{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:35.912894", "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": "2015-Aug-06_to_2015-Aug-11_325.5_68.5"}, "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": 2015080000346}, "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": "August 06 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 11 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 135895.56474647432}, "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": ["Greenland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "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": ["North Atlantic Ocean"]}, "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": 68.5}, "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": 325.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "325.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 316.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 331.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 65.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 71.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-36.25, 66.0], [-36.03, 66.53], [-35.5, 66.75], [-35.25, 66.65], [-35.0, 66.75], [-34.47, 66.53], [-34.25, 66.0], [-34.47, 65.47], [-35.0, 65.25], [-35.25, 65.35], [-35.5, 65.25], [-36.03, 65.47], [-36.25, 66.0]]], [[[-43.75, 71.0], [-43.53, 71.53], [-43.0, 71.75], [-42.75, 71.65], [-42.5, 71.75], [-41.97, 71.53], [-41.82, 71.18], [-41.75, 71.15], [-41.5, 71.25], [-41.25, 71.15], [-41.0, 71.25], [-40.47, 71.03], [-40.32, 70.68], [-39.97, 70.53], [-39.82, 70.18], [-39.75, 70.15], [-39.5, 70.25], [-39.25, 70.15], [-39.0, 70.25], [-38.75, 70.15], [-38.5, 70.25], [-38.25, 70.15], [-38.0, 70.25], [-37.47, 70.03], [-37.32, 69.68], [-37.25, 69.65], [-37.0, 69.75], [-36.75, 69.65], [-36.5, 69.75], [-36.25, 69.65], [-36.0, 69.75], [-35.75, 69.65], [-35.5, 69.75], [-35.25, 69.65], [-35.0, 69.75], [-34.75, 69.65], [-34.5, 69.75], [-33.97, 69.53], [-33.82, 69.18], [-33.47, 69.03], [-33.25, 68.5], [-33.47, 67.97], [-34.0, 67.75], [-34.25, 67.85], [-34.32, 67.82], [-34.47, 67.47], [-35.0, 67.25], [-35.25, 67.35], [-35.5, 67.25], [-36.03, 67.47], [-36.18, 67.82], [-36.25, 67.85], [-36.5, 67.75], [-37.03, 67.97], [-37.18, 68.32], [-37.25, 68.35], [-37.5, 68.25], [-37.75, 68.35], [-38.0, 68.25], [-38.25, 68.35], [-38.5, 68.25], [-38.75, 68.35], [-39.0, 68.25], [-39.25, 68.35], [-39.5, 68.25], [-40.03, 68.47], [-40.18, 68.82], [-40.25, 68.85], [-40.5, 68.75], [-40.75, 68.85], [-41.0, 68.75], [-41.53, 68.97], [-41.68, 69.32], [-42.03, 69.47], [-42.18, 69.82], [-42.53, 69.97], [-42.68, 70.32], [-42.75, 70.35], [-43.0, 70.25], [-43.53, 70.47], [-43.75, 