{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:11:00.709193", "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-Jan-25_to_2020-Jan-28_147.0_-22.5"}, "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": 2020010000655}, "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": "January 25 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 28 2020"}, "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": 51442.567129004114}, "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": ["Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "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": -22.5}, "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": 147.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "147.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 145.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 148.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[148.177, -23.677], [148.03, -24.03], [147.5, -24.25], [147.25, -24.146], [147.0, -24.25], [146.47, -24.03], [146.25, -23.5], [146.375, -23.198], [146.25, -23.146], [146.0, -23.25], [145.75, -23.146], [145.5, -23.25], [144.97, -23.03], [144.75, -22.5], [144.97, -21.97], [145.5, -21.75], [145.75, -21.854], [146.0, -21.75], [146.25, -21.854], [146.323, -21.823], [146.354, -21.75], [146.25, -21.5], [146.47, -20.97], [147.0, -20.75], [147.25, -20.854], [147.5, -20.75], [147.75, -20.854], [148.0, -20.75], [148.53, -20.97], [148.677, -21.323], [149.03, -21.47], [149.25, -22.0], [149.146, -22.25], [149.25, -22.5], [149.03, -23.03], [148.677, -23.177], [148.53, -23.53], [148.177, -23.677]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia", "E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-01-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[146.82322330470336, -22.82322330470336], [146.96966991411009, -22.46966991411009], [147.5, -22.25], [147.75, -22.353553390593273], [148.0, -22.25], [148.53033008588991, -22.46966991411009], [148.75, -23.0], [148.53033008588991, -23.53033008588991], [148.17677669529664, -23.67677669529664], [148.03033008588991, -24.03033008588991], [147.5, -24.25], [147.25, -24.146446609406727], [147.0, -24.25], [146.46966991411009, -24.03033008588991], [146.25, -23.5], [146.46966991411009, -22.96966991411009], [146.82322330470336, -22.82322330470336]]]}, "2020-01-26T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[145.75, -23.146446609406727], [145.5, -23.25], [144.96966991411009, -23.03033008588991], [144.75, -22.5], [144.96966991411009, -21.96966991411009], [145.5, -21.75], [145.75, -21.853553390593273], [146.0, -21.75], [146.25, -21.853553390593273], [146.32322330470336, -21.82322330470336], [146.35355339059328, -21.75], [146.25, -21.5], [146.46966991411009, -20.96966991411009], [147.0, -20.75], [147.25, -20.853553390593273], [147.5, -20.75], [147.75, -20.853553390593273], [148.0, -20.75], [148.53033008588991, -20.96966991411009], [148.67677669529664, -21.32322330470336], [149.03033008588991, -21.46966991411009], [149.25, -22.0], [149.14644660940672, -22.25], [149.25, -22.5], [149.03033008588991, -23.03033008588991], [148.67677669529664, -23.17677669529664], [148.53033008588991, -23.53033008588991], [148.17677669529664, -23.67677669529664], [148.03033008588991, -24.03033008588991], [147.5, -24.25], [147.25, -24.146446609406727], [147.0, -24.25], [146.46966991411009, -24.03033008588991], [146.25, -23.5], [146.375, -23.19822330470336], [146.25, -23.146446609406727], [146.0, -23.25], [145.75, -23.146446609406727]]]}, "2020-01-27T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[145.75, -23.146446609406727], [145.5, -23.25], [144.96966991411009, -23.03033008588991], [144.75, -22.5], [144.96966991411009, -21.96966991411009], [145.5, -21.75], [145.75, -21.853553390593273], [146.0, -21.75], [146.25, -21.853553390593273], [146.32322330470336, 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -5.0367506077805615}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.346015381209054}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.57546572741734, 24.535893619693184, 24.164820890455076, 24.820562161869418]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.36196186680246, 23.688245444458175, 23.415392011196673, 24.017030052404778]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.976042052377153, -3.3168861583049565, -3.662849839043585, -3.0818153159647546]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2272212008728616, -4.201879552558523, -5.0367506077805615, -3.426690020572721]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4455783756167258, -1.6761680764823064, -1.7698673284623139, -1.4422211934481752]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5492939244393753, -2.0213815802306714, -2.250773251660946, -1.5400920974097314]}}