{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:26.393862", "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": "2020-Apr-01_to_2020-Apr-04_105.0_34.0"}, "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": 2020040000024}, "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": "April 01 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2020"}, "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": 55700.95029080345}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": 34.0}, "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": 105.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "105.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 103.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 106.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.97, 37.03], [103.5, 37.25], [104.03, 37.03], [104.18, 36.68], [104.25, 36.65], [104.5, 36.75], [105.03, 36.53], [105.18, 36.18], [105.25, 36.15], [105.5, 36.25], [106.03, 36.03], [106.18, 35.68], [106.25, 35.65], [106.5, 35.75], [107.03, 35.53], [107.25, 35.0], [107.15, 34.75], [107.25, 34.5], [107.03, 33.97], [106.68, 33.82], [106.53, 33.47], [106.0, 33.25], [105.75, 33.35], [105.5, 33.25], [105.25, 33.35], [105.0, 33.25], [104.47, 33.47], [104.25, 34.0], [104.35, 34.25], [104.32, 34.32], [103.97, 34.47], [103.82, 34.82], [103.47, 34.97], [103.32, 35.32], [102.97, 35.47], [102.75, 36.0], [102.85, 36.25], [102.75, 36.5], [102.97, 37.03]]]]}, "2020-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.97, 37.03], [103.5, 37.25], [104.03, 37.03], [104.18, 36.68], [104.25, 36.65], [104.5, 36.75], [105.03, 36.53], [105.18, 36.18], [105.25, 36.15], [105.5, 36.25], [106.03, 36.03], [106.18, 35.68], [106.25, 35.65], [106.5, 35.75], [107.03, 35.53], [107.25, 35.0], [107.15, 34.75], [107.25, 34.5], [107.03, 33.97], [106.68, 33.82], [106.53, 33.47], [106.0, 33.25], [105.75, 33.35], [105.5, 33.25], [105.25, 33.35], [105.0, 33.25], [104.75, 33.35], [104.5, 33.25], [103.97, 33.47], [103.75, 34.0], [103.85, 34.25], [103.75, 34.5], [103.85, 34.75], [103.82, 34.82], [103.47, 34.97], [103.32, 35.32], [102.97, 35.47], [102.75, 36.0], [102.85, 36.25], [102.75, 36.5], [102.97, 37.03]]]]}, "2020-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.97, 37.03], [103.5, 37.25], [104.03, 37.03], [104.18, 36.68], [104.25, 36.65], [104.5, 36.75], [105.03, 36.53], [105.18, 36.18], [105.25, 36.15], [105.5, 36.25], [106.03, 36.03], [106.18, 35.68], [106.25, 35.65], [106.5, 35.75], [107.03, 35.53], [107.25, 35.0], [107.15, 34.75], [107.25, 34.5], [107.03, 33.97], [106.68, 33.82], [106.53, 33.47], [106.0, 33.25], [105.75, 33.35], [105.5, 33.25], [105.25, 33.35], [105.0, 33.25], [104.75, 33.35], [104.5, 33.25], [103.97, 33.47], [103.75, 34.0], [103.85, 34.25], [103.75, 34.5], [103.85, 34.75], [103.82, 34.82], [103.47, 34.97], [103.32, 35.32], [102.97, 35.47], [102.75, 36.0], [102.85, 36.25], [102.75, 36.5], [102.97, 37.03]]]]}, "2020-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.85, 34.75], [103.75, 35.0], [103.97, 35.53], [104.5, 35.75], [105.03, 35.53], [105.18, 35.18], [105.53, 35.03], [105.75, 34.5], [105.65, 34.25], [105.75, 34.0], [105.53, 33.47], [105.0, 33.25], [104.75, 33.35], [104.5, 33.25], [103.97, 33.47], [103.75, 34.0], [103.85, 34.25], [103.75, 34.5], [103.85, 34.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.10171129384537}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.525069726250535}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.7089807210404047, 1.9101365584820655, 1.8856647087485499, 0.9778029075841346]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.9530110734596065, -1.9679873088604722, -3.3719396931745678, -1.942353776663765]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.1309041633806824, -5.696245043532178, -5.814239715981423, -5.076212626874804]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.047460787852856, -6.202993245596531, -8.10171129384537, -5.481746541692814]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5347663225289998, -1.675501257136406, -1.688029410489103, -1.434058727845913]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.732210306656085, -1.8964293427924248, -2.3078313313489422, -1.545302914262741]}}