{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:52.160560", "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": "2013-Jul-19_to_2013-Jul-22_254.5_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": 2013070001072}, "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 19 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 22 2013"}, "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": 59030.41874843174}, "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": 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": 254.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "254.5\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": 258.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.75, 56.0], [-107.53, 56.53], [-107.0, 56.75], [-106.47, 56.53], [-106.32, 56.18], [-106.25, 56.15], [-106.0, 56.25], [-105.75, 56.15], [-105.68, 56.18], [-105.53, 56.53], [-105.0, 56.75], [-104.75, 56.65], [-104.5, 56.75], [-104.25, 56.65], [-104.0, 56.75], [-103.47, 56.53], [-103.32, 56.18], [-102.97, 56.03], [-102.75, 55.5], [-102.85, 55.25], [-102.75, 55.0], [-102.85, 54.75], [-102.8, 54.62], [-102.5, 54.75], [-102.0, 54.54], [-101.5, 54.75], [-100.97, 54.53], [-100.75, 54.0], [-100.97, 53.47], [-101.5, 53.25], [-102.0, 53.46], [-102.5, 53.25], [-103.03, 53.47], [-103.2, 53.88], [-103.5, 53.75], [-104.03, 53.97], [-104.18, 54.32], [-104.25, 54.35], [-104.5, 54.25], [-104.75, 54.35], [-105.0, 54.25], [-105.53, 54.47], [-105.68, 54.82], [-105.75, 54.85], [-106.0, 54.75], [-106.25, 54.85], [-106.5, 54.75], [-107.03, 54.97], [-107.18, 55.32], [-107.53, 55.47], [-107.75, 56.0]]]]}, "2013-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.75, 56.0], [-107.53, 56.53], [-107.0, 56.75], [-106.47, 56.53], [-106.32, 56.18], [-106.25, 56.15], [-106.0, 56.25], [-105.75, 56.15], [-105.68, 56.18], [-105.53, 56.53], [-105.0, 56.75], [-104.75, 56.65], [-104.5, 56.75], [-104.25, 56.65], [-104.0, 56.75], [-103.47, 56.53], [-103.32, 56.18], [-102.97, 56.03], [-102.75, 55.5], [-102.85, 55.25], [-102.75, 55.0], [-102.85, 54.75], [-102.8, 54.62], [-102.5, 54.75], [-102.25, 54.65], [-102.0, 54.75], [-101.75, 54.65], [-101.5, 54.75], [-100.97, 54.53], [-100.75, 54.0], [-100.97, 53.47], [-101.5, 53.25], [-101.75, 53.35], [-102.0, 53.25], [-102.25, 53.35], [-102.32, 53.32], [-102.47, 52.97], [-103.0, 52.75], [-103.25, 52.85], [-103.5, 52.75], [-104.0, 52.96], [-104.5, 52.75], [-104.75, 52.85], [-105.0, 52.75], [-105.25, 52.85], [-105.5, 52.75], [-105.75, 52.85], [-106.0, 52.75], [-106.53, 52.97], [-106.75, 53.5], [-106.65, 53.75], [-106.75, 54.0], [-106.53, 54.53], [-106.18, 54.68], [-106.12, 54.8], [-106.25, 54.85], [-106.5, 54.75], [-107.03, 54.97], [-107.18, 55.32], [-107.53, 55.47], [-107.75, 56.0]]]]}, "2013-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.75, 56.0], [-107.53, 56.53], [-107.0, 56.75], [-106.47, 56.53], [-106.32, 56.18], [-106.25, 56.15], [-106.0, 56.25], [-105.75, 56.15], [-105.68, 56.18], [-105.53, 56.53], [-105.0, 56.75], [-104.75, 56.65], [-104.5, 56.75], [-104.25, 56.65], [-104.0, 56.75], [-103.47, 56.53], [-103.32, 56.18], [-102.97, 56.03], [-102.75, 55.5], [-102.85, 55.25], [-102.75, 55.0], [-102.85, 54.75], [-102.8, 54.62], [-102.5, 54.75], [-102.25, 54.65], [-102.0, 54.75], [-101.75, 54.65], [-101.5, 54.75], [-100.97, 54.53], [-100.75, 54.0], [-100.97, 53.47], [-101.5, 53.25], [-101.75, 53.35], [-102.0, 53.25], [-102.25, 53.35], [-102.32, 53.32], [-102.47, 52.97], [-103.0, 52.75], [-103.25, 52.85], [-103.5, 52.75], [-104.0, 52.96], [-104.5, 52.75], [-104.75, 52.85], [-105.0, 52.75], [-105.25, 52.85], [-105.5, 52.75], [-105.75, 52.85], [-106.0, 52.75], [-106.53, 52.97], [-106.75, 53.5], [-106.65, 53.75], [-106.75, 54.0], [-106.53, 54.53], [-106.18, 54.68], [-106.12, 54.8], [-106.25, 54.85], [-106.5, 54.75], [-107.03, 54.97], [-107.18, 55.32], [-107.53, 55.47], [-107.75, 56.0]]]]}, "2013-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.53, 54.53], [-106.18, 54.68], [-106.03, 55.03], [-105.5, 55.25], [-105.25, 55.15], [-105.0, 55.25], [-104.47, 55.03], [-104.32, 54.68], [-104.25, 54.65], [-104.0, 54.75], [-103.75, 54.65], [-103.5, 54.75], [-102.97, 54.53], [-102.82, 54.18], [-102.7, 54.12], [-102.53, 54.53], [-102.0, 54.75], [-101.47, 54.53], [-101.25, 54.0], [-101.47, 53.47], [-102.0, 53.25], [-102.3, 53.38], [-102.47, 52.97], [-103.0, 52.75], [-103.25, 52.85], [-103.5, 52.75], [-104.0, 52.96], [-104.5, 52.75], [-104.75, 52.85], [-105.0, 52.75], [-105.25, 52.85], [-105.5, 52.75], [-105.75, 52.85], [-106.0, 52.75], [-106.53, 52.97], [-106.75, 53.5], [-106.65, 53.75], [-106.75, 54.0], [-106.53, 54.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.766398084765854}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.267844433442282}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.414530635696849, 12.47659973528448, 13.818037070169396, 14.060692913162484]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.004460181652632, 11.221704364779896, 12.05641622610807, 13.109817054424184]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.336972006088195, -5.260895728326113, -4.041019272888474, -3.699193850741138]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.817771967921658, -5.766398084765854, -5.150018429019099, -4.1024304804425356]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.350996534081523, -2.045017905616756, -1.520380496076952, -1.3798028490536935]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5087041576089026, -2.2158488810514188, -1.842272291792307, -1.5585090847249967]}}