{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:37.682962", "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": "2011-Oct-25_to_2011-Oct-28_250.5_70.5"}, "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": 2011100001134}, "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": "October 25 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 28 2011"}, "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": 58247.76853209372}, "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": ["The Northwestern Passages"]}, "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": 70.5}, "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": 244.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 253.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 69.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 72.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 69.97], [-112.25, 70.5], [-112.03, 71.03], [-111.5, 71.25], [-111.25, 71.15], [-111.0, 71.25], [-110.75, 71.15], [-110.5, 71.25], [-110.25, 71.15], [-110.0, 71.25], [-109.75, 71.15], [-109.5, 71.25], [-109.25, 71.15], [-109.0, 71.25], [-108.75, 71.15], [-108.5, 71.25], [-108.25, 71.15], [-108.0, 71.25], [-107.47, 71.03], [-107.25, 70.5], [-107.47, 69.97], [-108.0, 69.75], [-108.25, 69.85], [-108.5, 69.75], [-108.75, 69.85], [-109.0, 69.75], [-109.25, 69.85], [-109.5, 69.75], [-109.75, 69.85], [-110.0, 69.75], [-110.25, 69.85], [-110.5, 69.75], [-110.75, 69.85], [-111.0, 69.75], [-111.25, 69.85], [-111.5, 69.75], [-112.03, 69.97]]]]}, "2011-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 70.97], [-116.25, 71.5], [-116.03, 72.03], [-115.5, 72.25], [-115.25, 72.15], [-115.0, 72.25], [-114.75, 72.15], [-114.5, 72.25], [-114.25, 72.15], [-114.0, 72.25], [-113.75, 72.15], [-113.5, 72.25], [-113.25, 72.15], [-113.18, 72.18], [-113.03, 72.53], [-112.5, 72.75], [-112.25, 72.65], [-112.0, 72.75], [-111.75, 72.65], 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70.82], [-115.25, 70.85], [-115.5, 70.75], [-116.03, 70.97]], [[-107.25, 71.85], [-107.32, 71.82], [-107.35, 71.75], [-107.32, 71.68], [-107.25, 71.65], [-107.0, 71.75], [-107.25, 71.85]]]]}, "2011-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 70.97], [-116.25, 71.5], [-116.03, 72.03], [-115.5, 72.25], [-115.25, 72.15], [-115.0, 72.25], [-114.75, 72.15], [-114.5, 72.25], [-114.25, 72.15], [-114.0, 72.25], [-113.75, 72.15], [-113.5, 72.25], [-113.25, 72.15], [-113.18, 72.18], [-113.03, 72.53], [-112.5, 72.75], [-112.25, 72.65], [-112.0, 72.75], [-111.75, 72.65], [-111.68, 72.68], [-111.53, 73.03], [-111.0, 73.25], [-110.75, 73.15], [-110.5, 73.25], [-110.25, 73.15], [-110.0, 73.25], [-109.75, 73.15], [-109.5, 73.25], [-109.25, 73.15], [-109.0, 73.25], [-108.5, 73.04], [-108.0, 73.25], [-107.75, 73.15], [-107.5, 73.25], [-107.25, 73.15], [-107.0, 73.25], [-106.47, 73.03], [-106.25, 72.5], [-106.47, 71.97], [-107.0, 71.75], [-106.47, 71.53], [-106.25, 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[-24.318586152229955, -31.20175086025634, -31.441520508591452, -30.92697674329824]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.569732300643622, -11.78564479426569, -9.670722196272642, -10.508335206320679]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.017041968530009, -14.442798742275187, -13.592660043045669, -13.307581403342624]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.436256851135046, -1.9440243983115997, -1.5622477255036922, -1.6846122777693129]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.517937418024496, -2.3795986837525844, -2.1074122329438993, -2.0351720912357636]}}