{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:21:52.453651", "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-23_to_2021-Jan-27_115.0_-26.5"}, "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": 2021010000911}, "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 23 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 198394.64907851198}, "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": -26.5}, "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": 115.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 117.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -30.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[113.823, -27.177], [113.47, -27.03], [113.25, -26.5], [113.47, -25.97], [113.823, -25.823], [113.844, -25.774], [113.854, -25.75], [113.75, -25.5], [113.854, -25.25], [113.75, -25.0], [113.854, -24.75], [113.75, -24.5], [113.854, -24.25], [113.75, -24.0], [113.854, -23.75], [113.75, -23.5], [113.97, -22.97], [114.5, -22.75], [114.75, -22.854], [115.0, -22.75], [115.25, -22.854], [115.5, -22.75], [116.03, -22.97], [116.177, -23.323], [116.53, -23.47], [116.677, -23.823], [117.03, -23.97], [117.25, -24.5], [117.146, -24.749], [117.146, -24.75], [117.177, -24.823], [117.53, -24.97], [117.75, -25.5], [117.646, -25.75], [117.75, -26.0], [117.543, -26.5], [117.75, -27.0], [117.646, -27.25], [117.75, -27.5], [117.646, -27.75], [117.75, -28.0], [117.646, -28.25], [117.75, -28.5], [117.646, -28.75], [117.75, -29.0], [117.543, -29.5], [117.75, -30.0], [117.646, -30.25], [117.75, -30.5], [117.53, -31.03], [117.0, -31.25], [116.75, -31.146], [116.5, -31.25], [116.25, -31.146], [116.0, -31.25], [115.47, -31.03], [115.323, -30.677], [114.97, -30.53], [114.75, -30.0], [114.854, -29.75], [114.75, -29.5], [114.854, -29.251], [114.854, -29.25], [114.823, -29.177], [114.47, -29.03], [114.323, -28.677], [113.97, -28.53], [113.75, -28.0], [113.854, -27.75], [113.75, -27.5], [113.854, -27.25], [113.823, -27.177]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia", "S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[113.85355339059328, -26.25], [113.75, -26.0], [113.96966991411009, -25.46966991411009], [114.32322330470336, -25.32322330470336], [114.35355339059328, -25.25], [114.25, -25.0], [114.35355339059328, -24.75], [114.25, -24.5], [114.35355339059328, -24.25], [114.25, -24.0], [114.46966991411009, -23.46966991411009], [115.0, -23.25], [115.25, -23.353553390593273], [115.5, -23.25], [115.75, -23.353553390593273], [116.0, -23.25], [116.53033008588991, -23.46966991411009], [116.67677669529664, -23.82322330470336], [117.03033008588991, -23.96966991411009], [117.25, -24.5], [117.14644660940672, -24.75], [117.25, -25.0], [117.14644660940672, -25.25], [117.25, -25.5], [117.03033008588991, -26.03033008588991], [116.67677669529664, -26.17677669529664], [116.53033008588991, -26.53033008588991], [116.17677669529664, -26.67677669529664], [116.03033008588991, -27.03033008588991], [115.67677669529664, -27.17677669529664], [115.53033008588991, -27.53033008588991], [115.0, -27.75], [114.46966991411009, -27.53033008588991], [114.32322330470336, -27.17677669529664], [113.96966991411009, -27.03033008588991], [113.75, -26.5], [113.85355339059328, -26.25]]]}, "2021-01-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[113.82322330470336, -27.17677669529664], [113.46966991411009, -27.03033008588991], [113.25, -26.5], [113.46966991411009, -25.96966991411009], [113.82322330470336, -25.82322330470336], [113.85355339059328, -25.75], [113.75, -25.5], [113.85355339059328, -25.25], [113.75, -25.0], [113.85355339059328, -24.75], [113.75, -24.5], [113.85355339059328, -24.25], [113.75, -24.0], [113.85355339059328, -23.75], [113.75, -23.5], [113.96966991411009, -22.96966991411009], [114.5, -22.75], [114.75, -22.853553390593273], [115.0, -22.75], [115.25, -22.853553390593273], [115.5, -22.75], [116.03033008588991, -22.96966991411009], [116.17677669529664, -23.32322330470336], [116.53033008588991, -23.46966991411009], [116.67677669529664, -23.82322330470336], [117.03033008588991, -23.96966991411009], [117