{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:50:46.602377", "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": "2024-Jan-18_to_2024-Jan-22_248.5_-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": 2024010000469}, "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 18 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 22 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 103851.65596270064}, "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": 248.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "248.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 240.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 254.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -81.25}, "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": {"2024-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.25, -77.5], [-118.03, -76.97], [-117.68, -76.82], [-117.53, -76.47], [-117.12, -76.3], [-117.25, -76.0], [-117.15, -75.75], [-117.25, -75.5], [-117.03, -74.97], [-116.5, -74.75], [-116.25, -74.85], [-116.0, -74.75], [-115.75, -74.85], [-115.5, -74.75], [-114.97, -74.97], [-114.75, -75.5], [-114.85, -75.75], [-114.82, -75.82], [-114.75, -75.85], [-114.5, -75.75], [-114.25, -75.85], [-114.0, -75.75], [-113.75, -75.85], [-113.5, -75.75], [-113.25, -75.85], [-113.0, -75.75], [-112.75, -75.85], [-112.5, -75.75], [-112.25, -75.85], [-112.0, -75.75], [-111.75, -75.85], [-111.5, -75.75], [-111.25, -75.85], [-111.0, -75.75], [-110.75, -75.85], [-110.5, -75.75], [-109.97, -75.97], [-109.75, -76.5], [-109.97, -77.03], [-110.5, -77.25], [-110.75, -77.15], [-111.0, -77.25], [-111.25, -77.15], [-111.5, -77.25], [-111.75, -77.15], [-112.0, -77.25], [-112.25, -77.15], [-112.37, -77.2], [-112.25, -77.5], [-112.35, -77.75], [-112.32, -77.82], [-112.25, -77.85], [-112.0, -77.75], [-111.75, -77.85], [-111.5, -77.75], [-111.25, -77.85], [-111.0, -77.75], [-110.47, -77.97], [-110.32, -78.32], [-110.25, -78.35], [-110.0, -78.25], [-109.47, -78.47], [-109.32, -78.82], [-108.97, -78.97], [-108.82, -79.32], [-108.47, -79.47], [-108.25, -80.0], [-108.46, -80.5], [-108.25, -81.0], [-108.47, -81.53], [-109.0, -81.75], [-109.25, -81.65], [-109.5, -81.75], [-109.75, -81.65], [-110.0, -81.75], [-110.25, -81.65], [-110.5, -81.75], [-110.75, -81.65], [-111.0, -81.75], [-111.25, -81.65], [-111.5, -81.75], [-111.75, -81.65], [-112.0, -81.75], [-112.25, -81.65], [-112.5, -81.75], [-112.75, -81.65], [-113.0, -81.75], [-113.25, -81.65], [-113.5, -81.75], [-113.75, -81.65], [-114.0, -81.75], [-114.25, -81.65], [-114.5, -81.75], [-114.75, -81.65], [-115.0, -81.75], [-115.53, -81.53], [-115.75, -81.0], [-115.65, -80.75], [-115.75, -80.5], [-115.65, -80.25], [-115.68, -80.18], [-116.03, -80.03], [-116.18, -79.68], [-116.25, -79.65], [-116.5, -79.75], [-117.03, -79.53], [-117.18, -79.18], [-117.53, -79.03], [-117.75, -78.5], [-117.65, -78.25], [-117.68, -78.18], [-118.03, -78.03], [-118.25, -77.5]]]]}, "2024-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.03, -76.53], [-120.25, -76.0], [-120.03, -75.47], [-119.5, -75.25], [-119.25, -75.35], [-119.18, -75.32], [-119.03, -74.97], [-118.5, -74.75], [-118.25, -74.85], [-118.0, -74.75], [-117.75, -74.85], [-117.5, -74.75], [-117.25, -74.85], [-117.0, -74.75], [-116.75, -74.85], [-116.5, -74.75], [-116.25, -74.85], [-116.0, -74.75], [-115.75, -74.85], [-115