{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:05:44.858770", "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": "2016-Jul-02_to_2016-Jul-04_268.5_39.5"}, "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": 2016070000142}, "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": "July 02 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 04 2016"}, "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": 178075.19721257163}, "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", "E.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": 39.5}, "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": 268.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "268.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 262.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.53, 41.03], [-97.18, 41.18], [-97.03, 41.53], [-96.5, 41.75], [-96.25, 41.65], [-96.0, 41.75], [-95.75, 41.65], [-95.5, 41.75], [-95.25, 41.65], [-95.18, 41.68], [-95.03, 42.03], [-94.5, 42.25], [-93.97, 42.03], [-93.82, 41.68], [-93.75, 41.65], [-93.5, 41.75], [-93.25, 41.65], [-93.0, 41.75], [-92.75, 41.65], [-92.5, 41.75], [-92.25, 41.65], [-92.0, 41.75], [-91.47, 41.53], [-91.32, 41.18], [-91.25, 41.15], [-91.0, 41.25], [-90.5, 41.04], [-90.0, 41.25], [-89.47, 41.03], [-89.32, 40.68], [-88.97, 40.53], [-88.75, 40.0], [-88.85, 39.75], [-88.75, 39.5], [-88.85, 39.25], [-88.75, 39.0], [-88.85, 38.75], [-88.75, 38.5], [-88.97, 37.97], [-89.32, 37.82], [-89.47, 37.47], [-90.0, 37.25], [-90.25, 37.35], [-90.5, 37.25], [-90.75, 37.35], [-91.0, 37.25], [-91.53, 37.47], [-91.68, 37.82], [-91.75, 37.85], [-92.0, 37.75], [-92.25, 37.85], [-92.5, 37.75], [-93.03, 37.97], [-93.18, 38.32], [-93.5, 38.46], [-94.0, 38.25], [-94.53, 38.47], [-94.68, 38.82], [-94.75, 38.85], [-95.0, 38.75], [-95.25, 38.85], [-95.5, 38.75], [-95.75, 38.85], [-96.0, 38.75], [-96.25, 38.85], [-96.5, 38.75], [-97.03, 38.97], [-97.18, 39.32], [-97.53, 39.47], [-97.75, 40.0], [-97.65, 40.25], [-97.75, 40.5], [-97.53, 41.03]]]]}, "2016-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.53, 41.03], [-97.18, 41.18], [-97.03, 41.53], [-96.5, 41.75], [-96.25, 41.65], [-96.0, 41.75], [-95.75, 41.65], [-95.5, 41.75], [-95.25, 41.65], [-95.18, 41.68], [-95.03, 42.03], [-94.5, 42.25], [-93.97, 42.03], [-93.82, 41.68], [-93.75, 41.65], [-93.5, 41.75], [-93.25, 41.65], [-93.0, 41.75], [-92.75, 41.65], [-92.5, 41.75], [-92.25, 41.65], [-92.0, 41.75], [-91.47, 41.53], [-91.32, 41.18], [-91.25, 41.15], [-91.0, 41.25], [-90.5, 41.04], [-90.0, 41.25], [-89.47, 41.03], [-89.32, 40.68], [-88.97, 40.53], [-88.75, 40.0], [-88.85, 39.75], [-88.75, 39.5], [-88.85, 39.25], [-88.75, 39.0], [-88.85, 38.75], [-88.75, 38.5], [-88.97, 37.97], [-89.32, 37.82], [-89.47, 37.47], [-90.0, 37.25], [-90.25, 37.35], [-90.5, 37.25], [-90.75, 37.35], [-91.0, 37.25], [-91.53, 37.47], [-91.68, 37.82], [-91.75, 37.85], [-92.0, 37.75], [-92.25, 37.85], [-92.5, 37.75], [-93.03, 37.97], [-93.18, 38.32], [-93.5, 38.46], [-94.0, 38.25], [-94.53, 38.47], [-94.68, 38.82], [-94.75, 38.85], [-95.0, 38.75], [-95.25, 38.85], [-95.5, 38.75], [-95.75, 38.85], [-96.0, 38.75], [-96.25, 38.85], [-96.5, 38.75], [-97.03, 38.97], [-97.18, 39.32], [-97.53, 39.47], [-97.75, 40.0], [-97.65, 40.25], [-97.75, 40.5], [-97.53, 41.03]]]]}, "2016-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.53, 41.03], [-97.18, 41.18], [-97.03, 41.53], [-96.5, 41.75], [-96.25, 41.65], [-96.0, 41.75], [-95.75, 41.65], [-95.5, 41.75], [-95.25, 41.65], [-95.18, 41.68], [-95.03, 42.03], [-94.5, 42.25], [-93.97, 42.03], [-93.82, 41.68], [-93.75, 41.65], [-93.5, 41.75], [-93.25, 41.65], [-93.0, 41.75], [-92.75, 41.65], [-92.5, 41.75], [-92.25, 41.65], [-92.0, 41.75], [-91.47, 41.53], [-91.32, 41.18], [-91.25, 41.15], [-91.0, 41.25], [-90.5, 41.04], [-90.0, 41.25], [-89.47, 41.03], [-89.32, 40.68], [-88.97, 40.53], [-88.75, 40.0], [-88.85, 39.75], [-88.75, 39.5], [-88.85, 39.25], [-88.75, 39.0], [-88.85, 38.75], [-88.75, 38.5], [-88.97, 37.97], [-89.32, 37.82], [-89.47, 37.47], [-90.0, 37.25], [-90.25, 37.35], [-90.5, 37.25], [-90.75, 37.35], [-91.0, 37.25], [-91.53, 37.47], [-91.68, 37.82], [-91.75, 37.85], [-92.0, 37.75], [-92.25, 37.85], [-92.5, 37.75], [-93.03, 37.97], [-93.18, 38.32], [-93.5, 38.46], [-94.0, 38.25], [-94.53, 38.47], [-94.68, 38.82], [-94.75, 38.85], [-95.0, 38.75], [-95.25, 38.85], [-95.5, 38.75], [-95.75, 38.85], [-96.0, 38.75], [-96.25, 38.85], [-96.5, 38.75], [-97.03, 38.97], [-97.18, 39.32], [-97.53, 39.47], [-97.75, 40.0], [-97.65, 40.25], [-97.75, 40.5], [-97.53, 41.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.750303827767425}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.83055331734486}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.45773929229631, 17.11263389260847, 20.62686746817411]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.91856195205554, 14.981907999350938, 19.56345532168035]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.283335832368412, -7.781973037385396, -4.426351082280755]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.4048326849816135, -9.750303827767425, -5.10179791078798]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7658436590512292, -2.6794185204962804, -1.533430379562852]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0254844109684425, -3.3918137810155664, -1.7800936363159363]}}