{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:06.742101", "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": "2015-Jan-22_to_2015-Jan-24_255.5_35.5"}, "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": 2015010001063}, "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": "January 22 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 24 2015"}, "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": 131186.77604713073}, "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", "N.Central-America", "W.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": 35.5}, "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": 255.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "255.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 252.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 257.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.68, 35.18], [-106.53, 35.53], [-106.18, 35.68], [-106.03, 36.03], [-105.5, 36.25], [-105.2, 36.13], [-105.15, 36.25], [-105.25, 36.5], [-105.03, 37.03], [-104.5, 37.25], [-103.97, 37.03], [-103.82, 36.68], [-103.47, 36.53], [-103.32, 36.18], [-102.97, 36.03], [-102.82, 35.68], [-102.47, 35.53], [-102.25, 35.0], [-102.47, 34.47], [-102.82, 34.32], [-102.85, 34.25], [-102.75, 34.0], [-102.97, 33.47], [-103.32, 33.32], [-103.47, 32.97], [-103.87, 32.8], [-103.75, 32.5], [-103.85, 32.25], [-103.75, 32.0], [-103.85, 31.75], [-103.82, 31.68], [-103.5, 31.54], [-103.0, 31.75], [-102.47, 31.53], [-102.25, 31.0], [-102.47, 30.47], [-102.82, 30.32], [-102.97, 29.97], [-103.5, 29.75], [-104.03, 29.97], [-104.18, 30.32], [-104.25, 30.35], [-104.5, 30.25], [-104.75, 30.35], [-105.0, 30.25], [-105.53, 30.47], [-105.68, 30.82], [-106.03, 30.97], [-106.18, 31.32], [-106.53, 31.47], [-106.68, 31.82], [-107.03, 31.97], [-107.25, 32.5], [-107.03, 33.03], [-106.62, 33.2], [-106.68, 33.32], [-106.75, 33.35], [-107.0, 33.25], [-107.53, 33.47], [-107.75, 34.0], [-107.53, 34.53], [-107.18, 34.68], [-107.03, 35.03], [-106.68, 35.18]]]]}, "2015-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.68, 35.18], [-106.53, 35.53], [-106.18, 35.68], [-106.03, 36.03], [-105.5, 36.25], [-105.2, 36.13], [-105.15, 36.25], [-105.25, 36.5], [-105.03, 37.03], [-104.5, 37.25], [-103.97, 37.03], [-103.82, 36.68], [-103.47, 36.53], [-103.32, 36.18], [-102.97, 36.03], [-102.82, 35.68], [-102.47, 35.53], [-102.25, 35.0], [-102.47, 34.47], [-102.82, 34.32], [-102.85, 34.25], [-102.75, 34.0], [-102.97, 33.47], [-103.32, 33.32], [-103.47, 32.97], [-103.87, 32.8], [-103.75, 32.5], [-103.85, 32.25], [-103.75, 32.0], [-103.85, 31.75], [-103.82, 31.68], [-103.5, 31.54], [-103.0, 31.75], [-102.47, 31.53], [-102.25, 31.0], [-102.47, 30.47], [-102.82, 30.32], [-102.97, 29.97], [-103.5, 29.75], [-104.03, 29.97], [-104.18, 30.32], [-104.25, 30.35], [-104.5, 30.25], [-104.75, 30.35], [-105.0, 30.25], [-105.53, 30.47], [-105.68, 30.82], [-106.03, 30.97], [-106.18, 31.32], [-106.53, 31.47], [-106.68, 31.82], [-107.03, 31.97], [-107.25, 32.5], [-107.03, 33.03], [-106.62, 33.2], [-106.68, 33.32], [-106.75, 33.35], [-107.0, 33.25], [-107.53, 33.47], [-107.75, 34.0], [-107.53, 34.53], [-107.18, 34.68], [-107.03, 35.03], [-106.68, 35.18]]]]}, "2015-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.68, 35.18], [-106.53, 35.53], [-106.18, 35.68], [-106.03, 36.03], [-105.5, 36.25], [-105.2, 36.13], [-105.15, 36.25], [-105.25, 36.5], [-105.03, 37.03], [-104.5, 37.25], [-103.97, 37.03], [-103.82, 36.68], [-103.47, 36.53], [-103.32, 36.18], [-102.97, 36.03], [-102.82, 35.68], [-102.47, 35.53], [-102.25, 35.0], [-102.47, 34.47], [-102.82, 34.32], [-102.85, 34.25], [-102.75, 34.0], [-102.97, 33.47], [-103.32, 33.32], [-103.47, 32.97], [-103.87, 32.8], [-103.75, 32.5], [-103.85, 32.25], [-103.75, 32.0], [-103.85, 31.75], [-103.82, 31.68], [-103.5, 31.54], [-103.0, 31.75], [-102.47, 31.53], [-102.25, 31.0], [-102.47, 30.47], [-102.82, 30.32], [-102.97, 29.97], [-103.5, 29.75], [-104.03, 29.97], [-104.18, 30.32], [-104.25, 30.35], [-104.5, 30.25], [-104.75, 30.35], [-105.0, 30.25], [-105.53, 30.47], [-105.68, 30.82], [-106.03, 30.97], [-106.18, 31.32], [-106.53, 31.47], [-106.68, 31.82], [-107.03, 31.97], [-107.25, 32.5], [-107.03, 33.03], [-106.62, 33.2], [-106.68, 33.32], [-106.75, 33.35], [-107.0, 33.25], [-107.53, 33.47], [-107.75, 34.0], [-107.53, 34.53], [-107.18, 34.68], [-107.03, 35.03], [-106.68, 35.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.965316410900641}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.812434469574953}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-1.5463280836516446, -6.2495886117980035, -1.8492432613762162]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-6.4006078437646465, -14.01599206153395, -6.8276651662021095]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.126731065467089, -10.8963157688618, -6.414256574395979]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.9269061408581365, -15.965316410900641, -9.092123128412823]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5921476787758764, -2.9667802666355514, -1.7873581943733887]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.222861221431597, -4.218186160832229, -2.4159315904041865]}}