{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:54.028286", "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": "2011-Jul-08_to_2011-Jul-14_11.0_27.5"}, "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": 2011070000602}, "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 08 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 14 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 470375.53168236394}, "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", "Libya"]}, "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": 27.5}, "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": 11.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "11.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 2.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.0, 30.75], [15.53, 30.53], [15.75, 30.0], [15.53, 29.47], [15.0, 29.25], [14.47, 29.47], [14.25, 30.0], [14.47, 30.53], [15.0, 30.75]]]]}, "2011-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, 29.5], [12.97, 30.03], [13.5, 30.25], [14.0, 30.04], [14.32, 30.18], [14.47, 30.53], [15.0, 30.75], [15.53, 30.53], [15.68, 30.18], [16.03, 30.03], [16.25, 29.5], [16.03, 28.97], [15.5, 28.75], [15.2, 28.88], [15.03, 28.47], [14.5, 28.25], [14.25, 28.35], [14.0, 28.25], [13.47, 28.47], [13.32, 28.82], [12.97, 28.97], [12.75, 29.5]]]]}, "2011-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.35, 28.25], [8.25, 28.5], [8.35, 28.75], [8.25, 29.0], [8.47, 29.53], [9.0, 29.75], [9.25, 29.65], [9.5, 29.75], [9.75, 29.65], [10.0, 29.75], [10.25, 29.65], [10.32, 29.68], [10.47, 30.03], [11.0, 30.25], [11.5, 30.04], [12.0, 30.25], [12.53, 30.03], [12.68, 29.68], [12.75, 29.65], [12.82, 29.68], [12.97, 30.03], [13.5, 30.25], [14.0, 30.04], [14.32, 30.18], [14.47, 30.53], [15.0, 30.75], [15.53, 30.53], [15.68, 30.18], [16.03, 30.03], [16.25, 29.5], [16.03, 28.97], [15.5, 28.75], [15.75, 28.65], [16.0, 28.75], [16.53, 28.53], [16.75, 28.0], [16.53, 27.47], [16.18, 27.32], [16.15, 27.25], [16.25, 27.0], [16.15, 26.75], [16.25, 26.5], [16.03, 25.97], [15.5, 25.75], [15.25, 25.85], [15.0, 25.75], [14.75, 25.85], [14.5, 25.75], [14.25, 25.85], [14.0, 25.75], [13.75, 25.85], [13.5, 25.75], [13.25, 25.85], [13.0, 25.75], [12.75, 25.85], [12.5, 25.75], [12.25, 25.85], [12.0, 25.75], [11.75, 25.85], [11.5, 25.75], [10.97, 25.97], [10.82, 26.32], [10.75, 26.35], [10.5, 26.25], [10.25, 26.35], [10.0, 26.25], [9.75, 26.35], [9.5, 26.25], [8.97, 26.47], [8.82, 26.82], [8.47, 26.97], [8.25, 27.5], [8.35, 27.75], [8.25, 28.0], [8.35, 28.25]], [[15.2, 28.88], [15.15, 28.75], [15.18, 28.68], [15.25, 28.65], [15.5, 28.75], [15.2, 28.88]]]]}, "2011-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.47, 27.53], [2.82, 27.68], [2.97, 28.03], [3.5, 28.25], [3.75, 28.15], [4.0, 28.25], [4.25, 28.15], [4.5, 28.25], [4.75, 28.15], [5.0, 28.25], [5.25, 28.15], [5.32, 28.18], [5.47, 28.53], [6.0, 28.75], [6.25, 28.65], [6.5, 28.75], [6.75, 28.65], [7.0, 28.75], [7.25, 28.65], [7.5, 28.75], [7.75, 28.65], [8.0, 28.75], [8.25, 28.65], [8.32, 28.68], [8.35, 28.75], [8.25, 29.0], [8.47, 29.53], [9.0, 29.75], [9.25, 29.65], [9.5, 29.75], [9.75, 29.65], [10.0, 29.75], [10.25, 29.65], [10.32, 29.68], [10.47, 30.03], [11.0, 30.25], [11.5, 30.04], [12.0, 30.25], [12.53, 30.03], [12.68, 29.68], [12.75, 29.65], [12.82, 29.68], [12.97, 30.03], [13.5, 30.25], [14.0, 30.04], [14.5, 30.25], [15.0, 30.04], [15.5, 30.25], [16.03, 30.03], [16.25, 29.5], [16.03, 28.97], [15.5, 28.75], [15.75, 