{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:28.911807", "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": "2019-Apr-01_to_2019-Apr-03_281.0_33.5"}, "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": 2019040000093}, "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 01 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 03 2019"}, "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": 69102.69079965791}, "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": 33.5}, "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": 278.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 282.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.0, 32.75], [-80.75, 32.65], [-80.68, 32.68], [-80.53, 33.03], [-80.18, 33.18], [-80.12, 33.3], [-80.25, 33.35], [-80.5, 33.25], [-81.03, 33.47], [-81.25, 34.0], [-81.15, 34.25], [-81.25, 34.5], [-81.15, 34.75], [-81.25, 35.0], [-81.03, 35.53], [-80.5, 35.75], [-80.25, 35.65], [-80.0, 35.75], [-79.75, 35.65], [-79.68, 35.68], [-79.53, 36.03], [-79.0, 36.25], [-78.75, 36.15], [-78.5, 36.25], [-77.97, 36.03], [-77.82, 35.68], [-77.75, 35.65], [-77.5, 35.75], [-76.97, 35.53], [-76.75, 35.0], [-76.85, 34.75], [-76.75, 34.5], [-76.97, 33.97], [-77.32, 33.82], [-77.47, 33.47], [-77.82, 33.32], [-77.97, 32.97], [-78.32, 32.82], [-78.47, 32.47], [-79.0, 32.25], [-79.25, 32.35], [-79.32, 32.32], [-79.47, 31.97], [-79.82, 31.82], [-79.97, 31.47], [-80.5, 31.25], [-80.75, 31.35], [-80.82, 31.32], [-80.97, 30.97], [-81.5, 30.75], [-82.03, 30.97], [-82.25, 31.5], [-82.03, 32.03], [-81.68, 32.18], [-81.53, 32.53], [-81.0, 32.75]]]]}, "2019-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.0, 32.75], [-80.75, 32.65], [-80.68, 32.68], [-80.53, 33.03], [-80.18, 33.18], [-80.12, 33.3], [-80.25, 33.35], [-80.5, 33.25], [-81.03, 33.47], [-81.25, 34.0], [-81.15, 34.25], [-81.25, 34.5], [-81.15, 34.75], [-81.25, 35.0], [-81.03, 35.53], [-80.5, 35.75], [-80.25, 35.65], [-80.0, 35.75], [-79.75, 35.65], [-79.68, 35.68], [-79.53, 36.03], [-79.0, 36.25], [-78.75, 36.15], [-78.5, 36.25], [-77.97, 36.03], [-77.82, 35.68], [-77.75, 35.65], [-77.5, 35.75], [-76.97, 35.53], [-76.75, 35.0], [-76.85, 34.75], [-76.75, 34.5], [-76.97, 33.97], [-77.32, 33.82], [-77.47, 33.47], [-77.82, 33.32], [-77.97, 32.97], [-78.32, 32.82], [-78.47, 32.47], [-79.0, 32.25], [-79.25, 32.35], [-79.32, 32.32], [-79.47, 31.97], [-79.82, 31.82], [-79.97, 31.47], [-80.5, 31.25], [-80.75, 31.35], [-80.82, 31.32], [-80.97, 30.97], [-81.5, 30.75], [-82.03, 30.97], [-82.25, 31.5], [-82.03, 32.03], [-81.68, 32.18], [-81.53, 32.53], [-81.0, 32.75]]]]}, "2019-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.0, 32.75], [-80.75, 32.65], [-80.68, 32.68], [-80.53, 33.03], [-80.18, 33.18], [-80.12, 33.3], [-80.25, 33.35], [-80.5, 33.25], [-81.03, 33.47], [-81.25, 34.0], [-81.15, 34.25], [-81.25, 34.5], [-81.15, 34.75], [-81.25, 35.0], [-81.03, 35.53], [-80.5, 35.75], [-80.25, 35.65], [-80.0, 35.75], [-79.75, 35.65], [-79.68, 35.68], [-79.53, 36.03], [-79.0, 36.25], [-78.75, 36.15], [-78.5, 36.25], [-77.97, 36.03], [-77.82, 35.68], [-77.75, 35.65], [-77.5, 35.75], [-76.97, 35.53], [-76.75, 35.0], [-76.85, 34.75], [-76.75, 34.5], [-76.97, 33.97], [-77.32, 33.82], [-77.47, 33.47], [-77.82, 33.32], [-77.97, 32.97], [-78.32, 32.82], [-78.47, 32.47], [-79.0, 32.25], [-79.25, 32.35], [-79.32, 32.32], [-79.47, 31.97], [-79.82, 31.82], [-79.97, 31.47], [-80.5, 31.25], [-80.75, 31.35], [-80.82, 31.32], [-80.97, 30.97], [-81.5, 30.75], [-82.03, 30.97], [-82.25, 31.5], [-82.03, 32.03], [-81.68, 32.18], [-81.53, 32.53], [-81.0, 32.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.453391728779252}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.228312669528869}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.767406928693504, 8.088770208887183, 10.304198196383538]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.948018305185883, 4.352016893868438, 8.898916827912103]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.1286456482802905, -7.880692512680254, -5.675599847626062]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.806843740583702, -10.453391728779252, -6.97498406797564]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.444094558063889, -2.231423419121214, -1.6764980786406756]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6215186967637978, -2.530393129774381, -2.4697427108434127]}}