{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:07.761927", "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-Aug-11_to_2013-Aug-16_18.5_17.5"}, "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": 2013080000578}, "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": "August 11 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 16 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": 70868.03447663444}, "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": ["Chad"]}, "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": 17.5}, "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": 18.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "18.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, 17.0], [15.47, 17.53], [16.0, 17.75], [16.25, 17.65], [16.32, 17.68], [16.47, 18.03], [17.0, 18.25], [17.25, 18.15], [17.5, 18.25], [17.75, 18.15], [17.82, 18.18], [17.97, 18.53], [18.5, 18.75], [18.75, 18.65], [19.0, 18.75], [19.25, 18.65], [19.5, 18.75], [20.03, 18.53], [20.25, 18.0], [20.03, 17.47], [19.68, 17.32], [19.53, 16.97], [19.0, 16.75], [18.75, 16.85], [18.68, 16.82], [18.53, 16.47], [18.0, 16.25], [17.75, 16.35], [17.68, 16.32], [17.53, 15.97], [17.18, 15.82], [17.03, 15.47], [16.5, 15.25], [15.97, 15.47], [15.75, 16.0], [15.85, 16.25], [15.82, 16.32], [15.47, 16.47], [15.25, 17.0]]]]}, "2013-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, 17.0], [15.47, 17.53], [16.0, 17.75], [16.25, 17.65], [16.32, 17.68], [16.47, 18.03], [16.82, 18.18], [16.97, 18.53], [17.32, 18.68], [17.47, 19.03], [18.0, 19.25], [18.53, 19.03], [18.68, 18.68], [18.75, 18.65], [19.0, 18.75], [19.25, 18.65], [19.5, 18.75], [20.03, 18.53], [20.25, 18.0], [20.03, 17.47], [19.68, 17.32], [19.53, 16.97], [19.18, 16.82], [19.15, 16.75], [19.25, 16.5], [19.03, 15.97], [18.68, 15.82], [18.53, 15.47], [18.0, 15.25], [17.47, 15.47], [17.32, 15.82], [17.25, 15.85], [17.18, 15.82], [17.03, 15.47], [16.5, 15.25], [15.97, 15.47], [15.75, 16.0], [15.85, 16.25], [15.82, 16.32], [15.47, 16.47], [15.25, 17.0]]]]}, "2013-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, 17.0], [15.47, 17.53], [16.0, 17.75], [16.25, 17.65], [16.32, 17.68], [16.47, 18.03], [16.82, 18.18], [16.97, 18.53], [17.32, 18.68], [17.47, 19.03], [18.0, 19.25], [18.53, 19.03], [18.68, 18.68], [18.75, 18.65], [19.0, 18.75], [19.25, 18.65], [19.5, 18.75], [20.03, 18.53], [20.25, 18.0], [20.03, 17.47], [19.68, 17.32], [19.53, 16.97], [19.18, 16.82], [19.15, 16.75], [19.25, 16.5], [19.03, 15.97], [18.68, 15.82], [18.53, 15.47], [18.0, 15.25], [17.47, 15.47], [17.32, 15.82], [17.25, 15.85], [17.18, 15.82], [17.03, 15.47], [16.5, 15.25], [15.97, 15.47], [15.75, 16.0], [15.85, 16.25], [15.82, 16.32], [15.47, 16.47], [15.25, 17.0]]]]}, "2013-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.47, 17.53], [16.82, 17.68], [16.85, 17.75], [16.75, 18.0], [16.97, 18.53], [17.32, 18.68], [17.47, 19.03], [18.0, 19.25], [18.53, 19.03], [18.75, 18.5], [18.65, 18.25], [18.68, 18.18], [19.03, 18.03], [19.25, 17.5], [19.15, 17.25], [19.25, 17.0], [19.15, 16.75], [19.25, 16.5], [19.03, 15.97], [18.68, 15.82], [18.53, 15.47], [18.0, 15.25], [17.47, 15.47], [17.32, 15.82], [17.25, 15.85], [17.0, 15.75], [16.47, 15.97], [16.25, 16.5], [16.35, 16.75], [16.25, 17.0], [16.47, 17.53]]]]}, "2013-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.32, 17.68], [17.35, 17.75], [17.25, 18.0], [17.47, 18.53], [18.0, 18.75], [18.53, 18.53], [18.68, 18.18], [19.03, 18.03], [19.25, 17.5], [19.15, 17.25], [19.25, 17.0], [19.03, 16.47], [18.5, 16.25], [18.25, 16.35], [18.0, 16.25], [17.75, 16.35], [17.68, 16.32], [17.53, 15.97], [17.0, 15.75], [16.47, 15.97], [16.25, 16.5], [16.47, 17.03], [16.82, 17.18], [16.97, 17.53], [17.32, 17.68]]]]}, "2013-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.5, 18.25], [19.03, 18.03], [19.25, 17.5], [19.03, 16.97], [18.5, 16.75], [17.97, 16.97], [17.75, 17.5], [17.97, 18.03], [18.5, 18.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.8219383366320585}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.547146523959218}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.898637955228025, 28.430862331711978, 30.174917976403606, 30.393354040326358, 31.462150160207614, 32.24916218351075]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.200554526975452, 27.536141954152242, 28.37792272584778, 28.701798206065234, 30.275540846128592, 32.24916218351075]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7444117404393538, -5.062226589937524, -3.308994203508668, -3.052918684611886, -2.2962451173840708, -1.9143646038469342]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.4291879841342734, -5.8219383366320585, -3.942286641604028, -3.9237900976623905, -2.875626356282339, -1.9143646038469342]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5215502155178058, -2.906860412646244, -1.9749789191035694, -1.8612653272860227, -1.42073394487718, -1.3275454256491959]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.683316295211531, -3.4906378568513388, -2.5242329187610846, -2.3042217561349965, -1.6941711293406891, -1.3275454256491959]}}