71.0]]]]}, "2015-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-33.47, 67.03], [-33.25, 66.5], [-33.47, 65.97], [-33.82, 65.82], [-33.97, 65.47], [-34.5, 65.25], [-34.75, 65.35], [-34.82, 65.32], [-34.97, 64.97], [-35.5, 64.75], [-35.75, 64.85], [-36.0, 64.75], [-36.25, 64.85], [-36.5, 64.75], [-36.75, 64.85], [-37.0, 64.75], [-37.25, 64.85], [-37.5, 64.75], [-37.75, 64.85], [-38.0, 64.75], [-38.53, 64.97], [-38.75, 65.5], [-38.53, 66.03], [-38.0, 66.25], [-37.75, 66.15], [-37.5, 66.25], [-37.25, 66.15], [-37.0, 66.25], [-36.75, 66.15], [-36.68, 66.18], [-36.53, 66.53], [-36.0, 66.75], [-35.75, 66.65], [-35.5, 66.75], [-35.25, 66.65], [-35.18, 66.68], [-35.03, 67.03], [-34.5, 67.25], [-34.25, 67.15], [-34.0, 67.25], [-33.47, 67.03]]], [[[-32.53, 68.53], [-32.0, 68.75], [-31.75, 68.65], [-31.5, 68.75], [-31.25, 68.65], [-31.0, 68.75], [-30.75, 68.65], [-30.5, 68.75], [-30.25, 68.65], [-30.0, 68.75], [-29.75, 68.65], [-29.5, 68.75], [-29.25, 68.65], [-29.0, 68.75], [-28.47, 68.53], [-28.25, 68.0], [-28.47, 67.47], [-29.0, 67.25], [-29.25, 67.35], [-29.5, 67.25], [-29.75, 67.35], [-30.0, 67.25], [-30.25, 67.35], [-30.5, 67.25], [-30.75, 67.35], [-31.0, 67.25], [-31.25, 67.35], [-31.5, 67.25], [-31.75, 67.35], [-32.0, 67.25], [-32.53, 67.47], [-32.75, 68.0], [-32.53, 68.53]]], [[[-43.53, 71.53], [-43.0, 71.75], [-42.75, 71.65], [-42.5, 71.75], [-41.97, 71.53], [-41.82, 71.18], [-41.75, 71.15], [-41.5, 71.25], [-41.25, 71.15], [-41.0, 71.25], [-40.47, 71.03], [-40.32, 70.68], [-40.0, 70.54], [-39.5, 70.75], [-38.97, 70.53], [-38.82, 70.18], [-38.75, 70.15], [-38.5, 70.25], [-38.25, 70.15], [-38.0, 70.25], [-37.47, 70.03], [-37.32, 69.68], [-37.25, 69.65], [-37.0, 69.75], [-36.75, 69.65], [-36.5, 69.75], [-36.25, 69.65], [-36.0, 69.75], [-35.75, 69.65], [-35.5, 69.75], [-35.25, 69.65], [-35.0, 69.75], [-34.75, 69.65], [-34.5, 69.75], [-34.25, 69.65], [-34.0, 69.75], [-33.47, 69.53], [-33.25, 69.0], [-33.35, 68.75], [-33.25, 68.5], [-33.47, 67.97], [-33.82, 67.82], [-33.97, 67.47], [-34.5, 67.25], [-34.75, 67.35], [-35.0, 67.25], [-35.25, 67.35], [-35.5, 67.25], [-36.03, 67.47], [-36.18, 67.82], [-36.25, 67.85], [-36.5, 67.75], [-37.03, 67.97], [-37.18, 68.32], [-37.25, 68.35], [-37.5, 68.25], [-37.75, 68.35], [-38.0, 68.25], [-38.25, 68.35], [-38.5, 68.25], [-38.75, 68.35], [-39.0, 68.25], [-39.25, 68.35], [-39.5, 68.25], [-40.03, 68.47], [-40.18, 68.82], [-40.25, 68.85], [-40.5, 68.75], [-40.75, 68.85], [-41.0, 68.75], [-41.53, 68.97], [-41.68, 69.32], [-42.03, 69.47], [-42.18, 69.82], [-42.53, 69.97], [-42.68, 70.32], [-42.75, 70.35], [-43.0, 70.25], [-43.53, 70.47], [-43.75, 71.0], [-43.53, 71.53]]]]}, "2015-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.53, 