{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:20:38.693031", "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": "2020-Jul-06_to_2020-Jul-11_0.5_54.5"}, "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": 2020070000289}, "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": "July 06 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 11 2020"}, "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": 165786.88097442364}, "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": ["United Kingdom"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "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": ["North Sea"]}, "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": 54.5}, "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": 0.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "0.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -2.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 7.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-07-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.47, 55.53], [5.0, 55.75], [5.25, 55.65], [5.5, 55.75], [6.03, 55.53], [6.18, 55.18], [6.53, 55.03], [6.75, 54.5], [6.53, 53.97], [6.0, 53.75], [5.75, 53.85], [5.5, 53.75], [5.25, 53.85], [5.0, 53.75], [4.75, 53.85], [4.68, 53.82], [4.53, 53.47], [4.0, 53.25], [3.47, 53.47], [3.25, 54.0], [3.47, 54.53], [3.82, 54.68], [3.97, 55.03], [4.32, 55.18], [4.47, 55.53]]], [[[-1.03, 55.53], [-0.68, 55.68], [-0.53, 56.03], [0.0, 56.25], [0.25, 56.15], [0.5, 56.25], [1.03, 56.03], [1.18, 55.68], [1.53, 55.53], [1.75, 55.0], [1.65, 54.75], [1.68, 54.68], [2.03, 54.53], [2.25, 54.0], [2.03, 53.47], [1.5, 53.25], [1.25, 53.35], [1.0, 53.25], [0.75, 53.35], [0.5, 53.25], [-0.03, 53.47], [-0.18, 53.82], [-0.53, 53.97], [-0.68, 54.32], [-1.03, 54.47], [-1.25, 55.0], [-1.03, 55.53]]]]}, "2020-07-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.54, 55.5], [-2.75, 56.0], [-2.65, 56.25], [-2.75, 56.5], [-2.53, 57.03], [-2.0, 57.25], [-1.47, 57.03], [-1.32, 56.68], [-0.97, 56.53], [-0.75, 56.0], [-0.85, 55.75], [-0.82, 55.68], [-0.75, 55.65], [-0.68, 55.68], [-0.53, 56.03], [0.0, 56.25], [0.25, 56.15], [0.32, 56.18], [0.47, 56.53], [0.82, 56.68], [0.97, 57.03], [1.32, 57.18], [1.47, 57.53], [2.0, 57.75], [2.25, 57.65], [2.32, 57.68], [2.35, 57.75], [2.25, 58.0], [2.47, 58.53], [3.0, 58.75], [3.53, 58.53], [3.68, 58.18], [4.03, 58.03], [4.18, 57.68], [4.25, 57.65], [4.5, 57.75], [5.03, 57.53], [5.18, 57.18], [5.25, 57.15], [5.5, 57.25], [5.75, 57.15], [6.0, 57.25], [6.5, 57.04], [7.0, 57.25], [7.53, 57.03], [7.75, 56.5], [7.65, 56.25], [7.75, 56.0], [7.65, 55.75], [7.75, 55.5], [7.53, 54.97], [7.18, 54.82], [7.03, 54.47], [6.68, 54.32], [6.53, 53.97], [6.0, 53.75], [5.75, 53.85], [5.5, 53.75], [5.25, 53.85], [5.0, 53.75], [4.75, 53.85], [4.68, 53.82], [4.53, 53.47], [4.0, 53.25], [3.47, 53.47], [3.25, 54.0], [3.47, 54.53], [3.82, 54.68], [3.97, 55.03], [4.32, 55.18], [4.35, 55.25], [4.25, 55.5], [4.38, 55.8], [4.25, 55.85], [4.0, 55.75], [3.75, 55.85], [3.62, 55.8], [3.75, 55.5], [3.53, 54.97], [3.12, 54.8], [3.25, 54.5], [3.03, 53.97], [2.68, 53.82], [2.53, 53.47], [2.0, 53.25], [1.75, 53.35], [1.5, 53.25], [1.25, 53.35], [1.0, 53.25], [0.75, 53.35], [0.68, 53.32], [0.53, 52.97], [0.18, 52.82], [0.03, 52.47], [-0.5, 52.25], [-0.75, 52.35], [-1.0, 52.25], [-1.25, 52.35], [-1.5, 52.25], [-2.03, 52.47], [-2.18, 52.82], [-2.53, 