{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:25.578533", "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-Mar-31_to_2018-Apr-03_305.5_-18.0"}, "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": 2018030001226}, "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 31 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 03 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": 55628.788176292015}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["South-American-Monsoon"]}, "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": -18.0}, "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": 305.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "305.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 303.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 307.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.18, -19.18], [-55.53, -19.03], [-55.75, -18.5], [-55.53, -17.97], [-55.18, -17.82], [-55.15, -17.75], [-55.25, -17.5], [-55.03, -16.97], [-54.5, -16.75], [-53.97, -16.97], [-53.82, -17.32], [-53.47, -17.47], [-53.25, -18.0], [-53.47, -18.53], [-53.82, -18.68], [-53.85, -18.75], [-53.82, -18.82], [-53.47, -18.97], [-53.25, -19.5], [-53.47, -20.03], [-54.0, -20.25], [-54.25, -20.15], [-54.32, -20.18], [-54.47, -20.53], [-55.0, -20.75], [-55.53, -20.53], [-55.75, -20.0], [-55.53, -19.47], [-55.18, -19.32], [-55.15, -19.25], [-55.18, -19.18]]]]}, "2018-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.62, -18.8], [-55.75, -18.5], [-55.54, -18.0], [-55.75, -17.5], [-55.53, -16.97], [-55.0, -16.75], [-54.75, -16.85], [-54.5, -16.75], [-54.25, -16.85], [-54.0, -16.75], [-53.75, -16.85], [-53.5, -16.75], [-52.97, -16.97], [-52.75, -17.5], [-52.85, -17.75], [-52.82, -17.82], [-52.47, -17.97], [-52.25, -18.5], [-52.47, -19.03], [-52.82, -19.18], [-52.97, -19.53], [-53.32, -19.68], [-53.47, -20.03], [-54.0, -20.25], [-54.25, -20.15], [-54.32, -20.18], [-54.47, -20.53], [-55.0, -20.75], [-55.25, -20.65], [-55.5, -20.75], [-55.75, -20.65], [-56.0, -20.75], [-56.53, -20.53], [-56.75, -20.0], [-56.53, -19.47], [-56.18, -19.32], [-56.03, -18.97], [-55.62, -18.8]]]]}, "2018-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.62, -18.8], [-55.75, -18.5], [-55.54, -18.0], [-55.75, -17.5], [-55.53, -16.97], [-55.0, -16.75], [-54.75, -16.85], [-54.5, -16.75], [-54.25, -16.85], [-54.0, -16.75], [-53.75, -16.85], [-53.5, -16.75], [-52.97, -16.97], [-52.75, -17.5], [-52.85, -17.75], [-52.82, -17.82], [-52.47, -17.97], [-52.25, -18.5], [-52.47, -19.03], [-52.82, -19.18], [-52.97, -19.53], [-53.32, -19.68], [-53.47, -20.03], [-54.0, -20.25], [-54.25, -20.15], [-54.32, -20.18], [-54.47, -20.53], [-55.0, -20.75], [-55.25, -20.65], [-55.5, -20.75], [-55.75, -20.65], [-56.0, -20.75], [-56.53, -20.53], [-56.75, -20.0], [-56.53, -19.47], [-56.18, -19.32], [-56.03, -18.97], [-55.62, -18.8]]]]}, "2018-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.5, -18.75], [-55.2, -18.88], [-55.04, -18.5], [-55.18, -18.18], [-55.53, -18.03], [-55.75, -17.5], [-55.53, -16.97], [-55.0, -16.75], [-54.75, -16.85], [-54.5, -16.75], [-54.25, -16.85], [-54.0, -16.75], [-53.75, -16.85], [-53.5, -16.75], [-52.97, -16.97], [-52.75, -17.5], [-52.85, -17.75], [-52.82, -17.82], [-52.47, -17.97], [-52.25, -18.5], [-52.47, -19.03], [-52.82, -19.18], [-52.97, -19.53], [-53.32, -19.68], [-53.47, -20.03], [-54.0, -20.25], [-54.25, -20.15], [-54.32, -20.18], [-54.47, -20.53], [-55.0, -20.75], [-55.25, -20.65], [-55.5, -20.75], [-55.75, -20.65], [-56.0, -20.75], [-56.53, -20.53], [-56.75, -20.0], [-56.53, -19.47], [-56.18, -19.32], [-56.03, -18.97], [-55.5, -18.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.991086208115746}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2186113023885383}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.886584501031848, 23.702929668949935, 23.381362375079448, 23.462846728023067]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.5097858210259, 22.21263827830245, 21.907176910733824, 21.930486156622067]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.092117652550245, -2.082595292120471, -2.4120250367678655, -2.2214281312374036]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.377940785811745, -2.7112055584138943, -2.991086208115746, -2.595794571728618]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4213989711785875, -1.4329104479867918, -1.6767125038552226, -1.5263035524700792]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5708947943297262, -1.7358879558541618, -2.0609771554693985, -1.7961170889036875]}}