{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:57.753809", "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-01_to_2018-Sep-05_302.0_7.0"}, "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": 2018090000067}, "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 01 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 05 2018"}, "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": 104315.69660408785}, "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": ["Guyana", "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": ["North Atlantic Ocean"]}, "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": 7.0}, "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": 302.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "302.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 300.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 305.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 4.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.0, 7.75], [-57.47, 7.53], [-57.25, 7.0], [-57.47, 6.47], [-58.0, 6.25], [-58.53, 6.47], [-58.75, 7.0], [-58.53, 7.53], [-58.0, 7.75]]]]}, "2018-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.75, 7.0], [-58.53, 7.53], [-58.18, 7.68], [-58.03, 8.03], [-57.5, 8.25], [-57.25, 8.15], [-57.18, 8.18], [-57.03, 8.53], [-56.5, 8.75], [-56.25, 8.65], [-56.0, 8.75], [-55.75, 8.65], [-55.5, 8.75], [-55.25, 8.65], [-55.0, 8.75], [-54.47, 8.53], [-54.32, 8.18], [-53.97, 8.03], [-53.75, 7.5], [-53.97, 6.97], [-54.5, 6.75], [-55.0, 6.96], [-55.32, 6.82], [-55.46, 6.5], [-55.25, 6.0], [-55.35, 5.75], [-55.25, 5.5], [-55.35, 5.25], [-55.25, 5.0], [-55.35, 4.75], [-55.25, 4.5], [-55.47, 3.97], [-56.0, 3.75], [-56.53, 3.97], [-56.68, 4.32], [-56.75, 4.35], [-57.0, 4.25], [-57.53, 4.47], [-57.75, 5.0], [-57.54, 5.5], [-57.68, 5.82], [-58.03, 5.97], [-58.18, 6.32], [-58.53, 6.47], [-58.75, 7.0]]]]}, "2018-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.0, 8.75], [-58.75, 8.65], [-58.5, 8.75], [-58.0, 8.54], [-57.5, 8.75], [-57.25, 8.65], [-57.0, 8.75], [-56.75, 8.65], [-56.5, 8.75], [-56.25, 8.65], [-56.0, 8.75], [-55.75, 8.65], [-55.5, 8.75], [-55.25, 8.65], [-55.0, 8.75], [-54.47, 8.53], [-54.32, 8.18], [-53.97, 8.03], [-53.75, 7.5], [-53.97, 6.97], [-54.5, 6.75], [-55.0, 6.96], [-55.32, 6.82], [-55.46, 6.5], [-55.25, 6.0], [-55.35, 5.75], [-55.25, 5.5], [-55.35, 5.25], [-55.25, 5.0], [-55.35, 4.75], [-55.25, 4.5], [-55.47, 3.97], [-56.0, 3.75], [-56.53, 3.97], [-56.68, 4.32], [-56.75, 4.35], [-57.0, 4.25], [-57.53, 4.47], [-57.75, 5.0], [-57.54, 5.5], [-57.68, 5.82], [-58.03, 5.97], [-58.18, 6.32], [-58.53, 6.47], [-58.68, 6.82], [-58.75, 6.85], [-59.0, 6.75], [-59.25, 6.85], [-59.5, 6.75], [-60.03, 6.97], [-60.25, 7.5], [-60.03, 8.03], [-59.68, 8.18], [-59.53, 8.53], [-59.0, 8.75]]]]}, "2018-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.0, 8.75], [-58.75, 8.65], [-58.5, 8.75], [-58.0, 8.54], [-57.5, 8.75], [-57.25, 8.65], [-57.0, 8.75], [-56.75, 8.65], [-56.5, 8.75], [-56.25, 8.65], [-56.0, 8.75], [-55.75, 8.65], [-55.5, 8.75], [-55.25, 8.65], [-55.0, 8.75], [-54.47, 8.53], [-54.32, 8.18], [-53.97, 8.03], [-53.75, 7.5], [-53.97, 6.97], [-54.5, 6.75], [-55.0, 6.96], [-55.32, 6.82], [-55.46, 6.5], [-55.25, 6.0], [-55.35, 5.75], [-55.25, 5.5], [-55.35, 5.25], [-55.25, 5.0], [-55.35, 4.75], [-55.25, 4.5], [-55.47, 3.97], [-56.0, 3.75], [-56.53, 3.97], [-56.68, 4.32], [-56.75, 4.35], [-57.0, 4.25], [-57.53, 4.47], [-57.75, 5.0], [-57.54, 5.5], [-57.68, 5.82], [-58.03, 5.97], [-58.18, 6.32], [-58.53, 6.47], [-58.68, 6.82], [-58.75, 6.85], [-59.0, 6.75], [-59.25, 6.85], [-59.5, 6.75], [-60.03, 6.97], [-60.25, 7.5], [-60.03, 8.03], [-59.68, 8.18], [-59.53, 8.53], [-59.0, 8.75]]]]}, "2018-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.0, 8.75], [-58.75, 8.65], [-58.5, 8.75], [-58.0, 8.54], [-57.5, 8.75], [-57.25, 8.65], [-57.0, 8.75], [-56.75, 8.65], [-56.5, 8.75], [-55.97, 8.53], [-55.75, 8.0], [-55.85, 7.75], [-55.75, 7.5], [-55.96, 7.0], [-55.75, 6.5], [-55.85, 6.25], [-55.82, 6.18], [-55.47, 6.03], [-55.25, 5.5], [-55.35, 5.25], [-55.25, 5.0], [-55.35, 4.75], [-55.25, 4.5], [-55.47, 3.97], [-56.0, 3.75], [-56.53, 3.97], [-56.68, 4.32], [-56.75, 4.35], [-57.0, 4.25], [-57.53, 4.47], [-57.75, 5.0], [-57.54, 5.5], [-57.68, 5.82], [-58.03, 5.97], [-58.18, 6.32], [-58.53, 6.47], [-58.68, 6.82], [-58.75, 6.85], [-59.0, 6.75], [-59.25, 6.85], [-59.5, 6.75], [-60.03, 6.97], [-60.25, 7.5], [-60.03, 8.03], [-59.68, 8.18], [-59.53, 8.53], [-59.0, 8.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.7774693380873714}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.003716693930285}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.575580822228858, 26.22764470513289, 26.271419453344265, 26.341883920935402, 26.22438428462766]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.575580822228858, 25.12766735049405, 25.11778010972654, 25.188611654241186, 25.17118741846241]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8068256175753845, -1.0618294593788913, -0.9979008385675155, -0.950614485720768, -1.0302233607052425]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.8068256175753845, -1.7774693380873714, -1.447513620920688, -1.6631489809275308, -1.7060298895456185]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.460203821909149, -1.895399910376959, -1.7661736964238532, -1.6894724887104566, -1.7867226123705522]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.460203821909149, -2.218769718953698, -2.2407301415993564, -1.9992023356200537, -2.3543088937706598]}}