{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:27.608235", "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": "2017-Jul-17_to_2017-Jul-19_250.5_54.5"}, "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": 2017070000702}, "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": "July 17 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 19 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 50630.04105402372}, "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.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": 54.5}, "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": 250.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "250.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 248.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 252.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 55.03], [-111.5, 55.25], [-111.25, 55.15], [-111.0, 55.25], [-110.75, 55.15], [-110.68, 55.18], [-110.53, 55.53], [-110.0, 55.75], [-109.75, 55.65], [-109.5, 55.75], [-109.25, 55.65], [-109.0, 55.75], [-108.75, 55.65], [-108.5, 55.75], [-108.25, 55.65], [-108.0, 55.75], [-107.75, 55.65], [-107.5, 55.75], [-106.97, 55.53], [-106.75, 55.0], [-106.97, 54.47], [-107.37, 54.3], [-107.25, 54.0], [-107.35, 53.75], [-107.32, 53.68], [-106.97, 53.53], [-106.75, 53.0], [-106.97, 52.47], [-107.5, 52.25], [-108.03, 52.47], [-108.18, 52.82], [-108.25, 52.85], [-108.5, 52.75], [-108.75, 52.85], [-109.0, 52.75], [-109.25, 52.85], [-109.5, 52.75], [-109.75, 52.85], [-110.0, 52.75], [-110.25, 52.85], [-110.5, 52.75], [-111.03, 52.97], [-111.18, 53.32], [-111.25, 53.35], [-111.5, 53.25], [-112.03, 53.47], [-112.25, 54.0], [-112.15, 54.25], [-112.25, 54.5], [-112.03, 55.03]]]]}, "2017-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 55.03], [-111.5, 55.25], [-111.25, 55.15], [-111.0, 55.25], [-110.75, 55.15], [-110.68, 55.18], [-110.53, 55.53], [-110.0, 55.75], [-109.75, 55.65], [-109.5, 55.75], [-109.25, 55.65], [-109.0, 55.75], [-108.75, 55.65], [-108.5, 55.75], [-108.25, 55.65], [-108.0, 55.75], [-107.75, 55.65], [-107.5, 55.75], [-106.97, 55.53], [-106.75, 55.0], [-106.97, 54.47], [-107.37, 54.3], [-107.25, 54.0], [-107.35, 53.75], [-107.32, 53.68], [-106.97, 53.53], [-106.75, 53.0], [-106.97, 52.47], [-107.5, 52.25], [-108.03, 52.47], [-108.18, 52.82], [-108.25, 52.85], [-108.5, 52.75], [-108.75, 52.85], [-109.0, 52.75], [-109.25, 52.85], [-109.5, 52.75], [-109.75, 52.85], [-110.0, 52.75], [-110.25, 52.85], [-110.5, 52.75], [-111.03, 52.97], [-111.18, 53.32], [-111.25, 53.35], [-111.5, 53.25], [-112.03, 53.47], [-112.25, 54.0], [-112.15, 54.25], [-112.25, 54.5], [-112.03, 55.03]]]]}, "2017-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 55.03], [-111.5, 55.25], [-111.25, 55.15], [-111.0, 55.25], [-110.75, 55.15], [-110.68, 55.18], [-110.53, 55.53], [-110.0, 55.75], [-109.75, 55.65], [-109.5, 55.75], [-109.25, 55.65], [-109.0, 55.75], [-108.75, 55.65], [-108.5, 55.75], [-108.25, 55.65], [-108.0, 55.75], [-107.75, 55.65], [-107.5, 55.75], [-106.97, 55.53], [-106.75, 55.0], [-106.97, 54.47], [-107.37, 54.3], [-107.25, 54.0], [-107.35, 53.75], [-107.32, 53.68], [-106.97, 53.53], [-106.75, 53.0], [-106.97, 52.47], [-107.5, 52.25], [-108.03, 52.47], [-108.18, 52.82], [-108.25, 52.85], [-108.5, 52.75], [-108.75, 52.85], [-109.0, 52.75], [-109.25, 52.85], [-109.5, 52.75], [-109.75, 52.85], [-110.0, 52.75], [-110.25, 52.85], [-110.5, 52.75], [-111.03, 52.97], [-111.18, 53.32], [-111.25, 53.35], [-111.5, 53.25], [-112.03, 53.47], [-112.25, 54.0], [-112.15, 54.25], [-112.25, 54.5], [-112.03, 55.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.405488395148495}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.626874159705014}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.628717291557734, 11.250004992405707, 13.38238911727899]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.916492745246671, 10.47143115579081, 12.588180182147596]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.423283550984877, -5.739681738644693, -3.717657189485471]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.052976925027622, -6.405488395148495, -4.56918236925037]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6380244728425999, -2.176920302298434, -1.4343327965076313]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9109606395699523, -2.4640182448304357, -1.733379635221892]}}