{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:40.564604", "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": "2021-Mar-28_to_2021-Apr-02_35.5_-13.0"}, "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": 2021030001114}, "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 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 02 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 135399.20265624614}, "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": ["Malawi", "Mozambique", "Tanzania"]}, "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": []}, "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": -13.0}, "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": 35.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "35.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 34.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 38.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.97, -15.53], [35.75, -15.0], [35.97, -14.47], [36.5, -14.25], [37.03, -14.47], [37.25, -15.0], [37.03, -15.53], [36.5, -15.75], [35.97, -15.53]]], [[[34.97, -13.53], [34.75, -13.0], [34.97, -12.47], [35.5, -12.25], [36.03, -12.47], [36.25, -13.0], [36.03, -13.53], [35.5, -13.75], [34.97, -13.53]]]]}, "2021-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.85, -13.25], [34.75, -13.0], [34.97, -12.47], [35.32, -12.32], [35.47, -11.97], [35.82, -11.82], [35.85, -11.75], [35.8, -11.62], [35.5, -11.75], [35.25, -11.65], [35.0, -11.75], [34.47, -11.53], [34.25, -11.0], [34.47, -10.47], [35.0, -10.25], [35.25, -10.35], [35.5, -10.25], [36.0, -10.46], [36.5, -10.25], [37.03, -10.47], [37.18, -10.82], [37.25, -10.85], [37.5, -10.75], [38.03, -10.97], [38.18, -11.32], [38.53, -11.47], [38.75, -12.0], [38.63, -12.3], [39.03, -12.47], [39.25, -13.0], [39.03, -13.53], [38.68, -13.68], [38.53, -14.03], [38.0, -14.25], [38.53, -14.47], [38.75, -15.0], [38.65, -15.25], [38.75, -15.5], [38.53, -16.03], [38.0, -16.25], [37.47, -16.03], [37.32, -15.68], [37.0, -15.54], [36.5, -15.75], [35.97, -15.53], [35.82, -15.18], [35.47, -15.03], [35.32, -14.68], [34.97, -14.53], [34.75, -14.0], [34.85, -13.75], [34.75, -13.5], [34.85, -13.25]], [[37.7, -14.12], [37.65, -14.25], [37.68, -14.32], [37.75, -14.35], [38.0, -14.25], [37.7, -14.12]], [[37.38, -13.2], [37.25, -13.15], [37.18, -13.18], [37.15, -13.25], [37.18, -13.32], [37.3, -13.37], [37.38, -13.2]]]]}, "2021-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.97, -15.03], [33.75, -14.5], [33.97, -13.97], [34.5, -13.75], [34.75, -13.85], [34.82, -13.82], [34.85, -13.75], [34.75, -13.5], [34.85, -13.25], [34.75, -13.0], [34.85, -12.75], [34.75, -12.5], [34.97, -11.97], [35.38, -11.8], [35.32, -11.68], [35.25, -11.65], [35.0, -11.75], [34.47, -11.53], [34.25, -11.0], [34.47, -10.47], [35.0, -10.25], [35.25, -10.35], [35.5, -10.25], [36.0, -10.46], [36.5, -10.25], [37.03, -10.47], [37.18, -10.82], [37.25, -10.85], [37.5, -10.75], [38.03, -10.97], [38.18, -11.32], [38.53, -11.47], [38.75, -12.0], [38.65, -12.25], [38.68, -12.32], [39.03, -12.47], [39.25, -13.0], [39.03, -13.53], [38.68, -13.68], [38.65, -13.75], [38.75, -14.0], [38.65, -14.25], [38.75, -14.5], [38.65, -14.75], [38.75, -15.0], [38.65, -15.25], [38.75, -15.5], [38.53, -16.03], [38.0, -16.25], [37.47, -16.03], [37.32, -15.68], [37.0, -15.54], [36.5, -15.75], [35.97, -15.53], [35.82, -15.18], [35.5, -15.04], [35.0, -15.25], [34.75, -15.15], [34.5, -15.25], [33.97, -15.03]]]]}, "2021-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.97, -15.03], [33.75, -14.5], [33.97, -13.97], [34.5, -13.75], [34.75, -13.85], [34.82, -13.82], [34.85, -13.75], [34.75, -13.5], [34.85, -13.25], [34.75, -13.0], [34.85, -12.75], [34.75, -12.5], [34.97, -11.97], [35.38, -11.8], [35.32, -11.68], [35.25, -11.65], [35.0, -11.75], [34.47, -11.53], [34.25, -11.0], [34.47, -10.47], [35.0, -10.25], [35.25, -10.35], [35.5, -10.25], [36.0, -10.46], [36.5, -10.25], [37.03, -10.47], [37.18, -10.82], [37.25, -10.85], [37.5, -10.75], [38.03, -10.97], [38.18, -11.32], [38.53, -11.47], [38.75, -12.0], [38.65, -12.25], [38.68, -12.32], [39.03, -12.47], [39.25, -13.0], [39.03, -13.53], [38.68, -13.68], [38.65, -13.75], [38.75, -14.0], [38.65, -14.25], [38.75, -14.5], [38.65, -14.75], [38.75, -15.0], [38.65, -15.25], [38.75, -15.5], [38.53, -16.03], [38.0, -16.25], [37.47, -16.03], [37.32, -15.68], [37.0, -15.54], [36.5, -15.75], [35.97, -15.53], [35.82, -15.18], [35.5, -15.04], [35.0, -15.25], [34.75, -15.15], [34.5, -15.25], [33.97, -15.03]]]]}, "2021-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.97, -15.03], [33.75, -14.5], [33.97, -13.97], [34.5, -13.75], [34.75, -13.85], [35.0, -13.75], [35.3, -13.87], [35.38, -13.7], [34.97, -13.53], [34.75, -13.0], [34.85, -12.75], [34.75, -12.5], [34.97, -11.97], [35.38, -11.8], [35.32, -11.68], [34.97, -11.53], [34.75, -11.0], [34.97, -10.47], [35.5, -10.25], [36.0, -10.46], [36.5, -10.25], [37.03, -10.47], [37.18, -10.82], [37.25, -10.85], [37.5, -10.75], [38.03, -10.97], [38.18, -11.32], [38.53, -11.47], [38.75, -12.0], [38.65, -12.25], [38.68, -12.32], [39.03, -12.47], [39.25, -13.0], [39.03, -13.53], [38.68, -13.68], [38.65, -13.75], [38.75, -14.0], [38.65, -14.25], [38.75, -14.5], [38.65, -14.75], [38.75, -15.0], [38.53, -15.53], [38.0, -15.75], [37.47, -15.53], [37.32, -15.18], [36.97, -15.03], [36.82, -14.68], [36.5, -14.54], [36.0, -14.75], [35.7, -14.62], [35.53, -15.03], [35.0, -15.25], [34.75, -15.15], [34.5, -15.25], [33.97, -15.03]], [[36.13, -13.3], [36.43, -13.43], [36.25, -13.0], [36.13, -13.3]], [[36.35, -12.75], [36.32, -12.68], [36.2, -12.62], [36.15, -12.75], [36.25, -13.0], [36.35, -12.75]]]]}, "2021-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, -14.5], [33.97, -13.97], [34.5, -13.75], [34.75, -13.85], [35.0, -13.75], [35.53, -13.97], [35.75, -14.5], [35.53, -15.03], [35.0, -15.25], [34.75, -15.15], [34.5, -15.25], [33.97, -15.03], [33.75, -14.5]]], [[[35.5, -11.75], [36.03, -11.97], [36.25, -12.5], [36.15, -12.75], [36.25, -13.0], [36.03, -13.53], [35.5, -13.75], [34.97, -13.53], [34.75, -13.0], [34.85, -12.75], [34.75, -12.5], [34.97, -11.97], [35.5, -11.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.292751832553961}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4739929040778765}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.190083443414323, 22.0299302556391, 22.01201485163142, 21.87327836947577, 22.36209846620369, 20.507132923670042]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.709680897860892, 19.145500266571332, 18.593109124157422, 19.015458631699573, 19.379937624702734, 19.2659096723699]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2114969557109418, -1.347001516694897, -1.4854637344199457, -1.593475948837431, -1.4365937741991153, -1.4508324208986778]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.404932685267113, -1.710671012623834, -1.9130648167289337, -2.292751832553961, -1.870174319937405, -1.8205532354579077]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2874824308189876, -1.5366994567891632, -1.6608696546180164, -1.7334967372178922, -1.5666979042263283, -1.484826816408304]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2968164942624298, -2.0328847243984205, -2.2037442742026125, -2.3361558915331035, -1.9809229897232674, -1.8334652361479131]}}