{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:07.413102", "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-Aug-04_to_2022-Aug-07_6.0_61.5"}, "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": 2022080000260}, "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": "August 04 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 07 2022"}, "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": 72555.60557559581}, "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": ["Norway"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 61.5}, "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": 6.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 5.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[8.68, 62.18], [8.75, 62.15], [9.0, 62.25], [9.53, 62.03], [9.75, 61.5], [9.65, 61.25], [9.75, 61.0], [9.53, 60.47], [9.18, 60.32], [9.15, 60.25], [9.25, 60.0], [9.03, 59.47], [8.5, 59.25], [8.25, 59.35], [8.18, 59.32], [8.15, 59.25], [8.25, 59.0], [8.03, 58.47], [7.68, 58.32], [7.53, 57.97], [7.0, 57.75], [6.75, 57.85], [6.5, 57.75], [5.97, 57.97], [5.75, 58.5], [5.85, 58.75], [5.82, 58.82], [5.75, 58.85], [5.5, 58.75], [4.97, 58.97], [4.75, 59.5], [4.96, 60.0], [4.75, 60.5], [4.85, 60.75], [4.75, 61.0], [4.85, 61.25], [4.75, 61.5], [4.85, 61.75], [4.75, 62.0], [4.97, 62.53], [5.5, 62.75], [5.75, 62.65], [5.82, 62.68], [5.97, 63.03], [6.5, 63.25], [6.75, 63.15], [7.0, 63.25], [7.25, 63.15], [7.5, 63.25], [8.03, 63.03], [8.18, 62.68], [8.53, 62.53], [8.68, 62.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.75, 61.5], [4.85, 61.75], [4.75, 62.0], [4.97, 62.53], [5.5, 62.75], [5.75, 62.65], [5.82, 62.68], [5.97, 63.03], [6.5, 63.25], [6.75, 63.15], [7.0, 63.25], [7.25, 63.15], [7.5, 63.25], [8.03, 63.03], [8.25, 62.5], [8.03, 61.97], [7.5, 61.75], [7.25, 61.85], [7.18, 61.82], [7.03, 61.47], [6.68, 61.32], [6.53, 60.97], [6.18, 60.82], [6.03, 60.47], [5.5, 60.25], [4.97, 60.47], [4.75, 61.0], [4.85, 61.25], [4.75, 61.5]]]]}, "2022-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.75, 61.0], [4.85, 61.25], [4.75, 61.5], [4.85, 61.75], [4.75, 62.0], [4.97, 62.53], [5.5, 62.75], [5.75, 62.65], [5.82, 62.68], [5.97, 63.03], [6.5, 63.25], [6.75, 63.15], [7.0, 63.25], [7.25, 63.15], [7.5, 63.25], [8.03, 63.03], [8.18, 62.68], [8.53, 62.53], [8.68, 62.18], [8.75, 62.15], [9.0, 62.25], [9.53, 62.03], [9.75, 61.5], [9.65, 61.25], [9.75, 61.0], [9.53, 60.47], [9.18, 60.32], [9.15, 60.25], [9.25, 60.0], [9.03, 59.47], [8.5, 59.25], [8.25, 59.35], [8.18, 59.32], [8.15, 59.25], [8.25, 59.0], [8.03, 58.47], [7.68, 58.32], [7.53, 57.97], [7.0, 57.75], [6.75, 57.85], [6.5, 57.75], [5.97, 57.97], [5.75, 58.5], [5.85, 58.75], [5.82, 58.82], [5.75, 58.85], [5.5, 58.75], [4.97, 58.97], [4.75, 59.5], [4.96, 60.0], [4.75, 60.5], [4.85, 60.75], [4.75, 61.0]]]]}, "2022-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.75, 61.0], [4.85, 61.25], [4.75, 61.5], [4.85, 61.75], [4.75, 62.0], [4.97, 62.53], [5.5, 62.75], [5.75, 62.65], [5.82, 62.68], [5.97, 63.03], [6.5, 63.25], [6.75, 63.15], [7.0, 63.25], [7.25, 63.15], [7.5, 63.25], [8.03, 63.03], [8.18, 62.68], [8.53, 62.53], [8.68, 62.18], [8.75, 62.15], [9.0, 62.25], [9.53, 62.03], [9.75, 61.5], [9.65, 61.25], [9.75, 61.0], [9.53, 60.47], [9.18, 60.32], [9.15, 60.25], [9.25, 60.0], [9.03, 59.47], [8.5, 59.25], [8.25, 59.35], [8.18, 59.32], [8.15, 59.25], [8.25, 59.0], [8.03, 58.47], [7.68, 58.32], [7.53, 57.97], [7.0, 57.75], [6.75, 57.85], [6.5, 57.75], [5.97, 57.97], [5.75, 58.5], [5.85, 58.75], [5.82, 58.82], [5.75, 58.85], [5.5, 58.75], [4.97, 58.97], [4.75, 59.5], [4.96, 60.0], [4.75, 60.5], [4.85, 60.75], [4.75, 61.0]]]]}, "2022-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.75, 60.5], [4.97, 61.03], [5.32, 61.18], [5.35, 61.25], [5.25, 61.5], [5.47, 62.03], [5.82, 62.18], [5.97, 62.53], [6.5, 62.75], [6.75, 62.65], [7.0, 62.75], [7.25, 62.65], [7.5, 62.75], [7.75, 62.65], [8.0, 62.75], [8.53, 62.53], [8.68, 62.18], [8.75, 62.15], [9.0, 62.25], [9.53, 62.03], [9.75, 61.5], [9.65, 61.25], [9.75, 61.0], [9.53, 60.47], [9.18, 60.32], [9.15, 60.25], [9.25, 60.0], [9.03, 59.47], [8.5, 59.25], [8.25, 59.35], [8.18, 59.32], [8.15, 59.25], [8.25, 59.0], [8.03, 58.47], [7.68, 58.32], [7.53, 57.97], [7.0, 57.75], [6.75, 57.85], [6.5, 57.75], [5.97, 57.97], [5.75, 58.5], [5.85, 58.75], [5.82, 58.82], [5.75, 58.85], [5.5, 58.75], [4.97, 58.97], [4.75, 59.5], [4.96, 60.0], [4.75, 60.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.232050154018225}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.345505249620105}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.64784671694639, 8.239393351898514, 7.445217377885626, 8.078161917231625]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.478150092544581, 4.977029403665142, 4.0326105017530836, 5.063849491881172]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3939471838894457, -4.278315354392905, -4.932659768781057, -3.9456447774921912]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.936663535286698, -5.420795907466356, -6.232050154018225, -4.827933630891948]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.324532262610205, -1.6190003570111138, -1.901516332785827, -1.490316946420674]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3836794215784716, -1.8518076639040455, -2.2115815680340978, -1.8220363128380122]}}