{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:43.214373", "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": "2022-Jan-08_to_2022-Jan-10_0.0_29.0"}, "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": 2022010000423}, "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 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 10 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 54932.48657034656}, "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"]}, "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": 29.0}, "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": 0.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "0.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -0.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-0.68, 28.68], [-0.65, 28.75], [-0.75, 29.0], [-0.53, 29.53], [0.0, 29.75], [0.53, 29.53], [0.75, 29.0], [0.65, 28.75], [0.75, 28.5], [0.63, 28.2], [1.03, 28.03], [1.18, 27.68], [1.25, 27.65], [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], [4.03, 28.03], [4.18, 27.68], [4.53, 27.53], [4.75, 27.0], [4.65, 26.75], [4.75, 26.5], [4.53, 25.97], [4.0, 25.75], [3.75, 25.85], [3.5, 25.75], [2.97, 25.97], [2.82, 26.32], [2.75, 26.35], [2.5, 26.25], [2.25, 26.35], [2.18, 26.32], [2.03, 25.97], [1.5, 25.75], [0.97, 25.97], [0.82, 26.32], [0.75, 26.35], [0.5, 26.25], [-0.03, 26.47], [-0.18, 26.82], [-0.25, 26.85], [-0.5, 26.75], [-1.03, 26.97], [-1.25, 27.5], [-1.15, 27.75], [-1.25, 28.0], [-1.03, 28.53], [-0.68, 28.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.25, 28.0], [-1.03, 28.53], [-0.68, 28.68], [-0.65, 28.75], [-0.75, 29.0], [-0.53, 29.53], [0.0, 29.75], [0.53, 29.53], [0.75, 29.0], [0.65, 28.75], [0.75, 28.5], [0.63, 28.2], [1.03, 28.03], [1.18, 27.68], [1.25, 27.65], [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], [4.03, 28.03], [4.18, 27.68], [4.53, 27.53], [4.75, 27.0], [4.65, 26.75], [4.75, 26.5], [4.53, 25.97], [4.0, 25.75], [3.75, 25.85], [3.5, 25.75], [2.97, 25.97], [2.82, 26.32], [2.75, 26.35], [2.5, 26.25], [2.25, 26.35], [2.18, 26.32], [2.03, 25.97], [1.5, 25.75], [0.97, 25.97], [0.82, 26.32], [0.75, 26.35], [0.5, 26.25], [-0.03, 26.47], [-0.18, 26.82], [-0.25, 26.85], [-0.5, 26.75], [-1.03, 26.97], [-1.25, 27.5], [-1.15, 27.75], [-1.25, 28.0]]]]}, "2022-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.25, 28.0], [-1.03, 28.53], [-0.68, 28.68], [-0.65, 28.75], [-0.75, 29.0], [-0.53, 29.53], [0.0, 29.75], [0.53, 29.53], [0.75, 29.0], [0.65, 28.75], [0.75, 28.5], [0.63, 28.2], [1.03, 28.03], [1.18, 27.68], [1.25, 27.65], [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], [4.03, 28.03], [4.18, 27.68], [4.53, 27.53], [4.75, 27.0], [4.65, 26.75], [4.75, 26.5], [4.53, 25.97], [4.0, 25.75], [3.75, 25.85], [3.5, 25.75], [2.97, 25.97], [2.82, 26.32], [2.75, 26.35], [2.5, 26.25], [2.25, 26.35], [2.18, 26.32], [2.03, 25.97], [1.5, 25.75], [0.97, 25.97], [0.82, 26.32], [0.75, 26.35], [0.5, 26.25], [-0.03, 26.47], [-0.18, 26.82], [-0.25, 26.85], [-0.5, 26.75], [-1.03, 26.97], [-1.25, 27.5], [-1.15, 27.75], [-1.25, 28.0]]]]}, "2022-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.25, 28.0], [-1.03, 28.53], [-0.68, 28.68], [-0.65, 28.75], [-0.75, 29.0], [-0.53, 29.53], [0.0, 29.75], [0.53, 29.53], [0.75, 29.0], [0.65, 28.75], [0.75, 28.5], [0.63, 28.2], [1.03, 28.03], [1.18, 27.68], [1.25, 27.65], [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], [4.03, 28.03], [4.18, 27.68], [4.53, 27.53], [4.75, 27.0], [4.65, 26.75], [4.75, 26.5], [4.53, 25.97], [4.0, 25.75], [3.75, 25.85], [3.5, 25.75], [2.97, 25.97], [2.82, 26.32], [2.75, 26.35], [2.5, 26.25], [2.25, 26.35], [2.18, 26.32], [2.03, 25.97], [1.5, 25.75], [0.97, 25.97], [0.82, 26.32], [0.75, 26.35], [0.5, 26.25], [-0.03, 26.47], [-0.18, 26.82], [-0.25, 26.85], [-0.5, 26.75], [-1.03, 26.97], [-1.25, 27.5], [-1.15, 27.75], [-1.25, 28.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.946991954025407}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.682547463805489}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.29386267063336, 9.945499652923047, 10.139013748876039]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.34131302267491, 6.836629163909208, 8.369924861566176]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.449890851012921, -3.885318256314062, -3.712433284089485]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.288382937221684, -4.7774963708073415, -4.946991954025407]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4269616857597032, -1.6197648195600138, -1.5511010424792195]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.736569781041723, -2.0252956810408755, -2.1342507146352956]}}