{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:13:10.836167", "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": "2018-Jul-14_to_2018-Jul-17_101.0_61.5"}, "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": 2018070000671}, "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": "July 14 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 17 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 181751.41540032846}, "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": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "Russian-Arctic"]}, "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": 61.5}, "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": 101.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "101.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 99.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 108.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 66.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-07-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.47, 62.53], [99.82, 62.68], [99.85, 62.75], [99.75, 63.0], [99.85, 63.25], [99.75, 63.5], [99.97, 64.03], [100.32, 64.18], [100.35, 64.25], [100.25, 64.5], [100.47, 65.03], [100.82, 65.18], [100.97, 65.53], [101.5, 65.75], [101.75, 65.65], [102.0, 65.75], [102.25, 65.65], [102.32, 65.68], [102.47, 66.03], [103.0, 66.25], [103.25, 66.15], [103.5, 66.25], [103.75, 66.15], [104.0, 66.25], [104.25, 66.15], [104.32, 66.18], [104.47, 66.53], [105.0, 66.75], [105.25, 66.65], [105.5, 66.75], [105.75, 66.65], [106.0, 66.75], [106.25, 66.65], [106.5, 66.75], [106.75, 66.65], [106.82, 66.68], [106.97, 67.03], [107.5, 67.25], [107.75, 67.15], [108.0, 67.25], [108.25, 67.15], [108.5, 67.25], [109.03, 67.03], [109.25, 66.5], [109.03, 65.97], [108.68, 65.82], [108.53, 65.47], [108.0, 65.25], [107.75, 65.35], [107.68, 65.32], [107.53, 64.97], [107.0, 64.75], [106.75, 64.85], [106.5, 64.75], [106.25, 64.85], [106.18, 64.82], [106.03, 64.47], [105.5, 64.25], [105.25, 64.35], [105.18, 64.32], [105.03, 63.97], [104.5, 63.75], [104.25, 63.85], [104.0, 63.75], [103.75, 63.85], [103.68, 63.82], [103.65, 63.75], [103.75, 63.5], [103.53, 62.97], [103.18, 62.82], [103.15, 62.75], [103.25, 62.5], [103.03, 61.97], [102.68, 61.82], [102.53, 61.47], [102.0, 61.25], [101.75, 61.35], [101.68, 61.32], [101.53, 60.97], [101.0, 60.75], [100.75, 60.85], [100.5, 60.75], [100.25, 60.85], [100.0, 60.75], [99.47, 60.97], [99.25, 61.5], [99.35, 61.75], [99.25, 62.0], [99.47, 62.53]]]]}, "2018-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.47, 62.53], [99.82, 62.68], [99.85, 62.75], [99.75, 63.0], [99.85, 63.25], [99.75, 63.5], [99.97, 64.03], [100.32, 64.18], [100.35, 64.25], [100.25, 64.5], [100.47, 65.03], [100.82, 65.18], [100.97, 65.53], [101.5, 65.75], [101.75, 65.65], [102.0, 65.75], [102.25, 65.65], [102.32, 65.68], [102.47, 66.03], [103.0, 66.25], [103.25, 66.15], [103.5, 66.25], [103.75, 66.15], [104.0, 66.25], [104.25, 66.15], [104.32, 66.18], [104.47, 66.53], [105.0, 66.75], [105.25, 66.65], [105.5, 66.75], [105.75, 66.65], [106.0, 66.75], [106.25, 66.65], [106.5, 66.75], [106.75, 66.65], [106.82, 66.68], [106.97, 67.03], [107.5, 67.25], [107.75, 67.15], [108.0, 67.25], [108.25, 67.15], [108.5, 67.25], [109.03, 67.03], [109.25, 66.5], [109.03, 65.97], [108.68, 65.82], [108.53, 65.47], [108.0, 65.25], [107.75, 65.35], [107.68, 65.32], [107.53, 64.97], [107.0, 64.75], [106.75, 64.85], [106.5, 64.75], [106.25, 64.85], [106.18, 64.82], [106.03, 64.47], [105.5, 64.25], [105.25, 64.35], [105.18, 64.32], [105.03, 63.97], [104.5, 63.75], [104.25, 63.85], [104.0, 63.75], [103.75, 63.85], [103.68, 63.82], [103.65, 63.75], [103.75, 63.5], [103.53, 62.97], [103.18, 62.82], [103.15, 62.75], [103.25, 62.5], [103.13, 62.2], [103.25, 62.15], [103.32, 62.18], [103.47, 62.53], [104.0, 62.75], [104.25, 62.65], [104.5, 62.75], [104.75, 62.65], [105.0, 62.75], [105.25, 62.65], [105.5, 62.75], [106.03, 62.53], [106.18, 62.18], [106.25, 62.15], [106.5, 62.25], [107.03, 62.03], [107.25, 61.5], [107.15, 61.25], [107.25, 61.0], [107.03, 60.47], [106.5, 60.25], [106.25, 60.35], [106.18, 60.32], [106.03, 59.97], [105.68, 59.82], [105.53, 59.47], [105.18, 59.32], [105.03, 58.97], [104.5, 58.75], [104.25, 58.85], [104.18, 58.82], [104.03, 58.47], [103.5, 58.25], [103.25, 58.35], [103.0, 58.25], [102.75, 58.35], [102.5, 58.25], [102.25, 58.35], [102.18, 58.32], [102.03, 57.97], [101.5, 57.75], [101.25, 57.85], [101.0, 57.75], [100.75, 57.85], [100.5, 57.75], [99.97, 57.97], [99.75, 58.5], [99.97, 