{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:11:23.036344", "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": "2020-Feb-21_to_2020-Feb-23_135.0_-65.0"}, "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": 2020020000661}, "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": "February 21 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 23 2020"}, "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": 51468.87199759249}, "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": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": ["Southern 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": -65.0}, "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": 135.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "135.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 130.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 139.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -66.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -65.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[129.25, -65.0], [129.47, -64.47], [130.0, -64.25], [130.25, -64.354], [130.5, -64.25], [130.75, -64.354], [131.0, -64.25], [131.25, -64.354], [131.5, -64.25], [131.75, -64.354], [132.0, -64.25], [132.25, -64.354], [132.5, -64.25], [132.75, -64.354], [133.0, -64.25], [133.25, -64.354], [133.5, -64.25], [133.75, -64.354], [134.0, -64.25], [134.25, -64.354], [134.5, -64.25], [134.75, -64.354], [135.0, -64.25], [135.25, -64.354], [135.5, -64.25], [135.75, -64.354], [136.0, -64.25], [136.25, -64.354], [136.5, -64.25], [136.75, -64.354], [137.0, -64.25], [137.25, -64.354], [137.5, -64.25], [137.75, -64.354], [138.0, -64.25], [138.53, -64.47], [138.75, -65.0], [138.646, -65.25], [138.677, -65.323], [138.75, -65.354], [139.0, -65.25], [139.53, -65.47], [139.75, -66.0], [139.646, -66.25], [139.75, -66.5], [139.53, -67.03], [139.0, -67.25], [138.75, -67.146], [138.5, -67.25], [137.97, -67.03], [137.823, -66.677], [137.75, -66.646], [137.5, -66.75], [137.25, -66.646], [137.0, -66.75], [136.47, -66.53], [136.323, -66.177], [136.25, -66.146], [136.0, -66.25], [135.75, -66.146], [135.5, -66.25], [135.25, -66.146], [135.0, -66.25], [134.75, -66.146], [134.5, -66.25], [134.25, -66.146], [134.0, -66.25], [133.75, -66.146], [133.5, -66.25], [133.25, -66.146], [133.0, -66.25], [132.75, -66.146], [132.5, -66.25], [132.25, -66.146], [132.0, -66.25], [131.75, -66.146], [131.5, -66.25], [131.25, -66.146], [131.0, -66.25], [130.75, -66.146], [130.5, -66.25], [129.97, -66.03], [129.823, -65.677], [129.47, -65.53], [129.25, -65.0]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-02-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[129.82322330470336, -65.67677669529664], [129.46966991411009, -65.53033008588991], [129.25, -65.0], [129.46966991411009, -64.46966991411009], [130.0, -64.25], [130.25, -64.35355339059328], [130.5, -64.25], [130.75, -64.35355339059328], [131.0, -64.25], [131.25, -64.35355339059328], [131.5, -64.25], [131.75, -64.35355339059328], [132.0, -64.25], [132.25, -64.35355339059328], [132.5, -64.25], [132.75, -64.35355339059328], [133.0, -64.25], [133.25, -64.35355339059328], [133.5, -64.25], [133.75, -64.35355339059328], [134.0, -64.25], [134.25, -64.35355339059328], [134.5, -64.25], [134.75, -64.35355339059328], [135.0, -64.25], [135.25, -64.35355339059328], [135.5, -64.25], [135.75, -64.35355339059328], [136.0, -64.25], [136.25, -64.35355339059328], [136.5, -64.25], [136.75, -64.35355339059328], [137.0, -64.25], [137.25, -64.35355339059328], [137.5, -64.25], [137.75, -64.35355339059328], [138.0, -64.25], [138.53033008588991, -64.46966991411009], [138.75, -65.0], [138.64644660940672, -65.25], [138.67677669529664, -65.32322330470336], [138.75, -65.35355339059328], [139.0, -65.25], [139.53033008588991, -65.46966991411009], [139.75, -66.0], [139.64644660940672, -66.25], [139.75, -66.5], [139.53033008588991, -67.03033008588991], [139.0, -67.25], [138.75, -67.14644660940672], [138.5, -67.25], [137.96966991411009, -67.03033008588991], [137.82322330470336, -66.67677669529664], [137.75, -66.64644660940672], [137.5, -66.75], [137.25, -66.64644660940672], [137.0, -66.75], [136.46966991411009, -66.53033008588991], [136.32322330470336, -66.17677669529664], [136.25, -66.14644660940672], [136.0, -66.25], [135.75, -66.14644660940672], [135.5, -66.25], [135.25, -66.14644660940672], [135.0, -66.25], [134.75, -66.14644660940672], [134.5, -66.25], [134.25, -66.14644660940672], [134.0, -66.25], [133.75, -66.14644660940672], [133.5, -66.25], [133.25, -66.14644660940672], [133.0, -66.25], [132.75, -66.14644660940672], [132.5, -66.25], [132.25, -66.14644660940672], [132.0, -66.25], [131.75, -66.14644660940672], [131.5, -66.25], [131.25, -66.14644660940672], [131.0, -66.25], [130.75, -66.14644660940672], [130.5, -66.25], [129.96966991411009, -66.03033008588991], [129.82322330470336, -65.67677669529664]]]}, "2020-02-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[129.82322330470336, -65.67677669529664], [129.46966991411009, -65.53033008588991], [129.25, -65.0], [129.46966991411009, -64.46966991411009], [130.0, -64.25], [130.