70.47], [-43.75, 71.0], [-43.53, 71.53], [-43.0, 71.75], [-42.75, 71.65], [-42.5, 71.75], [-41.97, 71.53], [-41.82, 71.18], [-41.75, 71.15], [-41.5, 71.25], [-41.25, 71.15], [-41.0, 71.25], [-40.47, 71.03], [-40.32, 70.68], [-40.0, 70.54], [-39.68, 70.68], [-39.53, 71.03], [-39.0, 71.25], [-38.75, 71.15], [-38.5, 71.25], [-38.25, 71.15], [-38.0, 71.25], [-37.47, 71.03], [-37.32, 70.68], [-36.97, 70.53], [-36.82, 70.18], [-36.75, 70.15], [-36.5, 70.25], [-35.97, 70.03], [-35.82, 69.68], [-35.75, 69.65], [-35.5, 69.75], [-35.25, 69.65], [-35.0, 69.75], [-34.75, 69.65], [-34.5, 69.75], [-34.25, 69.65], [-34.0, 69.75], [-33.75, 69.65], [-33.5, 69.75], [-33.0, 69.54], [-32.5, 69.75], [-32.25, 69.65], [-32.0, 69.75], [-31.75, 69.65], [-31.5, 69.75], [-30.97, 69.53], [-30.75, 69.0], [-30.85, 68.75], [-30.82, 68.68], [-30.75, 68.65], [-30.5, 68.75], [-30.25, 68.65], [-30.0, 68.75], [-29.75, 68.65], [-29.5, 68.75], [-29.25, 68.65], [-29.0, 68.75], [-28.47, 68.53], [-28.25, 68.0], [-28.47, 67.47], [-29.0, 67.25], [-29.25, 67.35], [-29.5, 67.25], [-29.75, 67.35], [-30.0, 67.25], [-30.25, 67.35], [-30.5, 67.25], [-30.75, 67.35], [-31.0, 67.25], [-31.25, 67.35], [-31.5, 67.25], [-31.75, 67.35], [-32.0, 67.25], [-32.25, 67.35], [-32.5, 67.25], [-32.75, 67.35], [-32.82, 67.32], [-32.87, 67.2], [-32.47, 67.03], [-32.25, 66.5], [-32.47, 65.97], [-32.82, 65.82], [-32.97, 65.47], [-33.5, 65.25], [-33.75, 65.35], [-34.0, 65.25], [-34.25, 65.35], [-34.32, 65.32], [-34.47, 64.97], [-35.0, 64.75], [-35.25, 64.85], [-35.5, 64.75], [-35.75, 64.85], [-36.0, 64.75], [-36.25, 64.85], [-36.5, 64.75], [-36.75, 64.85], [-37.0, 64.75], [-37.25, 64.85], [-37.5, 64.75], [-37.75, 64.85], [-38.0, 64.75], [-38.53, 64.97], [-38.75, 65.5], [-38.53, 66.03], [-38.12, 66.2], [-38.18, 66.32], [-38.25, 66.35], [-38.5, 66.25], [-38.75, 66.35], [-39.0, 66.25], [-39.53, 66.47], [-39.75, 67.0], [-39.53, 67.53], [-39.18, 67.68], [-39.15, 67.75], [-39.25, 68.0], [-39.12, 68.3], [-39.25, 68.35], [-39.5, 68.25], [-40.03, 68.47], [-40.18, 68.82], [-40.25, 68.85], [-40.5, 68.75], [-40.75, 68.85], [-41.0, 68.75], [-41.53, 68.97], [-41.68, 69.32], [-42.03, 69.47], [-42.18, 69.82], [-42.53, 69.97], [-42.68, 70.32], [-42.75, 70.35], [-43.0, 70.25], [-43.53, 70.47]], [[-36.32, 66.68], [-36.25, 66.65], [-36.18, 66.68], [-36.12, 66.8], [-36.25, 66.85], [-36.37, 66.8], [-36.32, 66.68]]]]}, "2015-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-40.25, 70.0], [-40.03, 70.53], [-39.68, 70.68], [-39.53, 71.03], [-39.0, 71.25], [-38.75, 71.15], [-38.5, 71.25], [-38.25, 71.15], [-38.0, 71.25], [-37.47, 71.03], [-37.32, 70.68], [-36.97, 70.53], [-36.82, 70.18], [-36.75, 70.15], [-36.5, 70.25], [-35.97, 