{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:39.747464", "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-Dec-16_to_2017-Dec-18_309.0_2.5"}, "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": 2017120000570}, "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": "December 16 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 18 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 52451.14225298108}, "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": ["Brazil", "French Guiana"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South America"]}, "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": 2.5}, "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": 309.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "309.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 306.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 309.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.53, 5.03], [-53.18, 5.18], [-53.03, 5.53], [-52.5, 5.75], [-51.97, 5.53], [-51.82, 5.18], [-51.47, 5.03], [-51.32, 4.68], [-50.97, 4.53], [-50.75, 4.0], [-50.85, 3.75], [-50.75, 3.5], [-50.85, 3.25], [-50.82, 3.18], [-50.47, 3.03], [-50.25, 2.5], [-50.47, 1.97], [-51.0, 1.75], [-51.25, 1.85], [-51.32, 1.82], [-51.35, 1.75], [-51.25, 1.5], [-51.47, 0.97], [-52.0, 0.75], [-52.53, 0.97], [-52.75, 1.5], [-52.65, 1.75], [-52.75, 2.0], [-52.65, 2.25], [-52.68, 2.32], [-53.03, 2.47], [-53.18, 2.82], [-53.53, 2.97], [-53.75, 3.5], [-53.54, 4.0], [-53.75, 4.5], [-53.53, 5.03]]]]}, "2017-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.53, 5.03], [-53.18, 5.18], [-53.03, 5.53], [-52.5, 5.75], [-51.97, 5.53], [-51.82, 5.18], [-51.47, 5.03], [-51.32, 4.68], [-50.97, 4.53], [-50.75, 4.0], [-50.85, 3.75], [-50.75, 3.5], [-50.85, 3.25], [-50.82, 3.18], [-50.47, 3.03], [-50.25, 2.5], [-50.47, 1.97], [-51.0, 1.75], [-51.25, 1.85], [-51.32, 1.82], [-51.35, 1.75], [-51.25, 1.5], [-51.47, 0.97], [-52.0, 0.75], [-52.53, 0.97], [-52.75, 1.5], [-52.65, 1.75], [-52.75, 2.0], [-52.65, 2.25], [-52.68, 2.32], [-53.03, 2.47], [-53.18, 2.82], [-53.53, 2.97], [-53.75, 3.5], [-53.54, 4.0], [-53.75, 4.5], [-53.53, 5.03]]]]}, "2017-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.53, 5.03], [-53.18, 5.18], [-53.03, 5.53], [-52.5, 5.75], [-51.97, 5.53], [-51.82, 5.18], [-51.47, 5.03], [-51.32, 4.68], [-50.97, 4.53], [-50.75, 4.0], [-50.85, 3.75], [-50.75, 3.5], [-50.85, 3.25], [-50.82, 3.18], [-50.47, 3.03], [-50.25, 2.5], [-50.47, 1.97], [-51.0, 1.75], [-51.25, 1.85], [-51.32, 1.82], [-51.35, 1.75], [-51.25, 1.5], [-51.47, 0.97], [-52.0, 0.75], [-52.53, 0.97], [-52.75, 1.5], [-52.65, 1.75], [-52.75, 2.0], [-52.65, 2.25], [-52.68, 2.32], [-53.03, 2.47], [-53.18, 2.82], [-53.53, 2.97], [-53.75, 3.5], [-53.54, 4.0], [-53.75, 4.5], [-53.53, 5.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.119644299811398}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.367326959277348}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.23206206991847, 24.38133299409992, 24.35663443174053]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.53769549379024, 23.757071625492983, 23.713353705013105]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.524986211212519, -1.3102757418229203, -1.2667189247966046]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.119644299811398, -1.7881601054723433, -1.9966986588539726]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7429096551233232, -1.497787313571053, -1.47226130314528]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4331169608782224, -1.728957248469822, -1.6742762331949304]}}