{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:18:32.691669", "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": "2020-Jan-27_to_2020-Jan-31_59.5_65.5"}, "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": 2020010000712}, "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": "January 27 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 128724.52018423563}, "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": ["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": ["Barentsz 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": 65.5}, "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": 59.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "59.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 49.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 63.75}, "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": 69.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[58.5, 65.75], [59.03, 65.53], [59.25, 65.0], [59.03, 64.47], [58.5, 64.25], [57.97, 64.47], [57.75, 65.0], [57.97, 65.53], [58.5, 65.75]]]]}, "2020-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.25, 68.65], [54.5, 68.75], [54.75, 68.65], [55.0, 68.75], [55.25, 68.65], [55.5, 68.75], [55.75, 68.65], [56.0, 68.75], [56.25, 68.65], [56.5, 68.75], [56.75, 68.65], [57.0, 68.75], [57.25, 68.65], [57.5, 68.75], [57.75, 68.65], [57.82, 68.68], [57.97, 69.03], [58.5, 69.25], [58.75, 69.15], [59.0, 69.25], [59.53, 69.03], [59.75, 68.5], [59.53, 67.97], [59.18, 67.82], [59.15, 67.75], [59.18, 67.68], [59.25, 67.65], [59.5, 67.75], [59.75, 67.65], [60.0, 67.75], [60.25, 67.65], [60.5, 67.75], [61.03, 67.53], [61.18, 67.18], [61.25, 67.15], [61.5, 67.25], [61.75, 67.15], [62.0, 67.25], [62.25, 67.15], [62.5, 67.25], [62.75, 67.15], [63.0, 67.25], [63.25, 67.15], [63.5, 67.25], [64.03, 67.03], [64.25, 66.5], [64.03, 65.97], [63.5, 65.75], [63.25, 65.85], [63.0, 65.75], [62.75, 65.85], [62.68, 65.82], [62.53, 65.47], [62.0, 65.25], [61.75, 65.35], [61.68, 65.32], [61.53, 64.97], [61.0, 64.75], [60.75, 64.85], [60.5, 64.75], [60.25, 64.85], [60.18, 64.82], [60.03, 64.47], [59.5, 64.25], [59.25, 64.35], [59.0, 64.25], [58.75, 64.35], [58.5, 64.25], [57.97, 64.47], [57.82, 64.82], [57.47, 64.97], [57.32, 65.32], [57.25, 65.35], [57.0, 65.25], [56.75, 65.35], [56.5, 65.25], [55.97, 65.47], [55.82, 65.82], [55.75, 65.85], [55.5, 65.75], [54.97, 65.97], [54.82, 66.32], [54.47, 66.47], [54.32, 66.82], [54.25, 66.85], [54.0, 66.75], [53.75, 66.85], [53.5, 66.75], [52.97, 66.97], [52.75, 67.5], [52.97, 68.03], [53.32, 68.18], [53.47, 68.53], [54.0, 68.75], [54.25, 68.65]]], [[[50.75, 68.0], [50.97, 68.53], [51.5, 68.75], [51.75, 68.65], [52.0, 68.75], [52.53, 68.53], [52.75, 68.0], [52.53, 67.47], [52.0, 67.25], [51.75, 67.35], [51.5, 67.25], [50.97, 67.47], [50.75, 68.0]]]]}, "2020-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[49.47, 67.47], [49.25, 68.0], [49.47, 68.53], [50.0, 68.75], [50.25, 68.65], [50.5, 68.75], [50.75, 68.65], [50.82, 68.68], [50.97, 69.03], [51.32, 69.18], [51.47, 69.53], [52.0, 69.75], [52.25, 69.65], [52.5, 69.75], [52.75, 69.65], [53.0, 69.75], [53.25, 69.65], [53.5, 69.75], [53.75, 69.65], [54.0, 69.75], [54.25, 69.65], [54.5, 69.75], [54.75, 69.65], [55.0, 69.75], [55.25, 69.65], [55.5, 69.75], [55.75, 69.65], [56.0, 69.75], [56.25, 69.65], [56.5, 69.75], [56.75, 69.65], [57.0, 