{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:04.295802", "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-Apr-24_to_2013-Apr-26_262.0_25.0"}, "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": 2013040000942}, "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 24 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 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": 159254.2117765166}, "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": 25.0}, "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": 262.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "262.0\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": 262.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.75}, "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": {"2013-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 28.25], [-102.25, 28.5], [-102.03, 29.03], [-101.68, 29.18], [-101.65, 29.25], [-101.75, 29.5], [-101.65, 29.75], [-101.75, 30.0], [-101.53, 30.53], [-101.0, 30.75], [-100.75, 30.65], [-100.5, 30.75], [-100.25, 30.65], [-100.0, 30.75], [-99.47, 30.53], [-99.25, 30.0], [-99.35, 29.75], [-99.25, 29.5], [-99.35, 29.25], [-99.32, 29.18], [-99.25, 29.15], [-99.0, 29.25], [-98.47, 29.03], [-98.32, 28.68], [-97.97, 28.53], [-97.75, 28.0], [-97.85, 27.75], [-97.82, 27.68], [-97.47, 27.53], [-97.25, 27.0], [-97.35, 26.75], [-97.25, 26.5], [-97.35, 26.25], [-97.32, 26.18], [-96.97, 26.03], [-96.75, 25.5], [-96.97, 24.97], [-97.32, 24.82], [-97.47, 24.47], [-98.0, 24.25], [-98.25, 24.35], [-98.5, 24.25], [-98.75, 24.35], [-99.0, 24.25], [-99.53, 24.47], [-99.68, 24.82], [-100.03, 24.97], [-100.18, 25.32], [-100.25, 25.35], [-100.5, 25.25], [-100.75, 25.35], [-101.0, 25.25], [-101.53, 25.47], [-101.75, 26.0], [-101.65, 26.25], [-101.75, 26.5], [-101.65, 26.75], [-101.68, 26.82], [-102.03, 26.97], [-102.25, 27.5], [-102.15, 27.75], [-102.25, 28.0], [-102.15, 28.25]]]]}, "2013-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 28.25], [-102.25, 28.5], [-102.03, 29.03], [-101.68, 29.18], [-101.65, 29.25], [-101.75, 29.5], [-101.65, 29.75], [-101.75, 30.0], [-101.53, 30.53], [-101.0, 30.75], [-100.75, 30.65], [-100.5, 30.75], [-100.25, 30.65], [-100.0, 30.75], [-99.47, 30.53], [-99.25, 30.0], [-99.35, 29.75], [-99.25, 29.5], [-99.35, 29.25], [-99.32, 29.18], [-99.25, 29.15], [-99.0, 29.25], [-98.47, 29.03], [-98.32, 28.68], [-97.97, 28.53], [-97.75, 28.0], [-97.85, 27.75], [-97.82, 27.68], [-97.47, 27.53], [-97.25, 27.0], [-97.35, 26.75], [-97.25, 26.5], [-97.35, 26.25], [-97.32, 26.18], [-96.97, 26.03], [-96.75, 25.5], [-96.97, 24.97], [-97.32, 24.82], [-97.47, 24.47], [-98.0, 24.25], [-98.25, 24.35], [-98.5, 24.25], [-98.75, 24.35], [-99.0, 24.25], [-99.53, 24.47], [-99.68, 24.82], [-100.03, 24.97], [-100.18, 25.32], [-100.25, 25.35], [-100.5, 25.25], [-100.75, 25.35], [-101.0, 25.25], [-101.53, 25.47], [-101.75, 26.0], [-101.65, 26.25], [-101.75, 26.5], [-101.65, 26.75], [-101.68, 26.82], [-102.03, 26.97], [-102.25, 27.5], [-102.15, 27.75], [-102.25, 28.0], [-102.15, 28.25]]]]}, "2013-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 28.25], [-102.25, 28.5], [-102.03, 29.03], [-101.68, 29.18], [-101.65, 29.25], [-101.75, 29.5], [-101.65, 29.75], [-101.75, 30.0], [-101.53, 30.53], [-101.0, 30.75], [-100.75, 30.65], [-100.5, 30.75], [-100.25, 30.65], [-100.0, 30.75], [-99.47, 30.53], [-99.25, 30.0], [-99.35, 29.75], [-99.25, 29.5], [-99.35, 29.25], [-99.32, 29.18], [-99.25, 29.15], [-99.0, 29.25], [-98.47, 29.03], [-98.32, 28.68], [-97.97, 28.53], [-97.75, 28.0], [-97.85, 27.75], [-97.82, 27.68], [-97.47, 27.53], [-97.25, 27.0], [-97.35, 26.75], [-97.25, 26.5], [-97.35, 26.25], [-97.32, 26.18], [-96.97, 26.03], [-96.75, 25.5], [-96.97, 24.97], [-97.32, 24.82], [-97.47, 24.47], [-98.0, 24.25], [-98.25, 24.35], [-98.5, 24.25], [-98.75, 24.35], [-99.0, 24.25], [-99.53, 24.47], [-99.68, 24.82], [-100.03, 24.97], [-100.18, 25.32], [-100.25, 25.35], [-100.5, 25.25], [-100.75, 25.35], [-101.0, 25.25], [-101.53, 25.47], [-101.75, 26.0], [-101.65, 26.25], [-101.75, 26.5], [-101.65, 26.75], [-101.68, 26.82], [-102.03, 26.97], [-102.25, 27.5], [-102.15, 27.75], [-102.25, 28.0], [-102.15, 28.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.82444089226658}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.756277309807223}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.603624861828223, 15.231933894164115, 19.85164768659189]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.396356622672954, 11.630949955226242, 16.652006832722066]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.6722220049067, -10.107911814819369, -5.48869810969559]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.310605701851728, -13.82444089226658, -7.148014725367091]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.4996204833319555, -3.220706598975699, -1.672310285080013]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-4.157203254528734, -4.70858590962942, -2.2759008814293007]}}