{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:05:22.787087", "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": "2016-May-15_to_2016-May-18_281.0_39.0"}, "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": 2016050000445}, "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 15 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 18 2016"}, "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": 53014.89383743597}, "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": 39.0}, "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": 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": 280.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 283.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.0, 40.25], [-78.75, 40.15], [-78.5, 40.25], [-78.25, 40.15], [-78.0, 40.25], [-77.75, 40.15], [-77.5, 40.25], [-77.25, 40.15], [-77.0, 40.25], [-76.75, 40.15], [-76.5, 40.25], [-75.97, 40.03], [-75.75, 39.5], [-75.85, 39.25], [-75.75, 39.0], [-75.97, 38.47], [-76.32, 38.32], [-76.35, 38.25], [-76.25, 38.0], [-76.47, 37.47], [-77.0, 37.25], [-77.5, 37.46], [-78.0, 37.25], [-78.25, 37.35], [-78.5, 37.25], [-79.03, 37.47], [-79.25, 38.0], [-79.15, 38.25], [-79.18, 38.32], [-79.25, 38.35], [-79.5, 38.25], [-80.03, 38.47], [-80.25, 39.0], [-80.03, 39.53], [-79.68, 39.68], [-79.53, 40.03], [-79.0, 40.25]]]]}, "2016-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.0, 40.25], [-78.75, 40.15], [-78.5, 40.25], [-78.25, 40.15], [-78.0, 40.25], [-77.75, 40.15], [-77.5, 40.25], [-77.25, 40.15], [-77.0, 40.25], [-76.75, 40.15], [-76.5, 40.25], [-75.97, 40.03], [-75.75, 39.5], [-75.85, 39.25], [-75.75, 39.0], [-75.97, 38.47], [-76.32, 38.32], [-76.35, 38.25], [-76.25, 38.0], [-76.47, 37.47], [-77.0, 37.25], [-77.3, 37.38], [-77.47, 36.97], [-78.0, 36.75], [-78.25, 36.85], [-78.5, 36.75], [-79.03, 36.97], [-79.25, 37.5], [-79.15, 37.75], [-79.25, 38.0], [-79.15, 38.25], [-79.18, 38.32], [-79.25, 38.35], [-79.5, 38.25], [-80.03, 38.47], [-80.25, 39.0], [-80.03, 39.53], [-79.68, 39.68], [-79.53, 40.03], [-79.0, 40.25]]]]}, "2016-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.0, 40.25], [-78.75, 40.15], [-78.5, 40.25], [-78.25, 40.15], [-78.0, 40.25], [-77.75, 40.15], [-77.5, 40.25], [-77.25, 40.15], [-77.0, 40.25], [-76.75, 40.15], [-76.5, 40.25], [-75.97, 40.03], [-75.75, 39.5], [-75.85, 39.25], [-75.75, 39.0], [-75.97, 38.47], [-76.32, 38.32], [-76.35, 38.25], [-76.25, 38.0], [-76.47, 37.47], [-77.0, 37.25], [-77.3, 37.38], [-77.47, 36.97], [-78.0, 36.75], [-78.25, 36.85], [-78.5, 36.75], [-79.03, 36.97], [-79.25, 37.5], [-79.15, 37.75], [-79.25, 38.0], [-79.15, 38.25], [-79.18, 38.32], [-79.25, 38.35], [-79.5, 38.25], [-80.03, 38.47], [-80.25, 39.0], [-80.03, 39.53], [-79.68, 39.68], [-79.53, 40.03], [-79.0, 40.25]]]]}, "2016-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.75, 39.0], [-79.53, 39.53], [-79.0, 39.75], [-78.47, 39.53], [-78.32, 39.18], [-78.25, 39.15], [-78.0, 39.25], [-77.47, 39.03], [-77.25, 38.5], [-77.35, 38.25], [-77.25, 38.0], [-77.35, 37.75], [-77.25, 37.5], [-77.47, 36.97], [-78.0, 36.75], [-78.25, 36.85], [-78.5, 36.75], [-79.03, 36.97], [-79.25, 37.5], [-79.15, 37.75], [-79.25, 38.0], [-79.15, 38.25], [-79.18, 38.32], [-79.53, 38.47], [-79.75, 39.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.360496565671781}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.9749232420786}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.593410027682125, 10.968431511918311, 12.110873451024759, 12.473010417072032]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.123184901967704, 6.374536568739927, 7.9878677987367155, 9.59422006062448]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.316443948073475, -6.370857921889462, -5.400026026037168, -5.561603481675036]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.360496565671781, -7.2694828735274655, -5.830238493374225, -5.838604027226722]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6093584206692213, -1.6512355427815826, -1.3966767557297977, -1.4038476359429986]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1001978216021153, -1.7738459386844816, -1.5160774177849805, -1.4825111423745074]}}