{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:31.563812", "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-Sep-22_to_2021-Sep-25_34.0_38.5"}, "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": 2021090000767}, "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": "September 22 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 2021"}, "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": 281748.37649445946}, "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", "T\u00fcrkiye"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "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": ["Black 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": 38.5}, "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": 34.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 31.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 40.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[39.15, 40.25], [39.25, 40.0], [39.03, 39.47], [38.63, 39.3], [38.75, 39.0], [38.53, 38.47], [38.18, 38.32], [38.03, 37.97], [37.5, 37.75], [37.25, 37.85], [37.0, 37.75], [36.75, 37.85], [36.68, 37.82], [36.53, 37.47], [36.0, 37.25], [35.75, 37.35], [35.5, 37.25], [35.25, 37.35], [35.18, 37.32], [35.03, 36.97], [34.5, 36.75], [34.25, 36.85], [34.18, 36.82], [34.03, 36.47], [33.5, 36.25], [33.25, 36.35], [33.0, 36.25], [32.47, 36.47], [32.32, 36.82], [31.97, 36.97], [31.75, 37.5], [31.97, 38.03], [32.32, 38.18], [32.35, 38.25], [32.25, 38.5], [32.38, 38.8], [32.25, 38.85], [32.0, 38.75], [31.47, 38.97], [31.25, 39.5], [31.38, 39.8], [30.97, 39.97], [30.82, 40.32], [30.47, 40.47], [30.25, 41.0], [30.47, 41.53], [30.82, 41.68], [30.97, 42.03], [31.5, 42.25], [31.8, 42.13], [31.97, 42.53], [32.5, 42.75], [32.75, 42.65], [32.82, 42.68], [32.97, 43.03], [33.5, 43.25], [33.75, 43.15], [34.0, 43.25], [34.25, 43.15], [34.5, 43.25], [34.75, 43.15], [35.0, 43.25], [35.25, 43.15], [35.32, 43.18], [35.35, 43.25], [35.25, 43.5], [35.47, 44.03], [36.0, 44.25], [36.53, 44.03], [36.68, 43.68], [36.75, 43.65], [37.0, 43.75], [37.25, 43.65], [37.5, 43.75], [37.74, 43.65], [37.75, 43.65], [37.82, 43.68], [37.85, 43.75], [37.75, 44.0], [37.97, 44.53], [38.5, 44.75], [38.75, 44.65], [39.0, 44.75], [39.53, 44.53], [39.68, 44.18], [39.75, 44.15], [40.0, 44.25], [40.53, 44.03], [40.75, 43.5], [40.54, 43.0], [40.75, 42.5], [40.53, 41.97], [40.0, 41.75], [39.5, 41.96], [39.0, 41.75], [38.75, 41.85], [38.5, 41.75], [39.03, 41.53], [39.25, 41.0], [39.15, 40.75], [39.25, 40.5], [39.15, 40.25]], [[38.2, 41.87], [38.15, 41.75], [38.18, 41.68], [38.25, 41.65], [38.5, 41.75], [38.2, 41.87]], [[33.13, 39.2], [33.25, 39.15], [33.32, 39.18], [33.43, 39.43], [33.18, 39.32], [33.13, 39.2]], [[33.68, 39.82], [33.57, 39.57], [33.82, 39.68], [33.88, 39.8], [33.75, 39.85], [33.68, 39.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "W.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.97, 42.03], [31.5, 42.25], [31.8, 42.13], [31.97, 42.53], [32.5, 42.75], [32.75, 42.65], [32.82, 42.68], [32.97, 43.03], [33.5, 43.25], [33.75, 43.15], [34.0, 43.25], [34.25, 43.15], [34.5, 43.25], [34.75, 43.15], [35.0, 43.25], [35.25, 43.15], [35.32, 43.18], [35.35, 43.25], [35.25, 43.5], [35.47, 44.03], [36.0, 44.25], [36.53, 44.03], [36.68, 43.68], [36.75, 43.65], [37.0, 43.75], [37.25, 43.65], [37.5, 43.75], [37.93, 43.57], [37.75, 44.0], [37.97, 44.53], [38.5, 44.75], [38.75, 44.65], [39.0, 44.75], [39.53, 44.53], [39.75, 44.0], [39.65, 43.75], [39.75, 43.5], [39.53, 42.97], [39.0, 42.75], [38.47, 42.97], [38.32, 43.32], [38.07, 43.43], [38.25, 43.0], [38.15, 42.75], [38.25, 42.5], [38.15, 42.25], [38.25, 42.0], [38.15, 41.75], [38.18, 41.68], [38.25, 