{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:33.532176", "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": "2022-Dec-24_to_2022-Dec-31_40.5_21.5"}, "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": 2022120001035}, "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": "December 24 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 31 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 192191.21366684567}, "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": ["Saudi Arabia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula"]}, "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": ["Red Sea"]}, "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": 21.5}, "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": 40.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "40.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 38.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 45.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.25, 22.0], [38.47, 22.53], [38.82, 22.68], [38.85, 22.75], [38.75, 23.0], [38.97, 23.53], [39.5, 23.75], [40.03, 23.53], [40.18, 23.18], [40.5, 23.04], [41.0, 23.25], [41.53, 23.03], [41.75, 22.5], [41.53, 21.97], [41.18, 21.82], [41.15, 21.75], [41.25, 21.5], [41.04, 21.0], [41.25, 20.5], [41.03, 19.97], [40.5, 19.75], [40.25, 19.85], [40.0, 19.75], [39.75, 19.85], [39.5, 19.75], [38.97, 19.97], [38.75, 20.5], [38.85, 20.75], [38.75, 21.0], [38.85, 21.25], [38.82, 21.32], [38.47, 21.47], [38.25, 22.0]]]]}, "2022-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.25, 22.0], [38.47, 22.53], [38.82, 22.68], [38.85, 22.75], [38.75, 23.0], [38.97, 23.53], [39.5, 23.75], [40.03, 23.53], [40.18, 23.18], [40.5, 23.04], [41.0, 23.25], [41.53, 23.03], [41.75, 22.5], [41.53, 21.97], [41.18, 21.82], [41.15, 21.75], [41.25, 21.5], [41.04, 21.0], [41.25, 20.5], [41.03, 19.97], [40.5, 19.75], [40.25, 19.85], [40.0, 19.75], [39.75, 19.85], [39.5, 19.75], [38.97, 19.97], [38.75, 20.5], [38.85, 20.75], [38.75, 21.0], [38.85, 21.25], [38.82, 21.32], [38.47, 21.47], [38.25, 22.0]]]]}, "2022-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.47, 23.03], [38.82, 23.18], [38.85, 23.25], [38.82, 23.32], [38.47, 23.47], [38.25, 24.0], [38.47, 24.53], [39.0, 24.75], [39.53, 24.53], [39.68, 24.18], [40.03, 24.03], [40.18, 23.68], [40.53, 23.53], [40.68, 23.18], [40.75, 23.15], [41.0, 23.25], [41.53, 23.03], [41.75, 22.5], [41.65, 22.25], [41.75, 22.0], [41.65, 21.75], [41.75, 21.5], [41.65, 21.25], [41.75, 21.0], [41.53, 20.47], [41.18, 20.32], [41.03, 19.97], [40.5, 19.75], [40.25, 19.85], [40.0, 19.75], [39.75, 19.85], [39.5, 19.75], [38.97, 19.97], [38.75, 20.5], [38.85, 20.75], [38.75, 21.0], [38.85, 21.25], [38.82, 21.32], [38.47, 21.47], [38.25, 22.0], [38.35, 22.25], [38.25, 22.5], [38.47, 23.03]]]]}, "2022-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.47, 23.03], [38.82, 23.18], [38.85, 23.25], [38.82, 23.32], [38.47, 23.47], [38.25, 24.0], [38.47, 24.53], [39.0, 24.75], [39.53, 24.53], [39.68, 24.18], [40.03, 24.03], [40.18, 23.68], [40.53, 23.53], [40.68, 23.18], [40.75, 23.15], [41.0, 23.25], [41.53, 23.03], [41.68, 22.68], [42.03, 22.53], [42.25, 22.0], [42.15, 21.75], [42.25, 21.5], [42.15, 21.25], [42.25, 21.0], [42.15, 20.75], [42.25, 20.5], [42.15, 20.25], [42.25, 20.0], [42.03, 19.47], [41.5, 19.25], [40.97, 19.47], [40.82, 19.82], [40.75, 19.85], [40.5, 19.75], [40.25, 19.85], [40.0, 19.75], [39.75, 19.85], [39.5, 19.75], [38.97, 19.97], [38.75, 20.5], [38.85, 20.75], [38.75, 21.0], [38.85, 21.25], [38.82, 21.32], [38.47, 21.47], [38.25, 22.0], [38.35, 22.25], [38.25, 22.5], [38.47, 23.03]]]]}, "2022-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.25, 22.5], [38.47, 23.03], [38.82, 23.18], [38.85, 23.25], [38.82, 23.32], [38.47, 23.47], [38.25, 24.0], [38.47, 24.53], [39.0, 24.75], [39.53, 24.53], [39.68, 24.18], [40.03, 24.03], [40.18, 23.68], [40.5, 23.54], [41.0, 23.75], [41.25, 23.65], [41.5, 23.75], [41.75, 23.65], [42.0, 23.75], [42.25, 23.65], [42.5, 23.75], [42.75, 23.65], [43.0, 23.75], [43.25, 23.65], [43.5, 23.75], [43.75, 23.65], [44.0, 23.75], [44.53, 23.53], [44.68, 23.18], [45.03, 23.03], [45.25, 22.5], [45.03, 21.97], [44.68, 21.82], [44.53, 21.47], [44.0, 21.25], [43.75, 21.35], [43.68, 21.32], [43.53, 20.97], [43.18, 20.82], [43.03, 20.47], [42.63, 20.3], [42.75, 20.0], [42.53, 