{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:52.965128", "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": "2025-Mar-21_to_2025-Mar-24_166.0_-15.0"}, "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": 2025030000575}, "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": "March 21 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 24 2025"}, "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": 62970.730646093936}, "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": ["Vanuatu"]}, "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": ["Coral 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": -15.0}, "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": 166.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "166.0\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": 167.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -15.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[167.03, -13.97], [167.18, -14.32], [167.53, -14.47], [167.75, -15.0], [167.53, -15.53], [167.0, -15.75], [166.7, -15.63], [166.53, -16.03], [166.0, -16.25], [165.47, -16.03], [165.32, -15.68], [165.25, -15.65], [165.0, -15.75], [164.47, -15.53], [164.32, -15.18], [164.25, -15.15], [164.0, -15.25], [163.47, -15.03], [163.25, -14.5], [163.47, -13.97], [163.82, -13.82], [163.85, -13.75], [163.82, -13.68], [163.75, -13.65], [163.5, -13.75], [162.97, -13.53], [162.75, -13.0], [162.85, -12.75], [162.75, -12.5], [162.97, -11.97], [163.5, -11.75], [163.75, -11.85], [164.0, -11.75], [164.53, -11.97], [164.7, -12.37], [165.0, -12.25], [165.53, -12.47], [165.68, -12.82], [166.03, -12.97], [166.25, -13.5], [166.15, -13.75], [166.2, -13.87], [166.5, -13.75], [167.03, -13.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[163.5, -13.75], [162.97, -13.53], [162.75, -13.0], [162.97, -12.47], [163.5, -12.25], [163.75, -12.35], [164.0, -12.25], [164.5, -12.46], [165.0, -12.25], [165.53, -12.47], [165.68, -12.82], [166.03, -12.97], [166.25, -13.5], [166.15, -13.75], [166.25, -14.0], [166.15, -14.25], [166.18, -14.32], [166.53, -14.47], [166.75, -15.0], [166.65, -15.25], [166.75, -15.5], [166.53, -16.03], [166.0, -16.25], [165.47, -16.03], [165.32, -15.68], [165.25, -15.65], [165.0, -15.75], [164.47, -15.53], [164.32, -15.18], [164.25, -15.15], [164.0, -15.25], [163.47, -15.03], [163.25, -14.5], [163.47, -13.97], [163.82, -13.82], [163.85, -13.75], [163.82, -13.68], [163.75, -13.65], [163.5, -13.75]]]]}, "2025-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[162.75, -12.5], [162.97, -11.97], [163.5, -11.75], [163.75, -11.85], [164.0, -11.75], [164.53, -11.97], [164.7, -12.37], [165.0, -12.25], [165.53, -12.47], [165.68, -12.82], [166.03, -12.97], [166.25, -13.5], [166.15, -13.75], [166.2, -13.87], [166.5, -13.75], [167.03, -13.97], [167.18, -14.32], [167.53, -14.47], [167.75, -15.0], [167.53, -15.53], [167.0, -15.75], [166.7, -15.63], [166.53, -16.03], [166.0, -16.25], [165.47, -16.03], [165.32, -15.68], [165.25, -15.65], [165.0, -15.75], [164.47, -15.53], [164.32, -15.18], [164.25, -15.15], [164.0, -15.25], [163.47, -15.03], [163.25, -14.5], [163.47, -13.97], [163.82, -13.82], [163.85, -13.75], [163.82, -13.68], [163.75, -13.65], [163.5, -13.75], [162.97, -13.53], [162.75, -13.0], [162.85, -12.75], [162.75, -12.5]]]]}, "2025-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[162.75, -12.5], [162.97, -11.97], [163.5, -11.75], [163.75, -11.85], [164.0, -11.75], [164.53, -11.97], [164.7, -12.37], [165.0, -12.25], [165.53, -12.47], [165.68, -12.82], [166.03, -12.97], [166.25, -13.5], [166.15, -13.75], [166.2, -13.87], [166.5, -13.75], [167.03, -13.97], [167.18, -14.32], [167.53, -14.47], [167.75, -15.0], [167.53, -15.53], [167.0, -15.75], [166.7, -15.63], [166.53, -16.03], [166.0, -16.25], [165.47, -16.03], [165.32, -15.68], [165.25, -15.65], [165.0, -15.75], [164.47, -15.53], [164.32, -15.18], [164.25, -15.15], [164.0, -15.25], [163.47, -15.03], [163.25, -14.5], [163.47, -13.97], [163.82, -13.82], [163.85, -13.75], [163.82, -13.68], [163.75, -13.65], [163.5, -13.75], [162.97, -13.53], [162.75, -13.0], [162.85, -12.75], [162.75, -12.5]]]]}, "2025-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[165.75, -14.5], [165.97, -13.97], [166.5, -13.75], [167.03, -13.97], [167.18, -14.32], [167.53, -14.47], [167.75, -15.0], [167.53, -15.53], [167.0, -15.75], [166.47, -15.53], [166.32, -15.18], [165.97, -15.03], [165.75, -14.5]]], [[[162.97, -13.03], [162.75, -12.5], [162.97, -11.97], [163.5, -11.75], [163.75, -11.85], [164.0, -11.75], [164.53, -11.97], [164.75, -12.5], [164.53, -13.03], [164.0, -13.25], [163.75, -13.15], [163.5, -13.25], [162.97, -13.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.2594811867335238}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.9164100547635996}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.621952535591902, 26.352203199598534, 26.43399442642459, 26.261533355712913]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.54409561157229, 25.22804412841799, 25.295086161295615, 25.300839996337913]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.799888076460962, -1.010303719947003, -0.9341347476051608, -0.8256320829187445]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.8743190714955063, -1.2594811867335238, -1.2389151867663486, -0.9085283421838426]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.397239413034898, -1.7367916025264405, -1.5480009003950959, -1.3939366033972174]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4934760885706755, -2.1349674910632794, -2.078523746238007, -1.4667932448507035]}}