{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:41.923875", "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": "2018-May-22_to_2018-May-24_168.0_-44.0"}, "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": 2018050000889}, "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": "May 22 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 24 2018"}, "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": 61724.57321675347}, "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": ["New Zealand"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand"]}, "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": ["Tasman 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": -44.0}, "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": 168.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "168.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 164.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 168.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -46.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[164.47, -44.53], [164.25, -44.0], [164.47, -43.47], [165.0, -43.25], [165.25, -43.35], [165.32, -43.32], [165.35, -43.25], [165.25, -43.0], [165.47, -42.47], [166.0, -42.25], [166.25, -42.35], [166.5, -42.25], [167.03, -42.47], [167.18, -42.82], [167.25, -42.85], [167.5, -42.75], [168.03, -42.97], [168.18, -43.32], [168.53, -43.47], [168.75, -44.0], [168.53, -44.53], [168.18, -44.68], [168.15, -44.75], [168.25, -45.0], [168.15, -45.25], [168.25, -45.5], [168.03, -46.03], [167.68, -46.18], [167.53, -46.53], [167.0, -46.75], [166.75, -46.65], [166.5, -46.75], [166.25, -46.65], [166.0, -46.75], [165.47, -46.53], [165.25, -46.0], [165.35, -45.75], [165.25, -45.5], [165.35, -45.25], [165.25, -45.0], [165.35, -44.75], [165.32, -44.68], [165.25, -44.65], [165.0, -44.75], [164.47, -44.53]]]]}, "2018-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[164.47, -44.53], [164.25, -44.0], [164.47, -43.47], [165.0, -43.25], [165.25, -43.35], [165.32, -43.32], [165.35, -43.25], [165.25, -43.0], [165.47, -42.47], [166.0, -42.25], [166.25, -42.35], [166.5, -42.25], [167.03, -42.47], [167.18, -42.82], [167.25, -42.85], [167.5, -42.75], [168.03, -42.97], [168.18, -43.32], [168.53, -43.47], [168.75, -44.0], [168.53, -44.53], [168.18, -44.68], [168.15, -44.75], [168.25, -45.0], [168.15, -45.25], [168.25, -45.5], [168.03, -46.03], [167.68, -46.18], [167.53, -46.53], [167.0, -46.75], [166.75, -46.65], [166.5, -46.75], [166.25, -46.65], [166.0, -46.75], [165.47, -46.53], [165.25, -46.0], [165.35, -45.75], [165.25, -45.5], [165.35, -45.25], [165.25, -45.0], [165.35, -44.75], [165.32, -44.68], [165.25, -44.65], [165.0, -44.75], [164.47, -44.53]]]]}, "2018-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[164.47, -44.53], [164.25, -44.0], [164.47, -43.47], [165.0, -43.25], [165.25, -43.35], [165.32, -43.32], [165.35, -43.25], [165.25, -43.0], [165.47, -42.47], [166.0, -42.25], [166.25, -42.35], [166.5, -42.25], [167.03, -42.47], [167.18, -42.82], [167.25, -42.85], [167.5, -42.75], [168.03, -42.97], [168.18, -43.32], [168.53, -43.47], [168.75, -44.0], [168.53, -44.53], [168.18, -44.68], [168.15, -44.75], [168.25, -45.0], [168.15, -45.25], [168.25, -45.5], [168.03, -46.03], [167.68, -46.18], [167.53, -46.53], [167.0, -46.75], [166.75, -46.65], [166.5, -46.75], [166.25, -46.65], [166.0, -46.75], [165.47, -46.53], [165.25, -46.0], [165.35, -45.75], [165.25, -45.5], [165.35, -45.25], [165.25, -45.0], [165.35, -44.75], [165.32, -44.68], [165.25, -44.65], [165.0, -44.75], [164.47, -44.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.334246397263769}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.017158843822238}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.184182319671606, 8.490504044663737, 7.593282602440809]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.5044637478791856, 1.348950501465822, 0.7127241566458338]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0550103645734845, -2.625852051215312, -3.3706141156779177]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.21141055086531, -3.939365808093612, -4.334246397263769]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.833144231687774, -1.5119056240424134, -1.9213389165019215]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1040248234055388, -1.5978719782626045, -2.6942919590876406]}}