{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:59:34.186367", "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": "2026-May-15_to_2026-May-18_255.5_58.5"}, "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": 2026050000345}, "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": "May 15 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 18 2026"}, "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": 55229.311714936324}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "N.W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": 58.5}, "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": 255.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "255.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 251.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 257.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.75, 61.0], [-108.53, 61.53], [-108.0, 61.75], [-107.75, 61.65], [-107.5, 61.75], [-107.25, 61.65], [-107.0, 61.75], [-106.47, 61.53], [-106.32, 61.18], [-106.25, 61.15], [-106.0, 61.25], [-105.47, 61.03], [-105.32, 60.68], [-104.97, 60.53], [-104.82, 60.18], [-104.75, 60.15], [-104.5, 60.25], [-104.25, 60.15], [-104.0, 60.25], [-103.75, 60.15], [-103.5, 60.25], [-102.97, 60.03], [-102.82, 59.68], [-102.47, 59.53], [-102.32, 59.18], [-101.97, 59.03], [-101.75, 58.5], [-101.97, 57.97], [-102.5, 57.75], [-103.03, 57.97], [-103.18, 58.32], [-103.25, 58.35], [-103.32, 58.32], [-103.47, 57.97], [-103.82, 57.82], [-103.97, 57.47], [-104.5, 57.25], [-104.75, 57.35], [-105.0, 57.25], [-105.53, 57.47], [-105.68, 57.82], [-105.75, 57.85], [-106.0, 57.75], [-106.25, 57.85], [-106.5, 57.75], [-107.03, 57.97], [-107.18, 58.32], [-107.53, 58.47], [-107.68, 58.82], [-107.75, 58.85], [-108.0, 58.75], [-108.53, 58.97], [-108.75, 59.5], [-108.53, 60.03], [-108.0, 60.25], [-108.53, 60.47], [-108.75, 61.0]], [[-107.75, 60.15], [-107.5, 60.25], [-107.75, 60.35], [-108.0, 60.25], [-107.75, 60.15]], [[-107.25, 60.15], [-107.12, 60.2], [-107.18, 60.32], [-107.25, 60.35], [-107.5, 60.25], [-107.25, 60.15]]]]}, "2026-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.75, 61.0], [-108.53, 61.53], [-108.0, 61.75], [-107.75, 61.65], [-107.5, 61.75], [-107.25, 61.65], [-107.0, 61.75], [-106.47, 61.53], [-106.32, 61.18], [-106.25, 61.15], [-106.0, 61.25], [-105.47, 61.03], [-105.32, 60.68], [-104.97, 60.53], [-104.82, 60.18], [-104.75, 60.15], [-104.5, 60.25], [-104.25, 60.15], [-104.0, 60.25], [-103.75, 60.15], [-103.5, 60.25], [-102.97, 60.03], [-102.82, 59.68], [-102.47, 59.53], [-102.32, 59.18], [-101.97, 59.03], [-101.75, 58.5], [-101.97, 57.97], [-102.5, 57.75], [-103.03, 57.97], [-103.18, 58.32], [-103.25, 58.35], [-103.32, 58.32], [-103.47, 57.97], [-103.82, 57.82], [-103.97, 57.47], [-104.5, 57.25], [-104.75, 57.35], [-105.0, 57.25], [-105.53, 57.47], [-105.68, 57.82], [-105.75, 57.85], [-106.0, 57.75], [-106.25, 57.85], [-106.5, 57.75], [-107.03, 57.97], [-107.18, 58.32], [-107.53, 58.47], [-107.68, 58.82], [-107.75, 58.85], [-108.0, 58.75], [-108.53, 58.97], [-108.75, 59.5], [-108.53, 60.03], [-108.0, 60.25], [-108.53, 60.47], [-108.75, 61.0]], [[-107.75, 60.15], [-107.5, 60.25], [-107.75, 60.35], [-108.0, 60.25], [-107.75, 60.15]], [[-107.25, 60.15], [-107.12, 60.2], [-107.18, 60.32], [-107.25, 60.35], [-107.5, 60.25], [-107.25, 60.15]]]]}, "2026-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.75, 61.0], [-108.53, 61.53], [-108.0, 61.75], [-107.75, 61.65], [-107.5, 61.75], [-107.25, 61.65], [-107.0, 61.75], [-106.47, 61.53], [-106.32, 61.18], [-106.25, 61.15], [-106.0, 61.25], [-105.47, 61.03], [-105.32, 60.68], [-104.97, 60.53], [-104.82, 60.18], [-104.75, 60.15], [-104.5, 60.25], [-104.25, 60.15], [-104.0, 60.25], [-103.75, 60.15], [-103.5, 60.25], [-102.97, 60.03], [-102.82, 59.68], [-102.47, 59.53], [-102.32, 59.18], [-101.97, 59.03], [-101.75, 58.5], 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-0.7095394558376711]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-6.177584075927712, -4.007510884602823, -5.750622812906897, -2.6420806884765398]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.378839014252014, -6.683239790163943, -6.698782558919421, -5.657941724125904]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.133724392796466, -8.277519675916324, -9.526479764512885, -6.819440048335025]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.80170228053645, -1.4517860503319906, -1.4484063573318415, -1.2535787854167546]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0083613646888754, -1.6084854178550136, -1.721825575124889, -1.3252161409729626]}}