{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:36.487155", "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-Feb-08_to_2013-Feb-14_4.0_27.5"}, "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": 2013020000358}, "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 08 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 14 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 129915.22538158181}, "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": 27.5}, "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": 4.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "4.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -1.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 5.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.97, 26.97], [2.75, 27.5], [2.97, 28.03], [3.5, 28.25], [3.75, 28.15], [3.82, 28.18], [3.97, 28.53], [4.5, 28.75], [5.03, 28.53], [5.25, 28.0], [5.03, 27.47], [4.68, 27.32], [4.53, 26.97], [4.0, 26.75], [3.75, 26.85], [3.5, 26.75], [2.97, 26.97]]]]}, "2013-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.5, 27.75], [1.75, 27.65], [1.82, 27.68], [1.97, 28.03], [2.5, 28.25], [2.75, 28.15], [3.0, 28.25], [3.25, 28.15], [3.5, 28.25], [3.75, 28.15], [3.82, 28.18], [3.97, 28.53], [4.5, 28.75], [5.03, 28.53], [5.25, 28.0], [5.03, 27.47], [4.68, 27.32], [4.53, 26.97], [4.13, 26.8], [4.25, 26.5], [4.03, 25.97], [3.5, 25.75], [3.0, 25.96], [2.5, 25.75], [2.25, 25.85], [2.0, 25.75], [1.75, 25.85], [1.5, 25.75], [1.25, 25.85], [1.0, 25.75], [0.47, 25.97], [0.25, 26.5], [0.47, 27.03], [0.82, 27.18], [0.97, 27.53], [1.5, 27.75]]]]}, "2013-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 28.25], [-0.25, 28.15], [0.0, 28.25], [0.25, 28.15], [0.32, 28.18], [0.47, 28.53], [1.0, 28.75], [1.53, 28.53], [1.68, 28.18], [1.75, 28.15], [2.0, 28.25], [2.25, 28.15], [2.32, 28.18], [2.47, 28.53], [3.0, 28.75], [3.53, 28.53], [3.68, 28.18], [3.75, 28.15], [3.82, 28.18], [3.97, 28.53], [4.5, 28.75], [5.03, 28.53], [5.25, 28.0], [5.03, 27.47], [4.68, 27.32], [4.53, 26.97], [4.13, 26.8], [4.25, 26.5], [4.03, 25.97], [3.5, 25.75], [3.2, 25.88], [3.15, 25.75], [3.25, 25.5], [3.03, 24.97], [2.68, 24.82], [2.53, 24.47], [2.0, 24.25], [1.75, 24.35], [1.5, 24.25], [0.97, 24.47], [0.82, 24.82], [0.75, 24.85], [0.5, 24.75], [-0.03, 24.97], [-0.25, 25.5], [-0.15, 25.75], [-0.25, 26.0], [-0.13, 26.3], [-0.25, 26.35], [-0.5, 26.25], [-0.75, 26.35], [-1.0, 26.25], [-1.53, 26.47], [-1.75, 27.0], [-1.53, 27.53], [-1.18, 27.68], [-1.03, 28.03], [-0.5, 28.25]]]]}, "2013-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 28.25], [-0.25, 28.15], [0.0, 28.25], [0.25, 28.15], [0.32, 28.18], [0.47, 28.53], [1.0, 28.75], [1.53, 28.53], [1.68, 28.18], [1.75, 28.15], [2.0, 28.25], [2.25, 28.15], [2.32, 28.18], [2.47, 28.53], [3.0, 28.75], [3.53, 28.53], [3.68, 28.18], [3.75, 28.15], [3.82, 28.18], [3.97, 28.53], [4.5, 28.75], [5.03, 28.53], [5.25, 28.0], [5.03, 27.47], [4.68, 27.32], [4.53, 26.97], [4.13, 26.8], [4.25, 26.5], [4.03, 25.97], [3.68, 25.82], [3.65, 25.75], [3.68, 25.68], [4.03, 25.53], [4.25, 25.0], [4.03, 24.47], [3.5, 24.25], [3.0, 24.46], [2.5, 24.25], [2.25, 24.35], [2.0, 24.25], [1.75, 24.35], [1.5, 24.25], [0.97, 24.47], [0.82, 24.82], [0.75, 24.85], [0.5, 24.75], [-0.03, 24.97], [-0.25, 25.5], [-0.15, 25.75], [-0.25, 26.0], [-0.13, 26.3], [-0.25, 26.35], [-0.5, 26.25], [-0.75, 26.35], [-1.0, 26.25], [-1.53, 26.47], [-1.75, 27.0], [-1.53, 27.53], [-1.18, 27.68], [-1.03, 28.03], [-0.5, 28.25]]]]}, "2013-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 28.25], [-0.25, 28.15], [0.0, 28.25], [0.25, 28.15], [0.32, 28.18], [0.47, 28.53], [1.0, 28.75], [1.53, 28.53], [1.68, 28.18], [1.75, 