{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:59.406647", "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-May-22_to_2015-May-25_249.5_29.0"}, "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": 2015050000778}, "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": "May 22 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 25 2015"}, "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": 111897.7423707355}, "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": 29.0}, "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": 249.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "249.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 246.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 251.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-113.75, 31.5], [-113.53, 32.03], [-113.18, 32.18], [-113.15, 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32.68], [-110.97, 32.53], [-110.82, 32.18], [-110.47, 32.03], [-110.32, 31.68], [-109.97, 31.53], [-109.82, 31.18], [-109.75, 31.15], [-109.68, 31.18], [-109.53, 31.53], [-109.0, 31.75], [-108.47, 31.53], [-108.25, 31.0], [-108.35, 30.75], [-108.25, 30.5], [-108.35, 30.25], [-108.25, 30.0], [-108.47, 29.47], [-108.82, 29.32], [-108.97, 28.97], [-109.32, 28.82], [-109.35, 28.75], [-109.25, 28.5], [-109.47, 27.97], [-110.0, 27.75], [-110.5, 27.96], [-111.0, 27.75], [-111.53, 27.97], [-111.68, 28.32], [-112.03, 28.47], [-112.25, 29.0], [-112.15, 29.25], [-112.18, 29.32], [-112.25, 29.35], [-112.5, 29.25], [-113.03, 29.47], [-113.25, 30.0], [-113.15, 30.25], [-113.25, 30.5], [-113.15, 30.75], [-113.18, 30.82], [-113.53, 30.97], [-113.75, 31.5]]]]}, "2015-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-113.75, 31.5], [-113.53, 32.03], [-113.18, 32.18], [-113.15, 32.25], [-113.25, 32.5], [-113.03, 33.03], [-112.5, 33.25], [-112.25, 33.15], [-112.0, 33.25], [-111.47, 33.03], [-111.32, 32.68], [-110.97, 32.53], [-110.82, 32.18], [-110.47, 32.03], [-110.32, 31.68], [-109.97, 31.53], [-109.82, 31.18], [-109.75, 31.15], [-109.68, 31.18], [-109.53, 31.53], [-109.0, 31.75], [-108.47, 31.53], [-108.25, 31.0], [-108.35, 30.75], [-108.25, 30.5], [-108.35, 30.25], [-108.25, 30.0], [-108.47, 29.47], [-108.82, 29.32], [-108.97, 28.97], [-109.32, 28.82], [-109.35, 28.75], [-109.25, 28.5], [-109.47, 27.97], [-110.0, 27.75], [-110.5, 27.96], [-111.0, 27.75], [-111.53, 27.97], [-111.68, 28.32], [-112.03, 28.47], [-112.25, 29.0], [-112.15, 29.25], [-112.18, 29.32], [-112.25, 29.35], [-112.5, 29.25], [-113.03, 29.47], [-113.25, 30.0], [-113.15, 30.25], [-113.25, 30.5], [-113.15, 30.75], [-113.18, 30.82], [-113.53, 30.97], [-113.75, 31.5]]]]}, "2015-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.03, 30.03], [-110.68, 30.18], [-110.65, 30.25], [-110.75, 30.5], [-110.53, 31.03], [-110.0, 31.25], [-109.75, 31.15], [-109.68, 31.18], [-109.53, 31.53], [-109.0, 31.75], [-108.47, 31.53], [-108.25, 31.0], [-108.35, 30.75], [-108.25, 30.5], [-108.35, 30.25], [-108.25, 30.0], [-108.47, 29.47], [-108.82, 29.32], [-108.97, 28.97], [-109.32, 28.82], [-109.35, 28.75], [-109.25, 28.5], [-109.47, 27.97], [-110.0, 27.75], [-110.53, 27.97], [-110.68, 28.32], [-111.03, 28.47], [-111.25, 29.0], [-111.15, 29.25], [-111.25, 29.5], [-111.03, 30.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.339006475678957}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.491822369644515}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.932551065752477, 20.4296697071033, 20.690811777986255, 21.352695244970505]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.313464743031147, 15.60517722053521, 16.20582620745313, 18.53159588677522]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.510354374465728, -4.756474489113718, -4.489124351550053, -3.602742954077161]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.029608971473806, -6.339006475678957, -5.178750195750922, -4.050708488224359]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5279580695095365, -1.6840217620516162, -1.6231279072760456, -1.4913179817734523]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.837319135707402, -1.9720459875497987, -1.914293467800878, -1.6789249718672967]}}