{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:55.592918", "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-Jun-18_to_2018-Jun-21_263.0_28.0"}, "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": 2018060000735}, "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": "June 18 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 21 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 73922.18277007193}, "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", "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": ["Gulf of Mexico"]}, "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": 28.0}, "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": 263.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "263.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 261.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 264.25}, "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": {"2018-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.65, 27.75], [-97.75, 28.0], [-97.53, 28.53], [-97.0, 28.75], [-96.75, 28.65], [-96.68, 28.68], [-96.65, 28.75], [-96.75, 29.0], [-96.53, 29.53], [-96.0, 29.75], [-95.47, 29.53], [-95.25, 29.0], [-95.35, 28.75], [-95.25, 28.5], [-95.35, 28.25], [-95.25, 28.0], [-95.35, 27.75], [-95.25, 27.5], [-95.35, 27.25], [-95.25, 27.0], [-95.47, 26.47], [-95.82, 26.32], [-95.97, 25.97], [-96.5, 25.75], [-96.8, 25.88], [-96.97, 25.47], [-97.5, 25.25], [-98.03, 25.47], [-98.25, 26.0], [-98.03, 26.53], [-97.62, 26.7], [-97.75, 27.0], [-97.65, 27.25], [-97.75, 27.5], [-97.65, 27.75]]]]}, "2018-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.03, 29.03], [-98.5, 29.25], [-98.25, 29.15], [-98.0, 29.25], [-97.75, 29.15], [-97.5, 29.25], [-97.25, 29.15], [-97.18, 29.18], [-97.03, 29.53], [-96.5, 29.75], [-96.25, 29.65], [-96.0, 29.75], [-95.47, 29.53], [-95.25, 29.0], [-95.35, 28.75], [-95.25, 28.5], [-95.35, 28.25], [-95.25, 28.0], [-95.35, 27.75], [-95.25, 27.5], [-95.35, 27.25], [-95.25, 27.0], [-95.47, 26.47], [-95.82, 26.32], [-95.97, 25.97], [-96.5, 25.75], [-96.8, 25.88], [-96.97, 25.47], [-97.5, 25.25], [-98.03, 25.47], [-98.18, 25.82], [-98.53, 25.97], [-98.75, 26.5], [-98.65, 26.75], [-98.75, 27.0], [-98.65, 27.25], [-98.68, 27.32], [-99.03, 27.47], [-99.25, 28.0], [-99.15, 28.25], [-99.25, 28.5], [-99.03, 29.03]]]]}, "2018-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.03, 29.03], [-98.5, 29.25], [-98.25, 29.15], [-98.0, 29.25], [-97.75, 29.15], [-97.5, 29.25], [-97.25, 29.15], [-97.18, 29.18], [-97.03, 29.53], [-96.5, 29.75], [-96.25, 29.65], [-96.0, 29.75], [-95.47, 29.53], [-95.25, 29.0], [-95.35, 28.75], [-95.25, 28.5], [-95.35, 28.25], [-95.25, 28.0], [-95.35, 27.75], [-95.25, 27.5], [-95.35, 27.25], [-95.25, 27.0], [-95.47, 26.47], [-95.82, 26.32], [-95.97, 25.97], [-96.5, 25.75], [-96.8, 25.88], [-96.97, 25.47], [-97.5, 25.25], [-98.03, 25.47], [-98.18, 25.82], [-98.53, 25.97], [-98.75, 26.5], [-98.65, 26.75], [-98.75, 27.0], [-98.65, 27.25], [-98.68, 27.32], [-99.03, 27.47], [-99.25, 28.0], [-99.15, 28.25], [-99.25, 28.5], [-99.03, 29.03]]]]}, "2018-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.03, 29.03], [-98.5, 29.25], [-98.25, 29.15], [-98.0, 29.25], [-97.75, 29.15], [-97.5, 29.25], [-97.25, 29.15], [-97.18, 29.18], [-97.03, 29.53], [-96.5, 29.75], [-96.25, 29.65], [-96.0, 29.75], [-95.47, 29.53], [-95.25, 29.0], [-95.47, 28.47], [-96.0, 28.25], [-96.25, 28.35], [-96.32, 28.32], [-96.35, 28.25], [-96.25, 28.0], [-96.47, 27.47], [-96.82, 27.32], [-96.85, 27.25], [-96.75, 27.0], [-96.85, 26.75], [-96.75, 26.5], [-96.85, 26.25], [-96.75, 26.0], [-96.97, 25.47], [-97.5, 25.25], [-98.03, 25.47], [-98.18, 25.82], [-98.53, 25.97], [-98.75, 26.5], [-98.65, 26.75], [-98.75, 27.0], [-98.65, 27.25], [-98.68, 27.32], [-99.03, 27.47], [-99.25, 28.0], [-99.15, 28.25], [-99.25, 28.5], [-99.03, 29.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.513770673073623}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.083782755416111}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.320612893581824, 26.428944532814057, 26.068546342797276, 26.224581015543038]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.004360477163686, 25.198625919398125, 24.9546460339173, 25.60533918662344]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3706323948304306, -1.9242611630332593, -2.291154875605891, -2.5531351340529795]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0525736444870404, -3.11704548041547, -4.513770673073623, -3.667057963877653]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9315330061388882, -1.8029087098181948, -2.0598928506298817, -1.9208030695894305]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2902142723848047, -2.2854810957825604, -2.7506509985195224, -2.3299461362478677]}}