{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:22.889068", "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": "2013-May-25_to_2013-May-27_281.0_34.5"}, "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": 2013050001017}, "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 25 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 27 2013"}, "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": 53444.45379884312}, "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": ["North Atlantic Ocean"]}, "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": 34.5}, "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": 281.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "281.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 279.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 283.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.53, 34.53], [-80.18, 34.68], [-80.15, 34.75], [-80.25, 35.0], [-80.03, 35.53], [-79.5, 35.75], [-79.0, 35.54], [-78.68, 35.68], [-78.53, 36.03], [-78.18, 36.18], [-78.03, 36.53], [-77.5, 36.75], [-77.25, 36.65], [-77.0, 36.75], [-76.47, 36.53], [-76.25, 36.0], [-76.35, 35.75], [-76.25, 35.5], [-76.47, 34.97], [-76.82, 34.82], [-76.97, 34.47], [-77.32, 34.32], [-77.35, 34.25], [-77.25, 34.0], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.5, 33.25], [-78.75, 33.35], [-78.82, 33.32], [-78.97, 32.97], [-79.32, 32.82], [-79.47, 32.47], [-80.0, 32.25], [-80.25, 32.35], [-80.5, 32.25], [-81.03, 32.47], [-81.25, 33.0], [-81.03, 33.53], [-80.62, 33.7], [-80.75, 34.0], [-80.53, 34.53]]]]}, "2013-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.53, 34.53], [-80.18, 34.68], [-80.15, 34.75], [-80.25, 35.0], [-80.03, 35.53], [-79.5, 35.75], [-79.0, 35.54], [-78.68, 35.68], [-78.53, 36.03], [-78.18, 36.18], [-78.03, 36.53], [-77.5, 36.75], [-77.25, 36.65], [-77.0, 36.75], [-76.47, 36.53], [-76.25, 36.0], [-76.35, 35.75], [-76.25, 35.5], [-76.47, 34.97], [-76.82, 34.82], [-76.97, 34.47], [-77.32, 34.32], [-77.35, 34.25], [-77.25, 34.0], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.5, 33.25], [-78.75, 33.35], [-78.82, 33.32], [-78.97, 32.97], [-79.32, 32.82], [-79.47, 32.47], [-80.0, 32.25], [-80.25, 32.35], [-80.5, 32.25], [-81.03, 32.47], [-81.25, 33.0], [-81.03, 33.53], [-80.62, 33.7], [-80.75, 34.0], [-80.53, 34.53]]]]}, "2013-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.53, 34.53], [-80.18, 34.68], [-80.15, 34.75], [-80.25, 35.0], [-80.03, 35.53], [-79.5, 35.75], [-79.0, 35.54], [-78.68, 35.68], [-78.53, 36.03], [-78.18, 36.18], [-78.03, 36.53], [-77.5, 36.75], [-77.25, 36.65], [-77.0, 36.75], [-76.47, 36.53], [-76.25, 36.0], [-76.35, 35.75], [-76.25, 35.5], [-76.47, 34.97], [-76.82, 34.82], [-76.97, 34.47], [-77.32, 34.32], [-77.35, 34.25], [-77.25, 34.0], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.5, 33.25], [-78.75, 33.35], [-78.82, 33.32], [-78.97, 32.97], [-79.32, 32.82], [-79.47, 32.47], [-80.0, 32.25], [-80.25, 32.35], [-80.5, 32.25], [-81.03, 32.47], [-81.25, 33.0], [-81.03, 33.53], [-80.62, 33.7], [-80.75, 34.0], [-80.53, 34.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.19580152969354}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.118729063068081}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.3871968893302, 17.74693443652177, 19.26259808460867]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.387992350887146, 15.945179633352438, 17.720504811328908]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.2998271838821465, -5.193712406397072, -3.8626475989250233]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.19580152969354, -6.05117823691603, -4.835529484853453]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.308163309862876, -1.9371349241904081, -1.4267296944656476]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5172283996371956, -2.160713785867669, -1.6694746659442556]}}