{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:15.109647", "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": "2026-Feb-17_to_2026-Feb-19_104.0_1.5"}, "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": 2026020000408}, "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": "February 17 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 19 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 61715.90662913868}, "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": ["Malaysia"]}, "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": 1.5}, "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": 104.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "104.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 101.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 104.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[101.5, 5.75], [101.75, 5.65], [102.0, 5.75], [102.53, 5.53], [102.75, 5.0], [102.65, 4.75], [102.68, 4.68], [102.75, 4.65], [103.0, 4.75], [103.53, 4.53], [103.75, 4.0], [103.65, 3.75], [103.75, 3.5], [103.65, 3.25], [103.75, 3.0], [103.65, 2.75], [103.68, 2.68], [104.03, 2.53], [104.18, 2.18], [104.53, 2.03], [104.75, 1.5], [104.53, 0.97], [104.0, 0.75], [103.75, 0.85], [103.5, 0.75], [103.25, 0.85], [103.0, 0.75], [102.47, 0.97], [102.32, 1.32], [101.97, 1.47], [101.75, 2.0], [101.85, 2.25], [101.75, 2.5], [101.85, 2.75], [101.82, 2.82], [101.47, 2.97], [101.25, 3.5], [101.35, 3.75], [101.32, 3.82], [100.97, 3.97], [100.75, 4.5], [100.85, 4.75], [100.75, 5.0], [100.97, 5.53], [101.5, 5.75]]]]}}, "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": {"2026-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.75, 5.0], [100.97, 5.53], [101.5, 5.75], [101.75, 5.65], [102.0, 5.75], [102.53, 5.53], [102.75, 5.0], [102.65, 4.75], [102.68, 4.68], [102.75, 4.65], [103.0, 4.75], [103.53, 4.53], [103.75, 4.0], [103.65, 3.75], [103.75, 3.5], [103.65, 3.25], [103.75, 3.0], [103.65, 2.75], [103.68, 2.68], [104.03, 2.53], [104.18, 2.18], [104.53, 2.03], [104.75, 1.5], [104.53, 0.97], [104.0, 0.75], [103.75, 0.85], [103.5, 0.75], [103.25, 0.85], [103.0, 0.75], [102.47, 0.97], [102.32, 1.32], [101.97, 1.47], [101.75, 2.0], [101.85, 2.25], [101.75, 2.5], [101.85, 2.75], [101.82, 2.82], [101.47, 2.97], [101.25, 3.5], [101.35, 3.75], [101.32, 3.82], [100.97, 3.97], [100.75, 4.5], [100.85, 4.75], [100.75, 5.0]]]]}, "2026-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.75, 5.0], [100.97, 5.53], [101.5, 5.75], [101.75, 5.65], [102.0, 5.75], [102.53, 5.53], [102.75, 5.0], [102.65, 4.75], [102.68, 4.68], [102.75, 4.65], [103.0, 4.75], [103.53, 4.53], [103.75, 4.0], [103.65, 3.75], [103.75, 3.5], [103.65, 3.25], [103.75, 3.0], [103.65, 2.75], [103.68, 2.68], [104.03, 2.53], [104.18, 2.18], [104.53, 2.03], [104.75, 1.5], [104.53, 0.97], [104.0, 0.75], [103.75, 0.85], [103.5, 0.75], [103.25, 0.85], [103.0, 0.75], [102.47, 0.97], [102.32, 1.32], [101.97, 1.47], [101.75, 2.0], [101.85, 2.25], [101.75, 2.5], [101.85, 2.75], [101.82, 2.82], [101.47, 2.97], [101.25, 3.5], [101.35, 3.75], [101.32, 3.82], [100.97, 3.97], [100.75, 4.5], [100.85, 4.75], [100.75, 5.0]]]]}, "2026-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.75, 5.0], [100.97, 5.53], [101.5, 5.75], [101.75, 5.65], [102.0, 5.75], [102.53, 5.53], [102.75, 5.0], [102.65, 4.75], [102.68, 4.68], [102.75, 4.65], [103.0, 4.75], [103.53, 4.53], [103.75, 4.0], [103.65, 3.75], [103.75, 3.5], [103.65, 3.25], [103.75, 3.0], [103.65, 2.75], [103.68, 2.68], [104.03, 2.53], [104.18, 2.18], [104.53, 2.03], [104.75, 1.5], [104.53, 0.97], [104.0, 0.75], [103.75, 0.85], [103.5, 0.75], [103.25, 0.85], [103.0, 0.75], [102.47, 0.97], [102.32, 1.32], [101.97, 1.47], [101.75, 2.0], [101.85, 2.25], [101.75, 2.5], [101.85, 2.75], [101.82, 2.82], [101.47, 2.97], [101.25, 3.5], [101.35, 3.75], [101.32, 3.82], [100.97, 3.97], [100.75, 4.5], [100.85, 4.75], [100.75, 5.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.519741303109356}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.636618900827503}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.142954762776753, 24.677053324381575, 24.28882497151693]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.619618988037132, 20.862290954589866, 21.118313090006552]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8517446404603333, -1.3306135167740394, -1.727498545248136]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.519741303109356, -2.0203931951163554, -2.1451249083135053]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.083557902988304, -1.4624441897413747, -1.974875058049399]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.060759520975966, -1.8383950801411275, -3.304367449253652]}}