{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:23:43.747207", "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-Apr-28_to_2021-Apr-30_146.5_-18.5"}, "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": 2021040001208}, "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": "April 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 30 2021"}, "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": 61412.77264947363}, "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": -18.5}, "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": 146.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "146.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 146.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 149.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[145.854, -18.25], [145.75, -18.0], [145.854, -17.75], [145.75, -17.5], [145.854, -17.25], [145.75, -17.0], [145.97, -16.47], [146.5, -16.25], [147.03, -16.47], [147.25, -17.0], [147.146, -17.25], [147.177, -17.323], [147.25, -17.354], [147.5, -17.25], [148.03, -17.47], [148.177, -17.823], [148.53, -17.97], [148.677, -18.323], [149.03, -18.47], [149.177, -18.823], [149.25, -18.854], [149.5, -18.75], [150.03, -18.97], [150.25, -19.5], [150.146, -19.75], [150.25, -20.0], [150.03, -20.53], [149.677, -20.677], [149.53, -21.03], [149.0, -21.25], [148.47, -21.03], [148.323, -20.677], [147.97, -20.53], [147.75, -20.0], [147.854, -19.75], [147.823, -19.677], [147.75, -19.646], [147.5, -19.75], [147.25, -19.646], [147.0, -19.75], [146.75, -19.646], [146.5, -19.75], [145.97, -19.53], [145.75, -19.0], [145.854, -18.75], [145.75, -18.5], [145.854, -18.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia", "E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-04-28T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[145.85355339059328, -18.75], [145.75, -18.5], [145.85355339059328, -18.25], [145.75, -18.0], [145.85355339059328, -17.75], [145.75, -17.5], [145.85355339059328, -17.25], [145.75, -17.0], [145.96966991411009, -16.46966991411009], [146.5, -16.25], [147.03033008588991, -16.46966991411009], [147.25, -17.0], [147.14644660940672, -17.25], [147.17677669529664, -17.32322330470336], [147.25, -17.353553390593273], [147.5, -17.25], [148.03033008588991, -17.46966991411009], [148.17677669529664, -17.82322330470336], [148.53033008588991, -17.96966991411009], [148.67677669529664, -18.32322330470336], [149.03033008588991, -18.46966991411009], [149.17677669529664, -18.82322330470336], [149.25, -18.853553390593273], [149.5, -18.75], [150.03033008588991, -18.96966991411009], [150.25, -19.5], [150.14644660940672, -19.75], [150.25, -20.0], [150.03033008588991, -20.53033008588991], [149.67677669529664, -20.67677669529664], [149.53033008588991, -21.03033008588991], [149.0, -21.25], [148.46966991411009, -21.03033008588991], [148.32322330470336, -20.67677669529664], [147.96966991411009, -20.53033008588991], [147.75, -20.0], [147.85355339059328, -19.75], [147.82322330470336, -19.67677669529664], [147.75, -19.646446609406727], [147.5, -19.75], [147.25, -19.646446609406727], [147.0, -19.75], [146.75, -19.646446609406727], [146.5, -19.75], [145.96966991411009, -19.53033008588991], [145.75, -19.0], [145.85355339059328, -18.75]]]}, "2021-04-29T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[145.85355339059328, -18.75], [145.75, -18.5], [145.85355339059328, -18.25], [145.75, -18.0], [145.85355339059328, -17.75], [145.75, -17.5], [145.85355339059328, -17.25], [145.75, -17.0], [145.96966991411009, -16.46966991411009], [146.5, -16.25], [147.03033008588991, -16.46966991411009], [147.25, -17.0], [147.14644660940672, -17.25], [147.17677669529664, -17.32322330470336], [147.25, -17.353553390593273], [147.5, -17.25], [148.03033008588991, -17.46966991411009], [148.17677669529664, -17.82322330470336], [148.53033008588991, -17.96966991411009], [148.67677669529664, -18.32322330470336], [149.03033008588991, -18.46966991411009], [149.17677669529664, -18.82322330470336], [149.25, -18.853553390593273], [149.5, -18.75], [150.03033008588991, -18.96966991411009], [150.25, -19.5], [150.14644660940672, -19.75], [150.25, -20.0], [150.03033008588991, -20.53033008588991], [149.67677669529664, -20.67677669529664], [149.53033008588991, -21.03033008588991], [149.0, -21.25], [148.46966991411009, -21.03033008588991], [148.32322330470336, -20.67677669529664], [147.96966991411009, -20.53033008588991], [147.75, -20.0], [147.85355339059328, -19.75], [147.82322330470336, -19.67677669529664], [147.75, -19.646446609406727], [147.5, -19.75], [147.25, -19.646446609406727], [147.0, -19.75], [146.75, -19.646446609406727], [146.5, -19.75], [145.96966991411009, -19.53033008588991], [145.75, -19.0], [145.85355339059328, -18.75]]]}, "2021-04-30T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[145.85355339059328, -18.75], [145.75, -18.5], [145.85355339059328, -18.25], [145.75, -18.0], [145.85355339059328, -17.75], [145.75, -17.5], [145.85355339059328, -17.25], [145.75, -17.0], [145.96966991411009, -16.46966991411009], [146.5, -16.25], [147.03033008588991, -16.46966991411009], [147.25, -17.0], [147.14644660940672, -17.25], [147.17677669529664, -17.32322330470336], [147.25, -17.353553390593273], [147.5, -17.25], [148.03033008588991, -17.46966991411009], [148.17677669529664, -17.82322330470336], [148.53033008588991, -17.96966991411009], [148.67677669529664, -18.32322330470336], [149.03033008588991, -18.46966991411009], [149.17677669529664, -18.82322330470336], [149.25, -18.853553390593273], [149.5, -18.75], [150.03033008588991, -18.96966991411009], [150.25, -19.5], [150.14644660940672, -19.75], [150.25, -20.0], [150.03033008588991, -20.53033008588991], [149.67677669529664, -20.67677669529664], [149.53033008588991, -21.03033008588991], [149.0, -21.25], [148.46966991411009, -21.03033008588991], [148.32322330470336, -20.67677669529664], [147.96966991411009, -20.53033008588991], [147.75, -20.0], [147.85355339059328, -19.75], [147.82322330470336, -19.67677669529664], [147.75, -19.646446609406727], [147.5, -19.75], [147.25, -19.646446609406727], [147.0, -19.75], [146.75, -19.646446609406727], [146.5, -19.75], [145.96966991411009, -19.53033008588991], [145.75, -19.0], [145.85355339059328, -18.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.2857021148303716}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6050969672713944}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.378602489506306, 22.93179329956314, 23.161064029871113]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.348375125499842, 21.66327972646701, 22.019510780263374]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4554551748852305, -1.8319462783492917, -1.527889448579661]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.999778760754623, -2.2857021148303716, -2.0681254033709706]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6987814974230164, -2.1411499331361603, -1.822656168375477]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.403613438928437, -2.68005546522093, -2.5219128563766264]}}