{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:21:50.399067", "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": "2021-Jan-20_to_2021-Jan-25_153.0_-23.0"}, "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": 2021010000790}, "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 20 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 25 2021"}, "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": 99869.41602284252}, "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": ["Coral Sea"]}, "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": -23.0}, "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": 153.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "153.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 150.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 156.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.5}, "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": [[[154.0, -25.25], [153.47, -25.03], [153.25, -24.5], [153.375, -24.198], [153.0, -24.043], [152.5, -24.25], [151.97, -24.03], [151.823, -23.677], [151.47, -23.53], [151.323, -23.177], [150.97, -23.03], [150.823, -22.677], [150.47, -22.53], [150.323, -22.177], [149.97, -22.03], [149.75, -21.5], [149.97, -20.97], [150.5, -20.75], [150.75, -20.854], [151.0, -20.75], [151.25, -20.854], [151.5, -20.75], [151.75, -20.854], [152.0, -20.75], [152.25, -20.854], [152.5, -20.75], [152.75, -20.854], [153.0, -20.75], [153.25, -20.854], [153.5, -20.75], [154.03, -20.97], [154.177, -21.323], [154.53, -21.47], [154.75, -22.0], [154.646, -22.25], [154.677, -22.323], [155.03, -22.47], [155.177, -22.823], [155.25, -22.854], [155.5, -22.75], [156.03, -22.97], [156.177, -23.323], [156.53, -23.47], [156.75, -24.0], [156.53, -24.53], [156.0, -24.75], [155.47, -24.53], [155.323, -24.177], [155.25, -24.146], [155.177, -24.177], [155.03, -24.53], [154.677, -24.677], [154.53, -25.03], [154.0, -25.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Australia", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[153.25, -24.5], [153.46966991411009, -23.96966991411009], [154.0, -23.75], [154.53033008588991, -23.96966991411009], [154.75, -24.5], [154.53033008588991, -25.03033008588991], [154.0, -25.25], [153.46966991411009, -25.03033008588991], [153.25, -24.5]]]}, "2021-01-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[150.85355339059328, -22.25], [150.75, -22.0], [150.96966991411009, -21.46966991411009], [151.5, -21.25], [151.75, -21.353553390593273], [152.0, -21.25], [152.53033008588991, -21.46966991411009], [152.67677669529664, -21.82322330470336], [152.75, -21.853553390593273], [153.0, -21.75], [153.25, -21.853553390593273], [153.5, -21.75], [154.03033008588991, -21.96966991411009], [154.17677669529664, -22.32322330470336], [154.25, -22.353553390593273], [154.5, -22.25], [155.03033008588991, -22.46966991411009], [155.17677669529664, -22.82322330470336], [155.25, -22.853553390593273], [155.5, -22.75], [156.03033008588991, -22.96966991411009], [156.17677669529664, -23.32322330470336], [156.53033008588991, -23.46966991411009], [156.75, -24.0], [156.53033008588991, -24.53033008588991], [156.0, -24.75], [155.46966991411009, -24.53033008588991], [155.32322330470336, -24.17677669529664], [155.25, -24.146446609406727], [155.17677669529664, -24.17677669529664], [155.03033008588991, -24.53033008588991], [154.67677669529664, -24.67677669529664], [154.53033008588991, -25.03033008588991], [154.0, -25.25], [153.46966991411009, -25.03033008588991], [153.25, -24.5], [153.375, -24.19822330470336], [152.96966991411009, -24.03033008588991], [152.82322330470336, -23.67677669529664], [152.75, -23.646446609406727], [152.5, -23.75], [151.96966991411009, -23.53033008588991], [151.82322330470336, -23.17677669529664], [151.75, -23.146446609406727], [151.5, -23.25], [150.96966991411009, -23.03033008588991], [150.75, -22.5], [150.85355339059328, -22.25]]]}, "2021-01-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[150.85355339059328, -22.25], [150.75, -22.0], [150.96966991411009, -21.46966991411009], [151.5, -21.25], [151.75, -21.353553390593273], [152.0, -21.25], [152.53033008588991, -21.46966991411009], [152.67677669529664, -21.82322330470336], [152.75, -21.853553390593273], [153.0, -21.75], [153.25, -21.853553390593273], [153.5, -21.75], [154.03033008588991, -21.96966991411009], [154.17677669529664, -22.32322330470336], [154.25, -22.353553390593273], [154.5, -22.25], [155.03033008588991, -22.46966991411009], [155.17677669529664, -22.82322330470336], [155.25, -22.853553390593273], [155.5, -22.75], [156.03033008588991, -22.96966991411009], [156.17677669529664, -23.32322330470336], [156.53033008588991, -23.46966991411009], [156.75, -24.0], [156.53033008588991, -24.53033008588991], [156.0, -24.75], [155.46966991411009, -24.53033008588991], [155.32322330470336, -24.17677669529664], [155.25, -24.146446609406727], [155.17677669529664, -24.17677669529664], [155.03033008588991, -24.53033008588991], [154.67677669529664, -24.67677669529664], [154.53033008588991, -25.03033008588991], [154.0, -25.25], [153.46966991411009, -25.03033008588991], [153.25, -24.5], [153.375, -24.19822330470336], [152.96966991411009, -24.03033008588991], [152.82322330470336, -23.67677669529664], [152.75, -23.646446609406727], [152.5, -23.75], [151.96966991411009, -23.53033008588991], [151.82322330470336, -23.17677669529664], [151.75, -23.146446609406727], [151.5, -23.25], [150.96966991411009, -23.03033008588991], [150.75, -22.5], [150.85355339059328, -22.25]]]}, "2021-01-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