{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:25.188201", "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-Feb-09_to_2024-Feb-13_172.0_-41.0"}, "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": 2024020000263}, "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": "February 09 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 13 2024"}, "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": 349664.4935528113}, "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"]}, "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": -41.0}, "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": 172.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "172.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 163.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 172.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -44.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -36.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[171.35, -40.75], [171.25, -40.5], [171.47, -39.97], [172.0, -39.75], [172.25, -39.85], [172.5, -39.75], [173.03, -39.97], [173.25, -40.5], [173.15, -40.75], [173.25, -41.0], [173.15, -41.25], [173.25, -41.5], [173.03, -42.03], [172.68, -42.18], [172.53, -42.53], [172.18, -42.68], [172.03, -43.03], [171.5, -43.25], [171.25, -43.15], [171.18, -43.18], [171.03, -43.53], [170.68, -43.68], [170.53, -44.03], [170.18, -44.18], [170.03, -44.53], [169.5, -44.75], [169.25, -44.65], [169.0, -44.75], [168.75, -44.65], [168.5, -44.75], [167.97, -44.53], [167.75, -44.0], [167.97, -43.47], [168.32, -43.32], [168.47, -42.97], [168.82, -42.82], [168.85, -42.75], [168.82, -42.68], [168.47, -42.53], [168.32, -42.18], [167.97, -42.03], [167.82, -41.68], [167.47, -41.53], [167.32, -41.18], [167.25, -41.15], [167.24, -41.15], [167.0, -41.25], [166.47, -41.03], [166.32, -40.68], [165.97, -40.53], [165.75, -40.0], [165.88, -39.7], [165.75, -39.65], [165.5, -39.75], [165.25, -39.65], [165.0, -39.75], [164.75, -39.65], [164.5, -39.75], [163.97, -39.53], [163.75, -39.0], [163.85, -38.75], [163.75, -38.5], [163.85, -38.25], [163.75, -38.0], [163.97, -37.47], [164.32, -37.32], [164.37, -37.2], [164.25, -37.15], [164.0, -37.25], [163.75, -37.15], [163.5, -37.25], [162.97, -37.03], [162.75, -36.5], [162.85, -36.25], [162.75, -36.0], [162.97, -35.47], [163.5, -35.25], [163.75, -35.35], [164.0, -35.25], [164.53, -35.47], [164.68, -35.82], [164.75, -35.85], [165.0, -35.75], [165.25, -35.85], [165.5, -35.75], [165.75, -35.85], [166.0, -35.75], [166.25, -35.85], [166.32, -35.82], [166.47, -35.47], [167.0, -35.25], [167.25, -35.35], [167.5, -35.25], [167.75, -35.35], [168.0, -35.25], [168.25, -35.35], [168.5, -35.25], [168.75, -35.35], [169.0, -35.25], [169.25, -35.35], [169.5, -35.25], [170.03, -35.47], [170.18, -35.82], [170.53, -35.97], [170.68, -36.32], [171.03, -36.47], [171.25, -37.0], [171.15, -37.25], [171.25, -37.5], [171.15, -37.75], [171.25, -38.0], [171.15, -38.25], [171.25, -38.5], [171.15, -38.75], [171.25, -39.0], [171.03, -39.53], [170.68, -39.68], [170.65, -39.75], [170.75, -40.0], [170.65, -40.25], [170.68, -40.32], [171.03, -40.47], [171.18, -40.82], [171.25, -40.85], [171.32, -40.82], [171.35, -40.