{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:49.780080", "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": "2013-Jul-07_to_2013-Jul-12_357.0_23.5"}, "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": 2013070000536}, "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": "July 07 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 12 2013"}, "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": 379541.63526064844}, "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": ["Algeria", "Mali", "Mauritania"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": 23.5}, "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": 357.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "357.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 360.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-07-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.53, 26.03], [0.0, 26.25], [0.25, 26.15], [0.5, 26.25], [1.03, 26.03], [1.25, 25.5], [1.03, 24.97], [0.68, 24.82], [0.53, 24.47], [0.0, 24.25], [-0.53, 24.47], [-0.75, 25.0], [-0.65, 25.25], [-0.75, 25.5], [-0.53, 26.03]]]]}, "2013-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.65, 23.75], [-4.75, 24.0], [-4.65, 24.25], [-4.75, 24.5], [-4.65, 24.75], [-4.75, 25.0], [-4.53, 25.53], [-4.0, 25.75], [-3.5, 25.54], [-3.18, 25.68], [-3.03, 26.03], [-2.5, 26.25], [-2.0, 26.04], [-1.5, 26.25], [-1.25, 26.15], [-1.0, 26.25], [-0.75, 26.15], [-0.5, 26.25], [-0.25, 26.15], [0.0, 26.25], [0.25, 26.15], [0.5, 26.25], [1.03, 26.03], [1.25, 25.5], [1.15, 25.25], [1.25, 25.0], [1.15, 24.75], [1.25, 24.5], [1.15, 24.25], [1.25, 24.0], [1.03, 23.47], [0.68, 23.32], [0.53, 22.97], [0.0, 22.75], [-0.53, 22.97], [-0.68, 23.32], [-0.75, 23.35], [-0.82, 23.32], [-0.97, 22.97], [-1.32, 22.82], [-1.35, 22.75], [-1.25, 22.5], [-1.35, 22.25], [-1.25, 22.0], [-1.47, 21.47], [-2.0, 21.25], [-2.25, 21.35], [-2.5, 21.25], [-2.75, 21.35], [-3.0, 21.25], [-3.25, 21.35], [-3.5, 21.25], [-4.03, 21.47], [-4.25, 22.0], [-4.15, 22.25], [-4.18, 22.32], [-4.53, 22.47], [-4.75, 23.0], [-4.65, 23.25], [-4.75, 23.5], [-4.65, 23.75]]]]}, "2013-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.53, 22.03], [-7.18, 22.18], [-7.15, 22.25], [-7.25, 22.5], [-7.03, 23.03], [-6.68, 23.18], [-6.54, 23.5], [-6.75, 24.0], [-6.53, 24.53], [-6.18, 24.68], [-6.03, 25.03], [-5.68, 25.18], [-5.53, 25.53], [-5.0, 25.75], [-4.75, 25.65], [-4.5, 25.75], [-4.25, 25.65], [-4.0, 25.75], [-3.5, 25.54], [-3.18, 25.68], [-3.03, 26.03], [-2.5, 26.25], [-2.0, 26.04], [-1.5, 26.25], [-1.25, 26.15], [-1.0, 26.25], [-0.75, 26.15], [-0.5, 26.25], [-0.25, 26.15], [0.0, 26.25], [0.25, 26.15], [0.5, 26.25], [1.03, 26.03], [1.25, 25.5], [1.15, 25.25], [1.25, 25.0], [1.15, 24.75], [1.25, 24.5], [1.15, 24.25], [1.25, 24.0], [1.03, 23.47], [0.68, 23.32], [0.53, 22.97], [0.0, 22.75], [-0.53, 22.97], [-0.68, 