{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:24.790669", "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": "2012-Sep-11_to_2012-Sep-13_102.5_37.5"}, "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": 2012090000519}, "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": "September 11 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 13 2012"}, "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": 68709.55725825831}, "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.Asia", "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": 37.5}, "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": 102.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "102.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 100.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 104.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 38.5], [99.97, 39.03], [100.5, 39.25], [100.75, 39.15], [101.0, 39.25], [101.25, 39.15], [101.5, 39.25], [102.03, 39.03], [102.18, 38.68], [102.25, 38.65], [102.5, 38.75], [103.0, 38.54], [103.5, 38.75], [103.75, 38.65], [104.0, 38.75], [104.25, 38.65], [104.5, 38.75], [105.03, 38.53], [105.25, 38.0], [105.15, 37.75], [105.25, 37.5], [105.03, 36.97], [104.5, 36.75], [104.25, 36.85], [104.18, 36.82], [104.15, 36.75], [104.18, 36.68], [104.53, 36.53], [104.75, 36.0], [104.53, 35.47], [104.0, 35.25], [103.47, 35.47], [103.32, 35.82], [103.25, 35.85], [103.0, 35.75], [102.75, 35.85], [102.5, 35.75], [102.25, 35.85], [102.0, 35.75], [101.47, 35.97], [101.32, 36.32], [100.97, 36.47], [100.82, 36.82], [100.47, 36.97], [100.25, 37.5], [100.35, 37.75], [100.32, 37.82], [99.97, 37.97], [99.75, 38.5]]]]}, "2012-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 38.5], [99.97, 39.03], [100.5, 39.25], [100.75, 39.15], [101.0, 39.25], [101.25, 39.15], [101.5, 39.25], [102.03, 39.03], [102.18, 38.68], [102.25, 38.65], [102.5, 38.75], [103.0, 38.54], [103.5, 38.75], [103.75, 38.65], [104.0, 38.75], [104.25, 38.65], [104.5, 38.75], [105.03, 38.53], [105.25, 38.0], [105.15, 37.75], [105.25, 37.5], [105.03, 36.97], [104.5, 36.75], [104.25, 36.85], [104.18, 36.82], [104.15, 36.75], [104.18, 36.68], [104.53, 36.53], [104.75, 36.0], [104.53, 35.47], [104.0, 35.25], [103.47, 35.47], [103.32, 35.82], [103.25, 35.85], [103.0, 35.75], [102.75, 35.85], [102.5, 35.75], [102.25, 35.85], [102.0, 35.75], [101.47, 35.97], [101.32, 36.32], [100.97, 36.47], [100.82, 36.82], [100.47, 36.97], [100.25, 37.5], [100.35, 37.75], [100.32, 37.82], [99.97, 37.97], [99.75, 38.5]]]]}, "2012-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 38.5], [99.97, 39.03], [100.5, 39.25], [100.75, 39.15], [101.0, 39.25], [101.25, 39.15], [101.5, 39.25], [102.03, 39.03], [102.18, 38.68], [102.25, 38.65], [102.5, 38.75], [103.0, 38.54], [103.5, 38.75], [103.75, 38.65], [104.0, 38.75], [104.25, 38.65], [104.5, 38.75], [105.03, 38.53], [105.25, 38.0], [105.15, 37.75], [105.25, 37.5], [105.03, 36.97], [104.5, 36.75], [104.25, 36.85], [104.18, 36.82], [104.15, 36.75], [104.18, 36.68], [104.53, 36.53], [104.75, 36.0], [104.53, 35.47], [104.0, 35.25], [103.47, 35.47], [103.32, 35.82], [103.25, 35.85], [103.0, 35.75], [102.75, 35.85], [102.5, 35.75], [102.25, 35.85], [102.0, 35.75], [101.47, 35.97], [101.32, 36.32], [100.97, 36.47], [100.82, 36.82], [100.47, 36.97], [100.25, 37.5], [100.35, 37.75], [100.32, 37.82], [99.97, 37.97], [99.75, 38.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.725906606520141}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.098523052162765}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.585070345494216, 4.335522385623392, 6.393505777067276]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.6709608989721687, -6.124827990746439, -4.335864950887867]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.41067181574265, -6.5615623961554315, -4.323334944590213]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.4522356679850645, -8.725906606520141, -6.734394810135541]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6070060362597614, -2.4292188519490465, -1.5869666862766447]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9762215021652787, -2.9856964318039982, -2.327438331993695]}}