{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:48.062042", "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-Apr-28_to_2015-Apr-30_260.5_27.5"}, "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": 2015040001044}, "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 28 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 30 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": 76023.62363858751}, "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": ["Mexico", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-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": 27.5}, "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": 260.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 261.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.25, 30.0], [-102.03, 30.53], [-101.5, 30.75], [-101.25, 30.65], [-101.0, 30.75], [-100.75, 30.65], [-100.5, 30.75], [-100.25, 30.65], [-100.0, 30.75], [-99.75, 30.65], [-99.5, 30.75], [-98.97, 30.53], [-98.75, 30.0], [-98.85, 29.75], [-98.75, 29.5], [-98.85, 29.25], [-98.82, 29.18], [-98.47, 29.03], [-98.25, 28.5], [-98.35, 28.25], [-98.25, 28.0], [-98.35, 27.75], [-98.25, 27.5], [-98.35, 27.25], [-98.25, 27.0], [-98.35, 26.75], [-98.25, 26.5], [-98.47, 25.97], [-99.0, 25.75], [-99.53, 25.97], [-99.68, 26.32], [-99.75, 26.35], [-100.0, 26.25], [-100.53, 26.47], [-100.75, 27.0], [-100.65, 27.25], [-100.68, 27.32], [-101.03, 27.47], [-101.18, 27.82], [-101.53, 27.97], [-101.75, 28.5], [-101.65, 28.75], [-101.75, 29.0], [-101.65, 29.25], [-101.68, 29.32], [-102.03, 29.47], [-102.25, 30.0]]]]}, "2015-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.25, 30.0], [-102.03, 30.53], [-101.5, 30.75], [-101.25, 30.65], [-101.0, 30.75], [-100.75, 30.65], [-100.5, 30.75], [-100.25, 30.65], [-100.0, 30.75], [-99.75, 30.65], [-99.5, 30.75], [-98.97, 30.53], [-98.75, 30.0], [-98.85, 29.75], [-98.75, 29.5], [-98.85, 29.25], [-98.82, 29.18], [-98.47, 29.03], [-98.25, 28.5], [-98.35, 28.25], [-98.25, 28.0], [-98.35, 27.75], [-98.25, 27.5], [-98.35, 27.25], [-98.25, 27.0], [-98.35, 26.75], [-98.25, 26.5], [-98.47, 25.97], [-99.0, 25.75], [-99.53, 25.97], [-99.68, 26.32], [-99.75, 26.35], [-100.0, 26.25], [-100.53, 26.47], [-100.75, 27.0], [-100.65, 27.25], [-100.68, 27.32], [-101.03, 27.47], [-101.18, 27.82], [-101.53, 27.97], [-101.75, 28.5], [-101.65, 28.75], [-101.75, 29.0], [-101.65, 29.25], [-101.68, 29.32], [-102.03, 29.47], [-102.25, 30.0]]]]}, "2015-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.25, 30.0], [-102.03, 30.53], [-101.5, 30.75], [-101.25, 30.65], [-101.0, 30.75], [-100.75, 30.65], [-100.5, 30.75], [-100.25, 30.65], [-100.0, 30.75], [-99.75, 30.65], [-99.5, 30.75], [-98.97, 30.53], [-98.75, 30.0], [-98.85, 29.75], [-98.75, 29.5], [-98.85, 29.25], [-98.82, 29.18], [-98.47, 29.03], [-98.25, 28.5], [-98.35, 28.25], [-98.25, 28.0], [-98.35, 27.75], [-98.25, 27.5], [-98.35, 27.25], [-98.25, 27.0], [-98.35, 26.75], [-98.25, 26.5], [-98.47, 25.97], [-99.0, 25.75], [-99.53, 25.97], [-99.68, 26.32], [-99.75, 26.35], [-100.0, 26.25], [-100.53, 26.47], [-100.75, 27.0], [-100.65, 27.25], [-100.68, 27.32], [-101.03, 27.47], [-101.18, 27.82], [-101.53, 27.97], [-101.75, 28.5], [-101.65, 28.75], [-101.75, 29.0], [-101.65, 29.25], [-101.68, 29.32], [-102.03, 29.47], [-102.25, 30.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.5238360647935}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.492172676693893}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.060223156448274, 16.68480154290694, 18.82909750594075]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.410502766785498, 13.496644965452163, 16.03367425949824]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.625567586105112, -8.015875268643118, -5.835075175333448]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.136060891674276, -8.5238360647935, -7.122744991015566]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6597784767115584, -2.319681982374447, -1.6672863202584518]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1166619554351116, -2.4130366848097395, -1.993984171271029]}}