{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:00.333401", "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": "2021-Jun-11_to_2021-Jun-18_103.5_51.0"}, "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": 2021060000461}, "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": "June 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 18 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 218706.5493930468}, "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", "Russian Federation"]}, "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": 51.0}, "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": 103.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "103.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 102.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 111.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-06-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 50.47], [101.75, 51.0], [101.97, 51.53], [102.5, 51.75], [102.75, 51.65], [103.0, 51.75], [103.25, 51.65], [103.5, 51.75], [104.03, 51.53], [104.25, 51.0], [104.03, 50.47], [103.5, 50.25], [103.25, 50.35], [103.0, 50.25], [102.75, 50.35], [102.5, 50.25], [101.97, 50.47]]]]}, "2021-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 50.47], [101.75, 51.0], [101.97, 51.53], [102.5, 51.75], [102.75, 51.65], [103.0, 51.75], [103.25, 51.65], [103.5, 51.75], [104.03, 51.53], [104.25, 51.0], [104.03, 50.47], [103.5, 50.25], [103.25, 50.35], [103.0, 50.25], [102.75, 50.35], [102.5, 50.25], [101.97, 50.47]]]]}, "2021-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 50.47], [101.75, 51.0], [101.97, 51.53], [102.5, 51.75], [102.75, 51.65], [103.0, 51.75], [103.25, 51.65], [103.5, 51.75], [104.03, 51.53], [104.25, 51.0], [104.03, 50.47], [103.5, 50.25], [103.25, 50.35], [103.0, 50.25], [102.75, 50.35], [102.5, 50.25], [101.97, 50.47]]]]}, "2021-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 51.53], [102.5, 51.75], [102.75, 51.65], [103.0, 51.75], [103.25, 51.65], [103.5, 51.75], [103.75, 51.65], [104.0, 51.75], [104.53, 51.53], [104.68, 51.18], [104.75, 51.15], [105.0, 51.25], [105.25, 51.15], [105.5, 51.25], [105.75, 51.15], [106.0, 51.25], [106.25, 51.15], [106.32, 51.18], [106.47, 51.53], [107.0, 51.75], [107.25, 51.65], [107.5, 51.75], [108.03, 51.53], [108.25, 51.0], [108.03, 50.47], [107.68, 50.32], [107.65, 50.25], [107.75, 50.0], [107.53, 49.47], [107.18, 49.32], [107.03, 48.97], [106.5, 48.75], [106.25, 48.85], [106.18, 48.82], [106.03, 48.47], [105.68, 48.32], [105.53, 47.97], [105.0, 47.75], [104.75, 47.85], [104.5, 47.75], [103.97, 47.97], [103.82, 48.32], [103.47, 48.47], [103.32, 48.82], [102.97, 48.97], [102.75, 49.5], [102.85, 49.75], [102.82, 49.82], [102.75, 49.85], [102.5, 49.75], [101.97, 49.97], [101.75, 50.5], [101.85, 50.75], [101.75, 51.0], [101.97, 51.53]]]]}, "2021-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 51.53], [102.5, 51.75], [102.75, 51.65], [103.0, 51.75], [103.25, 51.65], [103.5, 51.75], [103.75, 51.65], [104.0, 51.75], [104.53, 51.53], [104.68, 51.18], [104.75, 51.15], [105.0, 51.25], [105.25, 51.15], [105.5, 51.25], [105.75, 51.15], [106.0, 51.25], [106.25, 