52.97], [-2.75, 53.5], [-2.54, 54.0], [-2.75, 54.5], [-2.65, 54.75], [-2.75, 55.0], [-2.54, 55.5]]]]}, "2020-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.54, 55.5], [-2.75, 56.0], [-2.65, 56.25], [-2.75, 56.5], [-2.53, 57.03], [-2.0, 57.25], [-1.47, 57.03], [-1.32, 56.68], [-0.97, 56.53], [-0.75, 56.0], [-0.85, 55.75], [-0.82, 55.68], [-0.75, 55.65], [-0.68, 55.68], [-0.53, 56.03], [0.0, 56.25], [0.25, 56.15], [0.32, 56.18], [0.47, 56.53], [0.82, 56.68], [0.97, 57.03], [1.32, 57.18], [1.47, 57.53], [2.0, 57.75], [2.25, 57.65], [2.32, 57.68], [2.35, 57.75], [2.25, 58.0], [2.47, 58.53], [3.0, 58.75], [3.53, 58.53], [3.68, 58.18], [4.03, 58.03], [4.18, 57.68], [4.25, 57.65], [4.5, 57.75], [5.03, 57.53], [5.18, 57.18], [5.25, 57.15], [5.5, 57.25], [5.75, 57.15], [6.0, 57.25], [6.5, 57.04], [7.0, 57.25], [7.53, 57.03], [7.75, 56.5], [7.65, 56.25], [7.75, 56.0], [7.65, 55.75], [7.75, 55.5], [7.65, 55.25], [7.75, 55.0], [7.53, 54.47], [7.0, 54.25], [6.75, 54.35], [6.68, 54.32], [6.53, 53.97], [6.0, 53.75], [5.75, 53.85], [5.5, 53.75], [5.25, 53.85], [5.0, 53.75], [4.75, 53.85], [4.68, 53.82], [4.53, 53.47], [4.0, 53.25], [3.47, 53.47], [3.32, 53.82], [3.25, 53.85], [3.0, 53.75], [2.75, 53.85], [2.68, 53.82], [2.53, 53.47], [2.0, 53.25], [1.75, 53.35], [1.5, 53.25], [1.25, 53.35], [1.0, 53.25], [0.75, 53.35], [0.68, 53.32], [0.53, 52.97], [0.18, 52.82], [0.03, 52.47], [-0.5, 52.25], [-0.75, 52.35], [-1.0, 52.25], [-1.25, 52.35], [-1.5, 52.25], [-2.03, 52.47], [-2.18, 52.82], [-2.53, 52.97], [-2.75, 53.5], [-2.54, 54.0], [-2.75, 54.5], [-2.65, 54.75], [-2.75, 55.0], [-2.54, 55.5]], [[4.0, 55.75], [3.75, 55.85], [3.62, 55.8], [3.68, 55.68], [3.75, 55.65], [4.0, 55.75]], [[4.3, 55.63], [4.38, 55.8], [4.25, 55.85], [4.0, 55.75], [4.3, 55.63]]]]}, "2020-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.54, 55.5], [-2.75, 56.0], [-2.65, 56.25], [-2.75, 56.5], [-2.53, 57.03], [-2.0, 57.25], [-1.47, 57.03], [-1.32, 56.68], [-0.97, 56.53], [-0.75, 56.0], [-0.85, 55.75], [-0.82, 55.68], [-0.75, 55.65], [-0.68, 55.68], [-0.53, 56.03], [0.0, 56.25], [0.25, 56.15], [0.32, 56.18], [0.47, 56.53], [0.82, 56.68], [0.97, 57.03], [1.32, 57.18], [1.47, 57.53], [2.0, 57.75], [2.25, 57.65], [2.32, 57.68], [2.35, 57.75], [2.25, 58.0], [2.47, 58.53], [3.0, 58.75], [3.53, 58.53], [3.68, 58.18], [4.03, 58.03], [4.18, 57.68], [4.25, 57.65], [4.5, 57.75], [5.03, 57.53], [5.18, 57.18], [5.25, 57.15], [5.5, 57.25], [5.75, 57.15], [6.0, 57.25], [6.5, 57.04], [7.0, 57.25], [7.53, 57.03], [7.75, 56.5], [7.65, 56.25], [7.75, 56.0], [7.65, 55.75], [7.75, 55.5], [7.65, 55.25], [7.75, 55.0], [7.53, 54.47], [7.0, 54.25], [6.75, 54.35], [6.5, 54.25], [6.25, 54.35], [6.18, 54.32], [6.03, 53.97], [5.5, 53.75], [5.25, 53.85], [5.0, 53.75], [4.75, 53.85], [4.5, 53.75], [4.25, 53.85], [4.0, 53.75], [3.75, 53.85], [3.5, 53.75], [3.25, 53.85], [3.0, 53.75], [2.75, 53.85], [2.68, 53.82], [2.53, 53.47], [2.0, 53.25], [1.75, 53.35], [1.5, 53.25], [1.25, 53.35], [1.0, 53.25], [0.75, 53.35], [0.68, 53.32], [0.53, 52.97], [0.18, 52.82], [0.03, 52.47], [-0.5, 52.25], [-0.75, 52.35], [-1.0, 52.25], [-1.25, 52.35], [-1.5, 52.25], [-2.03, 52.47], [-2.18, 52.82], [-2.25, 52.85], [-2.5, 52.75], [-3.03, 52.97], [-3.25, 53.5], [-3.03, 54.03], [-2.62, 54.2], [-2.75, 54.5], [-2.65, 54.75], [-2.75, 55.0], [-2.54, 55.5]], [[4.0, 55.75], [3.75, 55.85], [3.62, 55.8], [3.68, 55.68], [3.75, 55.65], [4.0, 