{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:42.639410", "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-May-22_to_2019-May-25_255.0_63.5"}, "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": 2019050000624}, "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 22 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 25 2019"}, "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": 105581.48895144736}, "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": 63.5}, "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": 255.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "255.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 252.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 260.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.03, 64.53], [-106.5, 64.75], [-106.25, 64.65], [-106.0, 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62.75], [-106.68, 62.82], [-107.03, 62.97], [-107.25, 63.5], [-107.15, 63.75], [-107.25, 64.0], [-107.03, 64.53]]]]}, "2019-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.75, 63.5], [-107.53, 64.03], [-107.18, 64.18], [-107.03, 64.53], [-106.5, 64.75], [-106.25, 64.65], [-106.0, 64.75], [-105.75, 64.65], [-105.5, 64.75], [-105.25, 64.65], [-105.0, 64.75], [-104.75, 64.65], [-104.5, 64.75], [-104.25, 64.65], [-104.0, 64.75], [-103.75, 64.65], [-103.5, 64.75], [-103.25, 64.65], [-103.0, 64.75], [-102.47, 64.53], [-102.32, 64.18], [-102.25, 64.15], [-102.0, 64.25], [-101.75, 64.15], [-101.5, 64.25], [-100.97, 64.03], [-100.82, 63.68], [-100.47, 63.53], [-100.32, 63.18], [-99.97, 63.03], [-99.75, 62.5], [-99.85, 62.25], [-99.82, 62.18], [-99.47, 62.03], [-99.25, 61.5], [-99.47, 60.97], [-100.0, 60.75], [-100.25, 60.85], [-100.32, 60.82], [-100.47, 60.47], [-101.0, 60.25], [-101.25, 60.35], [-101.32, 60.32], [-101.47, 59.97], [-102.0, 59.75], [-102.25, 59.85], [-102.5, 59.75], [-103.03, 59.97], [-103.18, 60.32], [-103.25, 60.35], [-103.5, 60.25], [-103.75, 60.35], [-104.0, 60.25], [-104.53, 60.47], [-104.68, 60.82], [-104.75, 60.85], [-105.0, 60.75], [-105.53, 60.97], [-105.68, 61.32], [-106.03, 61.47], [-106.18, 61.82], [-106.53, 61.97], [-106.68, 62.32], [-107.03, 62.47], [-107.18, 62.82], [-107.53, 62.97], [-107.75, 63.5]]]]}, "2019-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.75, 63.5], [-107.53, 64.03], [-107.18, 64.18], [-107.03, 64.53], [-106.5, 64.75], [-106.25, 64.65], [-106.0, 64.75], [-105.75, 64.65], [-105.5, 64.75], [-105.25, 64.65], [-105.0, 64.75], [-104.75, 64.65], [-104.5, 64.75], [-104.25, 64.65], [-104.0, 64.75], [-103.75, 64.65], [-103.5, 64.75], [-103.25, 64.65], [-103.0, 64.75], [-102.47, 64.53], [-102.32, 64.18], [-102.25, 64.15], [-102.0, 64.25], [-101.75, 64.15], [-101.5, 64.25], [-100.97, 64.03], [-100.82, 63.68], [-100.47, 63.53], [-100.32, 63.18], [-99.97, 63.03], [-99.75, 62.5], 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"value": -6.631047617323813}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.636572321955327, -6.7886053843719765, -6.18260615311965, -5.604966048554786]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.46411462124604, -8.57480153544958, -8.48196734934345, -6.805920776058542]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.399398826270062, -6.95840696243062, -6.657533513349226, -6.380894067641883]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.583330441589396, -8.41730212399807, -7.864856361384852, -7.1382361221423025]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.495445338604048, -1.5897065177357572, -1.5144970045623263, -1.3872479958312631]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6981922551581057, -1.7674721544538077, -1.7539629163018584, -1.495674295248441]}}