{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:11.672059", "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": "2015-Nov-25_to_2015-Nov-28_9.0_28.5"}, "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": 2015110000730}, "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": "November 25 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 28 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 65908.7618839317}, "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", "Libya"]}, "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": 28.5}, "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": 9.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "9.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 6.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 11.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.32, 27.18], [7.35, 27.25], [7.25, 27.5], [7.47, 28.03], [7.82, 28.18], [7.97, 28.53], [8.32, 28.68], [8.47, 29.03], [9.0, 29.25], [9.25, 29.15], [9.5, 29.25], [9.75, 29.15], [10.0, 29.25], [10.25, 29.15], [10.5, 29.25], [11.03, 29.03], [11.25, 28.5], [11.03, 27.97], [10.5, 27.75], [10.25, 27.85], [10.18, 27.82], [10.04, 27.5], [10.25, 27.0], [10.03, 26.47], [9.68, 26.32], [9.53, 25.97], [9.18, 25.82], [9.03, 25.47], [8.5, 25.25], [8.25, 25.35], [8.0, 25.25], [7.5, 25.46], [7.0, 25.25], [6.47, 25.47], [6.25, 26.0], [6.47, 26.53], [6.82, 26.68], [6.97, 27.03], [7.32, 27.18]]]]}, "2015-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.32, 27.18], [7.35, 27.25], [7.25, 27.5], [7.47, 28.03], [7.82, 28.18], [7.97, 28.53], [8.32, 28.68], [8.47, 29.03], [9.0, 29.25], [9.25, 29.15], [9.5, 29.25], [9.75, 29.15], [10.0, 29.25], [10.25, 29.15], [10.5, 29.25], [11.03, 29.03], [11.25, 28.5], [11.15, 28.25], [11.18, 28.18], [11.53, 28.03], [11.75, 27.5], [11.53, 26.97], [11.0, 26.75], [10.75, 26.85], [10.5, 26.75], [10.2, 26.88], [10.03, 26.47], [9.68, 26.32], [9.53, 25.97], [9.18, 25.82], [9.03, 25.47], [8.5, 25.25], [8.25, 25.35], [8.0, 25.25], [7.5, 25.46], [7.0, 25.25], [6.47, 25.47], [6.25, 26.0], [6.47, 26.53], [6.82, 26.68], [6.97, 27.03], [7.32, 27.18]]]]}, "2015-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.32, 27.18], [7.35, 27.25], [7.25, 27.5], [7.47, 28.03], [7.82, 28.18], [7.97, 28.53], [8.32, 28.68], [8.47, 29.03], [9.0, 29.25], [9.25, 29.15], [9.5, 29.25], [9.75, 29.15], [10.0, 29.25], [10.25, 29.15], [10.5, 29.25], [11.03, 29.03], [11.25, 28.5], [11.15, 28.25], [11.18, 28.18], [11.53, 28.03], [11.75, 27.5], [11.53, 26.97], [11.0, 26.75], [10.75, 26.85], [10.5, 26.75], [10.2, 26.88], [10.03, 26.47], [9.68, 26.32], [9.53, 25.97], [9.18, 25.82], [9.03, 25.47], [8.5, 25.25], [8.25, 25.35], [8.0, 25.25], [7.5, 25.46], [7.0, 25.25], [6.47, 25.47], [6.25, 26.0], [6.47, 26.53], [6.82, 26.68], [6.97, 27.03], [7.32, 27.18]]]]}, "2015-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.97, 28.53], [10.5, 28.75], [11.03, 28.53], [11.18, 28.18], [11.53, 28.03], [11.75, 27.5], [11.53, 26.97], [11.0, 26.75], [10.75, 26.85], [10.5, 26.75], [9.97, 26.97], [9.75, 27.5], [9.85, 27.75], [9.75, 28.0], [9.97, 28.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.684570724641901}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.693652150134199}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.556394998235476, 10.448339302533725, 11.979493018318578, 12.104949035826223]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.757895116005784, 9.183367630546797, 10.602445138463338, 11.9451081956812]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.050174439263693, -5.919240413464078, -4.2157617042436, -3.216413586713486]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.740590670874269, -6.684570724641901, -5.142249928570948, -3.3429575236715436]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.334324671493719, -1.939104529512888, -1.3786777736775744, -1.1189095161842355]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6133750305502566, -2.083500008923841, -1.7443171650862486, -1.1332388544585583]}}