{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:19.304812", "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": "2021-Dec-21_to_2021-Dec-24_129.0_-7.5"}, "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": 2021120000804}, "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 21 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 24 2021"}, "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": 61320.501008008105}, "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": ["Indonesia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": ["Arafura Sea", "Banda Sea", "Weber Basin"]}, "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": -7.5}, "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": 129.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 128.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 131.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -6.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[129.5, -5.75], [129.75, -5.85], [129.82, -5.82], [129.97, -5.47], [130.5, -5.25], [131.03, -5.47], [131.18, -5.82], [131.25, -5.85], [131.5, -5.75], [132.03, -5.97], [132.25, -6.5], [132.15, -6.75], [132.25, -7.0], [132.15, -7.25], [132.25, -7.5], [132.15, -7.75], [132.25, -8.0], [132.03, -8.53], [131.5, -8.75], [131.0, -8.54], [130.5, -8.75], [130.25, -8.65], [130.0, -8.75], [129.75, -8.65], [129.5, -8.75], [129.0, -8.54], [128.5, -8.75], [127.97, -8.53], [127.75, -8.0], [127.85, -7.75], [127.75, -7.5], [127.97, -6.97], [128.5, -6.75], [128.75, -6.85], [128.82, -6.82], [128.85, -6.75], [128.75, -6.5], [128.97, -5.97], [129.5, -5.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.85, -6.75], [128.75, -6.5], [128.97, -5.97], [129.5, -5.75], [129.75, -5.85], [130.0, -5.75], [130.5, -5.96], [131.0, -5.75], [131.25, -5.85], [131.5, -5.75], [132.03, -5.97], [132.25, -6.5], [132.15, -6.75], [132.25, -7.0], [132.04, -7.5], [132.25, -8.0], [132.03, -8.53], [131.5, -8.75], [131.0, -8.54], [130.5, -8.75], [130.25, -8.65], [130.0, -8.75], [129.47, -8.53], [129.32, -8.18], [129.25, -8.15], [129.0, -8.25], [128.47, -8.03], [128.25, -7.5], [128.47, -6.97], [128.82, -6.82], [128.85, -6.75]]]]}, "2021-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.75, -7.5], [127.97, -6.97], [128.5, -6.75], [128.75, -6.85], [128.82, -6.82], [128.85, -6.75], [128.75, -6.5], [128.97, -5.97], [129.5, -5.75], [129.75, -5.85], [129.82, -5.82], [129.97, -5.47], [130.5, -5.25], [131.03, -5.47], [131.18, -5.82], [131.25, -5.85], [131.5, -5.75], [132.03, -5.97], [132.25, -6.5], [132.15, -6.75], [132.25, -7.0], [132.15, -7.25], [132.25, -7.5], [132.15, -7.75], [132.25, -8.0], [132.03, -8.53], [131.5, -8.75], [131.0, -8.54], [130.5, -8.75], [130.25, -8.65], [130.0, -8.75], [129.75, -8.65], [129.5, -8.75], [129.0, -8.54], [128.5, -8.75], [127.97, -8.53], [127.75, -8.0], [127.85, -7.75], [127.75, -7.5]]]]}, "2021-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.75, -7.5], [127.97, -6.97], [128.5, -6.75], [128.75, -6.85], [128.82, -6.82], [128.85, -6.75], [128.75, -6.5], [128.97, -5.97], [129.5, -5.75], [129.75, -5.85], [129.82, -5.82], [129.97, -5.47], [130.5, -5.25], [131.03, -5.47], [131.18, -5.82], [131.25, -5.85], [131.5, -5.75], [132.03, -5.97], [132.25, -6.5], [132.15, -6.75], [132.25, -7.0], [132.15, -7.25], [132.25, -7.5], [132.15, -7.75], [132.25, -8.0], [132.03, -8.53], [131.5, -8.75], [131.0, -8.54], [130.5, -8.75], [130.25, -8.65], [130.0, -8.75], [129.75, -8.65], [129.5, -8.75], [129.0, -8.54], [128.5, -8.75], [127.97, -8.53], [127.75, -8.0], [127.85, -7.75], [127.75, -7.5]]]]}, "2021-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.75, -7.5], [127.97, -6.97], [128.5, -6.75], [128.75, -6.85], [129.0, -6.75], [129.25, -6.85], [129.5, -6.75], [129.75, -6.85], [130.0, -6.75], [130.25, -6.85], [130.38, -6.8], [130.32, -6.68], [129.97, -6.53], [129.75, -6.0], [129.97, -5.47], [130.5, -5.25], [131.03, -5.47], [131.18, -5.82], [131.25, -5.85], [131.5, -5.75], [132.03, -5.97], [132.25, -6.5], [132.04, -7.0], [132.25, -7.5], [132.03, -8.03], [131.5, -8.25], [131.2, -8.13], [131.03, -8.53], [130.5, -8.75], [130.25, -8.65], [130.0, -8.75], [129.75, -8.65], [129.5, -8.75], [129.0, -8.54], [128.5, -8.75], [127.97, -8.53], [127.75, -8.0], [127.85, -7.75], [127.75, -7.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.3033148258621736}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.8451020819419706}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.802976790987657, 26.70336984047276, 26.597705794119804, 26.690261069819087]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.653886313927956, 25.961852430728698, 25.796063892212715, 25.57676688359362]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.7392424169564644, -0.8260442188548638, -0.9368547885150861, -0.8554096284852335]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.913559089695525, -0.9427158790508656, -1.1422773705897953, -1.3033148258621736]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3274297851233139, -1.4550784611759915, -1.6829181238850304, -1.498610867518781]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5099023682104222, -1.7096649730407263, -2.0958265745238083, -1.8295097260150373]}}