{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:02.779765", "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": "2022-May-12_to_2022-May-15_81.5_5.5"}, "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": 2022050000504}, "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": "May 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 15 2022"}, "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": 98289.02501585202}, "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": ["Sri Lanka"]}, "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", "Laccadive 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": 5.5}, "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": 81.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "81.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 76.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 81.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 7.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[82.15, 5.25], [82.25, 5.0], [82.03, 4.47], [81.5, 4.25], [80.97, 4.47], [80.82, 4.82], [80.75, 4.85], [80.5, 4.75], [79.97, 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step", "value": {"2022-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 8.03], [77.0, 8.25], [77.25, 8.15], [77.5, 8.25], [77.75, 8.15], [78.0, 8.25], [78.25, 8.15], [78.5, 8.25], [79.0, 8.04], [79.5, 8.25], [80.03, 8.03], [80.25, 7.5], [80.15, 7.25], [80.25, 7.0], [80.15, 6.75], [80.18, 6.68], [80.5, 6.54], [81.0, 6.75], [81.25, 6.65], [81.5, 6.75], [82.03, 6.53], [82.25, 6.0], [82.15, 5.75], [82.25, 5.5], [82.15, 5.25], [82.25, 5.0], [82.03, 4.47], [81.5, 4.25], [80.97, 4.47], [80.82, 4.82], [80.75, 4.85], [80.5, 4.75], [79.97, 4.97], [79.82, 5.32], [79.75, 5.35], [79.5, 5.25], [79.25, 5.35], [79.18, 5.32], [79.03, 4.97], [78.5, 4.75], [78.25, 4.85], [78.0, 4.75], [77.75, 4.85], [77.5, 4.75], [76.97, 4.97], [76.75, 5.5], [76.85, 5.75], [76.75, 6.0], [76.85, 6.25], [76.82, 6.32], [76.75, 6.35], [76.5, 6.25], [75.97, 6.47], [75.75, 7.0], [75.97, 7.53], [76.32, 7.68], [76.47, 8.03]]]]}, "2022-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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[81.0, 4.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4939951992510032}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0155504552637573}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.083239744812374, 26.838357970924676, 26.963218806920622, 26.992617171390123]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.72543872999171, 26.621812695895585, 26.613619009478555, 26.82512858139745]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9324771347521388, -1.143698761327645, -0.987975745981478, -0.7355460349439227]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1769044666727382, -1.4939951992510032, -1.397087235076583, -0.8049979282118329]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6774459995484046, -2.036962577409972, -1.7419961199613787, -1.4246331370458933]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3786707159871225, -2.6750961749064395, -2.433565093522578, -1.545989440865299]}}