{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:52.035293", "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-18_to_2025-Mar-23_103.5_-0.5"}, "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": 2025030000514}, "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 18 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 23 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 80353.19592973292}, "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", "Malaysia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": ["South China 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": -0.5}, "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": 103.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "103.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 102.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 106.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -2.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 1.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[105.75, -0.35], [106.0, -0.25], [106.53, -0.47], [106.75, -1.0], [106.65, -1.25], [106.75, -1.5], [106.53, -2.03], [106.18, -2.18], [106.03, -2.53], [105.5, -2.75], [105.25, -2.65], [105.0, -2.75], [104.47, -2.53], [104.32, -2.18], [103.97, -2.03], [103.82, -1.68], [103.47, -1.53], [103.32, -1.18], [103.25, -1.15], [103.0, -1.25], [102.75, -1.15], [102.5, -1.25], [101.97, -1.03], [101.75, -0.5], [101.85, -0.25], [101.75, 0.0], [101.96, 0.5], [101.75, 1.0], [101.97, 1.53], [102.32, 1.68], [102.47, 2.03], [103.0, 2.25], [103.25, 2.15], [103.5, 2.25], [103.75, 2.15], [104.0, 2.25], [104.53, 2.03], [104.75, 1.5], [104.53, 0.97], [104.13, 0.8], [104.18, 0.68], [104.53, 0.53], [104.68, 0.18], [105.03, 0.03], [105.2, -0.37], [105.5, -0.25], [105.75, -0.35]]]]}}, "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": {"2025-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.75, -1.0], [104.97, -0.47], [105.5, -0.25], [105.75, -0.35], [106.0, -0.25], [106.53, -0.47], [106.75, -1.0], [106.65, -1.25], [106.75, -1.5], [106.53, -2.03], [106.0, -2.25], [105.75, -2.15], [105.5, -2.25], [104.97, -2.03], [104.75, -1.5], [104.85, -1.25], [104.75, -1.0]]]]}, "2025-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.75, 0.0], [101.96, 0.5], [101.75, 1.0], [101.97, 1.53], [102.32, 1.68], [102.47, 2.03], [103.0, 2.25], [103.25, 2.15], [103.5, 2.25], [103.75, 2.15], [104.0, 2.25], [104.53, 2.03], [104.75, 1.5], [104.53, 0.97], [104.13, 0.8], [104.18, 0.68], [104.53, 0.53], [104.68, 0.18], [105.03, 0.03], [105.2, -0.37], [105.5, -0.25], [105.75, -0.35], [106.0, -0.25], [106.53, -0.47], [106.75, -1.0], [106.65, -1.25], [106.75, -1.5], [106.53, -2.03], [106.18, -2.18], [106.03, -2.53], [105.5, -2.75], [105.25, -2.65], [105.0, -2.75], [104.47, -2.53], [104.32, -2.18], [103.97, -2.03], [103.82, -1.68], [103.47, -1.53], [103.32, -1.18], [103.25, -1.15], [103.0, -1.25], [102.75, -1.15], [102.5, -1.25], [101.97, -1.03], [101.75, -0.5], [101.85, -0.25], [101.75, 0.0]]]]}, "2025-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.75, 0.0], [101.96, 0.5], [101.75, 1.0], [101.97, 1.53], [102.32, 1.68], [102.47, 2.03], [103.0, 2.25], [103.25, 2.15], [103.5, 2.25], [103.75, 2.15], [104.0, 2.25], [104.53, 2.03], [104.75, 1.5], [104.53, 0.97], [104.13, 0.8], [104.18, 0.68], [104.53, 0.53], [104.68, 0.18], [105.03, 