25, -64.35355339059328], [130.5, -64.25], [130.75, -64.35355339059328], [131.0, -64.25], [131.25, -64.35355339059328], [131.5, -64.25], [131.75, -64.35355339059328], [132.0, -64.25], [132.25, -64.35355339059328], [132.5, -64.25], [132.75, -64.35355339059328], [133.0, -64.25], [133.25, -64.35355339059328], [133.5, -64.25], [133.75, -64.35355339059328], [134.0, -64.25], [134.25, -64.35355339059328], [134.5, -64.25], [134.75, -64.35355339059328], [135.0, -64.25], [135.25, -64.35355339059328], [135.5, -64.25], [135.75, -64.35355339059328], [136.0, -64.25], [136.25, -64.35355339059328], [136.5, -64.25], [136.75, -64.35355339059328], [137.0, -64.25], [137.25, -64.35355339059328], [137.5, -64.25], [137.75, -64.35355339059328], [138.0, -64.25], [138.53033008588991, -64.46966991411009], [138.75, -65.0], [138.64644660940672, -65.25], [138.67677669529664, -65.32322330470336], [138.75, -65.35355339059328], [139.0, -65.25], [139.53033008588991, -65.46966991411009], [139.75, -66.0], [139.64644660940672, -66.25], [139.75, -66.5], [139.53033008588991, -67.03033008588991], [139.0, -67.25], [138.75, -67.14644660940672], [138.5, -67.25], [137.96966991411009, -67.03033008588991], [137.82322330470336, -66.67677669529664], [137.75, -66.64644660940672], [137.5, -66.75], [137.25, -66.64644660940672], [137.0, -66.75], [136.46966991411009, -66.53033008588991], [136.32322330470336, -66.17677669529664], [136.25, -66.14644660940672], [136.0, -66.25], [135.75, -66.14644660940672], [135.5, -66.25], [135.25, -66.14644660940672], [135.0, -66.25], [134.75, -66.14644660940672], [134.5, -66.25], [134.25, -66.14644660940672], [134.0, -66.25], [133.75, -66.14644660940672], [133.5, -66.25], [133.25, -66.14644660940672], [133.0, -66.25], [132.75, -66.14644660940672], [132.5, -66.25], [132.25, -66.14644660940672], [132.0, -66.25], [131.75, -66.14644660940672], [131.5, -66.25], [131.25, -66.14644660940672], [131.0, -66.25], [130.75, -66.14644660940672], [130.5, -66.25], [129.96966991411009, -66.03033008588991], [129.82322330470336, -65.67677669529664]]]}, "2020-02-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[129.82322330470336, -65.67677669529664], [129.46966991411009, -65.53033008588991], [129.25, -65.0], [129.46966991411009, -64.46966991411009], [130.0, -64.25], [130.25, -64.35355339059328], [130.5, -64.25], [130.75, -64.35355339059328], [131.0, -64.25], [131.25, -64.35355339059328], [131.5, -64.25], [131.75, -64.35355339059328], [132.0, -64.25], [132.25, -64.35355339059328], [132.5, -64.25], [132.75, -64.35355339059328], [133.0, -64.25], [133.25, -64.35355339059328], [133.5, -64.25], [133.75, -64.35355339059328], [134.0, -64.25], [134.25, -64.35355339059328], [134.5, -64.25], [134.75, -64.35355339059328], [135.0, -64.25], [135.25, -64.35355339059328], [135.5, -64.25], [135.75, -64.35355339059328], [136.0, -64.25], [136.25, -64.35355339059328], [136.5, -64.25], [136.75, -64.35355339059328], [137.0, -64.25], [137.25, -64.35355339059328], [137.5, -64.25], [137.75, -64.35355339059328], [138.0, -64.25], [138.53033008588991, -64.46966991411009], [138.75, -65.0], [138.64644660940672, -65.25], [138.67677669529664, -65.32322330470336], [138.75, -65.35355339059328], [139.0, -65.25], [139.53033008588991, -65.46966991411009], [139.75, -66.0], [139.64644660940672, -66.25], [139.75, -66.5], [139.53033008588991, -67.03033008588991], [139.0, -67.25], [138.75, -67.14644660940672], [138.5, -67.25], [137.96966991411009, -67.03033008588991], [137.82322330470336, -66.67677669529664], [137.75, -66.64644660940672], [137.5, -66.75], [137.25, -66.64644660940672], [137.0, -66.75], [136.46966991411009, -66.53033008588991], [136.32322330470336, -66.17677669529664], [136.25, -66.14644660940672], [136.0, -66.25], [135.75, -66.14644660940672], [135.5, -66.25], [135.25, -66.14644660940672], [135.0, -66.25], [134.75, -66.14644660940672], [134.5, -66.25], [134.25, -66.14644660940672], [134.0, -66.25], [133.75, -66.14644660940672], [133.5, -66.25], [133.25, -66.14644660940672], [133.0, -66.25], [132.75, -66.14644660940672], [132.5, -66.25], [132.25, -66.14644660940672], [132.0, -66.25], [131.75, -66.14644660940672], [131.5, -66.25], [131.25, -66.14644660940672], [131.0, -66.25], [130.75, -66.14644660940672], [130.5, -66.25], [129.96966991411009, -66.03033008588991], [129.82322330470336, -65.67677669529664]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.478645933615951}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0045205261489674}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-5.597955777456491, -5.406410242234017, -5.5729962004907065]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.795320784732155, -9.55465247754222, -8.917023382692832]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1410647031223986, -2.8931326648214535, -2.97936421050305]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.066041406929628, -4.478645933615951, -3.940638850791288]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.86929002845694, -1.7220584504532497, -1.8577558035971946]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.20147894392764, -2.063137568736021, -2.5860384064332953]}}