.25, -24.5], [117.14644660940672, -24.75], [117.17677669529664, -24.82322330470336], [117.53033008588991, -24.96966991411009], [117.75, -25.5], [117.64644660940672, -25.75], [117.75, -26.0], [117.54289321881346, -26.5], [117.75, -27.0], [117.64644660940672, -27.25], [117.75, -27.5], [117.64644660940672, -27.75], [117.75, -28.0], [117.64644660940672, -28.25], [117.75, -28.5], [117.64644660940672, -28.75], [117.75, -29.0], [117.54289321881346, -29.5], [117.75, -30.0], [117.64644660940672, -30.25], [117.75, -30.5], [117.53033008588991, -31.03033008588991], [117.0, -31.25], [116.75, -31.146446609406727], [116.5, -31.25], [115.96966991411009, -31.03033008588991], [115.75, -30.5], [115.85355339059328, -30.25], [115.82322330470336, -30.17677669529664], [115.46966991411009, -30.03033008588991], [115.32322330470336, -29.67677669529664], [114.96966991411009, -29.53033008588991], [114.82322330470336, -29.17677669529664], [114.46966991411009, -29.03033008588991], [114.25, -28.5], [114.35355339059328, -28.25], [114.32322330470336, -28.17677669529664], [113.96966991411009, -28.03033008588991], [113.75, -27.5], [113.85355339059328, -27.25], [113.82322330470336, -27.17677669529664]]]}, "2021-01-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[113.82322330470336, -27.17677669529664], [113.46966991411009, -27.03033008588991], [113.25, -26.5], [113.46966991411009, -25.96966991411009], [113.82322330470336, -25.82322330470336], [113.85355339059328, -25.75], [113.75, -25.5], [113.85355339059328, -25.25], [113.75, -25.0], [113.85355339059328, -24.75], [113.75, -24.5], [113.85355339059328, -24.25], [113.75, -24.0], [113.85355339059328, -23.75], [113.75, -23.5], [113.96966991411009, -22.96966991411009], [114.5, -22.75], [114.75, -22.853553390593273], [115.0, -22.75], [115.25, -22.853553390593273], [115.5, -22.75], [116.03033008588991, -22.96966991411009], [116.17677669529664, -23.32322330470336], [116.53033008588991, -23.46966991411009], [116.67677669529664, -23.82322330470336], [117.03033008588991, -23.96966991411009], [117.25, -24.5], [117.14644660940672, -24.75], [117.17677669529664, -24.82322330470336], [117.53033008588991, -24.96966991411009], [117.75, -25.5], [117.64644660940672, -25.75], [117.75, -26.0], [117.54289321881346, -26.5], [117.75, -27.0], [117.64644660940672, -27.25], [117.75, -27.5], [117.64644660940672, -27.75], [117.75, -28.0], [117.64644660940672, -28.25], [117.75, -28.5], [117.64644660940672, -28.75], [117.75, -29.0], [117.54289321881346, -29.5], [117.75, -30.0], [117.64644660940672, -30.25], [117.75, -30.5], [117.53033008588991, -31.03033008588991], [117.0, -31.25], [116.75, -31.146446609406727], [116.5, -31.25], [116.25, -31.146446609406727], [116.0, -31.25], [115.46966991411009, -31.03033008588991], [115.32322330470336, -30.67677669529664], [114.96966991411009, -30.53033008588991], [114.75, -30.0], [114.85355339059328, -29.75], [114.75, -29.5], [114.85355339059328, -29.25], [114.82322330470336, -29.17677669529664], [114.46966991411009, -29.03033008588991], [114.32322330470336, -28.67677669529664], [113.96966991411009, -28.53033008588991], [113.75, -28.0], [113.85355339059328, -27.75], [113.75, -27.5], [113.85355339059328, -27.25], [113.82322330470336, -27.17677669529664]]]}, "2021-01-26T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[113.82322330470336, -27.17677669529664], [113.46966991411009, -27.03033008588991], [113.25, -26.5], [113.46966991411009, -25.96966991411009], [113.82322330470336, -25.82322330470336], [113.85355339059328, -25.75], [113.75, -25.5], [113.85355339059328, -25.25], [113.75, -25.0], [113.85355339059328, -24.75], [113.75, -24.5], [113.85355339059328, -24.25], [113.75, -24.0], [113.85355339059328, -23.75], [113.75, -23.5], [113.96966991411009, -22.96966991411009], [114.5, -22.75], [114.75, -22.853553390593273], [115.0, -22.75], [115.25, -22.853553390593273], [115.5, -22.75], [116.03033008588991, -22.96966991411009], [116.17677669529664, -23.32322330470336], [116.53033008588991, -23.46966991411009], [116.75, -24.0], [116.64644660940672, -24.25], [116.67677669529664, -24.32322