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[163.75, -38.0], [163.97, -37.47], [164.32, -37.32], [164.47, -36.97], [164.82, -36.82], [164.97, -36.47], [165.5, -36.25], [165.75, -36.35], [166.0, -36.25], [166.25, -36.35], [166.5, -36.25], [166.75, -36.35], [167.0, -36.25], [167.25, -36.35], [167.5, -36.25], [168.03, -36.47], [168.18, -36.82], [168.53, -36.97], [168.75, -37.5], [168.65, -37.75], [168.68, -37.82], [169.03, -37.97], [169.18, -38.32], [169.25, -38.35], [169.5, -38.25], [170.03, -38.47], [170.18, -38.82], [170.53, -38.97], [170.75, -39.5], [170.65, -39.75], [170.75, -40.0], [170.65, -40.25], [170.68, -40.32], [171.03, -40.47], [171.18, -40.82], [171.3, -40.87], [171.47, -40.47], [172.0, -40.25], [172.53, -40.47], [172.75, -41.0], [172.53, -41.53], [172.0, -41.75], [171.7, -41.62], [171.53, -42.03], [171.18, -42.18], [171.03, -42.53], [170.5, -42.75], [170.25, -42.65], [170.18, -42.68], [170.03, -43.03], [169.5, -43.25], [168.97, -43.03], [168.82, -42.68], [168.47, -42.53], [168.32, -42.18], [167.97, -42.03], [167.82, -41.68], [167.47, -41.53], [167.32, -41.18], [166.97, -41.03], [166.82, -40.68], [166.47, -40.53], [166.25, -40.0], [166.35, -39.75], [166.32, -39.68], [166.25, -39.65], [166.0, -39.75], [165.75, -39.65], [165.5, -39.75], [164.97, -39.53], [164.82, -39.18], [164.75, -39.15], [164.5, -39.25], [163.97, -39.03], [163.75, -38.5], [163.85, -38.25], [163.75, -38.0]]]]}, "2024-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[162.75, -36.0], [162.97, -35.47], [163.5, -35.25], [163.75, -35.35], [164.0, -35.25], [164.53, -35.47], [164.68, -35.82], [164.75, -35.85], [165.0, -35.75], [165.25, -35.85], [165.5, -35.75], [165.75, -35.85], [166.0, -35.75], [166.25, -35.85], [166.32, -35.82], [166.47, -35.47], [167.0, -35.25], [167.25, -35.35], [167.5, -35.25], [167.75, -35.35], [168.0, -35.25], [168.25, -35.35], [168.5, -35.25], [168.75, -35.35], [169.0, -35.25], [169.25, -35.35], [169.5, -35.25], [170.03, -35.47], [170.18, -35.82], [170.53, -35.97], [170.68, -36.32], [171.03, -36.47], [171.25, -37.0], [171.15, -37.25], [171.25, -37.5], [171.15, -37.75], [171.25, -38.0], [171.15, -38.25], [171.25, -38.5], [171.15, -38.75], [171.25, -39.0], [171.03, -39.53], [170.68, -39.68], [170.65, -39.75], [170.75, -40.0], [170.65, -40.25], [170.68, -40.32], [171.03, -40.47], [171.18, -40.82], [171.25, -40.85], [171.32, -40.82], [171.35, -40.75], [171.25, -40.5], [171.47, -39.97], [172.0, -39.75], [172.25, -39.85], [172.5, -39.75], [173.03, -39.97], [173.25, -40.5], [173.15, -40.75], [173.25, -41.0], [173.15, -41.25], [173.25, -41.5], [173.03, -42.03], [172.68, -42.18], [172.53, -42.53], [172.18, -42.68], [172.03, -43.03], [171.5, -43.25], [171.25, -43.15], [171.18, -43.18], [171.03, -43.53], [170.68, -43.68], [170.53, -44.03], [170.18, -44.18], [170.03, -44.53], [169.5, -44.75], [169.25, -44.65], [169.0, -44.75], [168.75, -44.65], [168.5, -44.75], [167.97, -44.53], [167.75, -44.0], [167.97, -43.47], [168.32, -43.32], [168.47, -42.97], [168.82, -42.82], [168.85, -42.75], [168.82, -42.68], [168.47, -42.53], [168.32, -42.18], [167.97, -42.03], [167.82, -41.68], [167.47, -41.53], [167.32, -41.18], [167.25, -41.15], [167.0, -41.25], [166.47, -41.03], [166.32, -40.68], [165.97, -40.53], [165.75, -40.0], [165.88, -39.7], [165.75, -39.65], [165.5, -39.75], [165.25, -39.65], [165.0, -39.75], [164.75, -39.65], [164.5, -39.75], [163.97, -39.53], [163.75, -39.0], [163.85, -38.75], [163.75, -38.5], [163.85, -38.25], [163.75, -38.0], [163.97, -37.47], [164.32, -37.32