{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:20.740391", "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": "2024-Dec-02_to_2024-Dec-05_143.0_-18.0"}, "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": 2024120000109}, "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": "December 02 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 05 2024"}, "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": 82802.26333890573}, "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": -18.0}, "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": 143.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "143.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 141.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 144.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[142.47, -18.53], [142.32, -18.18], [142.25, -18.15], [142.0, -18.25], [141.75, -18.15], [141.5, -18.25], [140.97, -18.03], [140.82, -17.68], [140.47, -17.53], [140.25, -17.0], [140.47, -16.47], [140.82, -16.32], [140.97, -15.97], [141.5, -15.75], [141.75, -15.85], [141.82, -15.82], [141.97, -15.47], [142.32, -15.32], [142.47, -14.97], [143.0, -14.75], [143.53, -14.97], [143.68, -15.32], [143.75, -15.35], [144.0, -15.25], [144.53, -15.47], [144.75, -16.0], [144.65, -16.25], [144.68, -16.32], [145.03, -16.47], [145.25, -17.0], [145.03, -17.53], [144.68, -17.68], [144.65, -17.75], [144.75, -18.0], [144.53, -18.53], [144.0, -18.75], [143.75, -18.65], [143.5, -18.75], [143.25, -18.65], [143.0, -18.75], [142.47, -18.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.47, -17.47], [143.0, -17.25], [143.53, -17.47], [143.75, -18.0], [143.53, -18.53], [143.0, -18.75], [142.47, -18.53], [142.25, -18.0], [142.47, -17.47]]]]}, "2024-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.47, -17.53], [140.25, -17.0], [140.47, -16.47], [140.82, -16.32], [140.97, -15.97], [141.5, -15.75], [141.75, -15.85], [141.82, -15.82], [141.97, -15.47], [142.32, -15.32], [142.47, -14.97], [143.0, -14.75], [143.53, -14.97], [143.68, -15.32], [143.75, -15.35], [144.0, -15.25], [144.53, -15.47], [144.75, -16.0], [144.65, -16.25], [144.68, -16.32], [145.03, -16.47], [145.25, -17.0], [145.03, -17.53], [144.68, -17.68], [144.65, -17.75], [144.75, -18.0], [144.53, -18.53], [144.0, -18.75], [143.75, -18.65], [143.5, -18.75], [143.25, -18.65], [143.0, -18.75], [142.47, -18.53], [142.32, -18.18], [142.25, -18.15], [142.0, -18.25], [141.75, -18.15], [141.5, -18.25], [140.97, -18.03], [140.82, -17.68], [140.47, -17.53]]]]}, "2024-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.47, -17.53], [140.25, -17.0], [140.47, -16.47], [140.82, -16.32], [140.97, -15.97], [141.5, -15.75], [141.75, -15.85], [141.82, -15.82], [141.97, -15.47], [142.32, -15.32], [142.47, -14.97], [143.0, -14.75], [143.53, -14.97], [143.68, -15.32], [143.75, -15.35], [144.0, -15.25], [144.53, -15.47], [144.75, -16.0], [144.65, -16.25], [144.68, -16.32], [145.03, -16.47], [145.25, -17.0], [145.03, -17.53], [144.68, -17.68], [144.65, -17.75], [144.75, -18.0], [144.53, -18.53], [144.0, -18.75], [143.75, -18.65], [143.5, -18.75], [143.25, -18.65], [143.0, -18.75], [142.47, -18.53], [142.32, -18.18], [142.25, -18.15], [142.0, -18.25], [141.75, -18.15], [141.5, -18.25], [140.97, -18.03], [140.82, -17.68], [140.47, -17.53]]]]}, "2024-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.47, -17.53], [140.25, -17.0], [140.47, -16.47], [140.82, -16.32], [140.97, -15.97], [141.5, -15.75], [141.75, -15.85], [141.82, -15.82], [141.97, -15.47], [142.32, -15.32], [142.47, -14.97], [143.0, -14.75], [143.53, -14.97], [143.68, -15.32], [143.75, -15.35], [144.0, -15.25], [144.53, -15.47], [144.75, -16.0], [144.65, -16.25], [144.68, -16.32], [145.03, -16.47], [145.25, -17.0], [145.03, -17.53], [144.68, -17.68], [144.65, -17.75], [144.75, -18.0], [144.53, -18.53], [144.0, -18.75], [143.75, -18.65], [143.5, -18.75], [143.25, -18.65], [143.0, -18.75], [142.47, -18.53], [142.32, -18.18], [142.25, -18.15], [142.0, -18.25], [141.75, -18.15], [141.5, -18.25], [140.97, -18.03], [140.82, -17.68], [140.47, -17.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.204102596143912}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0426942560091055}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.192775980631552, 27.652566891624815, 27.088935016450478, 27.466660890125183]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.192775980631552, 25.21510467529299, 24.520441945393884, 25.747983551025413]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.901124043253276, -2.778961660403752, -3.3701774507765543, -2.983999735874004]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.901124043253276, -3.697228434824865, -4.204102596143912, -3.9731056031177445]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5393964146540462, -1.667745730411546, -2.0023004286670387, -1.7046310555029862]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5393964146540462, -1.9268764088214425, -2.531954358470537, -1.9940926721644645]}}