330470336], [117.03033008588991, -24.46966991411009], [117.17677669529664, -24.82322330470336], [117.53033008588991, -24.96966991411009], [117.75, -25.5], [117.64644660940672, -25.75], [117.75, -26.0], [117.54289321881346, -26.5], [117.75, -27.0], [117.64644660940672, -27.25], [117.75, -27.5], [117.64644660940672, -27.75], [117.75, -28.0], [117.64644660940672, -28.25], [117.75, -28.5], [117.64644660940672, -28.75], [117.75, -29.0], [117.54289321881346, -29.5], [117.75, -30.0], [117.64644660940672, -30.25], [117.75, -30.5], [117.53033008588991, -31.03033008588991], [117.0, -31.25], [116.75, -31.146446609406727], [116.5, -31.25], [116.25, -31.146446609406727], [116.0, -31.25], [115.46966991411009, -31.03033008588991], [115.32322330470336, -30.67677669529664], [114.96966991411009, -30.53033008588991], [114.75, -30.0], [114.85355339059328, -29.75], [114.75, -29.5], [114.85355339059328, -29.25], [114.82322330470336, -29.17677669529664], [114.46966991411009, -29.03033008588991], [114.32322330470336, -28.67677669529664], [113.96966991411009, -28.53033008588991], [113.75, -28.0], [113.85355339059328, -27.75], [113.75, -27.5], [113.85355339059328, -27.25], [113.82322330470336, -27.17677669529664]]]}, "2021-01-27T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[113.85355339059328, -27.75], [113.75, -27.5], [113.85355339059328, -27.25], [113.75, -27.0], [113.85355339059328, -26.75], [113.75, -26.5], [113.96966991411009, -25.96966991411009], [114.32322330470336, -25.82322330470336], [114.46966991411009, -25.46966991411009], [115.0, -25.25], [115.25, -25.353553390593273], [115.32322330470336, -25.32322330470336], [115.46966991411009, -24.96966991411009], [116.0, -24.75], [116.53033008588991, -24.96966991411009], [116.67677669529664, -25.32322330470336], [117.03033008588991, -25.46966991411009], [117.25, -26.0], [117.14644660940672, -26.25], [117.25, -26.5], [117.03033008588991, -27.03033008588991], [116.5, -27.25], [116.25, -27.146446609406727], [116.17677669529664, -27.17677669529664], [116.14644660940672, -27.25], [116.17677669529664, -27.32322330470336], [116.53033008588991, -27.46966991411009], [116.75, -28.0], [116.64644660940672, -28.25], [116.67677669529664, -28.32322330470336], [117.03033008588991, -28.46966991411009], [117.25, -29.0], [117.14644660940672, -29.25], [117.17677669529664, -29.32322330470336], [117.53033008588991, -29.46966991411009], [117.75, -30.0], [117.64644660940672, -30.25], [117.75, -30.5], [117.53033008588991, -31.03033008588991], [117.0, -31.25], [116.75, -31.146446609406727], [116.5, -31.25], [116.25, -31.146446609406727], [116.0, -31.25], [115.46966991411009, -31.03033008588991], [115.32322330470336, -30.67677669529664], [114.96966991411009, -30.53033008588991], [114.75, -30.0], [114.85355339059328, -29.75], [114.75, -29.5], [114.85355339059328, -29.25], [114.82322330470336, -29.17677669529664], [114.46966991411009, -29.03033008588991], [114.32322330470336, -28.67677669529664], [113.96966991411009, -28.53033008588991], [113.75, -28.0], [113.85355339059328, -27.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.948239819119806}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.442541511629471}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.057654040046145, 24.55004578910092, 24.737844016693657, 24.642186187565187, 24.190848293789543]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.40154243631332, 21.60932535880869, 21.06861274463148, 20.62621151485024, 20.950886927182694]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.744112303024501, -5.801867510864411, -5.423816009269522, -5.548004362178763, -5.049469390243091]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.478162143746999, -6.843268551662447, -6.365031651804145, -6.948239819119806, -5.971361924069242]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.46081065545077, -1.7593867642340009, -1.6402708950968332, -1.6586934408262337, -1.4533286974161108]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6356817849098706, -2.092519970030978, -1.859413694804613, -1.9584066425983981, -1.6816681891656342]}}