], [164.38, -37.2], [164.25, -37.15], [164.0, -37.25], [163.75, -37.15], [163.5, -37.25], [162.97, -37.03], [162.75, -36.5], [162.85, -36.25], [162.75, -36.0]]]]}, "2024-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[162.75, -36.0], [162.97, -35.47], [163.5, -35.25], [163.75, -35.35], [164.0, -35.25], [164.53, -35.47], [164.68, -35.82], [164.75, -35.85], [165.0, -35.75], [165.25, -35.85], [165.5, -35.75], [165.75, -35.85], [166.0, -35.75], [166.25, -35.85], [166.32, -35.82], [166.47, -35.47], [167.0, -35.25], [167.25, -35.35], [167.5, -35.25], [167.75, -35.35], [168.0, -35.25], [168.25, -35.35], [168.5, -35.25], [168.75, -35.35], [169.0, -35.25], [169.25, -35.35], [169.5, -35.25], [170.03, -35.47], [170.18, -35.82], [170.53, -35.97], [170.68, -36.32], [171.03, -36.47], [171.25, -37.0], [171.15, -37.25], [171.25, -37.5], [171.15, -37.75], [171.25, -38.0], [171.15, -38.25], [171.25, -38.5], [171.15, -38.75], [171.25, -39.0], [171.03, -39.53], [170.68, -39.68], [170.65, -39.75], [170.75, -40.0], [170.65, -40.25], [170.68, -40.32], [171.03, -40.47], [171.18, -40.82], [171.25, -40.85], [171.32, -40.82], [171.35, -40.75], [171.25, -40.5], [171.47, -39.97], [172.0, -39.75], [172.25, -39.85], [172.5, -39.75], [173.03, -39.97], [173.25, -40.5], [173.15, -40.75], [173.25, -41.0], [173.15, -41.25], [173.25, -41.5], [173.03, -42.03], [172.68, -42.18], [172.53, -42.53], [172.18, -42.68], [172.03, -43.03], [171.5, -43.25], [171.25, -43.15], [171.18, -43.18], [171.03, -43.53], [170.68, -43.68], [170.53, -44.03], [170.18, -44.18], [170.03, -44.53], [169.5, -44.75], [169.25, -44.65], [169.0, -44.75], [168.75, -44.65], [168.5, -44.75], [167.97, -44.53], [167.75, -44.0], [167.97, -43.47], [168.32, -43.32], [168.47, -42.97], [168.82, -42.82], [168.85, -42.75], [168.82, -42.68], [168.47, -42.53], [168.32, -42.18], [167.97, -42.03], [167.82, -41.68], [167.47, -41.53], [167.32, -41.18], [167.25, -41.15], [167.0, -41.25], [166.47, -41.03], [166.32, -40.68], [165.97, -40.53], [165.75, -40.0], [165.88, -39.7], [165.75, -39.65], [165.5, -39.75], [165.25, -39.65], [165.0, -39.75], [164.75, -39.65], [164.5, -39.75], [163.97, -39.53], [163.75, -39.0], [163.85, -38.75], [163.75, -38.5], [163.85, -38.25], [163.75, -38.0], [163.97, -37.47], [164.32, -37.32], [164.38, -37.2], [164.25, -37.15], [164.0, -37.25], [163.75, -37.15], [163.5, -37.25], [162.97, -37.03], [162.75, -36.5], [162.85, -36.25], [162.75, -36.0]]]]}, "2024-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[162.75, -36.0], [162.97, -35.47], [163.5, -35.25], [163.75, -35.35], [164.0, -35.25], [164.53, -35.47], [164.68, -35.82], [164.75, -35.85], [165.0, -35.75], [165.25, -35.85], [165.5, -35.75], [165.75, -35.85], [166.0, -35.75], [166.25, -35.85], [166.32, -35.82], [166.47, -35.47], [167.0, -35.25], [167.25, -35.35], [167.5, -35.25], [167.75, -35.35], [168.0, -35.25], [168.25, -35.35], [168.5, -35.25], [168.75, -35.35], [169.0, -35.25], [169.25, -35.35], [169.5, -35.25], [170.03, -35.47], [170.18, -35.82], [170.53, -35.97], [170.68, -36.32], [171.03, -36.47], [171.25, -37.0], [171.15, -37.25], [171.25, -37.5], [171.15, -37.75], [171.25, -38.0], [171.15, -38.25], [171.25, -38.5], [171.15, -38.75], [171.25, -39.0], [171.03, -39.53], [170.68, -39.68], [170.65, -39.75], [170.75, -40.0], [170.65, -40.25], [170.68, -40.32], [171.03, -40.47], [171.18, -40.82], [171.25, -40.85], [171.32, -40.82], [171.35, -40.75], [171.25, -40.5], [171.47, -39.97], [172.0, -39.75], [172.25, -39.85], [172.5, -39.75], [173.03, -39.97], [173.25, -40.5], [173.15, -40.75], [173.25, -41.0], [173.15, -41.25], [173.25, -41.5], [173.03, -42.03], [172.68, -42.18], [172.53, -42.53], [172.18, -42.68], [172.03, -43.03], [171.5, -43.25], [171.25, -43.15], [171.18, -43.18], [171.03, -43.53], [170.68, -43.68], [170.53, -44.03], [170.18, -44.18], [170.03, -44.53], [169.5, -44.75], [169.25, -44.65], [169.0, -44.75], [168.75, -44.65], [168.5, -44.75], [167.97, -44.53], [167.75, -44.0], [167.97, -43.47], [168.32, -43.32], [168.47, -42.97], [168.82, -42.82], [168.97, -42.47], [169.32, -42.32], [169.47, -41.97], [169.82, -41.82], [169.85, -41.75], [169.75, -41.5], [169.85, -41.25], [169.82, -41.18], [169.75, -41.15], [169.5, -41.25], [168.97, -41.03], [168.82, -40.68], [168.75, -40.65], [168.68, -40.68], [168.53, -41.03], [168.0, -41.25], [167.5, -41.04], [167.0, -41.25], [166.47, -41.03], [166.32, -40.68], [165.97, -40.53], [165.75, -40.0], [165.88, -39.7], [165.75, -39.65], [165.5, -39.75], [165.25, -39.65], [165.0, -39.75], [164.75, -39.65], [164.5, -39.75], [163.97, -39.53], [163.75, -39.0], [163.85, -38.75], [163.75, -38.5], [163.85, -38.25], [163.75, -38.0], [163.97, -37.47], [164.5, -37.25], [164.25, -37.15], [164.0, -37.25], [163.75, -37.15], [163.5, -37.25], [162.97, -37.03], [162.75, -36.5], [162.85, -36.25], [162.75, -36.0]], [[164.75, -37.35], [165.0, -37.25], [164.75, -37.15], [164.5, -37.25], [164.75, -37.35]], [[165.25, -37.35], [165.38, -37.3], [165.32, -37.18], [165.25, -37.15], [165.0, -37.25], [165.25, -37.35]]]]}, "2024-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[170.47, -41.97], [170.82, -41.82], [170.85, -41.75], [170.75, -41.5], [170.97, -40.97], [171.32, -40.82], [171.35, -40.75], [171.25, -40.5], [171.47, -39.97], [172.0, -39.75], [172.25, -39.85], [172.5, -39.75], [173.03, -39.97], [173.25, -40.5], [173.03, -41.03], [172.68, -41.18], [172.65, -41.25], [172.75, -41.5], [172.65, -41.75], [172.75, -42.0], [172.53, -42.53], [172.0, -42.75], [171.75, -42.65], [171.68, -42.68], [171.53, -43.03], [171.18, -43.18], [171.03, -43.53], [170.5, -43.75], [169.97, -43.53], [169.75, -43.0], [169.97, -42.47], [170.32, -42.32], [170.47, -41.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.3537302060230445}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1506367796833077}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.478055787373307, 15.991338120241949, 16.032914284209028, 16.44564736518953, 14.08243468142689]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.502996778908994, 4.333708677385516, 7.432668329958915, 7.4927186344422125, 11.166005558098561]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8749799635868258, -2.3365073082414236, -2.2875079521374797, -1.9307054823532708, -2.297419206549162]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.101439685054004, -6.3537302060230445, -4.142786299699026, -3.7733061005997115, -2.9542364714305336]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4798525552067703, -1.7878263497710907, -1.7592375974547874, -1.4664757023974542, -1.5795402516979133]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7038216569384994, -3.0187833691911043, -2.2783189114246216, -2.2650229666472006, -1.9871865611285338]}}