{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:53.598532", "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-Aug-11_to_2025-Aug-14_106.5_-6.0"}, "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": 2025080000426}, "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": "August 11 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 14 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": 64724.66233648782}, "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": ["Java Sea", "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": -6.0}, "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": 106.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "106.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 106.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 109.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -6.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -2.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[105.97, -6.53], [105.75, -6.0], [105.96, -5.5], [105.75, -5.0], [105.97, -4.47], [106.32, -4.32], [106.35, -4.25], [106.25, -4.0], [106.47, -3.47], [106.82, -3.32], [106.97, -2.97], [107.5, -2.75], [107.75, -2.85], [107.82, -2.82], [107.85, -2.75], [107.75, -2.5], [107.97, -1.97], [108.5, -1.75], [108.75, -1.85], [109.0, -1.75], [109.53, -1.97], [109.75, -2.5], [109.65, -2.75], [109.75, -3.0], [109.53, -3.53], [109.18, -3.68], [109.15, -3.75], [109.25, -4.0], [109.03, -4.53], [108.68, -4.68], [108.53, -5.03], [108.18, -5.18], [108.15, -5.25], [108.25, -5.5], [108.03, -6.03], [107.68, -6.18], [107.53, -6.53], [107.0, -6.75], [106.75, -6.65], [106.5, -6.75], [105.97, -6.53]]]]}}, "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": {"2025-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.75, -5.0], [105.97, -4.47], [106.32, -4.32], [106.35, -4.25], [106.25, -4.0], [106.47, -3.47], [106.82, -3.32], [106.97, -2.97], [107.5, -2.75], [107.75, -2.85], [107.82, -2.82], [107.85, -2.75], [107.75, -2.5], [107.97, -1.97], [108.5, -1.75], [108.75, -1.85], [109.0, -1.75], [109.53, -1.97], [109.75, -2.5], [109.65, -2.75], [109.75, -3.0], [109.53, -3.53], [109.18, -3.68], [109.15, -3.75], [109.25, -4.0], [109.03, -4.53], [108.68, -4.68], [108.53, -5.03], [108.18, -5.18], [108.15, -5.25], [108.25, -5.5], [108.03, -6.03], [107.68, -6.18], [107.53, -6.53], [107.0, -6.75], [106.75, -6.65], [106.5, -6.75], [105.97, -6.53], [105.75, -6.0], [105.96, -5.5], [105.75, -5.0]]]]}, "2025-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.75, -5.0], [105.97, -4.47], [106.32, -4.32], [106.35, -4.25], [106.25, -4.0], [106.47, -3.47], [106.82, -3.32], [106.97, -2.97], [107.5, -2.75], [107.75, -2.85], [107.82, -2.82], [107.85, -2.75], [107.75, -2.5], [107.97, -1.97], [108.5, -1.75], [108.75, -1.85], [109.0, -1.75], [109.53, -1.97], [109.75, -2.5], [109.65, -2.75], [109.75, -3.0], [109.53, -3.53], [109.18, -3.68], [109.15, -3.75], [109.25, -4.0], [109.03, -4.53], [108.68, -4.68], [108.53, -5.03], [108.18, -5.18], [108.15, -5.25], [108.25, -5.5], [108.03, -6.03], [107.68, -6.18], [107.53, -6.53], [107.0, -6.75], [106.75, -6.65], [106.5, -6.75], [105.97, -6.53], [105.75, -6.0], [105.96, -5.5], [105.75, -5.0]]]]}, "2025-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.75, -5.0], [105.97, -4.47], [106.32, -4.32], [106.35, -4.25], [106.25, -4.0], [106.47, -3.47], [106.82, -3.32], [106.97, -2.97], [107.5, -2.75], [107.75, -2.85], [107.82, -2.82], [107.85, -2.75], [107.75, -2.5], [107.97, -1.97], [108.5, -1.75], [108.75, -1.85], [109.0, -1.75], [109.53, -1.97], [109.75, -2.5], [109.65, -2.75], [109.75, -3.0], [109.53, -3.53], [109.18, -3.68], [109.15, -3.75], [109.25, -4.0], [109.03, -4.53], [108.68, -4.68], [108.53, -5.03], [108.18, -5.18], [108.15, -5.25], [108.25, -5.5], [108.03, -6.03], [107.68, -6.18], [107.53, -6.53], [107.0, -6.75], [106.75, -6.65], [106.5, -6.75], [105.97, -6.53], [105.75, -6.0], [105.96, -5.5], [105.75, -5.0]]]]}, "2025-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.97, -5.47], [106.5, -5.25], [107.03, -5.47], [107.25, -6.0], [107.03, -6.53], [106.5, -6.75], [105.97, -6.53], [105.75, -6.0], [105.97, -5.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.6970520840915242}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.8562691838357459}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.619816988990465, 26.33291748289082, 26.308236209929987, 26.762291208903036]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.433967844645224, 25.945648447672568, 25.93611551920577, 26.762291208903036]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.6703138478500819, -0.9435244160040058, -0.9449186788564167, -1.0673319685671459]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.9546471240291794, -1.6970520840915242, -1.337442018233446, -1.0673319685671459]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6221349979554742, -2.338734755646931, -2.3926024900191005, -2.0120476435831707]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.293177424107084, -3.2826956113220485, -3.3589254947937373, -2.0120476435831707]}}