28.65], [16.0, 28.75], [16.53, 28.53], [16.75, 28.0], [16.53, 27.47], [16.18, 27.32], [16.15, 27.25], [16.25, 27.0], [16.15, 26.75], [16.25, 26.5], [16.03, 25.97], [15.5, 25.75], [15.25, 25.85], [15.18, 25.82], [15.15, 25.75], [15.25, 25.5], [15.15, 25.25], [15.25, 25.0], [15.03, 24.47], [14.5, 24.25], [14.25, 24.35], [14.0, 24.25], [13.75, 24.35], [13.5, 24.25], [13.25, 24.35], [13.0, 24.25], [12.75, 24.35], [12.5, 24.25], [12.25, 24.35], [12.0, 24.25], [11.47, 24.47], [11.3, 24.88], [11.0, 24.75], [10.75, 24.85], [10.68, 24.82], [10.53, 24.47], [10.0, 24.25], [9.75, 24.35], [9.5, 24.25], [8.97, 24.47], [8.82, 24.82], [8.75, 24.85], [8.5, 24.75], [8.25, 24.85], [8.0, 24.75], [7.75, 24.85], [7.5, 24.75], [6.97, 24.97], [6.82, 25.32], [6.75, 25.35], [6.5, 25.25], [6.0, 25.46], [5.5, 25.25], [5.25, 25.35], [5.0, 25.25], [4.5, 25.46], [4.0, 25.25], [3.75, 25.35], [3.5, 25.25], [2.97, 25.47], [2.82, 25.82], [2.47, 25.97], [2.25, 26.5], [2.35, 26.75], [2.25, 27.0], [2.47, 27.53]], [[15.2, 28.88], [15.15, 28.75], [15.18, 28.68], [15.25, 28.65], [15.5, 28.75], [15.2, 28.88]]]]}, "2011-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.47, 27.53], [2.82, 27.68], [2.97, 28.03], [3.5, 28.25], [3.75, 28.15], [4.0, 28.25], [4.25, 28.15], [4.5, 28.25], [4.75, 28.15], [5.0, 28.25], [5.25, 28.15], [5.32, 28.18], [5.47, 28.53], [6.0, 28.75], [6.25, 28.65], [6.5, 28.75], [6.75, 28.65], [7.0, 28.75], [7.25, 28.65], [7.5, 28.75], [7.75, 28.65], [8.0, 28.75], [8.25, 28.65], [8.32, 28.68], [8.35, 28.75], [8.25, 29.0], [8.47, 29.53], [9.0, 29.75], [9.25, 29.65], [9.5, 29.75], [9.75, 29.65], [10.0, 29.75], [10.25, 29.65], [10.32, 29.68], [10.47, 30.03], [11.0, 30.25], [11.5, 30.04], [12.0, 30.25], [12.53, 30.03], [12.68, 29.68], [12.75, 29.65], [13.0, 29.75], [13.25, 29.65], [13.5, 29.75], [13.75, 29.65], [14.0, 29.75], [14.25, 29.65], [14.5, 29.75], [15.03, 29.53], [15.25, 29.0], [15.15, 28.75], [15.18, 28.68], [15.25, 28.65], [15.5, 28.75], [15.75, 28.65], [16.0, 28.75], [16.53, 28.53], [16.75, 28.0], [16.53, 27.47], [16.18, 27.32], [16.15, 27.25], [16.25, 27.0], [16.15, 26.75], [16.25, 26.5], [16.03, 25.97], [15.5, 25.75], [15.25, 25.85], [15.18, 25.82], [15.15, 25.75], [15.25, 25.5], [15.15, 25.25], [15.25, 25.0], [15.03, 24.47], [14.5, 24.25], [14.25, 24.35], [14.0, 24.25], [13.75, 24.35], [13.5, 24.25], [13.25, 24.35], [13.0, 24.25], [12.75, 24.35], [12.5, 24.25], [12.25, 24.35], [12.0, 24.25], [11.47, 24.47], [11.3, 24.88], [11.0, 24.75], [10.75, 24.85], [10.68, 24.82], [10.53, 24.47], [10.0, 24.25], [9.75, 24.35], [9.5, 24.25], [8.97, 24.47], [8.82, 24.82], [8.75, 24.85], [8.5, 24.75], [8.25, 24.85], [8.0, 24.75], [7.75, 24.85], [7.5, 24.75], [6.97, 24.97], [6.82, 25.32], [6.75, 25.35], [6.5, 25.25], [6.0, 25.46], [5.5, 25.25], [5.25, 25.35], [5.0, 25.25], [4.5, 25.46], [4.0, 25.25], [3.75, 25.35], [3.5, 25.25], [2.97, 25.47], [2.82, 25.82], [2.47, 25.97], [2.25, 26.5], [2.35, 26.75], [2.25, 27.0], [2.47, 27.53]]]]}, "2011-07-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.47, 27.53], [2.82, 27.68], [2.97, 28.03], [3.5, 28.25], [3.75, 28.15], [4.0, 28.25], [4.25, 28.15], [4.5, 28.25], [4.75, 28.15], [5.0, 28.25], [5.25, 28.15], [5.32, 28.18], [5.47, 28.53], [6.0, 28.75], [6.25, 28.65], [6.5, 28.75], [6.75, 28.65], [7.0, 28.75], [7.25, 28.65], [7.5, 28.75], [7.75, 28.65], [8.0, 28.75], [8.25, 28.65], [8.5, 28.75], [8.75, 28.65], [9.0, 28.75], [9.25, 28.65], [9.5, 28.75], [9.75, 28.65], [10.0, 28.75], [10.25, 28.65], [10.32, 