{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:40.856972", "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-Mar-16_to_2022-Mar-21_115.5_41.0"}, "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": 2022030000560}, "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 16 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 21 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 383629.499870396}, "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"]}, "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": ["Bohai 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": 41.0}, "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": 115.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 124.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.35, 38.75], [113.25, 39.0], [113.35, 39.25], [113.25, 39.5], [113.47, 40.03], [113.82, 40.18], [113.85, 40.25], [113.75, 40.5], [113.85, 40.75], [113.75, 41.0], [113.97, 41.53], [114.5, 41.75], [114.75, 41.65], [115.0, 41.75], [115.25, 41.65], [115.32, 41.68], [115.47, 42.03], [116.0, 42.25], [116.53, 42.03], [116.68, 41.68], [116.75, 41.65], [116.82, 41.68], [116.97, 42.03], [117.5, 42.25], [117.75, 42.15], [118.0, 42.25], [118.25, 42.15], [118.32, 42.18], [118.47, 42.53], [118.82, 42.68], [118.85, 42.75], [118.75, 43.0], [118.97, 43.53], [119.32, 43.68], [119.47, 44.03], [119.82, 44.18], [119.85, 44.25], [119.75, 44.5], [119.97, 45.03], [120.5, 45.25], [120.75, 45.15], [120.82, 45.18], [120.97, 45.53], [121.5, 45.75], [121.75, 45.65], [122.0, 45.75], [122.25, 45.65], [122.5, 45.75], [122.75, 45.65], [123.0, 45.75], [123.53, 45.53], [123.68, 45.18], [124.03, 45.03], [124.25, 44.5], [124.15, 44.25], [124.18, 44.18], [124.25, 44.15], [124.5, 44.25], [125.03, 44.03], [125.25, 43.5], [125.03, 42.97], [124.68, 42.82], [124.53, 42.47], [124.18, 42.32], [124.03, 41.97], [123.5, 41.75], [123.0, 41.96], [122.5, 41.75], [122.25, 41.85], [122.0, 41.75], [121.57, 41.93], [121.75, 41.5], [121.53, 40.97], [121.18, 40.82], [121.03, 40.47], [120.68, 40.32], [120.65, 40.25], [120.75, 40.0], [120.53, 39.47], [120.18, 39.32], [120.15, 39.25], [120.18, 39.18], [120.53, 39.03], [120.75, 38.5], [120.53, 37.97], [120.0, 37.75], [119.75, 37.85], [119.68, 37.82], [119.53, 37.47], [119.18, 37.32], [119.03, 36.97], [118.68, 36.82], [118.53, 36.47], [118.0, 36.25], [117.75, 36.35], [117.5, 36.25], [117.25, 36.35], [117.18, 36.32], [117.03, 35.97], [116.5, 35.75], [116.25, 35.85], [116.0, 35.75], [115.75, 35.85], [115.5, 35.75], [115.25, 35.85], [115.18, 35.82], [115.03, 35.47], [114.5, 35.25], [113.97, 35.47], [113.82, 35.82], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0], [113.35, 37.25], [113.25, 37.5], [113.35, 37.75], [113.25, 38.0]], [[120.32, 41.68], [120.37, 41.8], [120.25, 41.85], [120.18, 41.82], [120.15, 41.75], [120.18, 41.68], [120.25, 41.65], [120.32, 41.68]], [[121.43, 42.07], [121.32, 42.32], [121.25, 42.35], [121.18, 42.32], [121.13, 42.2], [121.35, 42.11], [121.43, 42.07]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.47, 