28.15], [2.0, 28.25], [2.25, 28.15], [2.32, 28.18], [2.47, 28.53], [3.0, 28.75], [3.53, 28.53], [3.68, 28.18], [3.75, 28.15], [4.0, 28.25], [4.5, 28.04], [5.0, 28.25], [5.53, 28.03], [5.75, 27.5], [5.53, 26.97], [5.18, 26.82], [5.03, 26.47], [4.5, 26.25], [4.0, 26.46], [3.68, 26.32], [3.65, 26.25], [3.75, 26.0], [3.65, 25.75], [3.68, 25.68], [4.03, 25.53], [4.18, 25.18], [4.53, 25.03], [4.75, 24.5], [4.53, 23.97], [4.0, 23.75], [3.47, 23.97], [3.32, 24.32], [3.0, 24.46], [2.5, 24.25], [2.25, 24.35], [2.0, 24.25], [1.75, 24.35], [1.5, 24.25], [0.97, 24.47], [0.82, 24.82], [0.75, 24.85], [0.5, 24.75], [-0.03, 24.97], [-0.25, 25.5], [-0.15, 25.75], [-0.25, 26.0], [-0.13, 26.3], [-0.25, 26.35], [-0.5, 26.25], [-0.75, 26.35], [-1.0, 26.25], [-1.53, 26.47], [-1.75, 27.0], [-1.53, 27.53], [-1.18, 27.68], [-1.03, 28.03], [-0.5, 28.25]]]]}, "2013-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.87, 27.3], [0.47, 27.47], [0.25, 28.0], [0.47, 28.53], [1.0, 28.75], [1.53, 28.53], [1.7, 28.13], [2.0, 28.25], [2.25, 28.15], [2.32, 28.18], [2.47, 28.53], [3.0, 28.75], [3.53, 28.53], [3.68, 28.18], [3.75, 28.15], [4.0, 28.25], [4.5, 28.04], [5.0, 28.25], [5.53, 28.03], [5.75, 27.5], [5.53, 26.97], [5.18, 26.82], [5.03, 26.47], [4.5, 26.25], [4.0, 26.46], [3.68, 26.32], [3.65, 26.25], [3.75, 26.0], [3.65, 25.75], [3.68, 25.68], [4.03, 25.53], [4.18, 25.18], [4.53, 25.03], [4.75, 24.5], [4.53, 23.97], [4.0, 23.75], [3.47, 23.97], [3.32, 24.32], [3.0, 24.46], [2.5, 24.25], [2.25, 24.35], [2.0, 24.25], [1.47, 24.47], [1.32, 24.82], [0.97, 24.97], [0.75, 25.5], [0.96, 26.0], [0.75, 26.5], [0.85, 26.75], [0.75, 27.0], [0.87, 27.3]]]]}, "2013-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.47, 23.97], [3.25, 24.5], [3.47, 25.03], [4.0, 25.25], [4.53, 25.03], [4.75, 24.5], [4.53, 23.97], [4.0, 23.75], [3.47, 23.97]]], [[[1.32, 27.18], [1.47, 27.53], [1.82, 27.68], [1.97, 28.03], [2.32, 28.18], [2.47, 28.53], [3.0, 28.75], [3.53, 28.53], [3.68, 28.18], [3.75, 28.15], [4.0, 28.25], [4.5, 28.04], [5.0, 28.25], [5.53, 28.03], [5.75, 27.5], [5.53, 26.97], [5.18, 26.82], [5.03, 26.47], [4.5, 26.25], [4.0, 26.46], [3.68, 26.32], [3.65, 26.25], [3.75, 26.0], [3.53, 25.47], [3.18, 25.32], [3.15, 25.25], [3.25, 25.0], [3.03, 24.47], [2.5, 24.25], [2.25, 24.35], [2.0, 24.25], [1.47, 24.47], [1.32, 24.82], [0.97, 24.97], [0.75, 25.5], [0.96, 26.0], [0.75, 26.5], [0.97, 27.03], [1.32, 27.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.408405793177053}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.156770378384979}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.078628378206588, 11.957357061067853, 12.588263035286388, 12.687727463067063, 12.824341610145552, 12.878077883213052, 12.81838506162103]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.13314152357367, 10.005609251315889, 9.535317708205127, 10.063245323875435, 10.1164478523919, 9.321432795583348, 9.128036230433224]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.030524548771363, -4.005737383343529, -3.8856836274904443, -4.140093240120619, -4.156411734768748, -4.3256190804516725, -4.504411028902422]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.140622434400711, -4.515777477836025, -4.727855727127519, -4.885777341099015, -4.911242733693655, -5.092744616436278, -5.408405793177053]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4127769654177431, -1.4277123488676702, -1.4102552165880495, -1.4786517981972336, -1.4590982320374526, -1.463824648950161, -1.4749252631485235]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4623578286958128, -1.632387256712543, -1.729948691409856, -1.9180876595297958, -1.7417741482198108, -1.5888420034063375, -1.6491997651446881]}}