{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:49.781025", "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-Nov-20_to_2025-Nov-28_98.0_4.5"}, "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": 2025110000572}, "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": "November 20 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 28 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 104874.42002377319}, "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": ["Indian Ocean"]}, "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": 4.5}, "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": 98.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "98.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 95.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 99.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[96.0, 6.04], [96.5, 6.25], [97.03, 6.03], [97.18, 5.68], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.68, 4.68], [99.03, 4.53], [99.18, 4.18], [99.53, 4.03], [99.68, 3.68], [100.03, 3.53], [100.25, 3.0], [100.03, 2.47], [99.68, 2.32], [99.65, 2.25], [99.68, 2.18], [100.03, 2.03], [100.25, 1.5], [100.15, 1.25], [100.25, 1.0], [100.03, 0.47], [99.5, 0.25], [99.25, 0.35], [99.0, 0.25], [98.47, 0.47], [98.25, 1.0], [98.35, 1.25], [98.32, 1.32], [97.97, 1.47], [97.82, 1.82], [97.47, 1.97], [97.32, 2.32], [96.97, 2.47], [96.82, 2.82], [96.47, 2.97], [96.32, 3.32], [95.97, 3.47], [95.82, 3.82], [95.47, 3.97], [95.25, 4.5], [95.35, 4.75], [95.32, 4.82], [94.97, 4.97], [94.75, 5.5], [94.97, 6.03], [95.5, 6.25], [96.0, 6.04]]]]}}, "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": {"2025-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.5, 4.75], [95.97, 4.97], [95.75, 5.5], [95.97, 6.03], [96.5, 6.25], [97.03, 6.03], [97.2, 5.63], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.75, 4.5], [98.53, 3.97], [98.0, 3.75], [97.47, 3.97], [97.32, 4.32], [96.97, 4.47], [96.8, 4.87], [96.5, 4.75]]]]}, "2025-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.47, 0.47], [98.25, 1.0], [98.47, 1.53], [99.0, 1.75], [99.25, 1.65], [99.5, 1.75], [100.03, 1.53], [100.25, 1.0], [100.03, 0.47], [99.5, 0.25], [99.25, 0.35], [99.0, 0.25], [98.47, 0.47]]], [[[95.47, 5.53], [95.82, 5.68], [95.97, 6.03], [96.5, 6.25], [97.03, 6.03], [97.18, 5.68], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.75, 4.5], [98.53, 3.97], [98.0, 3.75], [97.47, 3.97], [97.32, 4.32], [97.25, 4.35], [97.0, 4.25], [96.75, 4.35], [96.68, 4.32], [96.53, 3.97], [96.0, 3.75], [95.47, 3.97], [95.25, 4.5], [95.35, 4.75], [95.25, 5.0], [95.47, 5.53]]]]}, "2025-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.47, 0.47], [98.25, 1.0], [98.47, 1.53], [99.0, 1.75], [99.25, 1.65], [99.5, 1.75], [100.03, 1.53], [100.25, 1.0], [100.03, 0.47], [99.5, 0.25], [99.25, 0.35], [99.0, 0.25], [98.47, 0.47]]], [[[94.75, 5.5], [94.97, 6.03], [95.5, 6.25], [96.0, 6.04], [96.5, 6.25], [97.03, 6.03], [97.18, 5.68], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.75, 4.5], [98.53, 3.97], [98.13, 3.8], [98.2, 3.63], [98.5, 3.75], [99.03, 3.53], [99.25, 3.0], [99.03, 2.47], [98.5, 2.25], [97.97, 2.47], [97.8, 2.87], [97.5, 2.75], [96.97, 2.97], [96.75, 3.5], [96.97, 4.03], [97.38, 4.2], [97.32, 4.32], [97.25, 