-77.25, 43.65], [-77.0, 43.75], [-76.75, 43.65], [-76.5, 43.75], [-75.97, 43.53], [-75.75, 43.0], [-75.85, 42.75], [-75.75, 42.5], [-75.85, 42.25], [-75.82, 42.18], [-75.47, 42.03], [-75.25, 41.5], [-75.47, 40.97], [-75.82, 40.82], [-75.97, 40.47], [-76.5, 40.25], [-76.75, 40.35], [-77.0, 40.25], [-77.25, 40.35], [-77.5, 40.25], [-78.03, 40.47], [-78.18, 40.82], [-78.25, 40.85], [-78.5, 40.75], [-78.75, 40.85], [-79.0, 40.75], [-79.25, 40.85], [-79.5, 40.75], [-80.03, 40.97], [-80.25, 41.5], [-80.15, 41.75], [-80.25, 42.0], [-80.03, 42.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.632870101440972}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.76849399181562}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.69229785047645, 1.7371346284450624, 2.9585514743184262]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.077509317663953, 0.5574511666570174, 1.209801889468224]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.875940690995753, -7.862478564117514, -6.567062720333598]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.63454984092391, -8.632870101440972, -7.276982929175688]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3573090054420243, -1.7975092228509042, -1.4904262437262614]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5857766938254492, -2.087509653660369, -1.6202063808950158]}}