41.65], [38.5, 41.75], [39.03, 41.53], [39.25, 41.0], [39.03, 40.47], [38.5, 40.25], [38.25, 40.35], [38.0, 40.25], [37.75, 40.35], [37.5, 40.25], [37.25, 40.35], [37.0, 40.25], [36.75, 40.35], [36.5, 40.25], [36.25, 40.35], [36.18, 40.32], [36.03, 39.97], [35.5, 39.75], [35.25, 39.85], [35.0, 39.75], [34.47, 39.97], [34.32, 40.32], [33.97, 40.47], [33.82, 40.82], [33.47, 40.97], [33.32, 41.32], [33.25, 41.35], [33.0, 41.25], [32.75, 41.35], [32.5, 41.25], [32.2, 41.38], [32.03, 40.97], [31.68, 40.82], [31.53, 40.47], [31.0, 40.25], [30.47, 40.47], [30.25, 41.0], [30.47, 41.53], [30.82, 41.68], [30.97, 42.03]]]]}, "2021-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.47, 40.47], [30.25, 41.0], [30.47, 41.53], [30.82, 41.68], [30.97, 42.03], [31.5, 42.25], [31.8, 42.13], [31.97, 42.53], [32.5, 42.75], [32.75, 42.65], [32.82, 42.68], [32.97, 43.03], [33.5, 43.25], [33.75, 43.15], [34.0, 43.25], [34.25, 43.15], [34.5, 43.25], [34.75, 43.15], [35.0, 43.25], [35.25, 43.15], [35.32, 43.18], [35.35, 43.25], [35.25, 43.5], [35.47, 44.03], [36.0, 44.25], [36.53, 44.03], [36.68, 43.68], [36.75, 43.65], [37.0, 43.75], [37.25, 43.65], [37.5, 43.75], [37.75, 43.65], [37.82, 43.68], [37.85, 43.75], [37.75, 44.0], [37.97, 44.53], [38.5, 44.75], [38.75, 44.65], [39.0, 44.75], [39.53, 44.53], [39.68, 44.18], [39.75, 44.15], [40.0, 44.25], [40.53, 44.03], [40.75, 43.5], [40.54, 43.0], [40.75, 42.5], [40.53, 41.97], [40.0, 41.75], [39.5, 41.96], [39.0, 41.75], [38.75, 41.85], [38.5, 41.75], [39.03, 41.53], [39.25, 41.0], [39.15, 40.75], [39.25, 40.5], [39.15, 40.25], [39.25, 40.0], [39.03, 39.47], [38.63, 39.3], [38.75, 39.0], [38.53, 38.47], [38.18, 38.32], [38.03, 37.97], [37.5, 37.75], [37.25, 37.85], [37.0, 37.75], [36.75, 37.85], [36.68, 37.82], [36.53, 37.47], [36.0, 37.25], [35.75, 37.35], [35.5, 37.25], [35.25, 37.35], [35.18, 37.32], [35.03, 36.97], [34.5, 36.75], [34.25, 36.85], [34.18, 36.82], [34.03, 36.47], [33.5, 36.25], [33.25, 36.35], [33.0, 36.25], [32.47, 36.47], [32.32, 36.82], [31.97, 36.97], [31.75, 37.5], [31.97, 38.03], [32.32, 38.18], [32.35, 38.25], [32.25, 38.5], [32.38, 38.8], [32.25, 38.85], [32.0, 38.75], [31.47, 38.97], [31.25, 39.5], [31.38, 39.8], [30.97, 39.97], [30.82, 40.32], [30.47, 40.47]], [[38.2, 41.88], [38.15, 41.75], [38.18, 41.68], [38.25, 41.65], [38.5, 41.75], [38.2, 41.88]], [[33.25, 39.15], [33.32, 39.18], [33.43, 39.43], [33.18, 39.32], [33.13, 39.2], [33.25, 39.15]], [[33.57, 39.57], [33.82, 39.68], [33.88, 39.8], [33.75, 39.85], [33.68, 39.82], [33.57, 39.57]]]]}, "2021-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.47, 40.47], [30.25, 41.0], [30.47, 41.53], [30.82, 41.68], [30.97, 42.03], [31.5, 42.25], [31.8, 42.13], [31.97, 42.53], [32.5, 42.75], [32.75, 42.65], [32.82, 42.68], [32.97, 43.03], [33.5, 43.25], [33.75, 43.15], [34.0, 43.25], [34.25, 43.15], [34.5, 43.25], [34.75, 43.15], [35.0, 43.25], [35.25, 43.15], [35.32, 43.18], [35.35, 43.25], [35.25, 43.5], [35.47, 44.03], [36.0, 44.25], [36.53, 44.03], [36.68, 43.68], [36.75, 43.65], [37.0, 43.75], [37.25, 43.65], [37.5, 43.75], [37.75, 43.65], [37.82, 43.68], [37.85, 43.75], [37.75, 44.0], [37.97, 44.53], [38.5, 44.75], [38.75, 44.65], [39.0, 44.75], [39.53, 44.53], [39.68, 44.18], [39.75, 44.15], [40.0, 44.25], [40.53, 44.03], [40.75, 43.5], [40.54, 43.0], [40.75, 42.5], [40.53, 41.97], [40.0, 41.75], [39.5, 41.96], [39.0, 41.75], [38.75, 41.85], [38.5, 41.75], [39.03, 41.53], [39.25, 41.0], [39.15, 40.75], [39.25, 40.5], [39.15, 40.25], [39.25, 40.0], [39.03, 39.47], [38.63, 39.3], [38.75, 39.0], [38.53, 38.47], [38.18, 38.32], [38.03, 37.97], [37.5, 37.75], [37.25, 37.85], [37.0, 37.75], [36.75, 