{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:24.495139", "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": "2012-Jan-28_to_2012-Feb-01_7.0_24.5"}, "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": 2012010001464}, "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": "January 28 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 01 2012"}, "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": 72970.69300448686}, "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": ["Algeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 24.5}, "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": 7.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "7.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 4.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 8.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.0, 24.75], [5.53, 24.53], [5.75, 24.0], [5.53, 23.47], [5.0, 23.25], [4.47, 23.47], [4.25, 24.0], [4.47, 24.53], [5.0, 24.75]]]]}, "2012-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.47, 25.03], [5.0, 25.25], [5.25, 25.15], [5.5, 25.25], [6.0, 25.04], [6.5, 25.25], [6.75, 25.15], [7.0, 25.25], [7.53, 25.03], [7.75, 24.5], [7.65, 24.25], [7.75, 24.0], [7.53, 23.47], [7.0, 23.25], [6.5, 23.46], [6.0, 23.25], [5.75, 23.35], [5.5, 23.25], [5.25, 23.35], [5.0, 23.25], [4.47, 23.47], [4.25, 24.0], [4.35, 24.25], [4.25, 24.5], [4.47, 25.03]]]]}, "2012-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.35, 24.75], [4.25, 25.0], [4.35, 25.25], [4.25, 25.5], [4.47, 26.03], [4.82, 26.18], [4.97, 26.53], [5.5, 26.75], [6.03, 26.53], [6.2, 26.13], [6.5, 26.25], [6.75, 26.15], [7.0, 26.25], [7.25, 26.15], [7.5, 26.25], [8.03, 26.03], [8.18, 25.68], [8.53, 25.53], [8.75, 25.0], [8.65, 24.75], [8.75, 24.5], [8.53, 23.97], [8.18, 23.82], [8.03, 23.47], [7.5, 23.25], [7.25, 23.35], [7.0, 23.25], [6.75, 23.35], [6.5, 23.25], [6.25, 23.35], [6.0, 23.25], [5.75, 23.35], [5.5, 23.25], [5.25, 23.35], [5.0, 23.25], [4.47, 23.47], [4.25, 24.0], [4.35, 24.25], [4.25, 24.5], [4.35, 24.75]]]]}, "2012-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.35, 25.25], [4.25, 25.5], [4.47, 26.03], [4.82, 26.18], [4.97, 26.53], [5.5, 26.75], [6.03, 26.53], [6.2, 26.13], [6.5, 26.25], [6.75, 26.15], [7.0, 26.25], [7.25, 26.15], [7.5, 26.25], [8.03, 26.03], [8.18, 25.68], [8.53, 25.53], [8.75, 25.0], [8.65, 24.75], [8.75, 24.5], [8.53, 23.97], [8.18, 23.82], [8.03, 23.47], [7.5, 23.25], [7.25, 23.35], [7.0, 23.25], [6.75, 23.35], [6.5, 23.25], [6.25, 23.35], [6.0, 23.25], [5.75, 23.35], [5.5, 23.25], [4.97, 23.47], [4.82, 23.82], [4.47, 23.97], [4.25, 24.5], [4.35, 24.75], [4.25, 25.0], [4.35, 25.25]]]]}, "2012-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.35, 25.25], [4.25, 25.5], [4.47, 26.03], [4.82, 26.18], [4.97, 26.53], [5.5, 26.75], [6.03, 26.53], [6.2, 26.13], [6.5, 26.25], [6.75, 26.15], [7.0, 26.25], [7.25, 26.15], [7.5, 26.25], [8.03, 26.03], [8.18, 25.68], [8.53, 25.53], [8.75, 25.0], [8.65, 24.75], [8.75, 24.5], [8.53, 23.97], [8.18, 23.82], [8.03, 23.47], [7.5, 23.25], [7.25, 23.35], [7.0, 23.25], [6.75, 23.35], [6.5, 23.25], [5.97, 23.47], [5.82, 23.82], [5.5, 23.96], [5.0, 23.75], [4.47, 23.97], [4.25, 24.5], [4.35, 24.75], [4.25, 25.0], [4.35, 25.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.181891636015905}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.019444725355579}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.0144612625881, 8.328757181705043, 8.014020403415316, 7.235378661147024, 7.755356484160586]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.0144612625881, 7.779095378165152, 6.451081216562557, 4.923317488726411, 6.06786119998543]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.859662692187385, -4.476937428256413, -4.671322075110816, -5.543234340491113, -5.085639677079988]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.859662692187385, -4.746053155013442, -5.393823688440193, -6.181891636015905, -5.625431487478352]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2193427912428558, -1.3051879497698273, -1.3528144094546568, -1.6037759222809158, -1.4451351228764968]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2193427912428558, -1.458746533399263, -1.5127486647960666, -1.792467240111638, -1.7210682027545412]}}