{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:31.978474", "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": "2015-Mar-27_to_2015-Mar-31_307.0_4.0"}, "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": 2015030000998}, "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 27 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 31 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 77103.53233810817}, "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", "Suriname"]}, "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": 4.0}, "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": 307.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "307.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 304.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 308.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.25}, "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": {"2015-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.03, 3.97], [-55.25, 4.5], [-55.03, 5.03], [-54.5, 5.25], [-54.25, 5.15], [-54.0, 5.25], [-53.75, 5.15], [-53.5, 5.25], [-53.25, 5.15], [-53.18, 5.18], [-53.03, 5.53], [-52.5, 5.75], [-51.97, 5.53], [-51.82, 5.18], [-51.47, 5.03], [-51.25, 4.5], [-51.35, 4.25], [-51.25, 4.0], [-51.47, 3.47], [-52.0, 3.25], [-52.25, 3.35], [-52.5, 3.25], [-52.75, 3.35], [-53.0, 3.25], [-53.25, 3.35], [-53.5, 3.25], [-54.03, 3.47], [-54.18, 3.82], [-54.25, 3.85], [-54.5, 3.75], [-55.03, 3.97]]]]}, "2015-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.25, 5.0], [-56.03, 5.53], [-55.5, 5.75], [-54.97, 5.53], [-54.82, 5.18], [-54.75, 5.15], [-54.5, 5.25], [-54.25, 5.15], [-54.0, 5.25], [-53.75, 5.15], [-53.5, 5.25], [-53.25, 5.15], [-53.18, 5.18], [-53.03, 5.53], [-52.5, 5.75], [-51.97, 5.53], [-51.82, 5.18], [-51.47, 5.03], [-51.25, 4.5], [-51.35, 4.25], [-51.25, 4.0], [-51.47, 3.47], [-51.82, 3.32], [-51.97, 2.97], [-52.32, 2.82], [-52.47, 2.47], [-53.0, 2.25], [-53.25, 2.35], [-53.32, 2.32], [-53.47, 1.97], [-54.0, 1.75], [-54.25, 1.85], [-54.5, 1.75], [-54.75, 1.85], [-55.0, 1.75], [-55.53, 1.97], [-55.75, 2.5], [-55.65, 2.75], [-55.75, 3.0], [-55.53, 3.53], [-55.0, 3.75], [-55.53, 3.97], [-55.68, 4.32], [-56.03, 4.47], [-56.25, 5.0]], [[-54.75, 3.65], [-54.68, 3.68], [-54.62, 3.8], [-54.75, 3.85], [-55.0, 3.75], [-54.75, 3.65]]]]}, "2015-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.25, 5.0], [-56.03, 5.53], [-55.5, 5.75], [-54.97, 5.53], [-54.82, 5.18], [-54.75, 5.15], [-54.5, 5.25], [-54.25, 5.15], [-54.0, 5.25], [-53.75, 5.15], [-53.5, 5.25], [-53.25, 5.15], [-53.18, 5.18], [-53.03, 5.53], [-52.5, 5.75], [-51.97, 5.53], [-51.82, 5.18], [-51.47, 5.03], [-51.25, 4.5], [-51.35, 4.25], [-51.25, 4.0], [-51.47, 3.47], [-51.82, 3.32], [-51.97, 2.97], [-52.32, 2.82], [-52.47, 2.47], [-53.0, 2.25], [-53.25, 2.35], [-53.32, 2.32], [-53.47, 1.97], [-54.0, 1.75], [-54.25, 1.85], [-54.5, 1.75], [-54.75, 1.85], [-55.0, 1.75], [-55.53, 1.97], [-55.75, 2.5], [-55.65, 2.75], [-55.75, 3.0], [-55.53, 3.53], [-55.0, 3.75], [-55.53, 3.97], [-55.68, 4.32], [-56.03, 4.47], [-56.25, 5.0]], [[-54.75, 3.65], [-54.68, 3.68], [-54.62, 3.8], [-54.75, 3.85], [-55.0, 3.75], [-54.75, 3.65]]]]}, "2015-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.25, 5.0], [-56.03, 5.53], [-55.5, 5.75], [-54.97, 5.53], [-54.82, 5.18], [-54.75, 5.15], [-54.5, 5.25], [-54.25, 5.15], [-54.0, 5.25], [-53.47, 5.03], [-53.32, 4.68], [-53.25, 4.65], [-53.0, 4.75], [-52.75, 4.65], [-52.5, 4.75], [-51.97, 4.53], [-51.75, 4.0], [-51.85, 3.75], [-51.75, 3.5], [-51.97, 2.97], [-52.32, 2.82], [-52.47, 2.47], [-53.0, 2.25], [-53.25, 2.35], [-53.32, 2.32], [-53.47, 1.97], [-54.0, 1.75], [-54.25, 1.85], [-54.5, 1.75], [-54.75, 1.85], [-55.0, 1.75], [-55.53, 1.97], [-55.75, 2.5], [-55.65, 2.75], [-55.75, 3.0], [-55.53, 3.53], [-55.0, 3.75], [-55.53, 3.97], [-55.68, 4.32], [-56.03, 4.47], [-56.25, 5.0]], [[-54.75, 3.65], [-54.68, 3.68], [-54.62, 3.8], [-54.75, 3.85], [-55.0, 3.75], [-54.75, 3.65]]]]}, "2015-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.03, 2.47], [-55.25, 3.0], [-55.03, 3.53], [-54.5, 3.75], [-54.25, 3.65], [-54.0, 3.75], [-53.47, 3.53], [-53.25, 3.0], [-53.47, 2.47], [-54.0, 2.25], [-54.25, 2.35], [-54.5, 2.25], [-55.03, 2.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.9102667731172005}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.330419632968834}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.425024274344025, 23.961361745107013, 24.237877443149557, 24.204545887312747, 24.60390236307842]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.014570543451896, 23.1483426432884, 23.095312848470314, 23.270437965534597, 24.57253945348492]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1407847812643324, -1.5340121825082498, -1.2733535285706625, -1.2711156440271427, -1.1052186480241062]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.380779890420058, -1.9102667731172005, -1.726670227688544, -1.5878812759100924, -1.1371409220585633]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6831673429561766, -2.1525323332627884, -1.7681796166405102, -1.6672995765795775, -1.4304439745058306]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9801487672963913, -2.731708689853642, 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