41.47], [118.25, 42.0], [118.47, 42.53], [118.82, 42.68], [118.85, 42.75], [118.75, 43.0], [118.97, 43.53], [119.32, 43.68], [119.47, 44.03], [119.82, 44.18], [119.85, 44.25], [119.75, 44.5], [119.97, 45.03], [120.5, 45.25], [120.75, 45.15], [120.82, 45.18], [120.97, 45.53], [121.5, 45.75], [121.75, 45.65], [122.0, 45.75], [122.25, 45.65], [122.5, 45.75], [122.75, 45.65], [123.0, 45.75], [123.53, 45.53], [123.68, 45.18], [124.03, 45.03], [124.25, 44.5], [124.15, 44.25], [124.18, 44.18], [124.25, 44.15], [124.5, 44.25], [125.03, 44.03], [125.25, 43.5], [125.03, 42.97], [124.68, 42.82], [124.53, 42.47], [124.18, 42.32], [124.03, 41.97], [123.5, 41.75], [123.0, 41.96], [122.5, 41.75], [122.25, 41.85], [122.0, 41.75], [121.47, 41.97], [121.32, 42.32], [121.25, 42.35], [121.18, 42.32], [121.03, 41.97], [120.5, 41.75], [120.25, 41.85], [120.18, 41.82], [120.15, 41.75], [120.25, 41.5], [120.03, 40.97], [119.5, 40.75], [118.97, 40.97], [118.82, 41.32], [118.47, 41.47]]]]}, "2022-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 37.0], [113.35, 37.25], [113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.35, 38.75], [113.25, 39.0], [113.35, 39.25], [113.25, 39.5], [113.47, 40.03], [113.82, 40.18], [113.85, 40.25], [113.75, 40.5], [113.85, 40.75], [113.75, 41.0], [113.97, 41.53], [114.5, 41.75], [114.75, 41.65], [115.0, 41.75], [115.25, 41.65], [115.5, 41.75], [115.75, 41.65], [116.0, 41.75], [116.25, 41.65], [116.5, 41.75], [116.75, 41.65], [116.82, 41.68], [116.97, 42.03], [117.5, 42.25], [117.75, 42.15], [118.0, 42.25], [118.25, 42.15], [118.32, 42.18], [118.47, 42.53], [118.82, 42.68], [118.85, 42.75], [118.75, 43.0], [118.97, 43.53], [119.32, 43.68], [119.47, 44.03], [119.82, 44.18], [119.85, 44.25], [119.75, 44.5], [119.97, 45.03], [120.5, 45.25], [120.75, 45.15], [120.82, 45.18], [120.97, 45.53], [121.5, 45.75], [121.75, 45.65], [122.0, 45.75], [122.25, 45.65], [122.5, 45.75], [122.75, 45.65], [123.0, 45.75], [123.53, 45.53], [123.68, 45.18], [124.03, 45.03], [124.25, 44.5], [124.15, 44.25], [124.18, 44.18], [124.25, 44.15], [124.5, 44.25], [125.03, 44.03], [125.25, 43.5], [125.03, 42.97], [124.68, 42.82], [124.53, 42.47], [124.18, 42.32], [124.03, 41.97], [123.5, 41.75], [123.0, 41.96], [122.5, 41.75], [122.25, 41.85], [122.0, 41.75], [121.57, 41.93], [121.75, 41.5], [121.53, 40.97], [121.18, 40.82], [121.03, 40.47], [120.68, 40.32], [120.65, 40.25], [120.75, 40.0], [120.53, 39.47], [120.18, 39.32], [120.15, 39.25], [120.18, 39.18], [120.53, 39.03], [120.75, 38.5], [120.53, 37.97], [120.0, 37.75], [119.75, 37.85], [119.68, 37.82], [119.53, 37.47], [119.18, 37.32], [119.03, 36.97], [118.68, 36.82], [118.53, 36.47], [118.0, 36.25], [117.75, 36.35], [117.5, 36.25], [117.25, 36.35], [117.18, 36.32], [117.03, 35.97], [116.5, 35.75], [116.25, 35.85], [116.0, 35.75], [115.75, 35.85], [115.5, 35.75], [115.25, 35.85], [115.18, 35.82], [115.03, 35.47], [114.5, 35.25], [113.97, 35.47], [113.82, 35.82], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0]], [[120.25, 41.65], [120.32, 