{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:07.155306", "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": "2018-Feb-21_to_2018-Feb-23_261.5_33.0"}, "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": 2018020000778}, "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": "February 21 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 23 2018"}, "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": 87865.60462668854}, "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"]}, "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": 33.0}, "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": 261.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "261.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 263.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.03, 34.03], [-100.68, 34.18], [-100.53, 34.53], [-100.0, 34.75], [-99.75, 34.65], [-99.68, 34.68], [-99.53, 35.03], [-99.18, 35.18], [-99.03, 35.53], [-98.5, 35.75], [-98.25, 35.65], [-98.0, 35.75], [-97.47, 35.53], [-97.25, 35.0], [-97.35, 34.75], [-97.25, 34.5], [-97.35, 34.25], [-97.32, 34.18], [-96.97, 34.03], [-96.75, 33.5], [-96.85, 33.25], [-96.82, 33.18], [-96.47, 33.03], [-96.25, 32.5], [-96.47, 31.97], [-96.82, 31.82], [-96.97, 31.47], [-97.5, 31.25], [-97.75, 31.35], [-98.0, 31.25], [-98.25, 31.35], [-98.5, 31.25], [-98.75, 31.35], [-98.82, 31.32], [-98.97, 30.97], [-99.5, 30.75], [-100.03, 30.97], [-100.25, 31.5], [-100.03, 32.03], [-99.68, 32.18], [-99.65, 32.25], [-99.68, 32.32], [-99.75, 32.35], [-100.0, 32.25], [-100.25, 32.35], [-100.5, 32.25], [-101.03, 32.47], [-101.25, 33.0], [-101.15, 33.25], [-101.25, 33.5], [-101.03, 34.03]]]]}, "2018-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.03, 34.03], [-100.68, 34.18], [-100.53, 34.53], [-100.0, 34.75], [-99.75, 34.65], [-99.68, 34.68], [-99.53, 35.03], [-99.18, 35.18], [-99.03, 35.53], [-98.5, 35.75], [-98.25, 35.65], [-98.0, 35.75], [-97.47, 35.53], [-97.25, 35.0], [-97.35, 34.75], [-97.25, 34.5], [-97.35, 34.25], [-97.32, 34.18], [-96.97, 34.03], [-96.75, 33.5], [-96.85, 33.25], [-96.82, 33.18], [-96.47, 33.03], [-96.25, 32.5], [-96.47, 31.97], [-96.82, 31.82], [-96.97, 31.47], [-97.5, 31.25], [-97.75, 31.35], [-98.0, 31.25], [-98.25, 31.35], [-98.5, 31.25], [-98.75, 31.35], [-98.82, 31.32], [-98.97, 30.97], [-99.5, 30.75], [-100.03, 30.97], [-100.25, 31.5], [-100.03, 32.03], [-99.68, 32.18], [-99.65, 32.25], [-99.68, 32.32], [-99.75, 32.35], [-100.0, 32.25], [-100.25, 32.35], [-100.5, 32.25], [-101.03, 32.47], [-101.25, 33.0], [-101.15, 33.25], [-101.25, 33.5], [-101.03, 34.03]]]]}, "2018-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.03, 34.03], [-100.68, 34.18], [-100.53, 34.53], [-100.0, 34.75], [-99.75, 34.65], [-99.68, 34.68], [-99.53, 35.03], [-99.18, 35.18], [-99.03, 35.53], [-98.5, 35.75], [-98.25, 35.65], [-98.0, 35.75], [-97.47, 35.53], [-97.25, 35.0], [-97.35, 34.75], [-97.25, 34.5], [-97.35, 34.25], [-97.32, 34.18], [-96.97, 34.03], [-96.75, 33.5], [-96.85, 33.25], [-96.82, 33.18], [-96.47, 33.03], [-96.25, 32.5], [-96.47, 31.97], [-96.82, 31.82], [-96.97, 31.47], [-97.5, 31.25], [-97.75, 31.35], [-98.0, 31.25], [-98.25, 31.35], [-98.5, 31.25], [-98.75, 31.35], [-98.82, 31.32], [-98.97, 30.97], [-99.5, 30.75], [-100.03, 30.97], [-100.25, 31.5], [-100.03, 32.03], [-99.68, 32.18], [-99.65, 32.25], [-99.68, 32.32], [-99.75, 32.35], [-100.0, 32.25], [-100.25, 32.35], [-100.5, 32.25], [-101.03, 32.47], [-101.25, 33.0], [-101.15, 33.25], [-101.25, 33.5], [-101.03, 34.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.368853579962433}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.383700548182771}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.014971248528240721, -0.9462733371628929, 2.3105665095097265]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.422283767961289, -2.8679434942219473, -0.1281955901502556]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.026116503631743, -11.876649529796778, -8.248335611119792]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.671406080983274, -13.368853579962433, -9.534293056696185]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.018599151350026, -2.18357412079727, -1.488177803818732]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.268456424318928, -2.476362976143492, -1.6646636104804928]}}