4.35], [97.0, 4.25], [96.75, 4.35], [96.68, 4.32], [96.53, 3.97], [96.0, 3.75], [95.47, 3.97], [95.25, 4.5], [95.35, 4.75], [95.32, 4.82], [94.97, 4.97], [94.75, 5.5]]]]}, "2025-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.47, 0.47], [98.25, 1.0], [98.47, 1.53], [99.0, 1.75], [99.25, 1.65], [99.5, 1.75], [100.03, 1.53], [100.25, 1.0], [100.03, 0.47], [99.5, 0.25], [99.25, 0.35], [99.0, 0.25], [98.47, 0.47]]], [[[94.75, 5.5], [94.97, 6.03], [95.5, 6.25], [96.03, 6.03], [96.18, 5.68], [96.25, 5.65], [96.5, 5.75], [96.75, 5.65], [97.0, 5.75], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.75, 4.5], [98.65, 4.25], [98.68, 4.18], [98.75, 4.15], [99.0, 4.25], [99.53, 4.03], [99.75, 3.5], [99.53, 2.97], [99.18, 2.82], [99.03, 2.47], [98.5, 2.25], [97.97, 2.47], [97.82, 2.82], [97.75, 2.85], [97.5, 2.75], [96.97, 2.97], [96.75, 3.5], [96.85, 3.75], [96.82, 3.82], [96.75, 3.85], [96.5, 3.75], [96.25, 3.85], [96.0, 3.75], [95.47, 3.97], [95.25, 4.5], [95.35, 4.75], [95.32, 4.82], [94.97, 4.97], [94.75, 5.5]]]]}, "2025-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.97, 4.97], [94.75, 5.5], [94.97, 6.03], [95.5, 6.25], [96.03, 6.03], [96.18, 5.68], [96.25, 5.65], [96.5, 5.75], [96.75, 5.65], [97.0, 5.75], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.68, 4.68], [99.03, 4.53], [99.18, 4.18], [99.53, 4.03], [99.68, 3.68], [100.03, 3.53], [100.25, 3.0], [100.03, 2.47], [99.5, 2.25], [99.2, 2.37], [99.15, 2.25], [99.18, 2.18], [99.53, 2.03], [99.68, 1.68], [100.03, 1.53], [100.25, 1.0], [100.03, 0.47], [99.5, 0.25], [99.25, 0.35], [99.0, 0.25], [98.47, 0.47], [98.25, 1.0], [98.35, 1.25], [98.32, 1.32], [97.97, 1.47], [97.82, 1.82], [97.47, 1.97], [97.32, 2.32], [96.97, 2.47], [96.82, 2.82], [96.47, 2.97], [96.32, 3.32], [95.97, 3.47], [95.75, 4.0], [95.85, 4.25], [95.82, 4.32], [95.47, 4.47], [95.32, 4.82], [94.97, 4.97]]]]}, "2025-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.97, 4.97], [94.75, 5.5], [94.97, 6.03], [95.5, 6.25], [96.03, 6.03], [96.18, 5.68], [96.25, 5.65], [96.5, 5.75], [96.75, 5.65], [97.0, 5.75], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.68, 4.68], [99.03, 4.53], [99.18, 4.18], [99.53, 4.03], [99.68, 3.68], [100.03, 3.53], [100.25, 3.0], [100.03, 2.47], [99.68, 2.32], [99.65, 2.25], [99.68, 2.18], [100.03, 2.03], [100.25, 1.5], [100.15, 1.25], [100.25, 1.0], [100.03, 0.47], [99.5, 0.25], [99.25, 0.35], [99.0, 0.25], [98.47, 0.47], [98.25, 1.0], [98.35, 1.25], [98.32, 1.32], [97.97, 1.47], [97.82, 1.82], [97.47, 1.97], [97.32, 2.32], [96.97, 2.47], [96.82, 2.82], [96.47, 2.97], [96.32, 3.32], [95.97, 3.47], [95.82, 3.82], [95.47, 3.97], [95.25, 4.5], [95.35, 4.75], [95.32, 4.82], [94.97, 4.97]]]]}, "2025-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.97, 4.97], [94.75, 5.5], [94.97, 6.03], [95.5, 6.25], [96.03, 6.03], [96.18, 5.68], [96.25, 5.65], [96.5, 5.75], [96.75, 5.65], [97.0, 5.75], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.68, 4.68], [99.03, 4.53], [99.18, 4.18], [99.53, 4.03], [99.68, 3.68], [100.03, 3.53], [100.25, 3.0], [100.03, 2.47], [99.68, 2.32], [99.65, 2.25], [99.68, 2.18], [100.03, 2.03], [100.25, 1.5], [100.03, 0.97], [99.68, 0.82], [99.53, 0.47], [99.0, 0.25], [98.47, 0.47], [98.25, 1.0], [98.35, 