{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:52.997020", "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": "2019-Jan-08_to_2019-Jan-11_28.0_31.0"}, "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": 2019010000282}, "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 08 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 11 2019"}, "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": 74744.30935840152}, "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": ["Egypt"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "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": ["Mediterranean Sea - Eastern Basin"]}, "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": 31.0}, "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": 28.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.25, 31.5], [25.47, 32.03], [26.0, 32.25], [26.25, 32.15], 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[28.18, 28.82], [28.03, 28.47], [27.5, 28.25], [27.25, 28.35], [27.0, 28.25], [26.75, 28.35], [26.5, 28.25], [26.25, 28.35], [26.0, 28.25], [25.47, 28.47], [25.25, 29.0], [25.47, 29.53], [25.82, 29.68], [25.85, 29.75], [25.82, 29.82], [25.75, 29.85], [25.5, 29.75], [24.97, 29.97], [24.75, 30.5], [24.97, 31.03], [25.32, 31.18], [25.35, 31.25], [25.25, 31.5]]]]}, "2019-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.25, 31.5], [25.47, 32.03], [26.0, 32.25], [26.25, 32.15], [26.5, 32.25], [26.75, 32.15], [27.0, 32.25], [27.53, 32.03], [27.68, 31.68], [27.75, 31.65], [28.0, 31.75], [28.25, 31.65], [28.5, 31.75], [28.75, 31.65], [29.0, 31.75], [29.53, 31.53], [29.75, 31.0], [29.54, 30.5], [29.75, 30.0], [29.53, 29.47], [29.0, 29.25], [28.75, 29.35], [28.68, 29.32], [28.53, 28.97], [28.18, 28.82], [28.03, 28.47], [27.5, 28.25], [27.25, 28.35], [27.0, 28.25], [26.75, 28.35], [26.5, 28.25], [26.25, 28.35], [26.0, 28.25], [25.47, 28.47], [25.25, 29.0], [25.47, 29.53], [25.82, 29.68], [25.85, 29.75], [25.82, 29.82], [25.75, 29.85], [25.5, 29.75], [24.97, 29.97], [24.75, 30.5], [24.97, 31.03], [25.32, 31.18], [25.35, 31.25], [25.25, 31.5]]]]}, "2019-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.75, 30.0], [25.85, 30.25], [25.75, 30.5], [25.85, 30.75], [25.75, 31.0], [25.97, 31.53], [26.5, 31.75], [26.75, 31.65], [27.0, 31.75], [27.25, 31.65], [27.5, 31.75], [27.75, 31.65], [28.0, 31.75], [28.25, 31.65], [28.5, 31.75], [29.03, 31.53], [29.25, 31.0], [29.13, 30.7], [29.53, 30.53], [29.75, 30.0], [29.53, 29.47], [29.0, 29.25], [28.75, 29.35], [28.68, 29.32], [28.53, 28.97], [28.18, 28.82], [28.03, 28.47], [27.5, 28.25], [27.25, 28.35], [27.0, 28.25], [26.75, 28.35], [26.5, 28.25], [26.25, 28.35], [26.0, 28.25], [25.47, 28.47], [25.25, 29.0], [25.47, 29.53], [25.82, 29.68], [25.85, 29.75], [25.75, 30.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.181808810779785}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.717181164536867}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.49566510795114, 8.593990236436184, 9.304229891967452, 9.833779737958764]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.858041082111015, 6.60422675798327, 7.381142523501239, 8.59726082185648]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.30070455342159, -4.410123160305675, -3.7030795798645966, -3.089711690485]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.9235796190941983, -5.181808810779785, -4.614062065065696, -3.9144885182599296]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.700386228902144, -2.258749101023208, -1.9999384889945049, -1.7261797632148037]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8752627600501135, -2.6732786623291718, -2.5661576118750844, -2.2526459980426217]}}