28.68], [10.47, 29.03], [11.0, 29.25], [11.25, 29.15], [11.5, 29.25], [12.03, 29.03], [12.18, 28.68], [12.25, 28.65], [12.5, 28.75], [13.03, 28.53], [13.18, 28.18], [13.25, 28.15], [13.5, 28.25], [13.75, 28.15], [14.0, 28.25], [14.25, 28.15], [14.5, 28.25], [14.75, 28.15], [15.0, 28.25], [15.25, 28.15], [15.5, 28.25], [16.03, 28.03], [16.25, 27.5], [16.15, 27.25], [16.25, 27.0], [16.15, 26.75], [16.25, 26.5], [16.03, 25.97], [15.5, 25.75], [15.25, 25.85], [15.18, 25.82], [15.15, 25.75], [15.25, 25.5], [15.15, 25.25], [15.25, 25.0], [15.03, 24.47], [14.5, 24.25], [14.25, 24.35], [14.0, 24.25], [13.75, 24.35], [13.5, 24.25], [13.25, 24.35], [13.0, 24.25], [12.75, 24.35], [12.5, 24.25], [12.25, 24.35], [12.0, 24.25], [11.47, 24.47], [11.3, 24.88], [11.0, 24.75], [10.75, 24.85], [10.68, 24.82], [10.53, 24.47], [10.0, 24.25], [9.75, 24.35], [9.5, 24.25], [8.97, 24.47], [8.82, 24.82], [8.75, 24.85], [8.5, 24.75], [8.25, 24.85], [8.0, 24.75], [7.75, 24.85], [7.5, 24.75], [6.97, 24.97], [6.82, 25.32], [6.75, 25.35], [6.5, 25.25], [6.0, 25.46], [5.5, 25.25], [5.25, 25.35], [5.0, 25.25], [4.5, 25.46], [4.0, 25.25], [3.75, 25.35], [3.5, 25.25], [2.97, 25.47], [2.82, 25.82], [2.47, 25.97], [2.25, 26.5], [2.35, 26.75], [2.25, 27.0], [2.47, 27.53]]]]}, "2011-07-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 26.97], [10.25, 27.5], [10.47, 28.03], [11.0, 28.25], [11.25, 28.15], [11.5, 28.25], [11.75, 28.15], [12.0, 28.25], [12.25, 28.15], [12.5, 28.25], [12.75, 28.15], [13.0, 28.25], [13.25, 28.15], [13.5, 28.25], [13.75, 28.15], [14.0, 28.25], [14.53, 28.03], [14.75, 27.5], [14.65, 27.25], [14.75, 27.0], [14.63, 26.7], [14.8, 26.63], [14.97, 27.03], [15.5, 27.25], [16.03, 27.03], [16.25, 26.5], [16.03, 25.97], [15.5, 25.75], [15.2, 25.88], [15.03, 25.47], [14.68, 25.32], [14.65, 25.25], [14.75, 25.0], [14.53, 24.47], [14.0, 24.25], [13.75, 24.35], [13.5, 24.25], [13.25, 24.35], [13.0, 24.25], [12.47, 24.47], [12.25, 25.0], [12.47, 25.53], [12.82, 25.68], [12.85, 25.75], [12.75, 26.0], [12.85, 26.25], [12.82, 26.32], [12.75, 26.35], [12.5, 26.25], [11.97, 26.47], [11.82, 26.82], [11.75, 26.85], [11.5, 26.75], [11.25, 26.85], [11.0, 26.75], [10.47, 26.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.276110881087789}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.456173990432767}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.850818661015694, 26.277616218917956, 28.906415405783207, 29.906985958379664, 29.86325098424777, 30.67976353587892, 28.91758430096519]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.850818661015694, 25.658143166959803, 25.737554061574713, 25.73998901482213, 26.319664981447318, 26.707058188411395, 27.744112631142173]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.680325256408139, -3.871985700025931, -3.441902235610626, -3.584227038238123, -3.672535862563123, -3.1298733750009395, -2.7377179686758786]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.680325256408139, -4.0000464828653435, -4.414954899476527, -4.839818634704272, -5.276110881087789, -4.159910649110145, -3.0619031646032226]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2644504525425402, -1.3608189368923, -1.5579166645761333, -1.8418507972085105, -1.9184362881631556, -1.6805008110029627, -1.3826881253153107]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2644504525425402, -1.411113943876206, -1.8082415950476578, -2.274678800949316, -2.7667452442504255, -2.066376801587907, -1.5329504995684196]}}