{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:15.857651", "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": "2017-Feb-28_to_2017-Mar-05_12.5_-16.5"}, "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": 2017020000769}, "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": "February 28 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 05 2017"}, "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": 71013.14468458468}, "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": ["Angola", "Namibia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.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": -16.5}, "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": 12.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "12.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.35, -16.75], [11.25, -16.5], [11.47, -15.97], [11.82, -15.82], [11.85, -15.75], [11.75, -15.5], [11.85, -15.25], [11.75, -15.0], [11.85, -14.75], [11.75, -14.5], [11.97, -13.97], [12.5, -13.75], [13.03, -13.97], [13.18, -14.32], [13.53, -14.47], [13.68, -14.82], [14.03, -14.97], [14.25, -15.5], [14.15, -15.75], [14.25, -16.0], [14.03, -16.53], [13.5, -16.75], [13.25, -16.65], [13.18, -16.68], [13.15, -16.75], [13.25, -17.0], [13.03, -17.53], [12.68, -17.68], [12.53, -18.03], [12.0, -18.25], [11.47, -18.03], [11.25, -17.5], [11.35, -17.25], [11.25, -17.0], [11.35, -16.75]]]]}, "2017-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.35, -16.75], [11.25, -16.5], [11.47, -15.97], [11.82, -15.82], [11.85, -15.75], [11.75, -15.5], [11.85, -15.25], [11.75, -15.0], [11.85, -14.75], [11.75, -14.5], [11.97, -13.97], [12.5, -13.75], [13.03, -13.97], [13.18, -14.32], [13.53, -14.47], [13.68, -14.82], [14.03, -14.97], [14.25, -15.5], [14.15, -15.75], [14.25, -16.0], [14.13, -16.3], [14.53, -16.47], [14.75, -17.0], [14.53, -17.53], [14.18, -17.68], [14.03, -18.03], [13.68, -18.18], [13.65, -18.25], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.03, -19.53], [13.5, -19.75], [12.97, -19.53], [12.82, -19.18], [12.47, -19.03], [12.32, -18.68], [11.97, -18.53], [11.82, -18.18], [11.47, -18.03], [11.25, -17.5], [11.35, -17.25], [11.25, -17.0], [11.35, -16.75]]]]}, "2017-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.35, -16.75], [11.25, -16.5], [11.47, -15.97], [11.82, -15.82], [11.85, -15.75], [11.75, -15.5], [11.85, -15.25], [11.75, -15.0], [11.85, -14.75], [11.75, -14.5], [11.97, -13.97], [12.5, -13.75], [13.03, -13.97], [13.18, -14.32], [13.53, -14.47], [13.68, -14.82], [14.03, -14.97], [14.25, -15.5], [14.15, -15.75], [14.25, -16.0], [14.13, -16.3], [14.53, -16.47], [14.75, -17.0], [14.53, -17.53], [14.18, -17.68], [14.03, -18.03], [13.68, -18.18], [13.65, -18.25], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.03, -20.03], [13.5, -20.25], [12.97, -20.03], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.47, -19.03], [12.32, -18.68], [11.97, -18.53], [11.82, -18.18], [11.47, -18.03], [11.25, -17.5], [11.35, -17.25], [11.25, -17.0], [11.35, -16.75]]]]}, "2017-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, -17.5], [11.47, -16.97], [11.82, -16.82], [11.85, -16.75], [11.75, -16.5], [11.85, -16.25], [11.75, -16.0], [11.85, -15.75], [11.75, -15.5], [11.97, -14.97], [12.5, -14.75], [12.75, -14.85], [13.0, -14.75], [13.53, -14.97], [13.68, -15.32], [14.03, -15.47], [14.25, -16.0], [14.13, -16.3], [14.53, -16.47], [14.75, -17.0], [14.53, -17.53], [14.18, -17.68], [14.03, -18.03], [13.68, -18.18], [13.65, -18.25], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.03, -20.03], [13.5, -20.25], [12.97, -20.03], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.47, -19.03], [12.32, -18.68], [11.97, -18.53], [11.82, -18.18], [11.47, -18.03], [11.25, -17.5]]]]}, "2017-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, -17.5], [11.47, -16.97], [11.82, -16.82], [11.85, -16.75], [11.75, -16.5], [11.85, -16.25], [11.75, -16.0], [11.97, -15.47], [12.5, -15.25], [12.75, -15.35], [13.0, -15.25], [13.53, -15.47], [13.75, -16.0], [13.54, -16.5], [13.68, -16.82], [14.03, -16.97], [14.25, -17.5], [14.03, -18.03], [13.68, -18.18], [13.65, -18.25], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.03, -20.03], [13.5, -20.25], [12.97, -20.03], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.47, -19.03], [12.32, -18.68], [11.97, -18.53], [11.82, -18.18], [11.47, -18.03], [11.25, -17.5]]]]}, "2017-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.85, -16.75], [11.75, -16.5], [11.97, -15.97], [12.5, -15.75], [13.03, -15.97], [13.25, -16.5], [13.15, -16.75], [13.25, -17.0], [13.15, -17.25], [13.18, -17.32], [13.53, -17.47], [13.75, -18.0], [13.53, -18.53], [13.0, -18.75], [12.47, -18.53], [12.32, -18.18], [11.97, -18.03], [11.75, -17.5], [11.85, -17.25], [11.75, -17.0], [11.85, -16.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.691075911174266}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.104800894608696}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.02015461804325, 20.34954822611121, 21.17798086506366, 22.070857671047236, 21.693522189337045, 22.487259635310124]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.031984249477432, 18.39219342245832, 19.45889289515668, 20.551496028773613, 20.09607867399143, 21.121155170171107]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.415697208062162, -4.043171037849751, -3.2694858746505346, -2.5487447173736655, -2.898994489891611, -2.3040492065226346]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.8376346041481497, -5.691075911174266, -4.545352722344717, -3.2444443359411252, -3.686368775726578, -2.4291397779447834]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.628290342347467, -2.397407548454391, -1.9479835310041536, -1.4111761694496177, -1.5950306086174515, -1.317600740500062]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.872758940125666, -3.1244142022599983, -2.6236335946632656, -1.6890178925657058, -1.9498922504800285, -1.3798551552623717]}}