23.32], [-0.75, 23.35], [-0.82, 23.32], [-0.97, 22.97], [-1.32, 22.82], [-1.35, 22.75], [-1.25, 22.5], [-1.35, 22.25], [-1.25, 22.0], [-1.35, 21.75], [-1.25, 21.5], [-1.35, 21.25], [-1.32, 21.18], [-1.25, 21.15], [-1.0, 21.25], [-0.47, 21.03], [-0.25, 20.5], [-0.47, 19.97], [-1.0, 19.75], [-1.25, 19.85], [-1.37, 19.8], [-1.25, 19.5], [-1.46, 19.0], [-1.25, 18.5], [-1.47, 17.97], [-2.0, 17.75], [-2.53, 17.97], [-2.68, 18.32], [-2.75, 18.35], [-3.0, 18.25], [-3.25, 18.35], [-3.5, 18.25], [-4.0, 18.46], [-4.5, 18.25], [-5.03, 18.47], [-5.18, 18.82], [-5.53, 18.97], [-5.68, 19.32], [-5.75, 19.35], [-6.0, 19.25], [-6.53, 19.47], [-6.75, 20.0], [-6.57, 20.43], [-7.0, 20.25], [-7.53, 20.47], [-7.75, 21.0], [-7.65, 21.25], [-7.75, 21.5], [-7.53, 22.03]]]]}, "2013-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.53, 22.03], [-7.18, 22.18], [-7.15, 22.25], [-7.25, 22.5], [-7.03, 23.03], [-6.68, 23.18], [-6.54, 23.5], [-6.75, 24.0], [-6.53, 24.53], [-6.18, 24.68], [-6.15, 24.75], [-6.25, 25.0], [-6.03, 25.53], [-5.5, 25.75], [-5.25, 25.65], [-5.0, 25.75], [-4.75, 25.65], [-4.5, 25.75], [-4.25, 25.65], [-4.0, 25.75], [-3.5, 25.54], [-3.18, 25.68], [-3.03, 26.03], [-2.5, 26.25], [-2.0, 26.04], [-1.5, 26.25], [-1.25, 26.15], [-1.0, 26.25], [-0.75, 26.15], [-0.5, 26.25], [-0.25, 26.15], [0.0, 26.25], [0.25, 26.15], [0.5, 26.25], [1.03, 26.03], [1.25, 25.5], [1.15, 25.25], [1.25, 25.0], [1.15, 24.75], [1.25, 24.5], [1.15, 24.25], [1.25, 24.0], [1.03, 23.47], [0.68, 23.32], [0.53, 22.97], [0.0, 22.75], [-0.53, 22.97], [-0.68, 23.32], [-0.75, 23.35], [-0.82, 23.32], [-0.97, 22.97], [-1.32, 22.82], [-1.35, 22.75], [-1.25, 22.5], [-1.35, 22.25], [-1.25, 22.0], [-1.35, 21.75], [-1.25, 21.5], [-1.35, 21.25], [-1.32, 21.18], [-1.25, 21.15], [-1.0, 21.25], [-0.47, 21.03], [-0.25, 20.5], [-0.47, 19.97], [-1.0, 19.75], [-1.25, 19.85], [-1.37, 19.8], [-1.25, 19.5], [-1.46, 19.0], [-1.25, 18.5], [-1.47, 17.97], [-2.0, 17.75], [-2.53, 17.97], [-2.68, 18.32], [-2.75, 18.35], [-3.0, 18.25], [-3.25, 18.35], [-3.5, 18.25], [-4.0, 18.46], [-4.5, 18.25], [-5.0, 18.46], [-5.5, 18.25], [-6.03, 18.47], [-6.25, 19.0], [-6.12, 19.3], [-6.53, 19.47], [-6.75, 20.0], [-6.57, 20.43], [-7.0, 20.25], [-7.53, 20.47], [-7.75, 21.0], [-7.65, 21.25], [-7.75, 21.5], [-7.53, 22.03]]]]}, "2013-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.53, 22.03], [-7.18, 22.18], [-7.15, 22.25], [-7.25, 22.5], [-7.03, 23.03], [-6.68, 23.18], [-6.54, 23.5], [-6.75, 24.0], [-6.53, 24.53], [-6.18, 24.68], [-6.15, 24.75], [-6.25, 25.0], [-6.03, 25.53], [-5.5, 25.75], [-5.25, 25.65], [-5.0, 25.75], [-4.75, 25.65], [-4.5, 25.75], [-4.25, 25.65], [-4.0, 25.75], [-3.5, 25.54], [-3.18, 25.68], [-3.03, 26.03], [-2.5, 26.25], [-2.0, 26.04], [-1.5, 26.25], [-1.0, 26.04], [-0.5, 26.25], [-0.25, 26.15], [0.0, 26.25], [0.53, 26.03], [0.75, 25.5], [0.65, 25.25], [0.75, 25.0], [0.65, 