{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:45.636366", "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-13_to_2026-Mar-15_105.0_35.5"}, "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": 2026030000418}, "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 13 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 15 2026"}, "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": 57733.709019017675}, "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": []}, "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": 35.5}, "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": 105.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "105.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 103.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 106.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[103.97, 37.03], [104.5, 37.25], [104.75, 37.15], [105.0, 37.25], [105.25, 37.15], [105.32, 37.18], [105.47, 37.53], [106.0, 37.75], [106.53, 37.53], [106.68, 37.18], [107.03, 37.03], [107.25, 36.5], [107.03, 35.97], [106.68, 35.82], [106.65, 35.75], [106.75, 35.5], [106.54, 35.0], [106.75, 34.5], [106.53, 33.97], [106.0, 33.75], [105.75, 33.85], [105.5, 33.75], [105.25, 33.85], [105.0, 33.75], [104.47, 33.97], [104.32, 34.32], [103.97, 34.47], [103.82, 34.82], [103.75, 34.85], [103.5, 34.75], [102.97, 34.97], [102.75, 35.5], [102.97, 36.03], [103.32, 36.18], [103.47, 36.53], [103.82, 36.68], [103.97, 37.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.47, 36.53], [103.82, 36.68], [103.97, 37.03], [104.5, 37.25], [104.75, 37.15], [105.0, 37.25], [105.25, 37.15], [105.32, 37.18], [105.47, 37.53], [106.0, 37.75], [106.53, 37.53], [106.68, 37.18], [107.03, 37.03], [107.25, 36.5], [107.03, 35.97], [106.68, 35.82], [106.65, 35.75], [106.75, 35.5], [106.54, 35.0], [106.75, 34.5], [106.53, 33.97], [106.0, 33.75], [105.75, 33.85], [105.5, 33.75], [105.25, 33.85], [105.0, 33.75], [104.47, 33.97], [104.32, 34.32], [103.97, 34.47], [103.82, 34.82], [103.75, 34.85], [103.5, 34.75], [102.97, 34.97], [102.75, 35.5], [102.97, 36.03], [103.32, 36.18], [103.47, 36.53]]]]}, "2026-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.47, 36.53], [103.82, 36.68], [103.97, 37.03], [104.5, 37.25], [104.75, 37.15], [105.0, 37.25], [105.25, 37.15], [105.32, 37.18], [105.47, 37.53], [106.0, 37.75], [106.53, 37.53], [106.68, 37.18], [107.03, 37.03], [107.25, 36.5], [107.03, 35.97], [106.68, 35.82], [106.65, 35.75], [106.75, 35.5], [106.54, 35.0], [106.75, 34.5], [106.53, 33.97], [106.0, 33.75], [105.75, 33.85], [105.5, 33.75], [105.25, 33.85], [105.0, 33.75], [104.47, 33.97], [104.32, 34.32], [103.97, 34.47], [103.82, 34.82], [103.75, 34.85], [103.5, 34.75], [102.97, 34.97], [102.75, 35.5], [102.97, 36.03], [103.32, 36.18], [103.47, 36.53]]]]}, "2026-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.47, 36.53], [103.82, 36.68], [103.97, 37.03], [104.5, 37.25], [104.75, 37.15], [105.0, 37.25], [105.25, 37.15], [105.32, 37.18], [105.47, 37.53], [106.0, 37.75], [106.53, 37.53], [106.68, 37.18], [107.03, 37.03], [107.25, 36.5], [107.03, 35.97], [106.68, 35.82], [106.65, 35.75], [106.75, 35.5], [106.54, 35.0], [106.75, 34.5], [106.53, 33.97], [106.0, 33.75], [105.75, 33.85], [105.5, 33.75], [105.25, 33.85], [105.0, 33.75], [104.47, 33.97], [104.32, 34.32], [103.97, 34.47], [103.82, 34.82], [103.75, 34.85], [103.5, 34.75], [102.97, 34.97], [102.75, 35.5], [102.97, 36.03], [103.32, 36.18], [103.47, 36.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.625061669166769}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.7353557187303466}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.954612201193072, -6.152167411472419, -3.9474831954292426]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.567889912923135, -8.303559366861975, -6.724522654215491]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.127044778192044, -9.510101824953916, -7.568920553045082]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.895947924149937, -10.625061669166769, -9.527363454994997]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6213427766090178, -2.539847281243124, -1.9691457493665159]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0287268982113598, -3.0569082549550455, -2.5033116193286187]}}