41.68], [120.38, 41.8], [120.25, 41.85], [120.18, 41.82], [120.15, 41.75], [120.18, 41.68], [120.25, 41.65]], [[121.43, 42.07], [121.32, 42.32], [121.25, 42.35], [121.18, 42.32], [121.13, 42.2], [121.43, 42.07]]]]}, "2022-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 37.0], [113.35, 37.25], [113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.35, 38.75], [113.25, 39.0], [113.35, 39.25], [113.25, 39.5], [113.47, 40.03], [113.82, 40.18], [113.85, 40.25], [113.75, 40.5], [113.85, 40.75], [113.75, 41.0], [113.97, 41.53], [114.5, 41.75], [114.75, 41.65], [115.0, 41.75], [115.25, 41.65], [115.5, 41.75], [115.75, 41.65], [116.0, 41.75], [116.25, 41.65], [116.5, 41.75], [116.75, 41.65], [116.82, 41.68], [116.97, 42.03], [117.5, 42.25], [117.75, 42.15], [118.0, 42.25], [118.25, 42.15], [118.32, 42.18], [118.47, 42.53], [118.82, 42.68], [118.85, 42.75], [118.75, 43.0], [118.97, 43.53], [119.32, 43.68], [119.47, 44.03], [119.82, 44.18], [119.85, 44.25], [119.75, 44.5], [119.97, 45.03], [120.5, 45.25], [120.75, 45.15], [120.82, 45.18], [120.97, 45.53], [121.5, 45.75], [121.75, 45.65], [122.0, 45.75], [122.25, 45.65], [122.5, 45.75], [122.75, 45.65], [123.0, 45.75], [123.53, 45.53], [123.68, 45.18], [124.03, 45.03], [124.25, 44.5], [124.15, 44.25], [124.18, 44.18], [124.25, 44.15], [124.5, 44.25], [125.03, 44.03], [125.25, 43.5], [125.03, 42.97], [124.68, 42.82], [124.53, 42.47], [124.18, 42.32], [124.03, 41.97], [123.5, 41.75], [123.0, 41.96], [122.5, 41.75], [122.25, 41.85], [122.0, 41.75], [121.57, 41.93], [121.75, 41.5], [121.53, 40.97], [121.18, 40.82], [121.03, 40.47], [120.68, 40.32], [120.65, 40.25], [120.75, 40.0], [120.53, 39.47], [120.18, 39.32], [120.15, 39.25], [120.18, 39.18], [120.53, 39.03], [120.75, 38.5], [120.53, 37.97], [120.0, 37.75], [119.75, 37.85], [119.68, 37.82], [119.53, 37.47], [119.18, 37.32], [119.03, 36.97], [118.68, 36.82], [118.53, 36.47], [118.0, 36.25], [117.75, 36.35], [117.5, 36.25], [117.25, 36.35], [117.18, 36.32], [117.03, 35.97], [116.5, 35.75], [116.25, 35.85], [116.0, 35.75], [115.75, 35.85], [115.5, 35.75], [115.25, 35.85], [115.18, 35.82], [115.03, 35.47], [114.5, 35.25], [113.97, 35.47], [113.82, 35.82], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0]], [[120.25, 41.65], [120.32, 41.68], [120.38, 41.8], [120.25, 41.85], [120.18, 41.82], [120.15, 41.75], [120.18, 41.68], [120.25, 41.65]], [[121.43, 42.07], [121.32, 42.32], [121.25, 42.35], [121.18, 42.32], [121.13, 42.2], [121.43, 42.07]]]]}, "2022-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.35, 37.25], [113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.35, 38.75], [113.25, 39.0], [113.35, 39.25], [113.25, 39.5], [113.47, 40.03], [113.82, 40.18], [113.85, 40.25], [113.75, 40.5], [113.85, 40.75], [113.75, 41.0], [113.97, 41.53], [114.5, 41.75], [114.75, 41.65], [115.0, 41.75], [115.25, 41.65], [115.32, 41.68], [115.47, 42.03], [116.0, 42.25], [116.53, 42.03], [116.68, 41.68], [116.75, 41.65], [116.82, 41.68], [116.97, 42.03], [117.5, 42.25], [117.75, 42.15], [118.0, 42.25], [118.25, 