{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:18.128897", "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": "2019-Mar-02_to_2019-Mar-07_34.5_66.5"}, "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": 2019030000137}, "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 02 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 07 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 68380.39993269616}, "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": ["Finland", "Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Europe"]}, "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": ["White Sea"]}, "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": 66.5}, "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": 34.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 27.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 36.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.5, 68.25], [33.75, 68.15], [34.0, 68.25], [34.25, 68.15], [34.5, 68.25], [35.03, 68.03], [35.2, 67.63], [35.5, 67.75], [36.03, 67.53], [36.25, 67.0], [36.03, 66.47], [35.5, 66.25], [35.2, 66.38], [35.03, 65.97], [34.5, 65.75], [33.97, 65.97], [33.75, 66.5], [33.88, 66.8], [33.75, 66.85], [33.5, 66.75], [33.2, 66.88], [33.03, 66.47], [32.5, 66.25], [31.97, 66.47], [31.75, 67.0], [31.97, 67.53], [32.5, 67.75], [32.8, 67.63], [32.97, 68.03], [33.5, 68.25]]]]}, "2019-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.25, 66.0], [27.47, 66.53], [28.0, 66.75], [28.25, 66.65], [28.5, 66.75], [28.75, 66.65], [28.82, 66.68], [28.85, 66.75], [28.75, 67.0], [28.97, 67.53], [29.5, 67.75], [29.75, 67.65], [30.0, 67.75], [30.25, 67.65], [30.5, 67.75], [30.75, 67.65], [31.0, 67.75], [31.25, 67.65], [31.5, 67.75], [31.75, 67.65], [32.0, 67.75], [32.25, 67.65], [32.5, 67.75], [32.75, 67.65], [32.82, 67.68], [32.97, 68.03], [33.5, 68.25], [33.75, 68.15], [34.0, 68.25], [34.25, 68.15], [34.5, 68.25], [35.03, 68.03], [35.2, 67.63], [35.5, 67.75], [36.03, 67.53], [36.25, 67.0], [36.15, 66.75], [36.18, 66.68], [36.25, 66.65], [36.5, 66.75], [37.03, 66.53], [37.25, 66.0], [37.03, 65.47], [36.5, 65.25], [36.25, 65.35], [36.18, 65.32], [36.03, 64.97], [35.5, 64.75], [35.25, 64.85], [35.0, 64.75], [34.75, 64.85], [34.5, 64.75], [34.25, 64.85], [34.0, 64.75], [33.75, 64.85], [33.5, 64.75], [33.0, 64.96], [32.5, 64.75], [32.25, 64.85], [32.0, 64.75], [31.75, 64.85], [31.5, 64.75], [31.25, 64.85], [31.0, 64.75], [30.5, 64.96], [30.0, 64.75], [29.47, 64.97], [29.3, 65.38], [29.0, 65.25], [28.75, 65.35], [28.68, 65.32], [28.53, 64.97], [28.18, 64.82], [28.03, 64.47], [27.5, 64.25], [26.97, 64.47], [26.75, 65.0], [26.97, 65.53], [27.32, 65.68], [27.35, 65.75], [27.25, 66.0]]]]}, "2019-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.25, 66.0], [27.47, 66.53], [28.0, 66.75], [28.25, 66.65], [28.5, 66.75], [28.75, 66.65], [28.82, 66.68], [28.85, 66.75], [28.75, 67.0], [28.97, 67.53], [29.5, 67.75], [29.75, 67.65], [30.0, 67.75], [30.25, 67.65], [30.5, 67.75], [30.75, 67.65], [31.0, 67.75], [31.25, 67.65], [31.5, 67.75], [31.75, 67.65], [32.0, 67.75], [32.25, 67.65], [32.5, 67.75], [32.75, 67.65], [32.82, 67.68], [32.97, 68.03], [33.5, 68.25], [33.75, 68.15], [34.0, 68.25], [34.25, 68.15], [34.5, 68.25], [35.03, 68.03], [35.2, 67.63], [35.5, 67.75], [36.03, 67.53], [36.25, 67.0], [36.15, 66.75], [36.18, 66.68], [36.25, 66.65], [36.5, 66.75], [37.03, 66.53], [37.25, 66.0], [37.03, 65.47], [36.5, 65.25], [36.25, 65.35], [36.18, 65.32], [36.03, 64.97], [35.5, 64.75], [35.25, 64.85], [35.0, 64.75], [34.75, 64.85], [34.5, 64.75], [34.25, 64.85], [34.0, 64.75], [33.75, 64.85], [33.5, 64.75], [33.0, 64.96], [32.5, 64.75], [32.25, 64.85], [32.0, 64.75], [31.75, 64.85], [31.5, 64.75], [31.25, 64.85], [31.0, 64.75], [30.5, 64.96], [30.0, 