{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:13.980080", "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-Oct-13_to_2021-Oct-16_10.0_36.5"}, "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": 2021100000476}, "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": "October 13 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 16 2021"}, "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": 50045.2594665901}, "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", "Tunisia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 36.5}, "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": 10.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "10.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 6.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 11.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[7.5, 37.25], [8.0, 37.04], [8.5, 37.25], [8.75, 37.15], [9.0, 37.25], [9.5, 37.04], [10.0, 37.25], [10.53, 37.03], [10.75, 36.5], [10.65, 36.25], [10.68, 36.18], [10.75, 36.15], [11.0, 36.25], [11.53, 36.03], [11.75, 35.5], [11.53, 34.97], [11.0, 34.75], [10.75, 34.85], [10.5, 34.75], [10.25, 34.85], [10.0, 34.75], [9.75, 34.85], [9.5, 34.75], [9.25, 34.85], [9.0, 34.75], [8.75, 34.85], [8.5, 34.75], [8.0, 34.96], [7.5, 34.75], [6.97, 34.97], [6.82, 35.32], [6.75, 35.35], [6.5, 35.25], [5.97, 35.47], [5.75, 36.0], [5.97, 36.53], [6.32, 36.68], [6.47, 37.03], [7.0, 37.25], [7.25, 37.15], [7.5, 37.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.47, 37.03], [7.0, 37.25], [7.25, 37.15], [7.5, 37.25], [8.03, 37.03], [8.18, 36.68], [8.25, 36.65], [8.5, 36.75], [8.75, 36.65], [9.0, 36.75], [9.53, 36.53], [9.75, 36.0], [9.53, 35.47], [9.18, 35.32], [9.03, 34.97], [8.5, 34.75], [8.0, 34.96], [7.5, 34.75], [6.97, 34.97], [6.82, 35.32], [6.75, 35.35], [6.5, 35.25], [5.97, 35.47], [5.75, 36.0], [5.97, 36.53], [6.32, 36.68], [6.47, 37.03]]]]}, "2021-10-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.47, 37.03], [7.0, 37.25], [7.25, 37.15], [7.5, 37.25], [8.0, 37.04], [8.5, 37.25], [8.75, 37.15], [9.0, 37.25], [9.5, 37.04], [10.0, 37.25], [10.53, 37.03], [10.75, 36.5], [10.65, 36.25], [10.68, 36.18], [10.75, 36.15], [11.0, 36.25], [11.53, 36.03], [11.75, 35.5], [11.53, 34.97], [11.0, 34.75], [10.75, 34.85], [10.5, 34.75], [10.25, 34.85], [10.0, 34.75], [9.75, 34.85], [9.5, 34.75], [9.25, 34.85], [9.0, 34.75], [8.75, 34.85], [8.5, 34.75], [8.0, 34.96], [7.5, 34.75], [6.97, 34.97], [6.82, 35.32], [6.75, 35.35], [6.5, 35.25], [5.97, 35.47], [5.75, 36.0], [5.97, 36.53], [6.32, 36.68], [6.47, 37.03]]]]}, "2021-10-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.47, 37.03], [7.0, 37.25], [7.25, 37.15], [7.5, 37.25], [8.0, 37.04], [8.5, 37.25], [8.75, 37.15], [9.0, 37.25], [9.5, 37.04], [10.0, 37.25], [10.53, 37.03], [10.75, 36.5], [10.65, 36.25], [10.68, 36.18], [10.75, 36.15], [11.0, 36.25], [11.53, 36.03], [11.75, 35.5], [11.53, 34.97], [11.0, 34.75], [10.75, 34.85], [10.5, 34.75], [10.25, 34.85], [10.0, 34.75], [9.75, 34.85], [9.5, 34.75], [9.25, 34.85], [9.0, 34.75], [8.75, 34.85], [8.5, 34.75], [8.0, 34.96], [7.5, 34.75], [6.97, 34.97], [6.82, 35.32], [6.75, 35.35], [6.5, 35.25], [5.97, 35.47], [5.75, 36.0], [5.97, 36.53], [6.32, 36.68], [6.47, 37.03]]]]}, "2021-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.97, 35.97], [7.75, 36.5], [7.97, 37.03], [8.5, 37.25], [8.75, 37.15], [9.0, 37.25], [9.5, 37.04], [10.0, 37.25], [10.53, 37.03], [10.75, 36.5], [10.65, 36.25], [10.68, 36.18], [10.75, 36.15], [11.0, 36.25], [11.53, 36.03], [11.75, 35.5], [11.53, 34.97], [11.0, 34.75], [10.75, 34.85], [10.5, 34.75], [10.25, 34.85], [10.0, 34.75], [9.75, 34.85], [9.5, 34.75], [9.25, 34.85], [9.0, 34.75], [8.47, 34.97], [8.25, 35.5], [8.38, 35.8], [7.97, 35.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.588314918482297}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.199893800403385}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.582963108138983, 14.8652035037195, 14.665219811970815, 17.002574413553134]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.597833979824713, 12.04273174150984, 11.91186537902962, 14.129662219748354]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.809131725571592, -4.526925324689424, -4.560489047219951, -3.215402333029965]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.285141979830769, -5.588314918482297, -5.380219758820715, -3.6087558282246732]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.37082081110977, -1.808335211140283, -1.8060122531829985, -1.3654159078898664]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.535818549134242, -2.2612362331014517, -2.0590559289727146, -1.5548199909286442]}}