42.15], [118.5, 42.25], [118.75, 42.15], [119.0, 42.25], [119.53, 42.03], [119.68, 41.68], [119.75, 41.65], [120.0, 41.75], [120.25, 41.65], [120.32, 41.68], [120.47, 42.03], [121.0, 42.25], [121.53, 42.03], [121.75, 41.5], [121.53, 40.97], [121.18, 40.82], [121.03, 40.47], [120.68, 40.32], [120.65, 40.25], [120.75, 40.0], [120.53, 39.47], [120.18, 39.32], [120.15, 39.25], [120.18, 39.18], [120.53, 39.03], [120.75, 38.5], [120.53, 37.97], [120.0, 37.75], [119.75, 37.85], [119.68, 37.82], [119.53, 37.47], [119.18, 37.32], [119.03, 36.97], [118.68, 36.82], [118.53, 36.47], [118.0, 36.25], [117.75, 36.35], [117.5, 36.25], [117.25, 36.35], [117.18, 36.32], [117.03, 35.97], [116.5, 35.75], [116.25, 35.85], [116.0, 35.75], [115.75, 35.85], [115.5, 35.75], [115.25, 35.85], [115.18, 35.82], [115.03, 35.47], [114.5, 35.25], [113.97, 35.47], [113.82, 35.82], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0], [113.35, 37.25]]], [[[124.0, 44.25], [124.53, 44.03], [124.75, 43.5], [124.65, 43.25], [124.75, 43.0], [124.53, 42.47], [124.0, 42.25], [123.75, 42.35], [123.5, 42.25], [122.97, 42.47], [122.75, 43.0], [122.97, 43.53], [123.32, 43.68], [123.47, 44.03], [124.0, 44.25]]]]}, "2022-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.47, 42.03], [116.0, 42.25], [116.53, 42.03], [116.75, 41.5], [116.53, 40.97], [116.18, 40.82], [116.07, 40.57], [116.5, 40.75], [117.03, 40.53], [117.25, 40.0], [117.03, 39.47], [116.5, 39.25], [115.97, 39.47], [115.75, 40.0], [115.93, 40.43], [115.5, 40.25], [114.97, 40.47], [114.75, 41.0], [114.97, 41.53], [115.32, 41.68], [115.47, 42.03]]]]}, "2022-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.47, 42.03], [116.0, 42.25], [116.53, 42.03], [116.75, 41.5], [116.53, 40.97], [116.18, 40.82], [116.03, 40.47], [115.5, 40.25], [114.97, 40.47], [114.75, 41.0], [114.97, 41.53], [115.32, 41.68], [115.47, 42.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.35747048250363}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.640676878484379}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-5.487834699833911, -1.9278702322399113, -2.2707065007929828, -0.20904743324899755, -4.40476756518143, -8.124329021595656]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.884984595565584, -8.129407948407959, -9.084175648471728, -10.775035033069457, -8.690840983118562, -8.794394657569569]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.265777302252493, -6.567483841598114, -7.06282217335866, -6.325636733725334, -6.073352360935871, -6.781559412390976]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.982570014892872, -8.638495594352378, -10.35747048250363, -9.859680713688078, -7.369221723518081, -6.832086769904038]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5011987362623849, -1.7419873329285458, -1.8345149326951515, -1.6959130094785382, -1.4607978016666472, -1.5522990171300652]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6190093936400711, -2.496201667687458, -3.0149716709759757, -2.241030500845187, -1.7261374445232485, -1.6198600361971216]}}