19.47], [42.0, 19.25], [41.75, 19.35], [41.5, 19.25], [40.97, 19.47], [40.82, 19.82], [40.47, 19.97], [40.25, 20.5], [40.35, 20.75], [40.32, 20.82], [40.25, 20.85], [40.0, 20.75], [39.47, 20.97], [39.32, 21.32], [38.97, 21.47], [38.82, 21.82], [38.47, 21.97], [38.25, 22.5]]]]}, "2022-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.97, 23.03], [40.32, 23.18], [40.47, 23.53], [41.0, 23.75], [41.25, 23.65], [41.5, 23.75], [41.75, 23.65], [42.0, 23.75], [42.25, 23.65], [42.5, 23.75], [42.75, 23.65], [43.0, 23.75], [43.25, 23.65], [43.5, 23.75], [43.75, 23.65], [44.0, 23.75], [44.53, 23.53], [44.68, 23.18], [44.75, 23.15], [45.0, 23.25], [45.53, 23.03], [45.75, 22.5], [45.65, 22.25], [45.75, 22.0], [45.65, 21.75], [45.75, 21.5], [45.65, 21.25], [45.75, 21.0], [45.53, 20.47], [45.0, 20.25], [44.75, 20.35], [44.5, 20.25], [44.25, 20.35], [44.0, 20.25], [43.75, 20.35], [43.5, 20.25], [43.25, 20.35], [43.0, 20.25], [42.75, 20.35], [42.63, 20.3], [42.75, 20.0], [42.53, 19.47], [42.0, 19.25], [41.75, 19.35], [41.5, 19.25], [40.97, 19.47], [40.82, 19.82], [40.47, 19.97], [40.25, 20.5], [40.35, 20.75], [40.32, 20.82], [39.97, 20.97], [39.75, 21.5], [39.96, 22.0], [39.75, 22.5], [39.97, 23.03]]]]}, "2022-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.97, 23.03], [40.32, 23.18], [40.47, 23.53], [41.0, 23.75], [41.25, 23.65], [41.5, 23.75], [41.75, 23.65], [42.0, 23.75], [42.25, 23.65], [42.5, 23.75], [42.75, 23.65], [43.0, 23.75], [43.25, 23.65], [43.5, 23.75], [43.75, 23.65], [44.0, 23.75], [44.53, 23.53], [44.68, 23.18], [44.75, 23.15], [45.0, 23.25], [45.53, 23.03], [45.75, 22.5], [45.65, 22.25], [45.75, 22.0], [45.65, 21.75], [45.75, 21.5], [45.65, 21.25], [45.75, 21.0], [45.53, 20.47], [45.0, 20.25], [44.75, 20.35], [44.5, 20.25], [44.25, 20.35], [44.0, 20.25], [43.75, 20.35], [43.5, 20.25], [43.25, 20.35], [43.0, 20.25], [42.75, 20.35], [42.63, 20.3], [42.75, 20.0], [42.53, 19.47], [42.0, 19.25], [41.75, 19.35], [41.5, 19.25], [40.97, 19.47], [40.82, 19.82], [40.47, 19.97], [40.25, 20.5], [40.35, 20.75], [40.32, 20.82], [39.97, 20.97], [39.75, 21.5], [39.96, 22.0], [39.75, 22.5], [39.97, 23.03]]]]}, "2022-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.25, 21.5], [41.35, 21.75], [41.25, 22.0], [41.35, 22.25], [41.25, 22.5], [41.47, 23.03], [42.0, 23.25], [42.25, 23.15], [42.32, 23.18], [42.47, 23.53], [43.0, 23.75], [43.53, 23.53], [43.68, 23.18], [43.75, 23.15], [44.0, 23.25], [44.25, 23.15], [44.5, 23.25], [44.75, 23.15], [45.0, 23.25], [45.53, 23.03], [45.75, 22.5], [45.65, 22.25], [45.75, 22.0], [45.65, 21.75], [45.75, 21.5], [45.65, 21.25], [45.75, 21.0], [45.53, 20.47], [45.0, 20.25], [44.75, 20.35], [44.5, 20.25], [44.25, 20.35], [44.0, 20.25], [43.75, 20.35], [43.5, 20.25], [43.25, 20.35], [43.0, 20.25], [42.75, 20.35], [42.5, 20.25], [42.25, 20.35], [42.18, 20.32], [42.03, 19.97], [41.5, 19.75], [40.97, 19.97], [40.75, 20.5], [40.97, 21.03], [41.32, 21.18], [41.35, 21.25], [41.25, 21.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.915939605601352}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.407796218963124}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.640126120984917, 19.23195705348337, 17.812492168692017, 17.04965547339708, 13.983563984196337, 13.21895764675179, 10.383790093928894, 12.82256851039898]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.871853992017748, 14.444757617863957, 13.01902310858219, 12.893686773046511, 11.301174075350389, 11.048682005859803, 8.185690130642286, 11.318694208274621]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7683476753000633, -3.211438986810549, -3.5190895281197783, -3.572287673215421, -4.277344462525128, -3.965533688225644, -6.783537728390098, -4.112972274841104]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.544893078830853, -4.031745897193787, -4.425290015089786, -5.459370675733169, -5.771004064293777, -5.203941666918979, -8.915939605601352, -5.006812974585557]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.121773667375963, -1.8581517997021537, -1.9536343047334164, -1.9198491543292617, -1.8946943849177948, -1.660137909157346, -2.7959055477797765, -1.614618127826995]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5443215938849364, -2.1846784229455585, -2.4934970674210373, -3.034113972903315, -2.6573412916827426, -2.1410464925965034, -3.529528090931923, -1.9187134018893983]}}