[150.32322330470336, -22.17677669529664], [149.96966991411009, -22.03033008588991], [149.75, -21.5], [149.96966991411009, -20.96966991411009], [150.5, -20.75], [150.75, -20.853553390593273], [151.0, -20.75], [151.25, -20.853553390593273], [151.5, -20.75], [151.75, -20.853553390593273], [152.0, -20.75], [152.25, -20.853553390593273], [152.5, -20.75], [152.75, -20.853553390593273], [153.0, -20.75], [153.25, -20.853553390593273], [153.5, -20.75], [154.03033008588991, -20.96966991411009], [154.17677669529664, -21.32322330470336], [154.53033008588991, -21.46966991411009], [154.75, -22.0], [154.64644660940672, -22.25], [154.67677669529664, -22.32322330470336], [155.03033008588991, -22.46966991411009], [155.17677669529664, -22.82322330470336], [155.25, -22.853553390593273], [155.5, -22.75], [156.03033008588991, -22.96966991411009], [156.17677669529664, -23.32322330470336], [156.53033008588991, -23.46966991411009], [156.75, -24.0], [156.53033008588991, -24.53033008588991], [156.0, -24.75], [155.46966991411009, -24.53033008588991], [155.32322330470336, -24.17677669529664], [155.25, -24.146446609406727], [155.17677669529664, -24.17677669529664], [155.03033008588991, -24.53033008588991], [154.5, -24.75], [153.96966991411009, -24.53033008588991], [153.82322330470336, -24.17677669529664], [153.75, -24.146446609406727], [153.5, -24.25], [153.0, -24.042893218813454], [152.5, -24.25], [151.96966991411009, -24.03033008588991], [151.82322330470336, -23.67677669529664], [151.46966991411009, -23.53033008588991], [151.32322330470336, -23.17677669529664], [150.96966991411009, -23.03033008588991], [150.82322330470336, -22.67677669529664], [150.46966991411009, -22.53033008588991], [150.32322330470336, -22.17677669529664]]]}, "2021-01-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[150.32322330470336, -22.17677669529664], [149.96966991411009, -22.03033008588991], [149.75, -21.5], [149.96966991411009, -20.96966991411009], [150.5, -20.75], [150.75, -20.853553390593273], [151.0, -20.75], [151.25, -20.853553390593273], [151.5, -20.75], [151.75, -20.853553390593273], [152.0, -20.75], [152.25, -20.853553390593273], [152.5, -20.75], [152.75, -20.853553390593273], [153.0, -20.75], [153.25, -20.853553390593273], [153.5, -20.75], [154.03033008588991, -20.96966991411009], [154.17677669529664, -21.32322330470336], [154.53033008588991, -21.46966991411009], [154.75, -22.0], [154.64644660940672, -22.25], [154.67677669529664, -22.32322330470336], [155.03033008588991, -22.46966991411009], [155.25, -23.0], [155.03033008588991, -23.53033008588991], [154.67677669529664, -23.67677669529664], [154.53033008588991, -24.03033008588991], [154.0, -24.25], [153.75, -24.146446609406727], [153.5, -24.25], [153.0, -24.042893218813454], [152.5, -24.25], [151.96966991411009, -24.03033008588991], [151.82322330470336, -23.67677669529664], [151.46966991411009, -23.53033008588991], [151.32322330470336, -23.17677669529664], [150.96966991411009, -23.03033008588991], [150.82322330470336, -22.67677669529664], [150.46966991411009, -22.53033008588991], [150.32322330470336, -22.17677669529664]]]}, "2021-01-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[150.32322330470336, -22.17677669529664], [149.96966991411009, -22.03033008588991], [149.75, -21.5], [149.96966991411009, -20.96966991411009], [150.5, -20.75], [150.75, -20.853553390593273], [151.0, -20.75], [151.25, -20.853553390593273], [151.5, -20.75], [151.75, -20.853553390593273], [152.0, -20.75], [152.25, -20.853553390593273], [152.5, -20.75], [152.75, -20.853553390593273], [153.0, -20.75], [153.25, -20.853553390593273], [153.5, -20.75], [154.03033008588991, -20.96966991411009], [154.17677669529664, -21.32322330470336], [154.53033008588991, -21.46966991411009], [154.75, -22.0], [154.64644660940672, -22.25], [154.75, -22.5], [154.64644660940672, -22.75], [154.75, -23.0], [154.53033008588991, -23.53033008588991], [154.17677669529664, -23.67677669529664], [154.03033008588991, -24.03033008588991], [153.5, -24.25], [153.0, -24.042893218813454], [152.5, -24.25], [151.96966991411009, -24.03033008588991], [151.82322330470336, -23.67677669529664], [151.46966991411009, -23.53033008588991], [151.32322330470336, -23.17677669529664], [150.96966991411009, -23.03033008588991], [150.82322330470336, -22.67677669529664], [150.46966991411009, -22.53033008588991], [150.32322330470336, -22.17677669529664]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.1719542836574988}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2949768216285666}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.723138807576163, 24.900195683198888, 24.934972991201448, 25.19028594748886, 24.53935453890068, 24.890260001581566]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.723138807576163, 23.990691455624187, 24.420493957573285, 24.554605005754695, 24.029107248686444, 24.582143208666764]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8985323805177927, -1.0694140656372126, -1.068081046643627, -0.9989725291703133, -1.7840221486088772, -1.4922896557688727]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.8985323805177927, -1.353414345659587, -1.3386586600754526, -1.2149291748885958, -2.1719542836574988, -1.7836214073396377]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1574980712432503, -1.579904382284799, -1.5864909626347834, -1.520915442088846, -2.7194239646934175, -2.2458024017760176]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.1574980712432503, -2.0286265126282625, -2.0043166906701897, -1.850219862641158, -3.227209401643402, -2.6479730659081815]}}