{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:53.358720", "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": "2016-Mar-13_to_2016-Mar-16_3.0_22.0"}, "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": 2016030000340}, "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": "March 13 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 16 2016"}, "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": 72084.81552901844}, "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"]}, "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": 22.0}, "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": 3.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "3.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -1.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.5, 22.75], [1.75, 22.65], [1.82, 22.68], [1.97, 23.03], [2.5, 23.25], [3.0, 23.04], [3.5, 23.25], [3.75, 23.15], [4.0, 23.25], [4.53, 23.03], [4.75, 22.5], [4.65, 22.25], [4.75, 22.0], [4.53, 21.47], [4.0, 21.25], [3.75, 21.35], [3.5, 21.25], [3.25, 21.35], [3.18, 21.32], [3.03, 20.97], [2.5, 20.75], [2.25, 20.85], [2.0, 20.75], [1.75, 20.85], [1.5, 20.75], [1.25, 20.85], [1.0, 20.75], [0.47, 20.97], [0.25, 21.5], [0.47, 22.03], [0.82, 22.18], [0.97, 22.53], [1.5, 22.75]]]]}, "2016-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 20.75], [-0.0, 20.54], [0.32, 20.68], [0.46, 21.0], [0.25, 21.5], [0.47, 22.03], [0.82, 22.18], [0.97, 22.53], [1.5, 22.75], [1.75, 22.65], [1.82, 22.68], [1.97, 23.03], [2.5, 23.25], [3.0, 23.04], [3.5, 23.25], [3.75, 23.15], [4.0, 23.25], [4.53, 23.03], [4.75, 22.5], [4.65, 22.25], [4.75, 22.0], [4.53, 21.47], [4.0, 21.25], [3.75, 21.35], [3.5, 21.25], [3.25, 21.35], [3.18, 21.32], [3.03, 20.97], [2.68, 20.82], [2.65, 20.75], [2.75, 20.5], [2.53, 19.97], [2.18, 19.82], [2.03, 19.47], [1.5, 19.25], [1.25, 19.35], [1.18, 19.32], [1.03, 18.97], [0.5, 18.75], [0.25, 18.85], [0.0, 18.75], [-0.5, 18.96], [-1.0, 18.75], [-1.53, 18.97], [-1.75, 19.5], [-1.53, 20.03], [-1.18, 20.18], [-1.03, 20.53], [-0.5, 20.75]]]]}, "2016-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 20.75], [-0.0, 20.54], [0.32, 20.68], [0.46, 21.0], [0.25, 21.5], [0.47, 22.03], [0.82, 22.18], [0.97, 22.53], [1.5, 22.75], [1.75, 22.65], [1.82, 22.68], [1.97, 23.03], [2.5, 23.25], [3.0, 23.04], [3.5, 23.25], [3.75, 23.15], [4.0, 23.25], [4.53, 23.03], [4.75, 22.5], [4.65, 22.25], [4.75, 22.0], [4.53, 21.47], [4.0, 21.25], [3.75, 21.35], [3.5, 21.25], [3.25, 21.35], [3.18, 21.32], [3.03, 20.97], [2.68, 20.82], [2.65, 20.75], [2.75, 20.5], [2.53, 19.97], [2.18, 19.82], [2.03, 19.47], [1.5, 19.25], [1.25, 19.35], [1.18, 19.32], [1.03, 18.97], [0.5, 18.75], [0.25, 18.85], [0.0, 18.75], [-0.5, 18.96], [-1.0, 18.75], [-1.53, 18.97], [-1.75, 19.5], [-1.53, 20.03], [-1.18, 20.18], [-1.03, 20.53], [-0.5, 20.75]]]]}, "2016-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 20.75], [-0.0, 20.54], [0.32, 20.68], [0.47, 21.03], [0.82, 21.18], [0.97, 21.53], [1.5, 21.75], [1.75, 21.65], [2.0, 21.75], [2.53, 21.53], [2.75, 21.0], [2.65, 20.75], [2.75, 20.5], [2.53, 19.97], [2.18, 19.82], [2.03, 19.47], [1.5, 19.25], [1.25, 19.35], [1.18, 19.32], [1.03, 18.97], [0.5, 18.75], [0.25, 18.85], [0.0, 18.75], [-0.5, 18.96], [-1.0, 18.75], [-1.53, 18.97], [-1.75, 19.5], [-1.53, 20.03], [-1.18, 20.18], [-1.03, 20.53], [-0.5, 20.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.706453848285435}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.838406357401782}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.679479025471835, 19.272072938001884, 19.492269000627687, 21.046730809946837]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.211608868413634, 17.64102410720494, 17.862372290500105, 19.998296000264475]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.6005458346660975, -5.025244722997916, -4.956609375337348, -4.460585708007732]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.867225639807543, -5.517889140774685, -5.706453848285435, -4.7408416274611795]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3918366702235025, -1.5393749629593056, -1.5871464531749981, -1.4402600571869517]}, "anom_scaled_evo_maxamp": {"name": "Evolution 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