{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:46.655012", "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": "2012-Mar-04_to_2012-Mar-07_46.5_-21.0"}, "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": 2012030000392}, "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": "March 04 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 07 2012"}, "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": 55181.299014847464}, "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": ["Madagascar"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": -21.0}, "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": 46.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 45.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 47.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.35, -20.25], [45.25, -20.0], [45.35, -19.75], [45.25, -19.5], [45.35, -19.25], [45.25, -19.0], [45.47, -18.47], [45.82, -18.32], [45.97, -17.97], [46.5, -17.75], [46.75, -17.85], [47.0, -17.75], [47.53, -17.97], [47.75, -18.5], [47.65, -18.75], [47.75, -19.0], [47.65, -19.25], [47.75, -19.5], [47.65, -19.75], [47.75, -20.0], [47.65, -20.25], [47.75, -20.5], [47.65, -20.75], [47.75, -21.0], [47.65, -21.25], [47.75, -21.5], [47.53, -22.03], [47.0, -22.25], [46.75, -22.15], [46.5, -22.25], [45.97, -22.03], [45.82, -21.68], [45.47, -21.53], [45.25, -21.0], [45.35, -20.75], [45.25, -20.5], [45.35, -20.25]]]]}, "2012-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.35, -20.25], [45.25, -20.0], [45.35, -19.75], [45.25, -19.5], [45.35, -19.25], [45.25, -19.0], [45.47, -18.47], [45.82, -18.32], [45.97, -17.97], [46.5, -17.75], [46.75, -17.85], [47.0, -17.75], [47.53, -17.97], [47.75, -18.5], [47.65, -18.75], [47.75, -19.0], [47.65, -19.25], [47.75, -19.5], [47.65, -19.75], [47.75, -20.0], [47.65, -20.25], [47.75, -20.5], [47.65, -20.75], [47.75, -21.0], [47.65, -21.25], [47.75, -21.5], [47.53, -22.03], [47.0, -22.25], [46.75, -22.15], [46.5, -22.25], [45.97, -22.03], [45.82, -21.68], [45.47, -21.53], [45.25, -21.0], [45.35, -20.75], [45.25, -20.5], [45.35, -20.25]]]]}, "2012-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.35, -20.25], [45.25, -20.0], [45.35, -19.75], [45.25, -19.5], [45.35, -19.25], [45.25, -19.0], [45.47, -18.47], [45.82, -18.32], [45.97, -17.97], [46.5, -17.75], [46.75, -17.85], [47.0, -17.75], [47.53, -17.97], [47.75, -18.5], [47.65, -18.75], [47.75, -19.0], [47.65, -19.25], [47.75, -19.5], [47.65, -19.75], [47.75, -20.0], [47.65, -20.25], [47.75, -20.5], [47.65, -20.75], [47.75, -21.0], [47.65, -21.25], [47.75, -21.5], [47.53, -22.03], [47.0, -22.25], [46.75, -22.15], [46.5, -22.25], [45.97, -22.03], [45.82, -21.68], [45.47, -21.53], [45.25, -21.0], [45.35, -20.75], [45.25, -20.5], [45.35, -20.25]]]]}, "2012-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.97, -21.53], [45.75, -21.0], [45.97, -20.47], [46.5, -20.25], [47.03, -20.47], [47.25, -21.0], [47.03, -21.53], [46.5, -21.75], [45.97, -21.53]]], [[[45.97, -19.53], [45.75, -19.0], [45.97, -18.47], [46.5, -18.25], [47.03, -18.47], [47.25, -19.0], [47.03, -19.53], [46.5, -19.75], [45.97, -19.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2608598728776883}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.8491361383434817}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.84733023697885, 19.999126458182616, 20.057061189730405, 21.73006106274738]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.191980963757544, 15.987980195870648, 16.374589619282858, 21.728199204334373]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.035288167392728, -1.8323307852963382, -1.7504357902927807, -1.1779960228051607]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2276471619633753, -3.2608598728776883, -2.7321421398520442, -1.250244481361392]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.351904254368386, -2.0376910275010776, -1.9335855295561926, -1.375579976012772]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.4743798055858433, -3.11620586028949, -2.818812310430948, -1.386638268338334]}}