{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:05.767263", "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": "2011-Dec-13_to_2011-Dec-19_102.5_48.5"}, "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": 2011120000775}, "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 13 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 19 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 65236.49712018082}, "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": ["Mongolia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia"]}, "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": 48.5}, "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": 99.25}, "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": 47.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 49.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.75, 49.5], [98.97, 50.03], [99.5, 50.25], [100.03, 50.03], [100.18, 49.68], [100.25, 49.65], [100.32, 49.68], [100.47, 50.03], [101.0, 50.25], [101.25, 50.15], [101.5, 50.25], [101.75, 50.15], [102.0, 50.25], [102.25, 50.15], [102.5, 50.25], [103.03, 50.03], [103.18, 49.68], [103.25, 49.65], [103.5, 49.75], [104.03, 49.53], [104.18, 49.18], [104.53, 49.03], [104.75, 48.5], [104.53, 47.97], [104.0, 47.75], [103.75, 47.85], [103.5, 47.75], [103.25, 47.85], [103.18, 47.82], [103.03, 47.47], [102.5, 47.25], [102.25, 47.35], [102.0, 47.25], [101.75, 47.35], [101.5, 47.25], [101.25, 47.35], [101.0, 47.25], [100.47, 47.47], [100.32, 47.82], [99.97, 47.97], [99.82, 48.32], [99.47, 48.47], [99.32, 48.82], [98.97, 48.97], [98.75, 49.5]]]]}, "2011-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.75, 49.5], [98.97, 50.03], [99.5, 50.25], [100.03, 50.03], [100.18, 49.68], [100.25, 49.65], [100.32, 49.68], [100.47, 50.03], [101.0, 50.25], [101.25, 50.15], [101.5, 50.25], [101.75, 50.15], [102.0, 50.25], [102.25, 50.15], [102.5, 50.25], [103.03, 50.03], [103.18, 49.68], [103.25, 49.65], [103.5, 49.75], [104.03, 49.53], [104.18, 49.18], [104.25, 49.15], [104.5, 49.25], [105.03, 49.03], [105.25, 48.5], [105.03, 47.97], [104.68, 47.82], [104.53, 47.47], [104.0, 47.25], [103.47, 47.47], [103.32, 47.82], [103.25, 47.85], [103.18, 47.82], [103.03, 47.47], [102.5, 47.25], [102.25, 47.35], [102.0, 47.25], [101.75, 47.35], [101.5, 47.25], [101.25, 47.35], [101.0, 47.25], [100.47, 47.47], [100.32, 47.82], [99.97, 47.97], [99.82, 48.32], [99.47, 48.47], [99.32, 48.82], [98.97, 48.97], [98.75, 49.5]]]]}, "2011-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.75, 49.5], [98.97, 50.03], [99.5, 50.25], [100.03, 50.03], [100.18, 49.68], [100.25, 49.65], [100.32, 49.68], [100.47, 50.03], [101.0, 50.25], [101.25, 50.15], [101.5, 50.25], [101.75, 50.15], [102.0, 50.25], [102.25, 50.15], [102.5, 50.25], [102.75, 50.15], [103.0, 50.25], [103.53, 50.03], [103.68, 49.68], [104.0, 49.54], [104.5, 49.75], [105.03, 49.53], [105.25, 49.0], [105.15, 48.75], [105.25, 48.5], [105.15, 48.25], [105.25, 48.0], [105.03, 47.47], [104.5, 47.25], [104.25, 47.35], [104.0, 47.25], [103.75, 47.35], [103.5, 47.25], [103.0, 47.46], [102.5, 47.25], [102.25, 47.35], [102.0, 47.25], [101.75, 47.35], [101.5, 47.25], [101.25, 47.35], [101.0, 47.25], [100.47, 47.47], [100.32, 47.82], [99.97, 47.97], [99.82, 48.32], [99.47, 48.47], [99.32, 48.82], [98.97, 48.97], [98.75, 49.5]]]]}, "2011-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.47, 50.03], [101.0, 50.25], [101.25, 50.15], [101.5, 50.25], [101.75, 50.15], [102.0, 50.25], [102.25, 50.15], [102.5, 50.25], [102.75, 50.15], [103.0, 50.25], [103.53, 50.03], [103.68, 49.68], [103.75, 49.65], [104.0, 49.75], [104.25, 49.65], [104.5, 49.75], [105.03, 49.53], [105.25, 49.0], [105.15, 48.75], [105.25, 48.5], [105.15, 48.25], [105.25, 48.0], [105.03, 47.47], [104.5, 47.25], [104.25, 47.35], [104.0, 47.25], [103.75, 47.35], [103.5, 47.25], [102.97, 47.47], [102.82, 