55.75]], [[4.3, 55.63], [4.38, 55.8], [4.25, 55.85], [4.0, 55.75], [4.3, 55.63]]]]}, "2020-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.53, 55.53], [-2.18, 55.68], [-2.15, 55.75], [-2.18, 55.82], [-2.53, 55.97], [-2.75, 56.5], [-2.53, 57.03], [-2.0, 57.25], [-1.47, 57.03], [-1.32, 56.68], [-0.97, 56.53], [-0.75, 56.0], [-0.85, 55.75], [-0.82, 55.68], [-0.75, 55.65], [-0.68, 55.68], [-0.53, 56.03], [0.0, 56.25], [0.25, 56.15], [0.5, 56.25], [0.75, 56.15], [1.0, 56.25], [1.25, 56.15], [1.5, 56.25], [1.75, 56.15], [2.0, 56.25], [2.25, 56.15], [2.5, 56.25], [3.03, 56.03], [3.18, 55.68], [3.25, 55.65], [3.5, 55.75], [3.75, 55.65], [4.0, 55.75], [4.5, 55.54], [5.0, 55.75], [5.25, 55.65], [5.32, 55.68], [5.47, 56.03], [6.0, 56.25], [6.25, 56.15], [6.5, 56.25], [7.03, 56.03], [7.18, 55.68], [7.53, 55.53], [7.75, 55.0], [7.53, 54.47], [7.0, 54.25], [6.75, 54.35], [6.5, 54.25], [6.2, 54.38], [6.03, 53.97], [5.5, 53.75], [5.25, 53.85], [5.0, 53.75], [4.75, 53.85], [4.5, 53.75], [4.25, 53.85], [4.0, 53.75], [3.75, 53.85], [3.5, 53.75], [3.25, 53.85], [3.0, 53.75], [2.75, 53.85], [2.68, 53.82], [2.53, 53.47], [2.0, 53.25], [1.75, 53.35], [1.5, 53.25], [1.25, 53.35], [1.0, 53.25], [0.75, 53.35], [0.68, 53.32], [0.53, 52.97], [0.18, 52.82], [0.03, 52.47], [-0.5, 52.25], [-0.75, 52.35], [-1.0, 52.25], [-1.25, 52.35], [-1.5, 52.25], [-2.03, 52.47], [-2.18, 52.82], [-2.25, 52.85], [-2.5, 52.75], [-3.03, 52.97], [-3.25, 53.5], [-3.03, 54.03], [-2.62, 54.2], [-2.75, 54.5], [-2.65, 54.75], [-2.75, 55.0], [-2.53, 55.53]]]]}, "2020-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.03, 52.97], [-3.25, 53.5], [-3.03, 54.03], [-2.5, 54.25], [-2.25, 54.15], [-2.0, 54.25], [-1.75, 54.15], [-1.5, 54.25], [-1.25, 54.15], [-1.0, 54.25], [-0.75, 54.15], [-0.62, 54.2], [-0.75, 54.5], [-0.53, 55.03], [0.0, 55.25], [0.25, 55.15], [0.5, 55.25], [1.03, 55.03], [1.18, 54.68], [1.25, 54.65], [1.5, 54.75], [2.03, 54.53], [2.25, 54.0], [2.03, 53.47], [1.5, 53.25], [1.25, 53.35], [1.0, 53.25], [0.75, 53.35], [0.5, 53.25], [0.2, 53.38], [0.15, 53.25], [0.25, 53.0], [0.03, 52.47], [-0.5, 52.25], [-0.75, 52.35], [-1.0, 52.25], [-1.25, 52.35], [-1.5, 52.25], [-2.03, 52.47], [-2.18, 52.82], [-2.25, 52.85], [-2.5, 52.75], [-3.03, 52.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8779520318501}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.207269917269822}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.896152615739936, 12.453828721128104, 12.437710115461812, 12.559906168850262, 12.736839134576428, 13.132786396147878]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.55253167127114, 10.810325208209747, 11.001876704148401, 10.870712915262743, 11.352125405055745, 11.984296016652308]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7229192627603513, -2.147412384503672, -2.260159235060019, -2.203987017621703, -2.3127314015070155, -2.4427429785908954]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9477863986452348, -3.7058877583170897, -3.3251086301928012, -3.8779520318501, -3.5586579446306246, -3.1023518634369793]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3810268889776693, -1.4481403800846866, -1.5689047795050841, -1.508413485582101, -1.5917331751006933, -1.3981088557646473]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.48728960291734, -1.683654537916405, -2.004430090598193, -1.8559674327657067, -2.0959143654893744, -1.5915577796255649]}}