51.15], [106.32, 51.18], [106.47, 51.53], [107.0, 51.75], [107.25, 51.65], [107.5, 51.75], [108.03, 51.53], [108.25, 51.0], [108.13, 50.7], [108.25, 50.65], [108.5, 50.75], [108.75, 50.65], [109.0, 50.75], [109.25, 50.65], [109.5, 50.75], [110.03, 50.53], [110.25, 50.0], [110.15, 49.75], [110.18, 49.68], [110.53, 49.53], [110.68, 49.18], [110.75, 49.15], [111.0, 49.25], [111.25, 49.15], [111.5, 49.25], [112.03, 49.03], [112.25, 48.5], [112.03, 47.97], [111.68, 47.82], [111.65, 47.75], [111.75, 47.5], [111.53, 46.97], [111.0, 46.75], [110.75, 46.85], [110.68, 46.82], [110.53, 46.47], [110.0, 46.25], [109.75, 46.35], [109.68, 46.32], [109.53, 45.97], [109.0, 45.75], [108.75, 45.85], [108.68, 45.82], [108.53, 45.47], [108.0, 45.25], [107.75, 45.35], [107.68, 45.32], [107.53, 44.97], [107.0, 44.75], [106.75, 44.85], [106.5, 44.75], [106.25, 44.85], [106.0, 44.75], [105.47, 44.97], [105.25, 45.5], [105.47, 46.03], [105.88, 46.2], [105.82, 46.32], [105.47, 46.47], [105.25, 47.0], [105.35, 47.25], [105.25, 47.5], [105.35, 47.75], [105.3, 47.88], [105.0, 47.75], [104.75, 47.85], [104.5, 47.75], [103.97, 47.97], [103.82, 48.32], [103.47, 48.47], [103.32, 48.82], [102.97, 48.97], [102.75, 49.5], [102.85, 49.75], [102.82, 49.82], [102.75, 49.85], [102.5, 49.75], [101.97, 49.97], [101.75, 50.5], [101.85, 50.75], [101.75, 51.0], [101.97, 51.53]]]]}, "2021-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 51.53], [102.5, 51.75], [102.75, 51.65], [103.0, 51.75], [103.25, 51.65], [103.5, 51.75], [103.75, 51.65], [104.0, 51.75], [104.53, 51.53], [104.68, 51.18], [104.75, 51.15], [105.0, 51.25], [105.25, 51.15], [105.5, 51.25], [105.75, 51.15], [106.0, 51.25], [106.25, 51.15], [106.32, 51.18], [106.47, 51.53], [107.0, 51.75], [107.25, 51.65], [107.5, 51.75], [108.03, 51.53], [108.25, 51.0], [108.13, 50.7], [108.25, 50.65], [108.5, 50.75], [108.75, 50.65], [109.0, 50.75], [109.25, 50.65], [109.5, 50.75], [110.03, 50.53], [110.25, 50.0], [110.15, 49.75], [110.18, 49.68], [110.53, 49.53], [110.68, 49.18], [110.75, 49.15], [111.0, 49.25], [111.25, 49.15], [111.5, 49.25], [112.03, 49.03], [112.25, 48.5], [112.03, 47.97], [111.68, 47.82], [111.65, 47.75], [111.75, 47.5], [111.53, 46.97], [111.0, 46.75], [110.75, 46.85], [110.68, 46.82], [110.53, 46.47], [110.0, 46.25], [109.75, 46.35], [109.68, 46.32], [109.53, 45.97], [109.0, 45.75], [108.75, 45.85], [108.68, 45.82], [108.53, 45.47], [108.0, 45.25], [107.75, 45.35], [107.68, 45.32], [107.53, 44.97], [107.0, 44.75], [106.75, 44.85], [106.5, 44.75], [106.25, 44.85], [106.0, 44.75], [105.47, 44.97], [105.25, 45.5], [105.47, 46.03], [105.88, 46.2], [105.82, 46.32], [105.47, 46.47], [105.25, 47.0], [105.35, 47.25], [105.25, 47.5], [105.35, 47.75], [105.3, 47.88], [105.0, 47.75], [104.75, 47.85], [104.5, 47.75], [103.97, 47.97], [103.82, 48.32], [103.47, 48.47], [103.32, 48.82], [102.97, 48.97], [102.75, 49.5], [102.85, 49.75], [102.82, 49.82], [102.75, 49.85], [102.5, 49.75], [101.97, 49.97], [101.75, 50.5], [101.85, 50.75], [101.75, 51.0], [101.97, 51.53]]]]}, "2021-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.25, 49.0], [104.47, 49.53], [105.0, 49.75], [105.25, 