{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:11.543932", "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": "2011-Apr-20_to_2011-Apr-23_275.0_8.5"}, "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": 2011040001049}, "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 20 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2011"}, "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": 76460.08053744597}, "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": ["Costa Rica"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Central-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": ["North Pacific 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": 8.5}, "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": 275.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "275.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 274.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 277.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 10.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.03, 9.03], [-85.68, 9.18], [-85.65, 9.25], [-85.75, 9.5], [-85.53, 10.03], [-85.0, 10.25], [-84.75, 10.15], [-84.5, 10.25], [-84.25, 10.15], [-84.0, 10.25], [-83.47, 10.03], [-83.32, 9.68], [-82.97, 9.53], [-82.75, 9.0], [-82.85, 8.75], [-82.82, 8.68], [-82.47, 8.53], [-82.25, 8.0], [-82.47, 7.47], [-82.82, 7.32], [-82.85, 7.25], [-82.75, 7.0], [-82.97, 6.47], [-83.5, 6.25], [-84.03, 6.47], [-84.18, 6.82], [-84.25, 6.85], [-84.5, 6.75], [-84.75, 6.85], [-85.0, 6.75], [-85.53, 6.97], [-85.68, 7.32], [-86.03, 7.47], [-86.25, 8.0], [-86.15, 8.25], [-86.25, 8.5], [-86.03, 9.03]]]]}, "2011-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.15, 7.75], [-86.25, 8.0], [-86.15, 8.25], [-86.25, 8.5], [-86.03, 9.03], [-85.68, 9.18], [-85.65, 9.25], [-85.75, 9.5], [-85.65, 9.75], [-85.75, 10.0], [-85.53, 10.53], [-85.0, 10.75], [-84.47, 10.53], [-84.32, 10.18], [-84.25, 10.15], [-84.0, 10.25], [-83.47, 10.03], [-83.32, 9.68], [-82.97, 9.53], [-82.75, 9.0], [-82.85, 8.75], [-82.82, 8.68], [-82.47, 8.53], [-82.25, 8.0], [-82.47, 7.47], [-82.82, 7.32], [-82.85, 7.25], [-82.75, 7.0], [-82.97, 6.47], [-83.5, 6.25], [-84.03, 6.47], [-84.18, 6.82], [-84.25, 6.85], [-84.5, 6.75], [-84.75, 6.85], [-84.82, 6.82], [-84.97, 6.47], [-85.5, 6.25], [-86.03, 6.47], [-86.25, 7.0], [-86.15, 7.25], [-86.25, 7.5], [-86.15, 7.75]]]]}, "2011-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.15, 7.75], [-86.25, 8.0], [-86.15, 8.25], [-86.25, 8.5], [-86.03, 9.03], [-85.68, 9.18], [-85.65, 9.25], [-85.75, 9.5], [-85.65, 9.75], [-85.75, 10.0], [-85.53, 10.53], [-85.0, 10.75], [-84.47, 10.53], [-84.32, 10.18], [-84.25, 10.15], [-84.0, 10.25], [-83.47, 10.03], [-83.32, 9.68], [-82.97, 9.53], [-82.75, 9.0], [-82.85, 8.75], [-82.82, 8.68], [-82.47, 8.53], [-82.25, 8.0], [-82.47, 7.47], [-82.82, 7.32], [-82.85, 7.25], [-82.75, 7.0], [-82.97, 6.47], [-83.5, 6.25], [-84.03, 6.47], [-84.18, 6.82], [-84.25, 6.85], [-84.5, 6.75], [-84.75, 6.85], [-84.82, 6.82], [-84.97, 6.47], [-85.5, 6.25], [-86.03, 6.47], [-86.25, 7.0], [-86.15, 7.25], [-86.25, 7.5], [-86.15, 7.75]]]]}, "2011-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.25, 8.0], [-86.15, 8.25], [-86.25, 8.5], [-86.03, 9.03], [-85.68, 9.18], [-85.65, 9.25], [-85.75, 9.5], [-85.65, 9.75], [-85.75, 10.0], [-85.53, 10.53], [-85.0, 10.75], [-84.47, 10.53], [-84.25, 10.0], [-84.35, 9.75], [-84.25, 9.5], [-84.35, 9.25], [-84.25, 9.0], [-84.35, 8.75], [-84.25, 8.5], [-84.47, 7.97], [-84.82, 7.82], [-84.85, 7.75], [-84.75, 7.5], [-84.85, 7.25], [-84.75, 7.0], [-84.97, 6.47], [-85.5, 6.25], [-86.03, 6.47], [-86.25, 7.0], [-86.15, 7.25], [-86.25, 7.5], [-86.15, 7.75], [-86.25, 8.0]]], [[[-82.97, 9.03], [-82.75, 8.5], [-82.97, 7.97], [-83.5, 7.75], [-84.03, 7.97], [-84.25, 8.5], [-84.03, 9.03], [-83.5, 9.25], [-82.97, 9.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4637707054984617}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0393736281256107}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.851986006545303, 25.620758295994506, 25.89994332523213, 26.125171040698433]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.64416100422551, 21.613008405681057, 21.37905998880774, 25.344557837661284]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.974768724451208, -1.224825167078593, -0.9279021800380792, -0.9917964735923432]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2727065938497617, -1.4637707054984617, -1.2356602674142323, -1.2600078423375862]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6448740474996086, -2.063237815526972, -1.5299674294871164, -1.62025337496508]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0642131195678477, -2.455137637510309, -1.9914875189923185, -2.0424609955066892]}}