{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:14.919418", "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": "2017-Jun-21_to_2017-Jun-24_15.0_13.0"}, "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": 2017060000648}, "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": "June 21 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 24 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 74968.2230738297}, "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": ["Cameroon", "Chad", "Niger", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "Sahara", "Western-Africa"]}, "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": 13.0}, "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": 15.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "15.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 13.5], [14.47, 14.03], [15.0, 14.25], [15.53, 14.03], [15.75, 13.5], [15.65, 13.25], [15.68, 13.18], [16.03, 13.03], [16.25, 12.5], [16.03, 11.97], [15.5, 11.75], [15.25, 11.85], [15.0, 11.75], [14.75, 11.85], [14.5, 11.75], [13.97, 11.97], [13.75, 12.5], [13.97, 13.03], [14.32, 13.18], [14.35, 13.25], [14.25, 13.5]]]]}, "2017-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, 14.5], [11.47, 15.03], [12.0, 15.25], [12.25, 15.15], [12.32, 15.18], [12.47, 15.53], [13.0, 15.75], [13.25, 15.65], [13.5, 15.75], [13.75, 15.65], [14.0, 15.75], [14.25, 15.65], [14.5, 15.75], [15.03, 15.53], [15.18, 15.18], [15.25, 15.15], [15.5, 15.25], [16.03, 15.03], [16.25, 14.5], [16.04, 14.0], [16.25, 13.5], [16.04, 13.0], [16.25, 12.5], [16.03, 11.97], [15.5, 11.75], [15.25, 11.85], [15.0, 11.75], [14.75, 11.85], [14.5, 11.75], [13.97, 11.97], [13.75, 12.5], [13.93, 12.93], [13.5, 12.75], [13.25, 12.85], [13.0, 12.75], [12.47, 12.97], [12.32, 13.32], [11.97, 13.47], [11.82, 13.82], [11.47, 13.97], [11.25, 14.5]], [[14.32, 13.32], [14.2, 13.38], [14.07, 13.07], [14.32, 13.18], [14.35, 13.25], [14.32, 13.32]]]]}, "2017-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, 14.5], [11.47, 15.03], [12.0, 15.25], [12.25, 15.15], [12.32, 15.18], [12.47, 15.53], [13.0, 15.75], [13.25, 15.65], [13.5, 15.75], [13.75, 15.65], [14.0, 15.75], [14.25, 15.65], [14.5, 15.75], [15.03, 15.53], [15.18, 15.18], [15.25, 15.15], [15.5, 15.25], [16.03, 15.03], [16.25, 14.5], [16.04, 14.0], [16.25, 13.5], [16.04, 13.0], [16.25, 12.5], [16.03, 11.97], [15.5, 11.75], [15.25, 11.85], [15.0, 11.75], [14.75, 11.85], [14.5, 11.75], [13.97, 11.97], [13.75, 12.5], [13.93, 12.93], [13.5, 12.75], [13.25, 12.85], [13.0, 12.75], [12.47, 12.97], [12.32, 13.32], [11.97, 13.47], [11.82, 13.82], [11.47, 13.97], [11.25, 14.5]], [[14.32, 13.32], [14.2, 13.38], [14.07, 13.07], [14.32, 13.18], [14.35, 13.25], [14.32, 13.32]]]]}, "2017-06-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, 14.5], [11.47, 15.03], [12.0, 15.25], [12.25, 15.15], [12.32, 15.18], [12.47, 15.53], [13.0, 15.75], [13.25, 15.65], [13.5, 15.75], [13.75, 15.65], [14.0, 15.75], [14.25, 15.65], [14.5, 15.75], [15.03, 15.53], [15.18, 15.18], [15.25, 15.15], [15.5, 15.25], [16.03, 15.03], [16.25, 14.5], [16.04, 14.0], [16.25, 13.5], [16.04, 13.0], [16.25, 12.5], [16.03, 11.97], [15.5, 11.75], [15.25, 11.85], [15.0, 11.75], [14.47, 11.97], [14.25, 12.5], [14.35, 12.75], [14.25, 13.0], [14.35, 13.25], [14.32, 13.32], [14.2, 13.38], [14.03, 12.97], [13.5, 12.75], [13.25, 12.85], [13.0, 12.75], [12.47, 12.97], [12.32, 13.32], [11.97, 13.47], [11.82, 13.82], [11.47, 13.97], [11.25, 14.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.184265271390132}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.783436766588234}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.03812216301577, 30.143305555789766, 30.116995986715665, 29.336600325451627]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.408766215523485, 28.57740221811588, 27.5449163188361, 28.15845896503896]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.004585090949752, -2.5727762124889932, -2.5173829548859588, -3.2339416633894964]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.597377489834855, -3.657238103878626, -4.024744832755744, -4.184265271390132]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8418033358571193, -1.673657070289766, -1.620703947047411, -2.195119102828339]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.120192417565828, -2.047770287027426, -2.2020689778622664, -3.0525214449844764]}}