{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:58.300400", "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": "2018-Sep-04_to_2018-Sep-07_288.5_8.0"}, "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": 2018090000238}, "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": "September 04 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 07 2018"}, "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": 58195.20043374435}, "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": ["Colombia", "Venezuela"]}, "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": 8.0}, "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": 288.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "288.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 287.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 291.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.65, 7.25], [-72.75, 7.5], [-72.65, 7.75], [-72.75, 8.0], 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[-71.15, 8.75], [-71.25, 9.0], [-71.03, 9.53], [-70.5, 9.75], [-70.25, 9.65], [-70.0, 9.75], [-69.47, 9.53], [-69.25, 9.0], [-69.35, 8.75], [-69.25, 8.5], [-69.35, 8.25], [-69.32, 8.18], [-69.25, 8.15], [-69.0, 8.25], [-68.47, 8.03], [-68.25, 7.5], [-68.35, 7.25], [-68.25, 7.0], [-68.47, 6.47], [-69.0, 6.25], [-69.25, 6.35], [-69.5, 6.25], [-69.75, 6.35], [-70.0, 6.25], [-70.25, 6.35], [-70.5, 6.25], [-71.03, 6.47], [-71.25, 7.0], [-71.35, 6.75], [-71.25, 6.5], [-71.47, 5.97], [-72.0, 5.75], [-72.53, 5.97], [-72.75, 6.5], [-72.65, 6.75], [-72.75, 7.0], [-72.65, 7.25]], [[-71.12, 7.3], [-71.25, 7.35], [-71.32, 7.32], [-71.35, 7.25], [-71.25, 7.0], [-71.12, 7.3]]]]}, "2018-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.65, 7.25], [-72.75, 7.5], [-72.65, 7.75], [-72.75, 8.0], [-72.53, 8.53], [-72.0, 8.75], [-71.75, 8.65], [-71.5, 8.75], [-71.25, 8.65], [-71.18, 8.68], [-71.15, 8.75], [-71.25, 9.0], [-71.03, 9.53], [-70.5, 9.75], [-70.25, 9.65], [-70.0, 9.75], [-69.47, 9.53], [-69.25, 9.0], [-69.35, 8.75], [-69.25, 8.5], [-69.35, 8.25], [-69.32, 8.18], [-69.25, 8.15], [-69.0, 8.25], [-68.47, 8.03], [-68.25, 7.5], [-68.35, 7.25], [-68.25, 7.0], [-68.47, 6.47], [-69.0, 6.25], [-69.25, 6.35], [-69.5, 6.25], [-69.75, 6.35], [-70.0, 6.25], [-70.25, 6.35], [-70.5, 6.25], [-71.03, 6.47], [-71.25, 7.0], [-71.35, 6.75], [-71.25, 6.5], [-71.47, 5.97], [-72.0, 5.75], [-72.53, 5.97], [-72.75, 6.5], [-72.65, 6.75], [-72.75, 7.0], [-72.65, 7.25]], [[-71.12, 7.3], [-71.25, 7.35], [-71.32, 7.32], [-71.35, 7.25], [-71.25, 7.0], [-71.12, 7.3]]]]}, "2018-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.53, 8.03], [-72.18, 8.18], [-72.03, 8.53], [-71.5, 8.75], [-71.25, 8.65], [-71.18, 8.68], [-71.03, 9.03], [-70.5, 9.25], [-69.97, 9.03], [-69.75, 8.5], [-69.85, 8.25], [-69.75, 8.0], [-69.96, 7.5], [-69.75, 7.0], [-69.97, 6.47], [-70.5, 6.25], [-71.03, 6.47], [-71.25, 7.0], [-71.47, 6.47], [-72.0, 6.25], [-72.53, 6.47], [-72.75, 7.0], [-72.65, 7.25], [-72.75, 7.5], [-72.53, 8.03]], [[-71.12, 7.3], [-71.25, 7.35], [-71.32, 7.32], [-71.35, 7.25], [-71.25, 7.0], [-71.12, 7.3]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1855856809920624}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6360277558209697}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.467643710242555, 22.430732620030028, 22.424419800212945, 22.441510114634582]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.832872503929252, 14.514848988013455, 14.545159053972725, 17.39495359780358]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.3084388062454493, -1.3552097508069239, -1.3967573870969574, -1.2225804905292534]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1855856809920624, -1.8150567680654603, -2.1518269216421686, -1.402209516044195]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.68826942037203, -1.5983852700601044, -1.6756040956553442, -1.4460769004220688]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-4.03245282529229, -2.097553010586235, -2.5046436584040315, -1.6863496908108584]}}