59.03], [100.32, 59.18], [100.46, 59.5], [100.25, 60.0], [100.35, 60.25], [100.32, 60.32], [99.97, 60.47], [99.82, 60.82], [99.47, 60.97], [99.25, 61.5], [99.35, 61.75], [99.25, 62.0], [99.47, 62.53]]]]}, "2018-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.47, 62.53], [99.82, 62.68], [99.85, 62.75], [99.75, 63.0], [99.85, 63.25], [99.75, 63.5], [99.97, 64.03], [100.32, 64.18], [100.35, 64.25], [100.25, 64.5], [100.47, 65.03], [100.82, 65.18], [100.97, 65.53], [101.5, 65.75], [101.75, 65.65], [102.0, 65.75], [102.25, 65.65], [102.32, 65.68], [102.47, 66.03], [103.0, 66.25], [103.25, 66.15], [103.5, 66.25], [103.75, 66.15], [104.0, 66.25], [104.25, 66.15], [104.32, 66.18], [104.47, 66.53], [105.0, 66.75], [105.25, 66.65], [105.5, 66.75], [105.75, 66.65], [106.0, 66.75], [106.25, 66.65], [106.5, 66.75], [106.75, 66.65], [106.82, 66.68], [106.97, 67.03], [107.5, 67.25], [107.75, 67.15], [108.0, 67.25], [108.25, 67.15], [108.5, 67.25], [109.03, 67.03], [109.25, 66.5], [109.03, 65.97], [108.68, 65.82], [108.53, 65.47], [108.0, 65.25], [107.75, 65.35], [107.68, 65.32], [107.53, 64.97], [107.0, 64.75], [106.75, 64.85], [106.5, 64.75], [106.25, 64.85], [106.18, 64.82], [106.03, 64.47], [105.5, 64.25], [105.25, 64.35], [105.18, 64.32], [105.03, 63.97], [104.5, 63.75], [104.25, 63.85], [104.0, 63.75], [103.75, 63.85], [103.68, 63.82], [103.65, 63.75], [103.75, 63.5], [103.53, 62.97], [103.18, 62.82], [103.15, 62.75], [103.25, 62.5], [103.13, 62.2], [103.25, 62.15], [103.32, 62.18], [103.47, 62.53], [104.0, 62.75], [104.25, 62.65], [104.5, 62.75], [104.75, 62.65], [105.0, 62.75], [105.25, 62.65], [105.5, 62.75], [106.03, 62.53], [106.18, 62.18], [106.25, 62.15], [106.5, 62.25], [107.03, 62.03], [107.25, 61.5], [107.15, 61.25], [107.25, 61.0], [107.03, 60.47], [106.5, 60.25], [106.25, 60.35], [106.18, 60.32], [106.03, 59.97], [105.68, 59.82], [105.53, 59.47], [105.18, 59.32], [105.03, 58.97], [104.5, 58.75], [104.25, 58.85], [104.18, 58.82], [104.03, 58.47], [103.5, 58.25], [103.25, 58.35], [103.0, 58.25], [102.75, 58.35], [102.5, 58.25], [102.25, 58.35], [102.18, 58.32], [102.03, 57.97], [101.5, 57.75], [101.25, 57.85], [101.0, 57.75], [100.75, 57.85], [100.5, 57.75], [99.97, 57.97], [99.75, 58.5], [99.97, 59.03], [100.32, 59.18], [100.46, 59.5], [100.25, 60.0], [100.35, 60.25], [100.32, 60.32], [99.97, 60.47], [99.82, 60.82], [99.47, 60.97], [99.25, 61.5], [99.35, 61.75], [99.25, 62.0], [99.47, 62.53]]]]}, "2018-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.97, 62.03], [100.5, 62.25], [100.75, 62.15], [101.0, 62.25], [101.25, 62.15], [101.5, 62.25], [101.75, 62.15], [102.0, 62.25], [102.25, 62.15], [102.5, 62.25], [102.75, 62.15], [103.0, 62.25], [103.25, 62.15], [103.32, 62.18], [103.47, 62.53], [104.0, 62.75], [104.25, 62.65], [104.5, 62.75], [104.75, 62.65], [105.0, 62.75], [105.25, 62.65], [105.5, 62.75], [106.03, 62.53], [106.18, 62.18], [106.25, 62.15], [106.5, 62.25], [107.03, 62.03], [107.25, 61.5], [107.15, 61.25], [107.25, 61.0], [107.03, 60.47], [106.5, 60.25], [106.25, 60.35], [106.18, 60.32], [106.03, 59.97], [105.68, 59.82], [105.53, 59.47], [105.18, 59.32], [105.03, 58.97], [104.5, 58.75], [104.25, 58.85], [104.18, 58.82], [104.03, 58.47], [103.5, 58.25], [103.25, 58.35], [103.0, 58.25], [102.75, 58.35], [102.5, 58.25], [102.25, 58.35], [102.18, 58.32], [102.03, 57.97], [101.5, 57.75], [101.25, 57.85], [101.0, 57.75], [100.75, 57.85], [100.5, 57.75], [99.97, 57.97], [99.75, 58.5], [99.97, 59.03], [100.32, 59.18], [100.46, 59.5], [100.25, 60.0], [100.35, 60.25], [100.32, 60.32], [99.97, 60.47], [99.75, 61.0], [99.85, 61.25], [99.75, 61.5], [99.97, 62.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.27237707528559}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.447749356797294}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.67953296553344, 10.478855139212385, 11.279967796775452, 13.501856956707798]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.046507678595788, 6.563656037150167, 7.226540912382518, 12.160287645948245]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.081874081671452, -7.073915498637052, -6.314245644175606, -4.826089425117406]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.27237707528559, -8.741616477422326, -8.358004251111595, -5.7083358834617]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8391932248293494, -1.9482267411179863, -1.7599061688185378, -1.466274158869588]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.40738462096456, -2.5102499252849935, -2.0465116262383525, -1.600422322946265]}}