{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:27.450009", "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": "2026-Apr-06_to_2026-Apr-12_143.0_-15.5"}, "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": 2026040000205}, "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 06 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 163046.01953331218}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Australia"]}, "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": -15.5}, "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": 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": 141.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 145.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.25, -15.5], [141.47, -14.97], [141.82, -14.82], [141.97, -14.47], [142.5, -14.25], [143.03, -14.47], [143.18, -14.82], [143.53, -14.97], [143.75, -15.5], [143.65, -15.75], [143.75, -16.0], [143.53, -16.53], [143.13, -16.7], [143.25, -17.0], [143.03, -17.53], [142.5, -17.75], [141.97, -17.53], [141.75, -17.0], [141.96, -16.5], [141.82, -16.18], [141.47, -16.03], [141.25, -15.5]]]]}, "2026-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.75, -17.0], [140.97, -16.47], [141.38, -16.3], [141.25, -16.0], [141.35, -15.75], [141.25, -15.5], [141.35, -15.25], [141.25, -15.0], [141.47, -14.47], [142.0, -14.25], [142.25, -14.35], [142.5, -14.25], [143.03, -14.47], [143.18, -14.82], [143.53, -14.97], [143.75, -15.5], [143.65, -15.75], [143.68, -15.82], [143.75, -15.85], [144.0, -15.75], [144.25, -15.85], [144.5, -15.75], [145.03, -15.97], [145.18, -16.32], [145.53, -16.47], [145.75, -17.0], [145.65, -17.25], [145.75, -17.5], [145.53, -18.03], [145.0, -18.25], [144.75, -18.15], [144.68, -18.18], [144.53, -18.53], [144.18, -18.68], [144.03, -19.03], [143.5, -19.25], [143.25, -19.15], [143.0, -19.25], [142.5, -19.04], [142.0, -19.25], [141.47, -19.03], [141.32, -18.68], [140.97, -18.53], [140.75, -18.0], [140.85, -17.75], [140.75, -17.5], [140.85, -17.25], [140.75, -17.0]]], [[[143.97, -14.47], [144.5, -14.25], [145.03, -14.47], [145.25, -15.0], [145.03, -15.53], [144.5, -15.75], [143.97, -15.53], [143.75, -15.0], [143.97, -14.47]]]]}, "2026-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.85, -17.25], [140.75, -17.0], [140.97, -16.47], [141.38, -16.3], [141.25, -16.0], [141.35, -15.75], [141.25, -15.5], [141.35, -15.25], [141.25, -15.0], [141.35, -14.75], [141.25, -14.5], [141.47, -13.97], [142.0, -13.75], [142.25, -13.85], [142.5, -13.75], [143.0, -13.96], [143.5, -13.75], [144.0, -13.96], [144.5, -13.75], [145.03, -13.97], [145.25, -14.5], [145.15, -14.75], [145.18, -14.82], [145.53, -14.97], [145.75, -15.5], [145.53, -16.03], [145.18, -16.18], [145.15, -16.25], [145.18, -16.32], [145.53, -16.47], [145.75, -17.0], [145.65, -17.25], [145.75, -17.5], [145.53, -18.03], [145.0, -18.25], [144.75, -18.15], [144.68, -18.18], [144.53, -18.53], [144.18, -18.68], [144.03, -19.03], [143.5, -19.25], [143.25, -19.15], [143.0, -19.25], [142.5, -19.04], [142.0, -19.25], [141.47, -19.03], [141.32, -18.68], [140.97, -18.53], [140.75, -18.0], [140.85, -17.75], [140.75, -17.5], [140.85, -17.25]]]]}, "2026-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.85, -17.25], [140.75, -17.0], [140.97, -16.47], [141.38, -16.3], [141.25, -16.0], [141.35, -15.75], [141.25, -15.5], [141.35, -15.25], [141.25, -15.0], [141.35, -14.75], [141.25, -14.5], [141.35, -14.25], [141.25, -14.0], [141.47, -13.47], [142.0, -13.25], [142.25, -13.35], [142.5, -13.25], [143.03, -13.47], [143.2, -13.87], [143.5, -13.75], [144.0, -13.96], [144.5, -13.75], [145.03, -13.97], [145.25, -14.5], [145.15, -14.75], [145.18, -14.82], [145.53, -14.97], [145.75, -15.5], [145.53, -16.03], [145.18, -16.18], [145.15, -16.25], [145.18, -16.32], [145.53, -16.47], [145.75, -17.0], [145.65, -17.25], [145.75, -17.5], [145.53, -18.03], [145.0, -18.25], [144.75