.5, -74.75], [-114.97, -74.97], [-114.82, -75.32], [-114.75, -75.35], [-114.5, -75.25], [-114.25, -75.35], [-114.0, -75.25], [-113.47, -75.47], [-113.32, -75.82], [-113.25, -75.85], [-113.0, -75.75], [-112.75, -75.85], [-112.5, -75.75], [-112.25, -75.85], [-112.0, -75.75], [-111.75, -75.85], [-111.5, -75.75], [-111.25, -75.85], [-111.0, -75.75], [-110.75, -75.85], [-110.5, -75.75], [-109.97, -75.97], [-109.75, -76.5], [-109.87, -76.8], [-109.75, -76.85], [-109.5, -76.75], [-108.97, -76.97], [-108.75, -77.5], [-108.97, -78.03], [-109.5, -78.25], [-109.75, -78.15], [-110.0, -78.25], [-109.47, -78.47], [-109.32, -78.82], [-108.97, -78.97], [-108.82, -79.32], [-108.47, -79.47], [-108.25, -80.0], [-108.46, -80.5], [-108.25, -81.0], [-108.47, -81.53], [-109.0, -81.75], [-109.25, -81.65], [-109.5, -81.75], [-109.75, -81.65], [-110.0, -81.75], [-110.25, -81.65], [-110.5, -81.75], [-110.75, -81.65], [-111.0, -81.75], [-111.25, -81.65], [-111.5, -81.75], [-111.75, -81.65], [-112.0, -81.75], [-112.25, -81.65], [-112.5, -81.75], [-112.75, -81.65], [-113.0, -81.75], [-113.25, -81.65], [-113.5, -81.75], [-113.75, -81.65], [-114.0, -81.75], [-114.25, -81.65], [-114.5, -81.75], [-114.75, -81.65], [-115.0, -81.75], [-115.53, -81.53], [-115.75, -81.0], [-115.65, -80.75], [-115.75, -80.5], [-115.65, -80.25], [-115.68, -80.18], [-116.03, -80.03], [-116.18, -79.68], [-116.25, -79.65], [-116.5, -79.75], [-117.03, -79.53], [-117.18, -79.18], [-117.53, -79.03], [-117.75, -78.5], [-117.65, -78.25], [-117.68, -78.18], [-118.03, -78.03], [-118.25, -77.5], [-118.03, -76.97], [-117.68, -76.82], [-117.65, -76.75], [-117.68, -76.68], [-117.75, -76.65], [-118.0, -76.75], [-118.25, -76.65], [-118.5, -76.75], [-118.75, -76.65], [-119.0, -76.75], [-119.25, -76.65], [-119.5, -76.75], [-120.03, -76.53]], [[-110.25, -78.15], [-110.37, -78.2], [-110.32, -78.32], [-110.25, -78.35], [-110.0, -78.25], [-110.25, -78.15]]]]}, "2024-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.03, -76.53], [-120.25, -76.0], [-120.03, -75.47], [-119.5, -75.25], [-119.25, -75.35], [-119.18, -75.32], [-119.03, -74.97], [-118.5, -74.75], [-118.25, -74.85], [-118.0, -74.75], [-117.75, -74.85], [-117.5, -74.75], [-117.25, -74.85], [-117.0, -74.75], [-116.75, -74.85], [-116.5, -74.75], [-116.25, -74.85], [-116.0, -74.75], [-115.75, -74.85], [-115.5, -74.75], [-115.25, -74.85], [-115.0, -74.75], [-114.75, -74.85], [-114.5, -74.75], [-113.97, -74.97], [-113.82, -75.32], [-113.47, -75.47], [-113.32, -75.82], [-113.25, -75.85], [-113.0, -75.75], [-112.75, -75.85], [-112.5, -75.75], [-112.25, -75.85], [-112.0, -75.75], [-111.75, -75.85], [-111.5, -75.75], [-111.25, -75.85], [-111.0, -75.75], [-110.75, -75.85], [-110.5, -75.75], [-110.25, -75.85], [-110.0, -75.75], [-109.47, -75.97], [-109.32, -76.32], [-109.25, -76.35], [-109.0, -76.25], [-108.75, -76.35], [-108.5, -76.25], [-108.25, -76.35], [-108.0, -76.25], [-107.75, -76.35], [-107.5, -76.25], [-107.25, -76.35], [-107.0, -76.25], [-106.75, -76.35], [-106.5, -76.25], [-106.25, -76.35], [-106.0, -76.25], [-105.47, -76.47], [-105.25, -77.0], [-105.47, -77.53], [-106.0, -77.75], [-106.25, -77.65], [-106.5, -77.75], [-106.75, -77.65], [-107.0, -77.75], [-107.25, -77.65], [-107.5, -77.75], [-107.75, -77.65], [-107.82, -77.68], [-107.97, -78.03], [-108.5, -78.25], [-108.75, -78.15], [-109.0, -78.25], [-109.25, -78.15], [-109.5, -78.25], [-109.75, -78.15], [-110.0, -78.25], [-109.47, -78.47], [-109.32, -78.82], [-108.97, -78.97], [-108.82, -79.32], [-108.47, -79.47], [-108.25, -80.0], [-108.46, -80.5], [-108.25, -81.0], [-108.47, -81.53], [-109.0, -81.75], [-109.25, -81.65], [-109.5, -81.75], [-109.75, -81.65], [-110.0, -81.75], [-110.25, -81.65], [-110.5, -81.75], [-110.75, -81.65], [-111.0, -81.75], [-111.25, -81.65], [-111.5, -81.75], [-111.75, -81.65], [-112.0, -81.75], [-112.25, -81.65], [-112.5, -81.75], [-112.75, -81.65], [-113.0, -81.75], [-113.25, -81.65], [-113.5, -81.75], [-113.75, -81.65], [-114.0, -81.75], [-114.25, -81.65], [-114.5, -81.75], [-114.75, -81.65], [-115.0, -81.75], [-115.53, -81.53], [-115.75, -81.0], [-115.65, -80.75], [-115.75, -80.5], [-115.65, -80.25], [-115.68, -80.18], [-116.03, -80.03], [-116.18, -79.68], [-116.25, -79.65], [-116.5, -79.75], [-117.03, -79.53], [-117.18, -79.18], [-117.53, -79.03], [-117.75, -78.5], [-117.65, -78.25], [-117.68, -78.18], [-118.03, -78.03], [-118.25, -77.5], [-118.03, -76.97], [-117.68, -76.82], [-117.65, -76.75], [-117.68, -76.68], [-117.75, -76.65], [-118.0, -76.75], [-118.25, -76.65], [-118.5, -76.75], [-118.75, -76.65], [-119.0, -76.75], [-119.25, -76.65], [-119.5, -76.75], [-120.03, -76.53]], [[-110.25, -78.15], [-110.37, -78.2], [-110.32, -78.32], [-110.25, -78.35], [-110.0, -78.25], [-110.25, -78.15]]]]}, "2024-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.03, -76.53], [-120.25, -76.0], [-120.03, -75.47], [-119.5, -75.25], [-119.25, -75.35], [-119.18, -75.32], [-119.03, -74.97], [-118.5, -74.75], [-118.25, -74.85], [-118.0, -74.75], [-117.75, -74.85], [-117.5, -74.75], [-117.25, -74.85], [-117.0, -74.75], [-116.75, -74.85], [-116.5, -74.75], [-116.25, -74.85], [-116.0, -74.75], [-115.75, -74.85], [-115.5, -74.75], [-115.25, -74.85], [-115.0, -74.75], [-114.75, -74.85], [-114.5, -74.75], [-113.97, -74.97], [-113.82, -75.32], [-113.47, -75.47], [-113.32, -75.82], [-112.97, -75.97], [-112.82, -76.32], [-112.75, -76.35], [-112.5, -76.25], [-112.25, -76.35], [-112.18, -76.32], [-112.03, -75.97], [-111.5, -75.75], [-111.25, -75.85], [-111.0, -75.75], [-110.75, -75.85], [-110.5, -75.75], [-110.25, -75.85], [-110.0, -75.75], [-109.47, -75.97], [-109.32, -76.32], [-109.25, -76.35], [-109.0, -76.25], [-108.75, -76.35], [-108.5, -76.25], [-108.25, -76.35], [-108.0, -76.25], [-107.75, -76.35], [-107.5, -76.25], [-107.25, -76.35], [-107.0, -76.25], [-106.75, -76.35], [-106.5, -76.25], [-106.25, -76.35], [-106.0, -76.25], [-105.47, -76.47], [-105.25, -77.0], [-105.47, -77.53], [-106.0, -77.75], [-106.25, -77.65], [-106.5, -77.75], [-106.75, -77.65], [-107.0, -77.75], [-107.25, -77.65], [-107.5, -77.75], [-107.75, -77.65], [-107.82, -77.68], [-107.97, -78.03], [-108.5, -78.25], [-108.75, -78.15], [-109.0, -78.25], [-109.25, -78.15], [-109.5, -78.25], [-109.75, -78.15], [-110.0, -78.25], [-110.25, -78.15], [-110.5, -78.25], [-110.75, -78.15], [-111.0, -78.25], [-111.25, -78.15], [-111.5, -78.25], [-111.75, -78.15], [-111.82, -78.18], [-111.97, -78.53], [-112.5, -78.75], [-112.75, -78.65], [-113.0, -78.75], [-113.25, -78.65], [-113.5, -78.75], [-113.75, -78.65], [-114.0, -78.75], [-114.25, -78.65], [-114.5, -78.75], [-114.75, -78.65], [-115.0, -78.75], [-115.53, -78.53], [-115.68, -78.18], [-115.75, -78.15], [-116.0, -78