{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:22.773316", "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": "2013-May-24_to_2013-May-26_272.5_40.5"}, "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": 2013050000992}, "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": "May 24 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 26 2013"}, "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": 75134.37802416658}, "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 States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": 40.5}, "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": 272.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 273.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.75}, "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": {"2013-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.65, 41.25], [-90.75, 41.5], [-90.65, 41.75], [-90.75, 42.0], [-90.65, 42.25], [-90.75, 42.5], [-90.53, 43.03], [-90.0, 43.25], [-89.75, 43.15], [-89.5, 43.25], [-88.97, 43.03], [-88.75, 42.5], [-88.85, 42.25], [-88.82, 42.18], [-88.75, 42.15], [-88.5, 42.25], [-87.97, 42.03], [-87.82, 41.68], [-87.47, 41.53], [-87.32, 41.18], [-86.97, 41.03], [-86.82, 40.68], [-86.47, 40.53], [-86.25, 40.0], [-86.47, 39.47], [-86.82, 39.32], [-86.85, 39.25], [-86.75, 39.0], [-86.97, 38.47], [-87.5, 38.25], [-87.75, 38.35], [-88.0, 38.25], [-88.25, 38.35], [-88.5, 38.25], [-89.03, 38.47], [-89.18, 38.82], [-89.53, 38.97], [-89.68, 39.32], [-90.03, 39.47], [-90.18, 39.82], [-90.53, 39.97], [-90.75, 40.5], [-90.65, 40.75], [-90.75, 41.0], [-90.65, 41.25]]]]}, "2013-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.65, 41.25], [-90.75, 41.5], [-90.65, 41.75], [-90.75, 42.0], [-90.65, 42.25], [-90.75, 42.5], [-90.53, 43.03], [-90.0, 43.25], [-89.75, 43.15], [-89.5, 43.25], [-88.97, 43.03], [-88.75, 42.5], [-88.85, 42.25], [-88.82, 42.18], [-88.75, 42.15], [-88.5, 42.25], [-87.97, 42.03], [-87.82, 41.68], [-87.47, 41.53], [-87.32, 41.18], [-86.97, 41.03], [-86.82, 40.68], [-86.47, 40.53], [-86.25, 40.0], [-86.47, 39.47], [-86.82, 39.32], [-86.85, 39.25], [-86.75, 39.0], [-86.97, 38.47], [-87.5, 38.25], [-87.75, 38.35], [-88.0, 38.25], [-88.25, 38.35], [-88.5, 38.25], [-89.03, 38.47], [-89.18, 38.82], [-89.53, 38.97], [-89.68, 39.32], [-90.03, 39.47], [-90.18, 39.82], [-90.53, 39.97], [-90.75, 40.5], [-90.65, 40.75], [-90.75, 41.0], [-90.65, 41.25]]]]}, "2013-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.65, 41.25], [-90.75, 41.5], [-90.65, 41.75], [-90.75, 42.0], [-90.65, 42.25], [-90.75, 42.5], [-90.53, 43.03], [-90.0, 43.25], [-89.75, 43.15], [-89.5, 43.25], [-88.97, 43.03], [-88.75, 42.5], [-88.85, 42.25], [-88.82, 42.18], [-88.75, 42.15], [-88.5, 42.25], [-87.97, 42.03], [-87.82, 41.68], [-87.47, 41.53], [-87.32, 41.18], [-86.97, 41.03], [-86.82, 40.68], [-86.47, 40.53], [-86.25, 40.0], [-86.47, 39.47], [-86.82, 39.32], [-86.85, 39.25], [-86.75, 39.0], [-86.97, 38.47], [-87.5, 38.25], [-87.75, 38.35], [-88.0, 38.25], [-88.25, 38.35], [-88.5, 38.25], [-89.03, 38.47], [-89.18, 38.82], [-89.53, 38.97], [-89.68, 39.32], [-90.03, 39.47], [-90.18, 39.82], [-90.53, 39.97], [-90.75, 40.5], [-90.65, 40.75], [-90.75, 41.0], [-90.65, 41.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.437849461188932}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.993475652242743}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.29224378762558, 11.952123315745439, 12.62817479420977]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.9673287447647, 10.194271478967323, 10.472456787897443]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.325502812428594, -7.001393766572235, -6.6535303777273995]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.437849461188932, -8.366495960322936, -7.740472882399104]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7320582877751447, -1.6690525690113587, -1.5473745869552233]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.992803445162108, -1.8979545452676163, -1.7344682119481047]}}