{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:31.333999", "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-Apr-23_to_2019-Apr-25_353.0_42.0"}, "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": 2019040000630}, "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": "April 23 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2019"}, "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": 55983.27756951977}, "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": ["Portugal", "Spain"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": 42.0}, "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": 353.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "353.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 351.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.65, 41.75], [-8.75, 42.0], [-8.53, 42.53], [-8.18, 42.68], [-8.03, 43.03], [-7.5, 43.25], [-6.97, 43.03], [-6.82, 42.68], [-6.75, 42.65], [-6.5, 42.75], [-5.97, 42.53], [-5.82, 42.18], [-5.47, 42.03], [-5.25, 41.5], [-5.35, 41.25], [-5.32, 41.18], [-5.25, 41.15], [-5.0, 41.25], [-4.47, 41.03], [-4.32, 40.68], [-3.97, 40.53], [-3.75, 40.0], [-3.97, 39.47], [-4.32, 39.32], [-4.47, 38.97], [-5.0, 38.75], [-5.53, 38.97], [-5.68, 39.32], [-5.75, 39.35], [-6.0, 39.25], [-6.25, 39.35], [-6.5, 39.25], [-7.03, 39.47], [-7.25, 40.0], [-7.12, 40.3], [-7.25, 40.35], [-7.5, 40.25], [-7.75, 40.35], [-8.0, 40.25], [-8.53, 40.47], [-8.75, 41.0], [-8.65, 41.25], [-8.75, 41.5], [-8.65, 41.75]]]]}, "2019-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.65, 41.75], [-8.75, 42.0], [-8.53, 42.53], [-8.18, 42.68], [-8.03, 43.03], [-7.5, 43.25], [-6.97, 43.03], [-6.82, 42.68], [-6.75, 42.65], [-6.5, 42.75], [-5.97, 42.53], [-5.82, 42.18], [-5.47, 42.03], [-5.25, 41.5], [-5.35, 41.25], [-5.32, 41.18], [-5.25, 41.15], [-5.0, 41.25], [-4.47, 41.03], [-4.32, 40.68], [-3.97, 40.53], [-3.75, 40.0], [-3.97, 39.47], [-4.32, 39.32], [-4.47, 38.97], [-5.0, 38.75], [-5.53, 38.97], [-5.68, 39.32], [-5.75, 39.35], [-6.0, 39.25], [-6.25, 39.35], [-6.5, 39.25], [-7.03, 39.47], [-7.25, 40.0], [-7.12, 40.3], [-7.25, 40.35], [-7.5, 40.25], [-7.75, 40.35], [-8.0, 40.25], [-8.53, 40.47], [-8.75, 41.0], [-8.65, 41.25], [-8.75, 41.5], [-8.65, 41.75]]]]}, "2019-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.65, 41.75], [-8.75, 42.0], [-8.53, 42.53], [-8.18, 42.68], [-8.03, 43.03], [-7.5, 43.25], [-6.97, 43.03], [-6.82, 42.68], [-6.75, 42.65], [-6.5, 42.75], [-5.97, 42.53], [-5.82, 42.18], [-5.47, 42.03], [-5.25, 41.5], [-5.35, 41.25], [-5.32, 41.18], [-5.25, 41.15], [-5.0, 41.25], [-4.47, 41.03], [-4.32, 40.68], [-3.97, 40.53], [-3.75, 40.0], [-3.97, 39.47], [-4.32, 39.32], [-4.47, 38.97], [-5.0, 38.75], [-5.53, 38.97], [-5.68, 39.32], [-5.75, 39.35], [-6.0, 39.25], [-6.25, 39.35], [-6.5, 39.25], [-7.03, 39.47], [-7.25, 40.0], [-7.12, 40.3], [-7.25, 40.35], [-7.5, 40.25], [-7.75, 40.35], [-8.0, 40.25], [-8.53, 40.47], [-8.75, 41.0], [-8.65, 41.25], [-8.75, 41.5], [-8.65, 41.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.95939564547831}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.713302766467961}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.066263102257722, 7.370431811883009, 7.404634958402937]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.232178257367593, 3.4356533392329425, 3.893720255237781]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.784386044171971, -4.6035400953933205, -4.75198215983859]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.228582212544097, -5.95939564547831, -5.65229365006104]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5404948680946626, -1.4177160183570638, -1.4129565989482546]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6959619578901117, -1.7317401704889062, -1.6125700770935365]}}