{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:26.985279", "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": "2023-Jan-27_to_2023-Feb-01_11.0_29.5"}, "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": 2023010001257}, "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 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 01 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 51336.35182340296}, "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": ["Libya"]}, "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": 29.5}, "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": 11.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "11.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 10.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[10.47, 30.03], [11.0, 30.25], [11.25, 30.15], [11.5, 30.25], [11.75, 30.15], [11.77, 30.16], [11.82, 30.18], [11.97, 30.53], [12.5, 30.75], [12.75, 30.65], [13.0, 30.75], [13.25, 30.65], [13.5, 30.75], [14.03, 30.53], [14.18, 30.18], [14.25, 30.15], [14.5, 30.25], [15.03, 30.03], [15.25, 29.5], [15.03, 28.97], [14.5, 28.75], [14.25, 28.85], [14.0, 28.75], [13.5, 28.96], [13.13, 28.8], [13.25, 28.5], [13.03, 27.97], [12.68, 27.82], [12.53, 27.47], [12.0, 27.25], [11.75, 27.35], [11.68, 27.32], [11.53, 26.97], [11.0, 26.75], [10.47, 26.97], [10.25, 27.5], [10.35, 27.75], [10.32, 27.82], [9.97, 27.97], [9.75, 28.5], [9.97, 29.03], [10.32, 29.18], [10.35, 29.25], [10.25, 29.5], [10.47, 30.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.35, 29.25], [10.25, 29.5], [10.47, 30.03], [11.0, 30.25], [11.25, 30.15], [11.5, 30.25], [11.75, 30.15], [12.0, 30.25], [12.53, 30.03], [12.75, 29.5], [12.53, 28.97], [12.18, 28.82], [12.03, 28.47], [11.5, 28.25], [11.25, 28.35], [11.18, 28.32], [11.03, 27.97], [10.5, 27.75], [9.97, 27.97], [9.75, 28.5], [9.97, 29.03], [10.32, 29.18], [10.35, 29.25]]]]}, "2023-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.97, 27.97], [9.75, 28.5], [9.97, 29.03], [10.32, 29.18], [10.35, 29.25], [10.25, 29.5], [10.47, 30.03], [11.0, 30.25], [11.25, 30.15], [11.5, 30.25], [11.75, 30.15], [11.82, 30.18], [11.97, 30.53], [12.5, 30.75], [12.75, 30.65], [13.0, 30.75], [13.25, 30.65], [13.5, 30.75], [14.03, 30.53], [14.25, 30.0], [14.03, 29.47], [13.68, 29.32], [13.53, 28.97], [13.13, 28.8], [13.25, 28.5], [13.03, 27.97], [12.68, 27.82], [12.53, 27.47], [12.0, 27.25], [11.75, 27.35], [11.68, 27.32], [11.53, 26.97], [11.0, 26.75], [10.47, 26.97], [10.25, 27.5], [10.35, 27.75], [10.32, 27.82], [9.97, 27.97]]]]}, "2023-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.97, 27.97], [9.75, 28.5], [9.97, 29.03], [10.32, 29.18], [10.35, 29.25], [10.25, 29.5], [10.47, 30.03], [11.0, 30.25], [11.25, 30.15], [11.5, 30.25], [11.75, 30.15], [11.82, 30.18], [11.97, 30.53], [12.5, 30.75], [12.75, 30.65], [13.0, 30.75], [13.25, 30.65], [13.5, 30.75], [14.03, 30.53], [14.18, 30.18], [14.25, 30.15], [14.5, 30.25], [15.03, 30.03], [15.25, 29.5], [15.03, 28.97], [14.5, 28.75], [14.25, 28.85], [14.0, 28.75], [13.5, 28.96], [13.13, 28.8], [13.25, 28.5], [13.03, 27.97], [12.68, 27.82], [12.53, 27.47], [12.0, 27.25], [11.75, 27.35], [11.68, 27.32], [11.53, 26.97], [11.0, 26.75], [10.47, 26.97], [10.25, 27.5], [10.35, 27.75], [10.32, 27.82], [9.97, 27.97]]]]}, "2023-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.25, 28.0], [10.47, 28.53], [11.0, 28.75], [10.47, 28.97], [10.25, 29.5], [10.47, 30.03], [11.0, 30.25], [11.5, 30.04], [11.82, 30.18], [11.97, 30.53], [12.5, 30.75], [12.75, 30.65], [13.0, 30.75], 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-4.62910454051331}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.69208041760454}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.4625965614910115, 7.174711694320592, 7.725370022966331, 7.840677877325845, 7.252333168332996, 7.593433186660434]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.01651435422724, 6.573473888725857, 7.070619036439837, 7.1449860299192665, 6.2246316149650625, 6.9263672907495675]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3711088085049803, -3.9302584956885434, -3.450719642613559, -3.391551765242703, -4.026899649441547, -3.9085580131456936]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.869204672819478, -4.55688011887446, -3.856519054962291, -3.839864336834353, -4.62910454051331, -4.0665135532546515]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.254874470268384, -1.4034079110241438, -1.2177144171103402, -1.1590547492475662, -1.3489478705553246, -1.2206264462814074]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.40389294398034, -1.5507833578528736, -1.3903202028145565, -1.339207945884458, -1.5415675194888652, -1.3493231046618424]}}