{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:28.059562", "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-Mar-04_to_2015-Mar-06_270.0_41.5"}, "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": 2015030000282}, "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": "March 04 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 06 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": 59624.277600233356}, "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": 41.5}, "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": 270.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 267.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.65, 42.75], [-92.75, 43.0], [-92.53, 43.53], [-92.18, 43.68], [-92.03, 44.03], [-91.68, 44.18], [-91.53, 44.53], [-91.0, 44.75], [-90.75, 44.65], [-90.5, 44.75], [-89.97, 44.53], [-89.75, 44.0], [-89.85, 43.75], [-89.75, 43.5], [-89.97, 42.97], [-90.32, 42.82], [-90.35, 42.75], [-90.32, 42.68], [-89.97, 42.53], [-89.82, 42.18], [-89.47, 42.03], [-89.25, 41.5], [-89.35, 41.25], [-89.25, 41.0], [-89.35, 40.75], [-89.25, 40.5], [-89.47, 39.97], [-90.0, 39.75], [-90.5, 39.96], [-91.0, 39.75], [-91.25, 39.85], [-91.5, 39.75], [-92.03, 39.97], [-92.25, 40.5], [-92.15, 40.75], [-92.25, 41.0], [-92.15, 41.25], [-92.18, 41.32], [-92.53, 41.47], [-92.75, 42.0], [-92.65, 42.25], [-92.75, 42.5], [-92.65, 42.75]]]]}, "2015-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.65, 42.75], [-92.75, 43.0], [-92.53, 43.53], [-92.18, 43.68], [-92.03, 44.03], [-91.68, 44.18], [-91.53, 44.53], [-91.0, 44.75], [-90.75, 44.65], [-90.5, 44.75], [-89.97, 44.53], [-89.75, 44.0], [-89.85, 43.75], [-89.75, 43.5], [-89.97, 42.97], [-90.32, 42.82], [-90.35, 42.75], [-90.32, 42.68], [-89.97, 42.53], [-89.82, 42.18], [-89.47, 42.03], [-89.25, 41.5], [-89.35, 41.25], [-89.25, 41.0], [-89.35, 40.75], [-89.25, 40.5], [-89.47, 39.97], [-90.0, 39.75], [-90.5, 39.96], [-91.0, 39.75], [-91.25, 39.85], [-91.5, 39.75], [-92.03, 39.97], [-92.25, 40.5], [-92.15, 40.75], [-92.25, 41.0], [-92.15, 41.25], [-92.18, 41.32], [-92.53, 41.47], [-92.75, 42.0], [-92.65, 42.25], [-92.75, 42.5], [-92.65, 42.75]]]]}, "2015-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.65, 42.75], [-92.75, 43.0], [-92.53, 43.53], [-92.18, 43.68], [-92.03, 44.03], [-91.68, 44.18], [-91.53, 44.53], [-91.0, 44.75], [-90.75, 44.65], [-90.5, 44.75], [-89.97, 44.53], [-89.75, 44.0], [-89.85, 43.75], [-89.75, 43.5], [-89.97, 42.97], [-90.32, 42.82], [-90.35, 42.75], [-90.32, 42.68], [-89.97, 42.53], [-89.82, 42.18], [-89.47, 42.03], [-89.25, 41.5], [-89.35, 41.25], [-89.25, 41.0], [-89.35, 40.75], [-89.25, 40.5], [-89.47, 39.97], [-90.0, 39.75], [-90.5, 39.96], [-91.0, 39.75], [-91.25, 39.85], [-91.5, 39.75], [-92.03, 39.97], [-92.25, 40.5], [-92.15, 40.75], [-92.25, 41.0], [-92.15, 41.25], [-92.18, 41.32], [-92.53, 41.47], [-92.75, 42.0], [-92.65, 42.25], [-92.75, 42.5], [-92.65, 42.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -16.43101291929159}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.803515479190006}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-8.915991122551759, -14.661528137931327, -10.010735384026646]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-11.76085057074863, -17.87493978341476, -13.200188095921362]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.219154556440113, -14.250121581816177, -9.941270299313706]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.2825749523426, -16.43101291929159, -13.04916173545297]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4201151163421482, -2.402110548357, -1.6073003408219881]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.518233762402485, -2.687743490343002, -2.1365720029037933]}}