69.75], [57.25, 69.65], [57.5, 69.75], [57.75, 69.65], [58.0, 69.75], [58.25, 69.65], [58.5, 69.75], [58.75, 69.65], [59.0, 69.75], [59.53, 69.53], [59.68, 69.18], [59.75, 69.15], [60.0, 69.25], [60.53, 69.03], [60.75, 68.5], [60.53, 67.97], [60.0, 67.75], [60.25, 67.65], [60.5, 67.75], [61.03, 67.53], [61.18, 67.18], [61.25, 67.15], [61.5, 67.25], [61.75, 67.15], [62.0, 67.25], [62.25, 67.15], [62.5, 67.25], [62.75, 67.15], [63.0, 67.25], [63.25, 67.15], [63.5, 67.25], [64.03, 67.03], [64.25, 66.5], [64.03, 65.97], [63.5, 65.75], [63.25, 65.85], [63.0, 65.75], [62.75, 65.85], [62.68, 65.82], [62.53, 65.47], [62.0, 65.25], [61.75, 65.35], [61.68, 65.32], [61.53, 64.97], [61.0, 64.75], [60.75, 64.85], [60.5, 64.75], [60.25, 64.85], [60.18, 64.82], [60.03, 64.47], [59.5, 64.25], [59.25, 64.35], [59.0, 64.25], [58.75, 64.35], [58.5, 64.25], [57.97, 64.47], [57.82, 64.82], [57.47, 64.97], [57.32, 65.32], [57.25, 65.35], [57.0, 65.25], [56.75, 65.35], [56.5, 65.25], [55.97, 65.47], [55.82, 65.82], [55.75, 65.85], [55.5, 65.75], [54.97, 65.97], [54.82, 66.32], [54.47, 66.47], [54.32, 66.82], [54.25, 66.85], [54.0, 66.75], [53.75, 66.85], [53.5, 66.75], [53.0, 66.96], [52.5, 66.75], [52.25, 66.85], [52.0, 66.75], [51.47, 66.97], [51.32, 67.32], [51.25, 67.35], [51.0, 67.25], [50.75, 67.35], [50.5, 67.25], [50.25, 67.35], [50.0, 67.25], [49.47, 67.47]], [[59.75, 67.85], [59.5, 67.75], [59.75, 67.65], [60.0, 67.75], [59.75, 67.85]], [[59.25, 67.85], [59.18, 67.82], [59.15, 67.75], [59.18, 67.68], [59.25, 67.65], [59.5, 67.75], [59.25, 67.85]]]]}, "2020-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[49.47, 67.47], [49.25, 68.0], [49.47, 68.53], [50.0, 68.75], [50.25, 68.65], [50.5, 68.75], [50.75, 68.65], [50.82, 68.68], [50.97, 69.03], [51.32, 69.18], [51.47, 69.53], [52.0, 69.75], [52.25, 69.65], [52.5, 69.75], [52.75, 69.65], [53.0, 69.75], [53.25, 69.65], [53.5, 69.75], [53.75, 69.65], [54.0, 69.75], [54.25, 69.65], [54.5, 69.75], [54.75, 69.65], [55.0, 69.75], [55.25, 69.65], [55.5, 69.75], [55.75, 69.65], [56.0, 69.75], [56.25, 69.65], [56.5, 69.75], [56.75, 69.65], [57.0, 69.75], [57.25, 69.65], [57.5, 69.75], [57.75, 69.65], [58.0, 69.75], [58.25, 69.65], [58.5, 69.75], [58.75, 69.65], [59.0, 69.75], [59.53, 69.53], [59.68, 69.18], [59.75, 69.15], [60.0, 69.25], [60.53, 69.03], [60.75, 68.5], [60.53, 67.97], [60.0, 67.75], [60.25, 67.65], [60.5, 67.75], [61.03, 67.53], [61.18, 67.18], [61.25, 67.15], [61.5, 67.25], [61.75, 67.15], [62.0, 67.25], [62.25, 67.15], [62.5, 67.25], [62.75, 67.15], [63.0, 67.25], [63.25, 67.15], [63.5, 67.25], [64.03, 67.03], [64.25, 66.5], [64.03, 65.97], [63.5, 65.75], [63.25, 65.85], [63.0, 65.75], [62.75, 65.85], [62.68, 65.82], [62.53, 65.47], [62.0, 65.25], [61.75, 65.35], [61.68, 65.32], [61.53, 64.97], [61.0, 64.75], [60.75, 64.85], [60.5, 64.75], [60.25, 64.85], [60.18, 64.82], [60.03, 64.47], [59.5, 64.25], [59.25, 64.35], [59.0, 64.25], [58.75, 64.35], [58.5, 64.25], [57.97, 64.47], [57.82, 64.82], [57.47, 64.97], [57.32, 65.32], [57.25, 65.35], [57.0, 65.25], [56.75, 65.35], [56.5, 65.25], [55.97, 65.47], [55.82, 65.82], [55.75, 65.85], [55.5, 65.75], [54.97, 65.97], [54.82, 66.32], [54.47, 66.47], [54.32, 66.82], [54.25, 66.85], [54.0, 66.75], [53.75, 66.85], [53.5, 66.75], [53.0, 66.96], [52.5, 66.75], [52.25, 66.85], [52.0, 66.75], [51.47, 66.97], [51.32, 67.32], [51.25, 