{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:57.207993", "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": "2026-Mar-10_to_2026-Mar-14_74.0_43.0"}, "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": 2026030000315}, "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": "March 10 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 14 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 61871.525297966014}, "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", "Kazakhstan", "Kyrgyzstan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "W.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": 43.0}, "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": 74.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "74.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 72.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 78.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.0, 44.25], [74.25, 44.15], [74.5, 44.25], [75.03, 44.03], [75.25, 43.5], [75.15, 43.25], [75.25, 43.0], [75.03, 42.47], [74.5, 42.25], [74.25, 42.35], [74.0, 42.25], [73.75, 42.35], [73.5, 42.25], [72.97, 42.47], [72.75, 43.0], [72.97, 43.53], [73.32, 43.68], [73.47, 44.03], [74.0, 44.25]]]]}, "2026-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.96, 42.5], [72.75, 43.0], [72.97, 43.53], [73.32, 43.68], [73.47, 44.03], [74.0, 44.25], [74.25, 44.15], [74.5, 44.25], [75.03, 44.03], [75.25, 43.5], [75.15, 43.25], [75.18, 43.18], [75.25, 43.15], [75.32, 43.18], [75.47, 43.53], [75.82, 43.68], [75.97, 44.03], [76.5, 44.25], [77.03, 44.03], [77.25, 43.5], [77.15, 43.25], [77.25, 43.0], [77.03, 42.47], [76.63, 42.3], [76.75, 42.0], [76.53, 41.47], [76.0, 41.25], [75.7, 41.38], [75.53, 40.97], [75.18, 40.82], [75.03, 40.47], [74.5, 40.25], [74.0, 40.46], [73.5, 40.25], [73.25, 40.35], [73.0, 40.25], [72.47, 40.47], [72.25, 41.0], [72.47, 41.53], [72.88, 41.7], [72.75, 42.0], [72.96, 42.5]]]]}, 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42.53]]]]}, "2026-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.0, 42.75], [74.25, 42.65], [74.5, 42.75], [74.75, 42.65], [75.0, 42.75], [75.53, 42.53], [75.75, 42.0], [75.53, 41.47], [75.18, 41.32], [75.15, 41.25], [75.25, 41.0], [75.03, 40.47], [74.5, 40.25], [73.97, 40.47], [73.82, 40.82], [73.47, 40.97], [73.25, 41.5], [73.35, 41.75], [73.25, 42.0], [73.47, 42.53], [74.0, 42.75]]], [[[75.97, 42.03], [76.5, 42.25], [76.75, 42.15], [77.0, 42.25], [77.25, 42.15], [77.32, 42.18], [77.47, 42.53], [78.0, 42.75], [78.53, 42.53], [78.75, 42.0], [78.53, 41.47], [78.18, 41.32], [78.03, 40.97], [77.68, 40.82], [77.53, 40.47], [77.0, 40.25], [76.47, 40.47], [76.32, 40.82], [75.97, 40.97], [75.75, 41.5], [75.97, 42.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.178593829048452}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.511636478407671}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.815396626790289, -10.787509381329585, -11.842407113534364, -10.691510290569738, -14.19290939099858]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.095767720540323, -15.395347340901651, -23.585464223225898, -19.637307866414375, -21.122564061482734]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.485219755041169, -9.574980489305378, -8.101984940983394, -6.166544418201213, -6.087517603506215]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.747105453370239, -15.178593829048452, -12.19761220064828, -7.514227861613705, -7.840496364731081]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3336551593752806, -2.2366687656137887, -2.0626670860729237, -1.6300210973953517, -1.725106385644005]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4039546837358512, -2.957454536422013, -2.835335702656687, -2.061460636180781, -2.074073061292208]}}