{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:22.794552", "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": "2023-Apr-09_to_2023-Apr-15_121.0_14.5"}, "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": 2023040000439}, "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": "April 09 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 15 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 59987.94982883834}, "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": ["Philippines"]}, "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": ["Philippine 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": 14.5}, "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": 121.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 119.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 123.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[121.47, 12.97], [121.32, 13.32], [121.25, 13.35], [121.18, 13.32], [121.03, 12.97], [120.68, 12.82], [120.53, 12.47], [120.0, 12.25], [119.75, 12.35], [119.5, 12.25], [118.97, 12.47], [118.75, 13.0], [118.85, 13.25], [118.75, 13.5], [118.97, 14.03], [119.32, 14.18], [119.35, 14.25], [119.25, 14.5], [119.35, 14.75], [119.25, 15.0], [119.47, 15.53], [120.0, 15.75], [120.5, 15.54], [121.0, 15.75], [121.25, 15.65], [121.5, 15.75], [122.03, 15.53], [122.25, 15.0], [122.15, 14.75], [122.2, 14.63], [122.5, 14.75], [123.03, 14.53], [123.18, 14.18], [123.53, 14.03], [123.68, 13.68], [124.03, 13.53], [124.25, 13.0], [124.03, 12.47], [123.5, 12.25], [122.97, 12.47], [122.82, 12.82], [122.5, 12.96], [122.0, 12.75], [121.47, 12.97]]]]}}, "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": {"2023-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[122.0, 12.75], [121.47, 12.97], [121.25, 13.5], [121.47, 14.03], [122.0, 14.25], [122.53, 14.03], [122.75, 13.5], [122.53, 12.97], [122.0, 12.75]]], [[[121.5, 14.25], [120.97, 14.47], [120.75, 15.0], [120.97, 15.53], [121.5, 15.75], [122.03, 15.53], [122.25, 15.0], [122.03, 14.47], [121.5, 14.25]]]]}, "2023-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[122.0, 12.75], [121.47, 12.97], [121.25, 13.5], [121.47, 14.03], [122.0, 14.25], [122.53, 14.03], [122.75, 13.5], [122.53, 12.97], [122.0, 12.75]]], [[[121.5, 14.25], [120.97, 14.47], [120.75, 15.0], [120.97, 15.53], [121.5, 15.75], [122.03, 15.53], [122.25, 15.0], [122.03, 14.47], [121.5, 14.25]]]]}, "2023-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.5, 15.75], [122.03, 15.53], [122.25, 15.0], [122.15, 14.75], [122.2, 14.63], [122.5, 14.75], [123.03, 14.53], [123.18, 14.18], [123.53, 14.03], [123.68, 13.68], [124.03, 13.53], [124.25, 13.0], [124.03, 12.47], [123.5, 12.25], [122.97, 12.47], [122.82, 12.82], [122.5, 12.96], [122.0, 12.75], [121.47, 12.97], [121.32, 13.32], [120.97, 13.47], [120.75, 14.0], [120.85, 14.25], [120.75, 14.5], [120.85, 14.75], [120.75, 15.0], [120.97, 15.53], [121.5, 15.75]]], [[[120.0, 14.25], [119.47, 14.47], [119.25, 15.0], [119.47, 15.53], [120.0, 15.75], [120.53, 15.53], [120.75, 15.0], [120.53, 14.47], [120.0, 14.25]]]]}, "2023-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.75, 13.5], [118.97, 14.03], [119.32, 14.18], [119.35, 14.25], [119.25, 14.5], [119.35, 14.75], [119.25, 15.0], [119.47, 15.53], [120.0, 15.75], [120.5, 15.54], [121.0, 15.75], [121.53, 15.53], [121.68, 15.18], [122.03, 15.03], [122.2, 14.63], [122.5, 14.75], [123.03, 14.53], [123.18, 14.18], [123.53, 14.03], [123.68, 13.68], [124.03, 13.53], [124.25, 13.0], [124.03, 12.47], [123.5, 12.25], [122.97, 12.47], [122.82, 12.82], [122.5, 12.96], [122.0, 12.75], [121.47, 12.97], [121.32, 13.32], [121.25, 13.35], [121.18, 13.32], [121.03, 12.97], [120.68, 12.82], [120.53, 12.47], [120.0, 12.25], [119.75, 12.35], [119.5, 12.25], [118.97, 12.47], [118.75, 13.0], [118.85, 13.25], [118.75, 13.5]]]]}, "2023-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.75, 13.5], [118.97, 14.03], [119.32, 14.18], [119.35, 14.25], [119.25, 14.5], [119.35, 14.75], [119.25, 15.0], [119.47, 15.53], [120.0, 15.75], [120.5, 15.54], [121.0, 15.75], [121.53, 15.53], [121.68, 15.18], [122.03, 15.03], [122.2, 14.63], [122.5, 14.75], [123.03, 14.53], [123.18, 14.18], [123.53, 14.03], [123.68, 13.68], [124.03, 13.53], [124.25, 13.0], [124.03, 12.47], [123.5, 12.25], [122.97, 12.47], [122.82, 12.82], [122.5, 12.96], [122.0, 12.75], [121.47, 12.97], [121.32, 13.32], [121.25, 13.35], [121.18, 13.32], [121.03, 12.97], [120.68, 12.82], [120.53, 12.47], [120.0, 12.25], [119.75, 12.35], [119.5, 12.25], [118.97, 12.47], [118.75, 13.0], [118.85, 13.25], [118.75, 13.5]]]]}, "2023-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.75, 13.5], [118.97, 14.03], [119.32, 14.18], [119.35, 14.25], [119.25, 14.5], [119.47, 15.03], [120.0, 15.25], [120.25, 15.15], [120.32, 15.18], [120.47, 15.53], [121.0, 15.75], [121.53, 15.53], [121.75, 15.0], [121.65, 14.75], [121.75, 14.5], [121.65, 14.25], [121.75, 14.0], [121.53, 13.47], [121.18, 13.32], [121.03, 12.97], [120.68, 12.82], [120.53, 12.47], [120.0, 12.25], [119.75, 12.35], [119.5, 12.25], [118.97, 12.47], [118.75, 13.0], [118.85, 13.25], [118.75, 13.5]]]]}, "2023-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.47, 15.03], [121.0, 15.25], [121.53, 15.03], [121.75, 14.5], [121.53, 13.97], [121.0, 13.75], [120.47, 13.97], [120.25, 14.5], [120.47, 15.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.763168005777345}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4818879598130628}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.299301969722592, 25.560619394221078, 26.14802136871026, 26.318465538534667, 26.11292682590374, 26.913751839573536, 28.463204161542023]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.042338613225184, 24.433134987334086, 24.430111845572128, 24.568365279808802, 23.97700925710052, 26.40016798207114, 28.463204161542023]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0822386255185563, -0.8835197302587972, -1.1090976500739629, -1.5786271358232518, -1.8178802521403494, -1.2457597384472952, -1.0718863234005767]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2460504449422274, -0.9277732581198279, -1.4435806837288396, -2.592971029532748, -3.763168005777345, -2.3911791218476424, -1.0718863234005767]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4749296513670138, -1.2591514009957812, -1.541337682340848, -2.4580764794322594, -2.78485516100579, -2.0804265787467724, -1.296208052113592]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.650265988172589, -1.3136000475776979, -1.9047198024505823, -3.37184814303955, -4.57503532795069, -2.8745617352911976, -1.296208052113592]}}