{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:11.807928", "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": "2021-Nov-23_to_2021-Nov-28_354.0_37.5"}, "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": 2021110000723}, "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": "November 23 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 28 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 51496.04262215361}, "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": ["Portugal", "Spain"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 37.5}, "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": 354.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 351.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 38.0], [-8.53, 38.53], [-8.18, 38.68], [-8.03, 39.03], [-7.5, 39.25], [-7.25, 39.15], [-7.0, 39.25], [-6.47, 39.03], [-6.32, 38.68], [-6.25, 38.65], [-6.0, 38.75], [-5.75, 38.65], [-5.5, 38.75], [-4.97, 38.53], [-4.75, 38.0], [-4.85, 37.75], [-4.75, 37.5], [-4.85, 37.25], [-4.75, 37.0], [-4.97, 36.47], [-5.5, 36.25], [-6.0, 36.46], [-6.5, 36.25], [-7.03, 36.47], [-7.18, 36.82], [-7.25, 36.85], [-7.5, 36.75], [-8.03, 36.97], [-8.18, 37.32], [-8.53, 37.47], [-8.75, 38.0]]]]}, "2021-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 38.0], [-8.53, 38.53], [-8.18, 38.68], [-8.03, 39.03], [-7.5, 39.25], [-7.25, 39.15], [-7.0, 39.25], [-6.47, 39.03], [-6.32, 38.68], [-6.25, 38.65], [-6.0, 38.75], [-5.75, 38.65], [-5.5, 38.75], [-4.97, 38.53], [-4.75, 38.0], [-4.85, 37.75], [-4.75, 37.5], [-4.85, 37.25], [-4.75, 37.0], [-4.97, 36.47], [-5.5, 36.25], [-6.0, 36.46], [-6.5, 36.25], [-7.03, 36.47], [-7.18, 36.82], [-7.25, 36.85], [-7.5, 36.75], [-8.03, 36.97], [-8.18, 37.32], [-8.53, 37.47], [-8.75, 38.0]]]]}, "2021-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.54, 37.5], [-8.75, 38.0], [-8.53, 38.53], [-8.18, 38.68], [-8.03, 39.03], [-7.5, 39.25], [-7.25, 39.15], [-7.0, 39.25], [-6.47, 39.03], [-6.32, 38.68], [-6.25, 38.65], [-6.0, 38.75], [-5.75, 38.65], [-5.5, 38.75], [-4.97, 38.53], [-4.75, 38.0], [-4.85, 37.75], [-4.75, 37.5], [-4.85, 37.25], [-4.75, 37.0], [-4.97, 36.47], [-5.5, 36.25], [-6.0, 36.46], [-6.5, 36.25], [-6.75, 36.35], [-7.0, 36.25], [-7.25, 36.35], [-7.32, 36.32], [-7.47, 35.97], [-8.0, 35.75], [-8.53, 35.97], [-8.75, 36.5], [-8.65, 36.75], [-8.75, 37.0], [-8.54, 37.5]]]]}, "2021-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.54, 37.5], [-8.75, 38.0], [-8.53, 38.53], [-8.18, 38.68], [-8.03, 39.03], [-7.5, 39.25], [-6.97, 39.03], [-6.75, 38.5], [-6.85, 38.25], [-6.82, 38.18], [-6.75, 38.15], [-6.5, 38.25], [-6.25, 38.15], [-6.0, 38.25], [-5.75, 38.15], [-5.5, 38.25], [-4.97, 38.03], [-4.75, 37.5], [-4.85, 37.25], [-4.75, 37.0], [-4.85, 36.75], [-4.75, 36.5], [-4.97, 35.97], [-5.5, 35.75], [-6.03, 35.97], [-6.18, 36.32], [-6.25, 36.35], [-6.5, 36.25], [-6.75, 36.35], [-7.0, 36.25], [-7.25, 36.35], [-7.32, 36.32], [-7.47, 35.97], [-8.0, 35.75], [-8.53, 35.97], [-8.75, 36.5], [-8.65, 36.75], [-8.75, 37.0], [-8.54, 37.5]]]]}, "2021-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.53, 37.53], [-8.0, 37.75], [-7.75, 37.65], [-7.68, 37.68], [-7.53, 38.03], [-7.0, 38.25], [-6.75, 38.15], [-6.5, 38.25], [-6.25, 38.15], [-6.0, 38.25], [-5.75, 38.15], [-5.5, 38.25], [-4.97, 38.03], [-4.75, 37.5], [-4.85, 37.25], [-4.75, 37.0], [-4.85, 36.75], [-4.75, 36.5], [-4.97, 35.97], [-5.5, 35.75], [-6.03, 35.97], [-6.18, 36.32], [-6.5, 36.46], [-7.0, 36.25], [-7.25, 36.35], [-7.32, 36.32], [-7.47, 35.97], [-8.0, 35.75], [-8.53, 35.97], [-8.75, 36.5], [-8.65, 36.75], [-8.75, 37.0], [-8.53, 37.53]]]]}, "2021-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.53, 37.53], [-8.0, 37.75], [-7.75, 37.65], [-7.68, 37.68], [-7.53, 38.03], [-7.0, 38.25], [-6.75, 38.15], [-6.5, 38.25], [-6.25, 38.15], [-6.0, 38.25], [-5.75, 38.15], [-5.5, 38.25], [-4.97, 38.03], [-4.75, 37.5], [-4.85, 37.25], [-4.75, 37.0], [-4.85, 36.75], [-4.75, 36.5], [-4.97, 35.97], [-5.5, 35.75], [-6.03, 35.97], [-6.18, 36.32], [-6.5, 36.46], [-7.0, 36.25], [-7.25, 36.35], [-7.32, 36.32], [-7.47, 35.97], [-8.0, 35.75], [-8.53, 35.97], [-8.75, 36.5], [-8.65, 36.75], [-8.75, 37.0], [-8.53, 37.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.340497107918679}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.527745178566977}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.841485684068971, 8.326752087211787, 9.493478271670426, 9.870218397325687, 10.560463777431153, 10.103474503117354]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.233722053062763, 6.4152395021421285, 6.518787205009232, 7.712851970988254, 8.377277674644517, 7.135481362934229]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.3512247185725075, -3.746533930823777, -3.2458673210947615, -3.3695720533479196, -2.9972639789306497, -3.3539013701616742]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.340497107918679, -4.459044243092137, -4.063367734444455, -4.217864882153606, -3.985383718625542, -5.109814098003142]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9034127065217143, -1.6770982297675807, -1.549088025017246, -1.6740588802410468, -1.5107221334337069, -1.7268557330646737]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.184958179217651, -2.052477497186311, -1.7108457771442913, -1.9242272532642564, -1.6843788162767905, -2.2005820497806554]}}