1.25], [98.32, 1.32], [97.97, 1.47], [97.82, 1.82], [97.47, 1.97], [97.32, 2.32], [96.97, 2.47], [96.82, 2.82], [96.47, 2.97], [96.32, 3.32], [95.97, 3.47], [95.82, 3.82], [95.47, 3.97], [95.25, 4.5], [95.35, 4.75], [95.32, 4.82], [94.97, 4.97]]]]}, "2025-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.97, 4.97], [94.75, 5.5], [94.97, 6.03], [95.5, 6.25], [96.03, 6.03], [96.18, 5.68], [96.25, 5.65], [96.5, 5.75], [96.75, 5.65], [97.0, 5.75], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.68, 4.68], [99.03, 4.53], [99.18, 4.18], [99.53, 4.03], [99.68, 3.68], [100.03, 3.53], [100.25, 3.0], [100.03, 2.47], [99.68, 2.32], [99.65, 2.25], [99.68, 2.18], [100.03, 2.03], [100.25, 1.5], [100.03, 0.97], [99.68, 0.82], [99.53, 0.47], [99.0, 0.25], [98.47, 0.47], [98.25, 1.0], [98.35, 1.25], [98.32, 1.32], [97.97, 1.47], [97.82, 1.82], [97.47, 1.97], [97.32, 2.32], [96.97, 2.47], [96.82, 2.82], [96.47, 2.97], [96.32, 3.32], [95.97, 3.47], [95.82, 3.82], [95.47, 3.97], [95.25, 4.5], [95.35, 4.75], [95.32, 4.82], [94.97, 4.97]]]]}, "2025-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.25, 4.5], [96.35, 4.75], [96.25, 5.0], [96.47, 5.53], [97.0, 5.75], [97.25, 5.65], [97.5, 5.75], [98.03, 5.53], [98.18, 5.18], [98.53, 5.03], [98.68, 4.68], [99.03, 4.53], [99.18, 4.18], [99.53, 4.03], [99.68, 3.68], [100.03, 3.53], [100.25, 3.0], [100.03, 2.47], [99.68, 2.32], [99.65, 2.25], [99.68, 2.18], [100.03, 2.03], [100.25, 1.5], [100.03, 0.97], [99.68, 0.82], [99.53, 0.47], [99.0, 0.25], [98.47, 0.47], [98.25, 1.0], [98.35, 1.25], [98.32, 1.32], [97.97, 1.47], [97.82, 1.82], [97.47, 1.97], [97.25, 2.5], [97.38, 2.8], [96.97, 2.97], [96.82, 3.32], [96.47, 3.47], [96.25, 4.0], [96.35, 4.25], [96.25, 4.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.421205694796072}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5157817408128815}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.624440341525656, 23.57028181287984, 22.676555887858058, 21.79474999946467, 21.971655694369645, 21.772833837644043, 22.00570449829104, 21.15974833170577, 21.7028178118278]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.157833353678427, 20.57185516357424, 17.248801167805993, 17.288162485758505, 16.841475423177087, 16.517302449544275, 16.701446787516318, 15.954883829752646, 17.236675516764365]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0304385962538352, -1.0947032958684038, -1.0687524898536982, -1.3041667639613959, -1.4009628766828208, -1.5452236111605038, -1.3328325965225893, -2.2003409260087654, -1.556538916429714]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1541980610575706, -1.2440338440853225, -1.4690063199568613, -2.0998233351614317, -2.5528592397530474, -2.6647326693768036, -2.154558205949229, -3.421205694796072, -2.9935309234802503]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.517132411703568, -1.621750686414284, -1.6461321392826482, -1.9529929145940086, -2.1360964257295287, -2.447420146254749, -2.075307045264829, -3.4437371682767695, -2.3680969239793996]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.635606333616253, -1.9266210860953503, -1.9791873750746898, -2.7940998691180594, -3.490589305779066, -3.7467512844571984, -2.9505616737258804, -5.085469679234777, -4.230476179389485]}}