{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:36.483557", "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-Jun-01_to_2025-Jun-04_102.0_33.5"}, "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": 2025060000077}, "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": "June 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 04 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": 122138.54002182004}, "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": ["China"]}, "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": []}, "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": 33.5}, "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": 102.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "102.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 99.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 104.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[98.47, 35.47], [98.25, 36.0], [98.35, 36.25], [98.25, 36.5], [98.47, 37.03], [99.0, 37.25], [99.25, 37.15], [99.5, 37.25], [100.03, 37.03], [100.18, 36.68], [100.25, 36.65], [100.5, 36.75], [101.03, 36.53], [101.18, 36.18], [101.25, 36.15], [101.5, 36.25], [101.75, 36.15], [102.0, 36.25], [102.53, 36.03], [102.68, 35.68], [102.75, 35.65], [103.0, 35.75], [103.25, 35.65], [103.5, 35.75], [104.03, 35.53], [104.18, 35.18], [104.53, 35.03], [104.75, 34.5], [104.65, 34.25], [104.68, 34.18], [105.03, 34.03], [105.25, 33.5], [105.03, 32.97], [104.5, 32.75], [104.25, 32.85], [104.0, 32.75], [103.75, 32.85], [103.5, 32.75], [103.25, 32.85], [103.18, 32.82], [103.03, 32.47], [102.5, 32.25], [102.25, 32.35], [102.0, 32.25], [101.75, 32.35], [101.5, 32.25], [100.97, 32.47], [100.82, 32.82], [100.47, 32.97], [100.32, 33.32], [99.97, 33.47], [99.82, 33.82], [99.75, 33.85], [99.5, 33.75], [98.97, 33.97], [98.75, 34.5], [98.85, 34.75], [98.75, 35.0], [98.85, 35.25], [98.82, 35.32], [98.47, 35.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "Tibetan-Plateau", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-06-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.25, 36.5], [98.47, 37.03], [99.0, 37.25], [99.25, 37.15], [99.5, 37.25], [100.03, 37.03], [100.18, 36.68], [100.25, 36.65], [100.5, 36.75], [101.03, 36.53], [101.18, 36.18], [101.25, 36.15], [101.5, 36.25], [101.75, 36.15], [102.0, 36.25], [102.53, 36.03], [102.68, 35.68], [102.75, 35.65], [103.0, 35.75], [103.25, 35.65], [103.5, 35.75], [104.03, 35.53], [104.18, 35.18], [104.53, 35.03], [104.75, 34.5], [104.65, 34.25], [104.68, 34.18], [105.03, 34.03], [105.25, 33.5], [105.03, 32.97], [104.5, 32.75], [104.25, 32.85], [104.0, 32.75], [103.75, 32.85], [103.5, 32.75], [103.25, 32.85], [103.18, 32.82], [103.03, 32.47], [102.5, 32.25], [102.25, 32.35], [102.0, 32.25], [101.47, 32.47], [101.32, 32.82], [100.97, 32.97], [100.75, 33.5], [100.97, 34.03], 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[99.75, 33.85], [99.5, 33.75], [98.97, 33.97], [98.75, 34.5], [98.85, 34.75], [98.75, 35.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.784747502102675}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.309918870453763}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.2534086048093513, 1.75426974826388, 1.6603107876247805, 0.27072659447077285]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.051677449544229, -3.5975606282551666, -4.620422108968057, -2.076144917805948]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.527744043813211, -5.5337289076458624, -5.854619674039506, -4.853940147714131]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.951632573314441, -7.2436089371099115, -7.784747502102675, -6.988157811532176]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7727763740046907, -2.1793467258011807, -2.3761251833301738, -1.8985473595911]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.224768662157964, -2.939612656120625, -3.2577598829592955, -2.81120859954863]}}