{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:25.866712", "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-Apr-20_to_2018-Apr-22_69.0_26.0"}, "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": 2018040000882}, "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 20 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 22 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": 79542.92995871457}, "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": ["India", "Pakistan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 26.0}, "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": 69.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "69.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 67.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 73.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.25, 27.0], [67.47, 27.53], [68.0, 27.75], [68.25, 27.65], [68.32, 27.68], [68.47, 28.03], [69.0, 28.25], [69.25, 28.15], [69.5, 28.25], [69.75, 28.15], [69.82, 28.18], [69.85, 28.25], [69.75, 28.5], [69.97, 29.03], [70.5, 29.25], [71.0, 29.04], [71.5, 29.25], [71.75, 29.15], [71.82, 29.18], [71.97, 29.53], [72.5, 29.75], [73.03, 29.53], [73.18, 29.18], [73.53, 29.03], [73.75, 28.5], [73.53, 27.97], [73.0, 27.75], [72.75, 27.85], [72.68, 27.82], [72.53, 27.47], [72.18, 27.32], [72.03, 26.97], [71.68, 26.82], [71.53, 26.47], [71.18, 26.32], [71.03, 25.97], [70.5, 25.75], [70.25, 25.85], [70.0, 25.75], [69.75, 25.85], [69.68, 25.82], [69.53, 25.47], [69.0, 25.25], [68.47, 25.47], [68.32, 25.82], [67.97, 25.97], [67.82, 26.32], [67.47, 26.47], [67.25, 27.0]]]]}, "2018-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.25, 27.0], [67.47, 27.53], [68.0, 27.75], [68.25, 27.65], [68.32, 27.68], [68.47, 28.03], [69.0, 28.25], [69.25, 28.15], [69.5, 28.25], [69.75, 28.15], [69.82, 28.18], [69.85, 28.25], [69.75, 28.5], [69.97, 29.03], [70.5, 29.25], [71.0, 29.04], [71.5, 29.25], [71.75, 29.15], [71.82, 29.18], [71.97, 29.53], [72.5, 29.75], [73.03, 29.53], [73.18, 29.18], [73.53, 29.03], [73.75, 28.5], [73.53, 27.97], [73.0, 27.75], [72.75, 27.85], [72.68, 27.82], [72.53, 27.47], [72.18, 27.32], [72.03, 26.97], [71.68, 26.82], [71.53, 26.47], [71.18, 26.32], [71.03, 25.97], [70.5, 25.75], [70.25, 25.85], [70.0, 25.75], [69.75, 25.85], [69.68, 25.82], [69.53, 25.47], [69.0, 25.25], [68.47, 25.47], [68.32, 25.82], [67.97, 25.97], [67.82, 26.32], [67.47, 26.47], [67.25, 27.0]]]]}, "2018-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.25, 27.0], [67.47, 27.53], [68.0, 27.75], [68.25, 27.65], [68.32, 27.68], [68.47, 28.03], [69.0, 28.25], [69.25, 28.15], [69.5, 28.25], [69.75, 28.15], [69.82, 28.18], [69.85, 28.25], [69.75, 28.5], [69.97, 29.03], [70.5, 29.25], [71.0, 29.04], [71.5, 29.25], [71.75, 29.15], [71.82, 29.18], [71.97, 29.53], [72.5, 29.75], [73.03, 29.53], [73.18, 29.18], [73.53, 29.03], [73.75, 28.5], [73.53, 27.97], [73.0, 27.75], [72.75, 27.85], [72.68, 27.82], [72.53, 27.47], [72.18, 27.32], [72.03, 26.97], [71.68, 26.82], [71.53, 26.47], [71.18, 26.32], [71.03, 25.97], [70.5, 25.75], [70.25, 25.85], [70.0, 25.75], [69.75, 25.85], [69.68, 25.82], [69.53, 25.47], [69.0, 25.25], [68.47, 25.47], [68.32, 25.82], [67.97, 25.97], [67.82, 26.32], [67.47, 26.47], [67.25, 27.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.397215392354383}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9048057445372066}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.16100902343885, 27.918083994733877, 29.196282771149697]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.614935853078123, 25.99149227302121, 27.551794293388355]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9393485554431047, -4.408612568621436, -3.366456109547079]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.908438369329986, -5.397215392354383, -3.852440294923838]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5604899024277472, -1.8835094451677574, -1.5736472361090916]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8338976686888344, -2.123044478805778, -2.1101759416571926]}}