37.85], [36.68, 37.82], [36.53, 37.47], [36.0, 37.25], [35.75, 37.35], [35.5, 37.25], [35.25, 37.35], [35.18, 37.32], [35.03, 36.97], [34.5, 36.75], [34.25, 36.85], [34.18, 36.82], [34.03, 36.47], [33.5, 36.25], [33.25, 36.35], [33.0, 36.25], [32.47, 36.47], [32.32, 36.82], [31.97, 36.97], [31.75, 37.5], [31.97, 38.03], [32.32, 38.18], [32.35, 38.25], [32.25, 38.5], [32.38, 38.8], [32.25, 38.85], [32.0, 38.75], [31.47, 38.97], [31.25, 39.5], [31.38, 39.8], [30.97, 39.97], [30.82, 40.32], [30.47, 40.47]], [[38.2, 41.88], [38.15, 41.75], [38.18, 41.68], [38.25, 41.65], [38.5, 41.75], [38.2, 41.88]], [[33.25, 39.15], [33.32, 39.18], [33.43, 39.43], [33.18, 39.32], [33.13, 39.2], [33.25, 39.15]], [[33.57, 39.57], [33.82, 39.68], [33.88, 39.8], [33.75, 39.85], [33.68, 39.82], [33.57, 39.57]]]]}, "2021-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.75, 40.5], [30.97, 41.03], [31.5, 41.25], [31.75, 41.15], [31.88, 41.2], [31.75, 41.5], [31.97, 42.03], [32.5, 42.25], [32.75, 42.15], [33.0, 42.25], [33.25, 42.15], [33.5, 42.25], [34.0, 42.04], [34.5, 42.25], [35.03, 42.03], [35.25, 41.5], [35.03, 40.97], [34.68, 40.82], [34.65, 40.75], [34.75, 40.5], [34.63, 40.2], [34.75, 40.15], [35.0, 40.25], [35.25, 40.15], [35.38, 40.2], [35.25, 40.5], [35.47, 41.03], [36.0, 41.25], [36.25, 41.15], [36.5, 41.25], [36.75, 41.15], [37.0, 41.25], [37.25, 41.15], [37.5, 41.25], [37.75, 41.15], [38.0, 41.25], [38.25, 41.15], [38.5, 41.25], [39.03, 41.03], [39.25, 40.5], [39.15, 40.25], [39.25, 40.0], [39.03, 39.47], [38.63, 39.3], [38.75, 39.0], [38.53, 38.47], [38.18, 38.32], [38.03, 37.97], [37.5, 37.75], [37.25, 37.85], [37.0, 37.75], [36.75, 37.85], [36.68, 37.82], [36.53, 37.47], [36.0, 37.25], [35.75, 37.35], [35.5, 37.25], [35.25, 37.35], [35.18, 37.32], [35.03, 36.97], [34.5, 36.75], [34.25, 36.85], [34.18, 36.82], [34.03, 36.47], [33.5, 36.25], [33.25, 36.35], [33.0, 36.25], [32.47, 36.47], [32.32, 36.82], [31.97, 36.97], [31.75, 37.5], [31.97, 38.03], [32.32, 38.18], [32.35, 38.25], [32.25, 38.5], [32.38, 38.8], [32.25, 38.85], [32.0, 38.75], [31.47, 38.97], [31.25, 39.5], [31.38, 39.8], [30.97, 39.97], [30.75, 40.5]], [[33.32, 39.18], [33.43, 39.43], [33.18, 39.32], [33.13, 39.2], [33.25, 39.15], [33.32, 39.18]], [[33.82, 39.68], [33.88, 39.8], [33.75, 39.85], [33.68, 39.82], [33.57, 39.57], [33.82, 39.68]]], [[[37.25, 43.0], [37.47, 43.53], [37.82, 43.68], [37.85, 43.75], [37.75, 44.0], [37.97, 44.53], [38.5, 44.75], [39.03, 44.53], [39.2, 44.13], [39.5, 44.25], [39.75, 44.15], [40.0, 44.25], [40.53, 44.03], [40.75, 43.5], [40.54, 43.0], [40.75, 42.5], [40.53, 41.97], [40.0, 41.75], [39.5, 41.96], [39.0, 41.75], [38.75, 41.85], [38.5, 41.75], [37.97, 41.97], [37.82, 42.32], [37.47, 42.47], [37.25, 43.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.9412365092832715}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.974399106593696}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.668375129546973, 12.229671082719051, 11.903511807328528, 11.780004006104775]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.101504243913325, 7.092798649082795, 5.937146339006915, 7.2576684807780225]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.519833883258706, -5.292085464863421, -5.4444722227775, -4.582985425725956]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.558649419713674, -7.610832481102136, -7.9412365092832715, -6.114027537304253]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.516390707282869, -1.9248602639158945, -1.9597860856793694, -1.5519989372317615]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.930320121338134, -2.501968004186082, -2.7498682668736154, -2.101472665396197]}}