{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:43:49.253331", "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": "2010-Jan-03_to_2010-Jan-06_238.5_-76.5"}, "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": 2010010000145}, "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": "January 03 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2010"}, "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": 50070.219410266356}, "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": ["Antarctica"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": -76.5}, "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": 238.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "238.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 234.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 243.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -79.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -75.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, -76.5], [-124.53, -75.97], [-124.0, -75.75], [-123.75, -75.85], [-123.68, -75.82], [-123.53, -75.47], [-123.18, -75.32], [-123.03, -74.97], [-122.5, -74.75], [-122.25, -74.85], [-122.0, -74.75], [-121.75, -74.85], [-121.5, -74.75], [-121.25, -74.85], [-121.0, -74.75], [-120.47, -74.97], [-120.32, -75.32], [-120.25, -75.35], [-120.0, -75.25], [-119.75, -75.35], [-119.5, -75.25], [-118.97, -75.47], [-118.82, -75.82], [-118.75, -75.85], [-118.5, -75.75], [-118.25, -75.85], [-118.0, -75.75], [-117.47, -75.97], [-117.32, -76.32], [-117.25, -76.35], [-117.0, -76.25], [-116.75, -76.35], [-116.5, -76.25], [-115.97, -76.47], [-115.75, -77.0], [-115.97, -77.53], [-116.5, -77.75], [-116.75, -77.65], [-117.0, -77.75], [-117.25, -77.65], [-117.32, -77.68], [-117.35, -77.75], [-117.25, -78.0], [-117.47, -78.53], [-117.82, -78.68], [-117.97, -79.03], [-118.5, -79.25], [-118.75, -79.15], [-118.82, -79.18], [-118.97, -79.53], [-119.5, -79.75], [-120.03, -79.53], [-120.18, -79.18], [-120.53, -79.03], [-120.68, -78.68], [-121.03, -78.53], [-121.18, -78.18], [-121.25, -78.15], [-121.5, -78.25], [-121.75, -78.15], [-122.0, -78.25], [-122.25, -78.15], [-122.5, -78.25], [-122.75, -78.15], [-123.0, -78.25], [-123.53, -78.03], [-123.68, -77.68], [-124.03, -77.53], [-124.18, -77.18], [-124.53, -77.03], [-124.75, -76.5]]]]}, "2010-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.53, -79.03], [-125.75, -78.5], [-125.53, -77.97], [-125.0, -77.75], [-124.75, -77.85], [-124.5, -77.75], [-124.25, -77.85], [-124.18, -77.82], [-124.04, -77.5], [-124.18, -77.18], [-124.53, -77.03], [-124.75, -76.5], [-124.53, -75.97], [-124.0, -75.75], [-123.75, -75.85], [-123.68, -75.82], [-123.53, -75.47], [-123.18, -75.32], [-123.03, -74.97], [-122.5, -74.75], [-122.25, -74.85], [-122.0, -74.75], [-121.75, -74.85], [-121.5, -74.75], [-121.25, -74.85], [-121.0, -74.75], [-120.47, -74.97], [-120.32, -75.32], [-120.25, -75.35], [-120.0, -75.25], [-119.75, -75.35], [-119.5, -75.25], [-118.97, -75.47], [-118.82, -75.82], [-118.75, -75.85], [-118.5, -75.75], [-118.25, -75.85], [-118.0, -75.75], [-117.47, -75.97], [-117.32, -76.32], [-117.25, -76.35], [-117.0, -76.25], [-116.75, -76.35], [-116.5, -76.25], [-115.97, -76.47], [-115.75, -77.0], [-115.97, -77.53], [-116.5, -77.75], [-116.75, -77.65], [-117.0, -77.75], [-117.25, -77.65], [-117.32, -77.68], [-117.35, -77.75], [-117.25, -78.0], [-117.47, -78.53], [-117.82, -78.68], [-117.97, -79.03], [-118.5, -79.25], [-118.75, -79.15], [-118.82, -79.18], [-118.97, -79.53], [-119.5, -79.75], [-120.03, -79.53], [-120.18, -79.18], [-120.53, -79.03], [-120.68, -78.68], [-121.0, -78.54], [-121.5, -78.75], [-121.75, -78.65], [-121.82, -78.68], [-121.97, -79.03], [-122.5, -79.25], [-122.75, -79.15], [-123.0, -79.25], [-123.25, -79.15], [-123.5, -79.25], [-123.75, -79.15], [-124.0, -79.25], [-124.25, -79.15], [-124.5, -79.25], [-124.75, -79.15], [-125.0, -79.25], [-125.53, -79.03]]]]}, "2010-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.53, -79.03], [-125.75, -78.5], [-125.53, -77.97], [-125.0, -77.75], [-124.75, -77.85], [-124.5, -77.75], [-124.25, -77.85], [-124.18, -77.82], [-124.04, -77.5], [-124.18, -77.18], [-124.53, -77.03], [-124.75, -76.5], [-124.53, -75.97], [-124.0, -75.75], [-123.75, -75.85], [-123.68, -75.82], [-123.53, -75.47], [-123.18, -75.32], [-123.03, -74.97], [-122.5, -74.75], [-122.25, -74.85], [-122.0, -74.75], [-121.75, -74.85], [-121.5, -74.75], [-121.25, -74.85], [-121.0, -74.75], [-120.47, -74.97], [-120.32, -75.32], [-120.25, -75.35], [-120.0, -75.25], [-119.75, -75.35], [-119.5, -75.25], [-118.97, -75.47], [-118.82, -75.82], [-118.75, -75.85], [-118.5, -75.75], [-118.25, -75.85], [-118.0, -75.75], [-117.47, -75.97], [-117.32, -76.32], [-117.25, -76.35], [-117.0, -76.25], [-116.75, -76.35], [-116.5, -76.25], [-115.97, -76.47], [-115.75, -77.0], [-115.97, -77.53], [-116.5, -77.75], [-116.75, -77.65], [-117.0, -77.75], [-117.25, -77.65], [-117.32, -77.68], [-117.35, -77.75], [-117.25, -78.0], [-117.47, -78.53], [-117.82, -78.68], [-117.97, -79.03], [-118.5, -79.25], [-118.75, -79.15], [-118.82, -79.18], [-118.97, -79.53], [-119.5, -79.75], [-120.03, -79.53], [-120.18, -79.18], [-120.53, -79.03], [-120.68, -78.68], [-121.0, -78.54], [-121.5, -78.75], [-121.75, -78.65], [-121.82, -78.68], [-121.97, -79.03], [-122.5, -79.25], [-122.75, -79.15], [-123.0, -79.25], [-123.25, -79.15], [-123.5, -79.25], [-123.75, -79.15], [-124.0, -79.25], [-124.25, -79.15], [-124.5, -79.25], [-124.75, -79.15], [-125.0, -79.25], [-125.53, -79.03]]]]}, "2010-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.53, -79.03], [-125.75, -78.5], [-125.53, -77.97], [-125.0, -77.75], [-124.75, -77.85], [-124.5, -77.75], [-124.25, -77.85], [-124.18, -77.82], [-124.03, -77.47], [-123.68, -77.32], [-123.54, -77.0], [-123.75, -76.5], [-123.53, -75.97], [-123.0, -75.75], [-122.75, -75.85], [-122.5, -75.75], [-122.25, -75.85], [-122.0, -75.75], [-121.75, -75.85], [-121.5, -75.75], [-121.25, -75.85], [-121.0, -75.75], [-120.75, -75.85], [-120.5, -75.75], [-120.25, -75.85], [-120.0, -75.75], [-119.75, -75.85], [-119.5, -75.75], [-118.97, -75.97], [-118.82, -76.32], [-118.75, -76.35], [-118.5, -76.25], [-118.25, -76.35], [-118.0, -76.25], [-117.47, -76.47], [-117.25, -77.0], [-117.47, -77.53], [-118.0, -77.75], [-118.25, -77.65], [-118.5, -77.75], [-118.75, -77.65], [-119.0, -77.75], [-119.25, -77.65], [-119.5, -77.75], [-119.75, -77.65], [-119.82, -77.68], [-119.97, -78.03], [-120.5, -78.25], [-120.75, -78.15], [-120.82, -78.18], [-120.97, -78.53], [-121.5, -78.75], [-121.75, -78.65], [-121.82, -78.68], [-121.97, -79.03], [-122.5, -79.25], [-122.75, -79.15], [-123.0, -79.25], [-123.25, -79.15], [-123.5, -79.25], [-123.75, -79.15], [-124.0, -79.25], [-124.25, -79.15], [-124.5, -79.25], [-124.75, -79.15], [-125.0, -79.25], [-125.53, -79.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.930473304600525}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.155410470277518}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.58563566258053, -19.870825613643774, -19.481695216945866, -19.87113164710732]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-21.207677055189947, -22.43601348901629, -21.758507265429074, -21.346844165245358]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9590628970503046, -4.421312725892069, -4.091779619241098, -4.081345813302768]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.837291820356484, -4.930473304600525, -4.782628376179275, -4.460305171348125]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.353063763446467, -1.491337932597336, -1.358688002857701, -1.286280871677996]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6737027485321436, -1.7096973749918833, -1.504664072195474, -1.383031088969334]}}