{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:00.639590", "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": "2013-Apr-10_to_2013-Apr-12_31.5_-29.5"}, "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": 2013040000380}, "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": "April 10 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2013"}, "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": 89331.19112235466}, "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": ["Eswatini", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": ["Indian 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": -29.5}, "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": 31.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 30.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.25, -29.5], [30.46, -29.0], [30.32, -28.68], [29.97, -28.53], [29.75, -28.0], [29.97, -27.47], [30.32, -27.32], [30.35, -27.25], [30.25, -27.0], [30.47, -26.47], [31.0, -26.25], [31.25, -26.35], [31.5, -26.25], [32.03, -26.47], [32.18, -26.82], [32.25, -26.85], [32.5, -26.75], [33.03, -26.97], [33.25, -27.5], [33.15, -27.75], [33.18, -27.82], [33.53, -27.97], [33.75, -28.5], [33.65, -28.75], [33.75, -29.0], [33.65, -29.25], [33.68, -29.32], [34.03, -29.47], [34.25, -30.0], [34.15, -30.25], [34.25, -30.5], [34.03, -31.03], [33.5, -31.25], [32.97, -31.03], [32.82, -30.68], [32.75, -30.65], [32.5, -30.75], [32.25, -30.65], [32.0, -30.75], [31.75, -30.65], [31.68, -30.68], [31.53, -31.03], [31.18, -31.18], [31.03, -31.53], [30.5, -31.75], [29.97, -31.53], [29.75, -31.0], [29.97, -30.47], [30.32, -30.32], [30.46, -30.0], [30.25, -29.5]]]]}, "2013-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.25, -29.5], [30.46, -29.0], [30.32, -28.68], [29.97, -28.53], [29.75, -28.0], [29.97, -27.47], [30.32, -27.32], [30.35, -27.25], [30.25, -27.0], [30.47, -26.47], [31.0, -26.25], [31.25, -26.35], [31.5, -26.25], [32.03, -26.47], [32.18, -26.82], [32.25, -26.85], [32.5, -26.75], [33.03, -26.97], [33.25, -27.5], [33.15, -27.75], [33.18, -27.82], [33.53, -27.97], [33.75, -28.5], [33.65, -28.75], [33.75, -29.0], [33.65, -29.25], [33.68, -29.32], [34.03, -29.47], [34.25, -30.0], [34.15, -30.25], [34.25, -30.5], [34.03, -31.03], [33.5, -31.25], [32.97, -31.03], [32.82, -30.68], [32.75, -30.65], [32.5, -30.75], [32.25, -30.65], [32.0, -30.75], [31.75, -30.65], [31.68, -30.68], [31.53, -31.03], [31.18, -31.18], [31.03, -31.53], [30.5, -31.75], [29.97, -31.53], [29.75, -31.0], [29.97, -30.47], [30.32, -30.32], [30.46, -30.0], [30.25, -29.5]]]]}, "2013-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.25, -29.5], [30.46, -29.0], [30.32, -28.68], [29.97, -28.53], [29.75, -28.0], [29.97, -27.47], [30.32, -27.32], [30.35, -27.25], [30.25, -27.0], [30.47, -26.47], [31.0, -26.25], [31.25, -26.35], [31.5, -26.25], [32.03, -26.47], [32.18, -26.82], [32.25, -26.85], [32.5, -26.75], [33.03, -26.97], [33.25, -27.5], [33.15, -27.75], [33.18, -27.82], [33.53, -27.97], [33.75, -28.5], [33.65, -28.75], [33.75, -29.0], [33.65, -29.25], [33.68, -29.32], [34.03, -29.47], [34.25, -30.0], [34.15, -30.25], [34.25, -30.5], [34.03, -31.03], [33.5, -31.25], [32.97, -31.03], [32.82, -30.68], [32.75, -30.65], [32.5, -30.75], [32.25, -30.65], [32.0, -30.75], [31.75, -30.65], [31.68, -30.68], [31.53, -31.03], [31.18, -31.18], [31.03, -31.53], [30.5, -31.75], [29.97, -31.53], [29.75, -31.0], [29.97, -30.47], [30.32, -30.32], [30.46, -30.0], [30.25, -29.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.565476969039139}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5780985097483198}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.19415576191676, 17.604875169399634, 19.09561046472004]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.28349689616772, 10.839026727985356, 13.720879339134683]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7208016985840464, -4.274782867346887, -2.738710963314027]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.133924720459163, -6.565476969039139, -3.5642271743209903]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.098208819452912, -2.480184187455488, -1.6571248006246724]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.2057732946973116, -3.032825642897895, -2.113104013707297]}}