.25], [-116.53, -78.03], [-116.68, -77.68], [-117.03, -77.53], [-117.18, -77.18], [-117.53, -77.03], [-117.68, -76.68], [-117.75, -76.65], [-118.0, -76.75], [-118.25, -76.65], [-118.5, -76.75], [-118.75, -76.65], [-119.0, -76.75], [-119.25, -76.65], [-119.5, -76.75], [-120.03, -76.53]]]]}, "2024-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.25, -75.5], [-118.03, -74.97], [-117.5, -74.75], [-117.25, -74.85], [-117.0, -74.75], [-116.75, -74.85], [-116.5, -74.75], [-116.25, -74.85], [-116.0, -74.75], [-115.75, -74.85], [-115.5, -74.75], [-115.25, -74.85], [-115.0, -74.75], [-114.75, -74.85], [-114.5, -74.75], [-113.97, -74.97], [-113.75, -75.5], [-113.87, -75.8], [-113.75, -75.85], [-113.5, -75.75], [-112.97, -75.97], [-112.82, -76.32], [-112.75, -76.35], [-112.5, -76.25], [-112.25, -76.35], [-112.18, -76.32], [-112.03, -75.97], [-111.5, -75.75], [-111.25, -75.85], [-111.0, -75.75], [-110.75, -75.85], [-110.5, -75.75], [-110.25, -75.85], [-110.0, -75.75], [-109.47, -75.97], [-109.32, -76.32], [-109.25, -76.35], [-109.0, -76.25], [-108.75, -76.35], [-108.5, -76.25], [-108.25, -76.35], [-108.0, -76.25], [-107.75, -76.35], [-107.5, -76.25], [-107.25, -76.35], [-107.0, -76.25], [-106.75, -76.35], [-106.5, -76.25], [-106.25, -76.35], [-106.0, -76.25], [-105.47, -76.47], [-105.25, -77.0], [-105.47, -77.53], [-106.0, -77.75], [-106.25, -77.65], [-106.5, -77.75], [-106.75, -77.65], [-107.0, -77.75], [-107.25, -77.65], [-107.5, -77.75], [-107.75, -77.65], [-107.82, -77.68], [-107.97, -78.03], [-108.5, -78.25], [-108.75, -78.15], [-109.0, -78.25], [-109.25, -78.15], [-109.5, -78.25], [-109.75, -78.15], [-110.0, -78.25], [-110.25, -78.15], [-110.5, -78.25], [-110.75, -78.15], [-111.0, -78.25], [-111.25, -78.15], [-111.5, -78.25], [-112.03, -78.03], [-112.18, -77.68], [-112.25, -77.65], [-112.5, -77.75], [-112.75, -77.65], [-113.0, -77.75], [-113.53, -77.53], [-113.68, -77.18], [-113.75, -77.15], [-114.0, -77.25], [-114.53, -77.03], [-114.75, -76.5], [-114.62, -76.2], [-114.75, -76.15], [-115.0, -76.25], [-115.25, -76.15], [-115.5, -76.25], [-115.75, -76.15], [-115.87, -76.2], [-115.75, -76.5], [-115.97, -77.03], [-116.5, -77.25], [-116.75, -77.15], [-117.0, -77.25], [-117.53, -77.03], [-117.75, -76.5], [-117.62, -76.2], [-118.03, -76.03], [-118.25, -75.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.442381406833789}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.8020252934728225}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-20.713042263852742, -21.148820500913786, -21.008793454867742, -19.79552680884555, -19.658396116881505]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-22.12854492179119, -22.98070877217458, -23.575344242966025, -21.28676090335648, -21.42359829577933]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.465393912333756, -4.993344519541222, -4.913739637613678, -4.628696496615265, -4.9992416292448905]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.409208801473113, -5.820572514527072, -6.257867645392992, -5.402302563169258, -6.442381406833789]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3971298956988807, -1.6150876796364564, -1.623620925733805, -1.523727765231261, -1.6135669982994967]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.75949827147037, -1.8717711731463778, -2.028732423652061, -1.8186586584191837, -1.9775756210519242]}}