24.75], [0.75, 24.5], [0.53, 23.97], [0.18, 23.82], [0.03, 23.47], [-0.5, 23.25], [-0.75, 23.35], [-0.82, 23.32], [-0.97, 22.97], [-1.32, 22.82], [-1.35, 22.75], [-1.25, 22.5], [-1.35, 22.25], [-1.25, 22.0], [-1.35, 21.75], [-1.25, 21.5], [-1.35, 21.25], [-1.32, 21.18], [-1.25, 21.15], [-1.0, 21.25], [-0.47, 21.03], [-0.25, 20.5], [-0.47, 19.97], [-1.0, 19.75], [-1.25, 19.85], [-1.37, 19.8], [-1.25, 19.5], [-1.46, 19.0], [-1.25, 18.5], [-1.47, 17.97], [-2.0, 17.75], [-2.53, 17.97], [-2.68, 18.32], [-2.75, 18.35], [-3.0, 18.25], [-3.25, 18.35], [-3.5, 18.25], [-4.0, 18.46], [-4.5, 18.25], [-5.0, 18.46], [-5.5, 18.25], [-6.03, 18.47], [-6.25, 19.0], [-6.12, 19.3], [-6.53, 19.47], [-6.75, 20.0], [-6.57, 20.43], [-7.0, 20.25], [-7.53, 20.47], [-7.75, 21.0], [-7.65, 21.25], [-7.75, 21.5], [-7.53, 22.03]]]]}, "2013-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.03, 18.47], [-6.25, 19.0], [-6.03, 19.53], [-5.5, 19.75], [-4.97, 19.53], [-4.75, 19.0], [-4.97, 18.47], [-5.5, 18.25], [-6.03, 18.47]]], [[[-5.0, 23.75], [-4.75, 23.65], [-4.5, 23.75], [-4.25, 23.65], [-4.0, 23.75], [-3.75, 23.65], [-3.68, 23.68], [-3.53, 24.03], [-3.0, 24.25], [-2.47, 24.03], [-2.25, 23.5], [-2.47, 22.97], [-2.82, 22.82], [-2.96, 22.5], [-2.75, 22.0], [-2.85, 21.75], [-2.75, 21.5], [-2.97, 20.97], [-3.5, 20.75], [-4.0, 20.96], [-4.5, 20.75], [-4.75, 20.85], [-5.0, 20.75], [-5.53, 20.97], [-5.68, 21.32], [-5.75, 21.35], [-6.0, 21.25], [-6.53, 21.47], [-6.75, 22.0], [-6.53, 22.53], [-6.18, 22.68], [-6.03, 23.03], [-5.68, 23.18], [-5.53, 23.53], [-5.0, 23.75]]], [[[-6.25, 25.0], [-6.03, 25.53], [-5.5, 25.75], [-4.97, 25.53], [-4.75, 25.0], [-4.97, 24.47], [-5.5, 24.25], [-6.03, 24.47], [-6.25, 25.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.736562024008379}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6991165591514013}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [36.310239935700054, 34.652998077608515, 34.670467759548444, 34.3591561346808, 34.549550896960454, 35.78007549183968]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [36.21101139098619, 33.0268832417035, 32.18050237215601, 31.602760540750978, 30.488915928852805, 32.62157409290609]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.087425205689101, -3.1465553940449356, -2.5659481611130754, -2.8415696645225834, -2.617983741411955, -1.9595097331022389]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3147936744417734, -4.35514819433206, -3.901336509431644, -4.614017940416488, -4.736562024008379, -2.6614686266555623]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5196111523959692, -2.528995792031909, -2.131865480377527, -2.342176492309826, -2.122495367398919, -1.6421252285388797]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6936114638254625, -3.386653236250639, -3.518480749785551, -4.003078442616046, -4.060329672060947, -2.3190110369377623]}}