47.82], [102.75, 47.85], [102.68, 47.82], [102.53, 47.47], [102.0, 47.25], [101.47, 47.47], [101.32, 47.82], [100.97, 47.97], [100.82, 48.32], [100.47, 48.47], [100.25, 49.0], [100.35, 49.25], [100.25, 49.5], [100.47, 50.03]]]]}, "2011-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.0, 50.25], [101.25, 50.15], [101.5, 50.25], [101.75, 50.15], [102.0, 50.25], [102.25, 50.15], [102.5, 50.25], [102.75, 50.15], [103.0, 50.25], [103.53, 50.03], [103.68, 49.68], [103.75, 49.65], [104.0, 49.75], [104.25, 49.65], [104.5, 49.75], [105.03, 49.53], [105.25, 49.0], [105.15, 48.75], [105.25, 48.5], [105.15, 48.25], [105.25, 48.0], [105.03, 47.47], [104.5, 47.25], [104.25, 47.35], [104.0, 47.25], [103.75, 47.35], [103.5, 47.25], [102.97, 47.47], [102.82, 47.82], [102.75, 47.85], [102.68, 47.82], [102.53, 47.47], [102.0, 47.25], [101.47, 47.47], [101.32, 47.82], [100.97, 47.97], [100.82, 48.32], [100.75, 48.35], [100.5, 48.25], [99.97, 48.47], [99.75, 49.0], [99.97, 49.53], [100.32, 49.68], [100.47, 50.03], [101.0, 50.25]]]]}, "2011-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.0, 50.25], [101.25, 50.15], [101.5, 50.25], [101.75, 50.15], [102.0, 50.25], [102.25, 50.15], [102.5, 50.25], [102.75, 50.15], [103.0, 50.25], [103.53, 50.03], [103.68, 49.68], [103.75, 49.65], [104.0, 49.75], [104.25, 49.65], [104.5, 49.75], [105.03, 49.53], [105.25, 49.0], [105.15, 48.75], [105.25, 48.5], [105.15, 48.25], [105.25, 48.0], [105.03, 47.47], [104.5, 47.25], [104.25, 47.35], [104.0, 47.25], [103.75, 47.35], [103.5, 47.25], [102.97, 47.47], [102.82, 47.82], [102.75, 47.85], [102.68, 47.82], [102.53, 47.47], [102.0, 47.25], [101.47, 47.47], [101.32, 47.82], [100.97, 47.97], [100.82, 48.32], [100.75, 48.35], [100.5, 48.25], [99.97, 48.47], [99.75, 49.0], [99.97, 49.53], [100.32, 49.68], [100.47, 50.03], [101.0, 50.25]]]]}, "2011-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.97, 48.47], [99.75, 49.0], [99.97, 49.53], [100.5, 49.75], [100.75, 49.65], [101.0, 49.75], [101.53, 49.53], [101.68, 49.18], [101.75, 49.15], [101.82, 49.18], [101.97, 49.53], [102.5, 49.75], [103.03, 49.53], [103.18, 49.18], [103.25, 49.15], [103.5, 49.25], [103.75, 49.15], [104.0, 49.25], [104.25, 49.15], [104.5, 49.25], [105.03, 49.03], [105.25, 48.5], [105.03, 47.97], [104.68, 47.82], [104.53, 47.47], [104.0, 47.25], [103.47, 47.47], [103.32, 47.82], [103.25, 47.85], [103.0, 47.75], [102.75, 47.85], [102.68, 47.82], [102.53, 47.47], [102.0, 47.25], [101.47, 47.47], [101.32, 47.82], [100.97, 47.97], [100.82, 48.32], [100.75, 48.35], [100.5, 48.25], [99.97, 48.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.576597152388729}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.249146466316931}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-26.026634244639155, -26.49628467903767, -26.649299973801078, -25.540406446037565, -26.367832182280694, -26.68403157482595, -24.687703555682333]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-28.754357870045425, -28.996226808372995, -30.444525518564774, -28.270550590538647, -29.28528968588634, -28.687384118112533, -26.781443003521503]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.153699005623425, -9.539141658639373, -9.47020967793376, -8.489830742905447, -9.41909457034853, -9.765203776350832, -8.30166131265497]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.04719406431687, -12.37679640587956, -13.576597152388729, -10.702816800465882, -12.623868773922794, -12.069348419951751, -9.924225344332712]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.819513352856195, -1.837561963366568, -1.803413849010948, -1.6350211490267461, -1.9136554318168186, -2.048892005206951, -1.7834019439507456]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2190938295251996, -2.408657426623773, -2.4167827649382603, -1.9677450775507161, -2.3501656378361626, -2.559134166982509, -2.1141569620018092]}}