{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:50.827293", "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-Jan-05_to_2018-Jan-08_84.0_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": 2018010000295}, "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": "January 05 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 08 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": 66540.0514621481}, "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": ["China"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.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": 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": 84.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "84.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 80.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 85.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.47, 38.97], [80.25, 39.5], [80.47, 40.03], [81.0, 40.25], [81.25, 40.15], [81.38, 40.2], [81.25, 40.5], [81.47, 41.03], [82.0, 41.25], [82.25, 41.15], [82.5, 41.25], [82.75, 41.15], [83.0, 41.25], [83.25, 41.15], [83.5, 41.25], [84.03, 41.03], [84.18, 40.68], [84.25, 40.65], [84.5, 40.75], [84.75, 40.65], [85.0, 40.75], [85.25, 40.65], [85.5, 40.75], [86.03, 40.53], [86.25, 40.0], [86.15, 39.75], [86.25, 39.5], [86.03, 38.97], [85.68, 38.82], [85.53, 38.47], [85.0, 38.25], [84.75, 38.35], [84.68, 38.32], [84.53, 37.97], [84.0, 37.75], [83.47, 37.97], [83.3, 38.38], [83.0, 38.25], [82.47, 38.47], [82.32, 38.82], [82.25, 38.85], [82.0, 38.75], [81.75, 38.85], [81.5, 38.75], [81.25, 38.85], [81.0, 38.75], [80.47, 38.97]]]]}, "2018-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.47, 38.97], [80.25, 39.5], [80.47, 40.03], [81.0, 40.25], [81.25, 40.15], [81.38, 40.2], [81.25, 40.5], [81.47, 41.03], [82.0, 41.25], [82.25, 41.15], [82.5, 41.25], [82.75, 41.15], [82.82, 41.18], [82.97, 41.53], [83.5, 41.75], [84.03, 41.53], [84.18, 41.18], [84.53, 41.03], [84.68, 40.68], [84.75, 40.65], [85.0, 40.75], [85.25, 40.65], [85.5, 40.75], [86.03, 40.53], [86.25, 40.0], [86.15, 39.75], [86.25, 39.5], [86.03, 38.97], [85.68, 38.82], [85.53, 38.47], [85.0, 38.25], [84.75, 38.35], [84.68, 38.32], [84.53, 37.97], [84.0, 37.75], [83.47, 37.97], [83.3, 38.38], [83.0, 38.25], [82.47, 38.47], [82.32, 38.82], [82.25, 38.85], [82.0, 38.75], [81.75, 38.85], [81.5, 38.75], [81.25, 38.85], [81.0, 38.75], [80.47, 38.97]]]]}, "2018-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.47, 38.97], [80.25, 39.5], [80.47, 40.03], [81.0, 40.25], [81.25, 40.15], [81.38, 40.2], [81.25, 40.5], [81.47, 41.03], [82.0, 41.25], [82.25, 41.15], [82.5, 41.25], [82.75, 41.15], [82.82, 41.18], [82.97, 41.53], [83.5, 41.75], [84.03, 41.53], [84.18, 41.18], [84.53, 41.03], [84.68, 40.68], [84.75, 40.65], [85.0, 40.75], [85.25, 40.65], [85.5, 40.75], [86.03, 40.53], [86.25, 40.0], [86.15, 39.75], [86.25, 39.5], [86.03, 38.97], [85.68, 38.82], [85.53, 38.47], [85.0, 38.25], [84.75, 38.35], [84.68, 38.32], [84.53, 37.97], [84.0, 37.75], [83.47, 37.97], [83.3, 38.38], [83.0, 38.25], [82.47, 38.47], [82.32, 38.82], [82.25, 38.85], [82.0, 38.75], [81.75, 38.85], [81.5, 38.75], [81.25, 38.85], [81.0, 38.75], [80.47, 38.97]]]]}, "2018-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.75, 41.0], [82.97, 41.53], [83.5, 41.75], [84.03, 41.53], [84.18, 41.18], [84.53, 41.03], [84.75, 40.5], [84.63, 40.2], [85.03, 40.03], [85.25, 39.5], [85.03, 38.97], [84.5, 38.75], [84.25, 38.85], [84.0, 38.75], [83.47, 38.97], [83.25, 39.5], [83.46, 40.0], [83.32, 40.32], [82.97, 40.47], [82.75, 41.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.028327922055155}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.1575422324635385}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-13.270876594304298, -13.716972795334868, -13.617427105628394, -12.972765645089737]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-13.854444499319413, -14.719039144316127, -14.322863700517019, -13.297948231464034]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9717461680792323, -4.3505488202498475, -4.226876030254173, -3.5288339519229197]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.447272207456535, -5.028327922055155, -4.732443439940596, -3.6482937159715334]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3437035893197828, -1.4557448924227891, -1.421970370988077, -1.2015397256925338]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4435034988032267, -1.6565267654521891, -1.5628102981767258, -1.2585501686816987]}}