49.65], [105.5, 49.75], [106.0, 49.54], [106.5, 49.75], [106.75, 49.65], [107.0, 49.75], [107.25, 49.65], [107.32, 49.68], [107.35, 49.75], [107.25, 50.0], [107.47, 50.53], [108.0, 50.75], [108.25, 50.65], [108.5, 50.75], [108.75, 50.65], [109.0, 50.75], [109.25, 50.65], [109.5, 50.75], [110.03, 50.53], [110.25, 50.0], [110.15, 49.75], [110.18, 49.68], [110.53, 49.53], [110.68, 49.18], [110.75, 49.15], [111.0, 49.25], [111.25, 49.15], [111.5, 49.25], [112.03, 49.03], [112.25, 48.5], [112.03, 47.97], [111.68, 47.82], [111.65, 47.75], [111.75, 47.5], [111.53, 46.97], [111.0, 46.75], [110.75, 46.85], [110.68, 46.82], [110.53, 46.47], [110.0, 46.25], [109.75, 46.35], [109.68, 46.32], [109.53, 45.97], [109.0, 45.75], [108.75, 45.85], [108.68, 45.82], [108.53, 45.47], [108.0, 45.25], [107.75, 45.35], [107.68, 45.32], [107.53, 44.97], [107.0, 44.75], [106.75, 44.85], [106.5, 44.75], [106.25, 44.85], [106.0, 44.75], [105.47, 44.97], [105.25, 45.5], [105.47, 46.03], [105.88, 46.2], [105.82, 46.32], [105.47, 46.47], [105.25, 47.0], [105.35, 47.25], [105.25, 47.5], [105.35, 47.75], [105.25, 48.0], [105.35, 48.25], [105.32, 48.32], [105.25, 48.35], [105.0, 48.25], [104.47, 48.47], [104.25, 49.0]]], [[[101.75, 51.0], [101.97, 51.53], [102.5, 51.75], [102.75, 51.65], [103.0, 51.75], [103.25, 51.65], [103.5, 51.75], [103.75, 51.65], [104.0, 51.75], [104.53, 51.53], [104.75, 51.0], [104.53, 50.47], [104.0, 50.25], [103.75, 50.35], [103.5, 50.25], [103.25, 50.35], [103.0, 50.25], [102.75, 50.35], [102.5, 50.25], [101.97, 50.47], [101.75, 51.0]]]]}, "2021-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.5, 51.75], [104.03, 51.53], [104.25, 51.0], [104.03, 50.47], [103.5, 50.25], [102.97, 50.47], [102.75, 51.0], [102.97, 51.53], [103.5, 51.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.166292882991627}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.745423806444781}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.7665303767358296, 3.4458655002972023, 4.5064982099148665, 10.499884898775178, 9.101484416736696, 9.344079086319766, 10.50118984102221, 5.218357521412486]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.3723921641735615, 2.794018314178004, 4.329391295966673, 2.9301964564245395, -0.5606343848021424, 3.2397987601551677, 3.4468698873327526, 5.218357521412486]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.803856275974226, -6.368567836684368, -5.618329856157914, -6.095793589858293, -7.297330636439753, -7.15172619477386, -5.747896136696259, -5.749908165072895]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.987915007041067, -6.817913863273532, -5.642898961879723, -7.30600728819104, -11.166292882991627, -9.497067595894862, -7.520695743823069, -5.749908165072895]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.103820864938932, -1.7080189781563633, -1.5059385597827237, -1.5895470934224998, -1.9027231918472638, -1.8777326842510424, -1.5432172624389677, -1.5445890976889292]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1654713138489323, -1.8332253560577871, -1.5274753769708065, -1.9725492384218828, -3.028441987535963, -2.2503678496109822, -2.0963166747639974, -1.5445890976889292]}}