70.03], [-35.82, 69.68], [-35.75, 69.65], [-35.5, 69.75], [-35.25, 69.65], [-35.0, 69.75], [-34.75, 69.65], [-34.5, 69.75], [-34.25, 69.65], [-34.0, 69.75], [-33.75, 69.65], [-33.5, 69.75], [-33.0, 69.54], [-32.5, 69.75], [-32.25, 69.65], [-32.0, 69.75], [-31.75, 69.65], [-31.5, 69.75], [-30.97, 69.53], [-30.75, 69.0], [-30.85, 68.75], [-30.82, 68.68], [-30.75, 68.65], [-30.5, 68.75], [-30.25, 68.65], [-30.0, 68.75], [-29.75, 68.65], [-29.5, 68.75], [-29.25, 68.65], [-29.0, 68.75], [-28.47, 68.53], [-28.25, 68.0], [-28.47, 67.47], [-29.0, 67.25], [-29.25, 67.35], [-29.5, 67.25], [-29.75, 67.35], [-30.0, 67.25], [-30.25, 67.35], [-30.5, 67.25], [-30.75, 67.35], [-31.0, 67.25], [-31.25, 67.35], [-31.5, 67.25], [-31.75, 67.35], [-32.0, 67.25], [-32.25, 67.35], [-32.5, 67.25], [-32.75, 67.35], [-32.82, 67.32], [-32.87, 67.2], [-32.47, 67.03], [-32.25, 66.5], [-32.47, 65.97], [-32.82, 65.82], [-32.97, 65.47], [-33.5, 65.25], [-33.75, 65.35], [-34.0, 65.25], [-34.25, 65.35], [-34.32, 65.32], [-34.47, 64.97], [-35.0, 64.75], [-35.25, 64.85], [-35.5, 64.75], [-35.75, 64.85], [-36.0, 64.75], [-36.25, 64.85], [-36.5, 64.75], [-36.75, 64.85], [-37.0, 64.75], [-37.25, 64.85], [-37.5, 64.75], [-37.75, 64.85], [-38.0, 64.75], [-38.53, 64.97], [-38.75, 65.5], [-38.53, 66.03], [-38.12, 66.2], [-38.18, 66.32], [-38.25, 66.35], [-38.5, 66.25], [-38.75, 66.35], [-39.0, 66.25], [-39.53, 66.47], [-39.75, 67.0], [-39.53, 67.53], [-39.18, 67.68], [-39.15, 67.75], [-39.25, 68.0], [-39.04, 68.5], [-39.18, 68.82], [-39.53, 68.97], [-39.68, 69.32], [-40.03, 69.47], [-40.25, 70.0]]]]}, "2015-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.53, 71.03], [-39.0, 71.25], [-38.75, 71.15], [-38.5, 71.25], [-38.25, 71.15], [-38.0, 71.25], [-37.47, 71.03], [-37.32, 70.68], [-36.97, 70.53], [-36.82, 70.18], [-36.75, 70.15], [-36.5, 70.25], [-35.97, 70.03], [-35.82, 69.68], [-35.75, 69.65], [-35.5, 69.75], [-35.25, 69.65], [-35.0, 69.75], [-34.75, 69.65], [-34.5, 69.75], [-34.25, 69.65], [-34.0, 69.75], [-33.75, 69.65], [-33.5, 69.75], [-33.0, 69.54], [-32.5, 69.75], [-32.25, 69.65], [-32.0, 69.75], [-31.75, 69.65], [-31.5, 69.75], [-30.97, 69.53], [-30.75, 69.0], [-30.85, 68.75], [-30.75, 68.5], [-30.97, 67.97], [-31.5, 67.75], [-31.8, 67.88], [-31.97, 67.47], [-32.5, 67.25], [-32.75, 67.35], [-32.82, 67.32], [-32.87, 67.2], [-32.47, 67.03], [-32.25, 66.5], [-32.47, 65.97], [-32.82, 65.82], [-32.97, 65.47], [-33.5, 65.25], [-33.75, 65.35], [-34.0, 65.25], [-34.25, 65.35], [-34.32, 65.32], [-34.47, 64.97], [-35.0, 64.75], [-35.25, 64.85], [-35.5, 64.75], [-35.75, 64.85], [-36.0, 64.75], [-36.25, 64.85], [-36.5, 64.75], [-36.75, 64.85], [-37.0, 64.75], [-37.25, 