67.35], [51.0, 67.25], [50.75, 67.35], [50.5, 67.25], [50.25, 67.35], [50.0, 67.25], [49.47, 67.47]], [[59.75, 67.85], [59.5, 67.75], [59.75, 67.65], [60.0, 67.75], [59.75, 67.85]], [[59.25, 67.85], [59.18, 67.82], [59.15, 67.75], [59.18, 67.68], [59.25, 67.65], [59.5, 67.75], [59.25, 67.85]]]]}, "2020-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.75, 66.5], [54.97, 67.03], [55.5, 67.25], [56.03, 67.03], [56.2, 66.63], [56.5, 66.75], [56.75, 66.65], [57.0, 66.75], [57.53, 66.53], [57.7, 66.13], [58.0, 66.25], [58.25, 66.15], [58.5, 66.25], [59.0, 66.04], [59.5, 66.25], [59.75, 66.15], [60.0, 66.25], [60.53, 66.03], [60.75, 65.5], [60.53, 64.97], [60.0, 64.75], [59.75, 64.85], [59.5, 64.75], [59.0, 64.96], [58.5, 64.75], [58.25, 64.85], [58.0, 64.75], [57.47, 64.97], [57.3, 65.38], [57.0, 65.25], [56.75, 65.35], [56.5, 65.25], [55.97, 65.47], [55.8, 65.88], [55.5, 65.75], [54.97, 65.97], [54.75, 66.5]]], [[[49.25, 68.0], [49.47, 68.53], [50.0, 68.75], [50.25, 68.65], [50.5, 68.75], [50.75, 68.65], [50.82, 68.68], [50.97, 69.03], [51.32, 69.18], [51.47, 69.53], [52.0, 69.75], [52.25, 69.65], [52.5, 69.75], [52.75, 69.65], [53.0, 69.75], [53.25, 69.65], [53.5, 69.75], [53.75, 69.65], [54.0, 69.75], [54.25, 69.65], [54.5, 69.75], [54.75, 69.65], [55.0, 69.75], [55.25, 69.65], [55.5, 69.75], [55.75, 69.65], [56.0, 69.75], [56.25, 69.65], [56.5, 69.75], [56.75, 69.65], [57.0, 69.75], [57.25, 69.65], [57.5, 69.75], [57.75, 69.65], [58.0, 69.75], [58.25, 69.65], [58.5, 69.75], [58.75, 69.65], [59.0, 69.75], [59.53, 69.53], [59.68, 69.18], [59.75, 69.15], [60.0, 69.25], [60.53, 69.03], [60.75, 68.5], [60.53, 67.97], [60.0, 67.75], [59.75, 67.85], [59.5, 67.75], [58.97, 67.97], [58.82, 68.32], [58.75, 68.35], [58.5, 68.25], [58.25, 68.35], [58.0, 68.25], [57.75, 68.35], [57.5, 68.25], [57.25, 68.35], [57.0, 68.25], [56.75, 68.35], [56.5, 68.25], [56.25, 68.35], [56.0, 68.25], [55.75, 68.35], [55.5, 68.25], [55.25, 68.35], [55.18, 68.32], [55.03, 67.97], [54.68, 67.82], [54.53, 67.47], [54.0, 67.25], [53.75, 67.35], [53.5, 67.25], [53.25, 67.35], [53.18, 67.32], [53.03, 66.97], [52.5, 66.75], [52.25, 66.85], [52.0, 66.75], [51.47, 66.97], [51.32, 67.32], [51.25, 67.35], [51.0, 67.25], [50.75, 67.35], [50.5, 67.25], [50.25, 67.35], [50.0, 67.25], [49.47, 67.47], [49.25, 68.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -18.079342636483545}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -13.789793770139081}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-28.93625620565183, -32.419179705942184, -32.147288535282314, -32.540187350592305, -29.070258387332217]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-28.93625620565183, -34.18107499544874, -37.480327186706546, -36.9424534331001, -33.831470797908]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.469338461289453, -13.422804239920481, -14.085553946657908, -14.270700484471869, -12.535785089031677]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.469338461289453, -15.309093466022773, -18.079342636483545, -17.29387970104119, -16.10432640793394]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3529975371636747, -1.5582258271056766, -1.662221014289986, -1.679854014974131, -1.5481367647011481]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3529975371636747, -1.867485712028187, -2.0815859785069346, -2.0860184972310774, -1.8147837383044536]}}