{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:48.023050", "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": "2017-May-04_to_2017-May-06_270.5_31.0"}, "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": 2017050000213}, "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 04 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 06 2017"}, "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": 63778.54268993607}, "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": ["C.North-America", "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": ["Gulf of Mexico"]}, "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": 31.0}, "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": 270.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 265.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.5, 31.25], [-93.25, 31.15], [-93.0, 31.25], [-92.75, 31.15], [-92.5, 31.25], [-92.0, 31.04], [-91.5, 31.25], [-91.25, 31.15], [-91.0, 31.25], [-90.75, 31.15], [-90.68, 31.18], [-90.65, 31.25], [-90.75, 31.5], [-90.65, 31.75], [-90.75, 32.0], [-90.53, 32.53], [-90.0, 32.75], [-89.75, 32.65], [-89.5, 32.75], [-89.25, 32.65], [-89.0, 32.75], [-88.47, 32.53], [-88.25, 32.0], [-88.35, 31.75], [-88.25, 31.5], [-88.35, 31.25], [-88.25, 31.0], [-88.47, 30.47], [-88.82, 30.32], [-88.97, 29.97], [-89.5, 29.75], [-89.75, 29.85], [-89.82, 29.82], [-89.97, 29.47], [-90.5, 29.25], [-90.75, 29.35], [-90.82, 29.32], [-90.97, 28.97], [-91.5, 28.75], [-92.03, 28.97], [-92.18, 29.32], [-92.25, 29.35], [-92.5, 29.25], [-92.75, 29.35], [-93.0, 29.25], [-93.5, 29.46], [-94.0, 29.25], [-94.53, 29.47], [-94.75, 30.0], [-94.53, 30.53], [-94.18, 30.68], [-94.03, 31.03], [-93.5, 31.25]]]]}, "2017-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.5, 31.25], [-93.25, 31.15], [-93.0, 31.25], [-92.75, 31.15], [-92.5, 31.25], [-92.0, 31.04], [-91.5, 31.25], [-91.25, 31.15], [-91.0, 31.25], [-90.75, 31.15], [-90.68, 31.18], [-90.65, 31.25], [-90.75, 31.5], [-90.65, 31.75], [-90.75, 32.0], [-90.53, 32.53], [-90.0, 32.75], [-89.75, 32.65], [-89.5, 32.75], [-89.25, 32.65], [-89.0, 32.75], [-88.47, 32.53], [-88.25, 32.0], [-88.35, 31.75], [-88.25, 31.5], [-88.35, 31.25], [-88.25, 31.0], [-88.47, 30.47], [-88.82, 30.32], [-88.97, 29.97], [-89.5, 29.75], [-89.75, 29.85], [-89.82, 29.82], [-89.97, 29.47], [-90.5, 29.25], [-90.75, 29.35], [-90.82, 29.32], [-90.97, 28.97], [-91.5, 28.75], [-92.03, 28.97], [-92.18, 29.32], [-92.25, 29.35], [-92.5, 29.25], [-92.75, 29.35], [-93.0, 29.25], [-93.5, 29.46], [-94.0, 29.25], [-94.53, 29.47], [-94.75, 30.0], [-94.53, 30.53], [-94.18, 30.68], [-94.03, 31.03], [-93.5, 31.25]]]]}, "2017-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.5, 31.25], [-93.25, 31.15], [-93.0, 31.25], [-92.75, 31.15], [-92.5, 31.25], [-92.0, 31.04], [-91.5, 31.25], [-91.25, 31.15], [-91.0, 31.25], [-90.75, 31.15], [-90.68, 31.18], [-90.65, 31.25], [-90.75, 31.5], [-90.65, 31.75], [-90.75, 32.0], [-90.53, 32.53], [-90.0, 32.75], [-89.75, 32.65], [-89.5, 32.75], [-89.25, 32.65], [-89.0, 32.75], [-88.47, 32.53], [-88.25, 32.0], [-88.35, 31.75], [-88.25, 31.5], [-88.35, 31.25], [-88.25, 31.0], [-88.47, 30.47], [-88.82, 30.32], [-88.97, 29.97], [-89.5, 29.75], [-89.75, 29.85], [-89.82, 29.82], [-89.97, 29.47], [-90.5, 29.25], [-90.75, 29.35], [-90.82, 29.32], [-90.97, 28.97], [-91.5, 28.75], [-92.03, 28.97], [-92.18, 29.32], [-92.25, 29.35], [-92.5, 29.25], [-92.75, 29.35], [-93.0, 29.25], [-93.5, 29.46], [-94.0, 29.25], [-94.53, 29.47], [-94.75, 30.0], [-94.53, 30.53], [-94.18, 30.68], [-94.03, 31.03], [-93.5, 31.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.447478372674254}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.784284723630003}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.41532796885741, 16.565853687082097, 18.310619134809144]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.054329829867754, 13.724062630890614, 16.69829407002561]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.5633410369529175, -5.659222882942966, -4.130290250994125]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.8318253938446105, -7.447478372674254, -4.660712293245581]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.612602901119972, -2.046492941538605, -1.5307614556751197]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8547179688219033, -2.5099497277864087, -1.8028889361180251]}}