64.85], [-37.5, 64.75], [-38.03, 64.97], [-38.25, 65.5], [-38.04, 66.0], [-38.18, 66.32], [-38.25, 66.35], [-38.5, 66.25], [-38.75, 66.35], [-39.0, 66.25], [-39.53, 66.47], [-39.75, 67.0], [-39.53, 67.53], [-39.18, 67.68], [-39.15, 67.75], [-39.25, 68.0], [-39.03, 68.53], [-38.68, 68.68], [-38.65, 68.75], [-38.68, 68.82], [-39.03, 68.97], [-39.18, 69.32], [-39.53, 69.47], [-39.75, 70.0], [-39.65, 70.25], [-39.75, 70.5], [-39.53, 71.03]]]]}, "2015-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.03, 68.03], [-38.68, 68.18], [-38.53, 68.53], [-38.18, 68.68], [-38.03, 69.03], [-37.5, 69.25], [-37.25, 69.15], [-37.0, 69.25], [-36.47, 69.03], [-36.32, 68.68], [-36.25, 68.65], [-36.0, 68.75], [-35.75, 68.65], [-35.5, 68.75], [-35.25, 68.65], [-35.18, 68.68], [-35.03, 69.03], [-34.5, 69.25], [-34.25, 69.15], [-34.0, 69.25], [-33.75, 69.15], [-33.5, 69.25], [-33.25, 69.15], [-33.0, 69.25], [-32.47, 69.03], [-32.32, 68.68], [-31.97, 68.53], [-31.75, 68.0], [-31.97, 67.47], [-32.5, 67.25], [-32.75, 67.35], [-33.0, 67.25], [-33.25, 67.35], [-33.32, 67.32], [-33.35, 67.25], [-33.25, 67.0], [-33.47, 66.47], [-34.0, 66.25], [-34.25, 66.35], [-34.32, 66.32], [-34.47, 65.97], [-35.0, 65.75], [-35.53, 65.97], [-35.68, 66.32], [-35.75, 66.35], [-36.0, 66.25], [-36.25, 66.35], [-36.32, 66.32], [-36.47, 65.97], [-37.0, 65.75], [-37.25, 65.85], [-37.5, 65.75], [-38.03, 65.97], [-38.18, 66.32], [-38.25, 66.35], [-38.5, 66.25], [-39.03, 66.47], [-39.25, 67.0], [-39.15, 67.25], [-39.25, 67.5], [-39.03, 68.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.916313397317168}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.6621777877322215}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-15.245415319212213, -9.790662885034465, -10.335704850159402, -9.26801436798496, -9.957550700670708, -9.96745031442299]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-19.200717633215845, -18.61505258676104, -19.985824011694007, -20.104868438542695, -19.589121034335818, -17.41555423510428]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.471632530327485, -4.3210371323695735, -4.8243753982228075, -4.558436387576683, -4.692748511697236, -4.164158379655954]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.427515198468569, -6.494316054721509, -7.916313397317168, -6.851946496107331, -7.336677918876916, -6.285513623179639]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.801862610547154, -1.6884695454462775, -1.9101609070205376, -1.8962163029269905, -1.8951281350903366, -1.6235081066409822]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.512785318660465, -2.1999758273842285, -2.568905863339385, -2.4130984498735204, -2.3441676752377396, -2.189060026333207]}}