, -18.15], [144.68, -18.18], [144.53, -18.53], [144.18, -18.68], [144.03, -19.03], [143.5, -19.25], [143.25, -19.15], [143.0, -19.25], [142.5, -19.04], [142.0, -19.25], [141.47, -19.03], [141.32, -18.68], [140.97, -18.53], [140.75, -18.0], [140.85, -17.75], [140.75, -17.5], [140.85, -17.25]]]]}, "2026-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.85, -17.25], [140.75, -17.0], [140.97, -16.47], [141.38, -16.3], [141.25, -16.0], [141.35, -15.75], [141.25, -15.5], [141.35, -15.25], [141.25, -15.0], [141.35, -14.75], [141.25, -14.5], [141.35, -14.25], [141.25, -14.0], [141.47, -13.47], [142.0, -13.25], [142.25, -13.35], [142.5, -13.25], [143.03, -13.47], [143.2, -13.87], [143.5, -13.75], [144.0, -13.96], [144.5, -13.75], [145.03, -13.97], [145.25, -14.5], [145.15, -14.75], [145.18, -14.82], [145.53, -14.97], [145.75, -15.5], [145.53, -16.03], [145.18, -16.18], [145.15, -16.25], [145.25, -16.5], [145.15, -16.75], [145.25, -17.0], [145.15, -17.25], [145.25, -17.5], [145.03, -18.03], [144.68, -18.18], [144.53, -18.53], [144.18, -18.68], [144.03, -19.03], [143.5, -19.25], [143.25, -19.15], [143.0, -19.25], [142.5, -19.04], [142.0, -19.25], [141.47, -19.03], [141.32, -18.68], [140.97, -18.53], [140.75, -18.0], [140.85, -17.75], [140.75, -17.5], [140.85, -17.25]]]]}, "2026-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.46, -15.0], [141.25, -14.5], [141.35, -14.25], [141.25, -14.0], [141.47, -13.47], [142.0, -13.25], [142.25, -13.35], [142.5, -13.25], [143.03, -13.47], [143.25, -14.0], [143.15, -14.25], [143.18, -14.32], [143.25, -14.35], [143.5, -14.25], [144.0, -14.46], [144.5, -14.25], [145.03, -14.47], [145.25, -15.0], [145.03, -15.53], [144.63, -15.7], [144.68, -15.82], [145.03, -15.97], [145.25, -16.5], [145.15, -16.75], [145.25, -17.0], [145.03, -17.53], [144.5, -17.75], [144.25, -17.65], [144.18, -17.68], [144.03, -18.03], [143.5, -18.25], [142.97, -18.03], [142.82, -17.68], [142.75, -17.65], [142.5, -17.75], [141.97, -17.53], [141.75, -17.0], [141.85, -16.75], [141.82, -16.68], [141.47, -16.53], [141.25, -16.0], [141.35, -15.75], [141.25, -15.5], [141.46, -15.0]]]]}, "2026-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.97, -14.47], [142.5, -14.25], [142.75, -14.35], [143.0, -14.25], [143.53, -14.47], [143.75, -15.0], [143.65, -15.25], [143.75, -15.5], [143.53, -16.03], [143.0, -16.25], [142.47, -16.03], [142.32, -15.68], [141.97, -15.53], [141.75, -15.0], [141.97, -14.47]]], [[[145.03, -14.47], [145.25, -15.0], [145.03, -15.53], [144.5, -15.75], [143.97, -15.53], [143.75, -15.0], [143.97, -14.47], [144.5, -14.25], [145.03, -14.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.4689871633887037}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0702362532276535}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.219145529610785, 25.1593060330228, 25.00877940819703, 25.034461420232617, 24.917967612788402, 24.894671194893988, 25.536873118082724]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.910400644938193, 21.262676493326865, 21.460600789388025, 21.39466501871749, 23.282041168212913, 23.455311075846396, 25.40383682250979]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4980341909170372, -2.167992316619292, -2.0504867624446357, -1.9563543899544056, -2.16294959445245, -2.253327134617913, -1.484814707820334]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8242698166931746, -3.4613131364459946, -2.833176155349065, -2.89928276522744, -3.156551730089973, -3.4689871633887037, -1.7676158281468588]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3507024714826643, -1.6301191485745672, -1.683740508247172, -1.5571837255323113, -1.6666105677640468, -1.7827817592147854, -1.3893380134199893]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4818244516565435, -2.138834577683687, -2.2340338661001073, -2.1683400245209854, -2.1105002811535236, -2.293315771813467, -1.4746866777323395]}}