64.75], [29.47, 64.97], [29.3, 65.38], [29.0, 65.25], [28.75, 65.35], [28.68, 65.32], [28.53, 64.97], [28.18, 64.82], [28.03, 64.47], [27.5, 64.25], [26.97, 64.47], [26.75, 65.0], [26.97, 65.53], [27.32, 65.68], [27.35, 65.75], [27.25, 66.0]]]]}, "2019-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.25, 66.0], [27.47, 66.53], [28.0, 66.75], [28.25, 66.65], [28.5, 66.75], [28.75, 66.65], [28.82, 66.68], [28.85, 66.75], [28.75, 67.0], [28.97, 67.53], [29.5, 67.75], [29.75, 67.65], [30.0, 67.75], [30.25, 67.65], [30.5, 67.75], [30.75, 67.65], [31.0, 67.75], [31.25, 67.65], [31.5, 67.75], [31.75, 67.65], [32.0, 67.75], [32.25, 67.65], [32.5, 67.75], [32.75, 67.65], [33.0, 67.75], [33.25, 67.65], [33.32, 67.68], [33.47, 68.03], [34.0, 68.25], [34.25, 68.15], [34.5, 68.25], [35.03, 68.03], [35.25, 67.5], [35.13, 67.2], [35.25, 67.15], [35.5, 67.25], [36.03, 67.03], [36.18, 66.68], [36.25, 66.65], [36.5, 66.75], [37.03, 66.53], [37.25, 66.0], [37.03, 65.47], [36.5, 65.25], [36.25, 65.35], [36.18, 65.32], [36.03, 64.97], [35.5, 64.75], [35.25, 64.85], [35.0, 64.75], [34.75, 64.85], [34.5, 64.75], [34.25, 64.85], [34.0, 64.75], [33.75, 64.85], [33.5, 64.75], [33.0, 64.96], [32.5, 64.75], [32.25, 64.85], [32.0, 64.75], [31.75, 64.85], [31.5, 64.75], [31.25, 64.85], [31.0, 64.75], [30.5, 64.96], [30.0, 64.75], [29.47, 64.97], [29.3, 65.38], [29.0, 65.25], [28.75, 65.35], [28.68, 65.32], [28.53, 64.97], [28.18, 64.82], [28.03, 64.47], [27.5, 64.25], [26.97, 64.47], [26.75, 65.0], [26.97, 65.53], [27.32, 65.68], [27.35, 65.75], [27.25, 66.0]]]]}, "2019-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.47, 64.97], [31.25, 65.5], [31.47, 66.03], [32.0, 66.25], [32.53, 66.03], [32.75, 65.5], [32.53, 64.97], [32.0, 64.75], [31.47, 64.97]]], [[[33.47, 67.03], [34.0, 67.25], [34.25, 67.15], [34.5, 67.25], [34.75, 67.15], [35.0, 67.25], [35.53, 67.03], [35.68, 66.68], [35.75, 66.65], [36.0, 66.75], [36.25, 66.65], [36.5, 66.75], [37.03, 66.53], [37.25, 66.0], [37.03, 65.47], [36.5, 65.25], [36.25, 65.35], [36.18, 65.32], [36.03, 64.97], [35.5, 64.75], [35.25, 64.85], [35.0, 64.75], [34.47, 64.97], [34.25, 65.5], [34.35, 65.75], [34.32, 65.82], [34.25, 65.85], [34.0, 65.75], [33.47, 65.97], [33.25, 66.5], [33.47, 67.03]]], [[[31.75, 67.0], [31.97, 67.53], [32.5, 67.75], [33.03, 67.53], [33.25, 67.0], [33.03, 66.47], [32.5, 66.25], [31.97, 66.47], [31.75, 67.0]]]]}, "2019-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.5, 67.25], [35.03, 67.03], [35.25, 66.5], [35.03, 65.97], [34.5, 65.75], [33.97, 65.97], [33.75, 66.5], [33.97, 67.03], [34.5, 67.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.534965049485123}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.957495231667599}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-16.68332218773054, -16.275602559660683, -16.593520916719285, -15.503430953858413, -12.261950100624802, -10.357322637676077]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-19.37808454593096, -20.006668422141814, -18.64799399412081, -18.160686199993933, -12.943924835446353, -10.357322637676077]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.671560129511723, -8.079900530720792, -8.449531747663116, -7.7716201498934945, -6.226370163521707, -4.77256110055589]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.936528881009508, -10.534965049485123, -10.241280686388762, -9.36571213873873, -6.524365452561881, -4.77256110055589]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4790072155785234, -1.6677587888320446, -1.7394596905096653, -1.625748276247354, -1.6257769771941462, -1.275556981123006]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.669329815980141, -2.358147675928796, -2.3812227031412974, -2.040547151935795, -1.7937830530363286, -1.275556981123006]}}