0.03], [105.2, -0.37], [105.5, -0.25], [105.75, -0.35], [106.0, -0.25], [106.53, -0.47], [106.75, -1.0], [106.65, -1.25], [106.75, -1.5], [106.53, -2.03], [106.18, -2.18], [106.03, -2.53], [105.5, -2.75], [105.25, -2.65], [105.0, -2.75], [104.47, -2.53], [104.32, -2.18], [103.97, -2.03], [103.82, -1.68], [103.47, -1.53], [103.32, -1.18], [103.25, -1.15], [103.0, -1.25], [102.75, -1.15], [102.5, -1.25], [101.97, -1.03], [101.75, -0.5], [101.85, -0.25], [101.75, 0.0]]]]}, "2025-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.75, 0.0], [101.96, 0.5], [101.75, 1.0], [101.97, 1.53], [102.32, 1.68], [102.47, 2.03], [103.0, 2.25], [103.25, 2.15], [103.5, 2.25], [103.75, 2.15], [104.0, 2.25], [104.53, 2.03], [104.75, 1.5], [104.53, 0.97], [104.13, 0.8], [104.18, 0.68], [104.53, 0.53], [104.68, 0.18], [105.03, 0.03], [105.25, -0.5], [105.15, -0.75], [105.18, -0.82], [105.25, -0.85], [105.5, -0.75], [106.03, -0.97], [106.25, -1.5], [106.15, -1.75], [106.25, -2.0], [106.03, -2.53], [105.5, -2.75], [105.25, -2.65], [105.0, -2.75], [104.47, -2.53], [104.32, -2.18], [103.97, -2.03], [103.82, -1.68], [103.47, -1.53], [103.32, -1.18], [103.25, -1.15], [103.0, -1.25], [102.75, -1.15], [102.5, -1.25], [101.97, -1.03], [101.75, -0.5], [101.85, -0.25], [101.75, 0.0]]]]}, "2025-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.75, 0.0], [101.96, 0.5], [101.75, 1.0], [101.97, 1.53], [102.5, 1.75], [102.75, 1.65], [103.0, 1.75], [103.53, 1.53], [103.68, 1.18], [104.03, 1.03], [104.25, 0.5], [104.15, 0.25], [104.18, 0.18], [104.53, 0.03], [104.68, -0.32], [105.03, -0.47], [105.25, -1.0], [105.15, -1.25], [105.25, -1.5], [105.03, -2.03], [104.5, -2.25], [103.97, -2.03], [103.82, -1.68], [103.47, -1.53], [103.32, -1.18], [103.25, -1.15], [103.0, -1.25], [102.75, -1.15], [102.5, -1.25], [101.97, -1.03], [101.75, -0.5], [101.85, -0.25], [101.75, 0.0]]]]}, "2025-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.5, 0.25], [101.97, 0.47], [101.75, 1.0], [101.97, 1.53], [102.5, 1.75], [102.75, 1.65], [103.0, 1.75], [103.53, 1.53], [103.68, 1.18], [104.03, 1.03], [104.25, 0.5], [104.15, 0.25], [104.25, 0.0], [104.15, -0.25], [104.25, -0.5], [104.03, -1.03], [103.5, -1.25], [102.97, -1.03], [102.75, -0.5], [102.85, -0.25], [102.75, 0.0], [102.85, 0.25], [102.82, 0.32], [102.75, 0.35], [102.5, 0.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2297541902929083}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4428186009430128}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.38984832763674, 25.442933361346945, 25.24586551372829, 26.093355405503473, 26.011322820754344, 26.423146057128918]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.305294291178427, 24.224083201090536, 23.454427337646507, 25.494616444905603, 25.33571014404299, 26.216717020670615]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.7841198202982866, -1.6946075489316264, -1.907728811077522, -1.0479713308487693, -1.1012758626366446, -1.0155591129099093]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.8590024297893137, -2.501693754429141, -3.2297541902929083, -1.542256880117975, -1.350140363094738, -1.2511431690817858]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.49459127836885, -2.6992152852782656, -2.9418478950608247, -1.605550621851035, -1.5682545970421606, -1.4244037478383382]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6194544445925338, -3.8294677395665038, -4.665292674142465, -2.3784013331304688, -2.0746892002966972, -1.5067914998732677]}}