{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:09.446558", "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-Feb-28_to_2023-Mar-04_0.5_36.0"}, "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": 2023020001066}, "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 28 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 04 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 65954.51282187515}, "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": ["Algeria"]}, "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": 36.0}, "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": 0.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "0.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -1.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[2.97, 36.03], [3.5, 36.25], [4.03, 36.03], [4.25, 35.5], [4.15, 35.25], [4.18, 35.18], [4.53, 35.03], [4.75, 34.5], [4.53, 33.97], [4.0, 33.75], [3.5, 33.96], [3.18, 33.82], [3.03, 33.47], [2.5, 33.25], [2.0, 33.46], [1.5, 33.25], [1.25, 33.35], [1.0, 33.25], [0.47, 33.47], [0.32, 33.82], [0.25, 33.85], [0.0, 33.75], [-0.25, 33.85], [-0.5, 33.75], [-1.03, 33.97], [-1.18, 34.32], [-1.53, 34.47], [-1.75, 35.0], [-1.53, 35.53], [-1.0, 35.75], [-0.75, 35.65], [-0.68, 35.68], [-0.53, 36.03], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [1.03, 36.53], [1.18, 36.18], [1.5, 36.04], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [2.82, 35.68], [2.97, 36.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.75, 35.5], [-0.53, 36.03], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [1.03, 36.53], [1.18, 36.18], [1.5, 36.04], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [2.82, 35.68], [2.97, 36.03], [3.5, 36.25], [4.03, 36.03], [4.25, 35.5], [4.15, 35.25], [4.25, 35.0], [4.03, 34.47], [3.5, 34.25], [3.25, 34.35], [3.0, 34.25], [2.75, 34.35], [2.68, 34.32], [2.53, 33.97], [2.0, 33.75], [1.75, 33.85], [1.5, 33.75], [0.97, 33.97], [0.82, 34.32], [0.75, 34.35], [0.68, 34.32], [0.53, 33.97], [0.0, 33.75], [-0.53, 33.97], [-0.75, 34.5], [-0.54, 35.0], [-0.75, 35.5]]]]}, "2023-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.53, 34.47], [-1.75, 35.0], [-1.53, 35.53], [-1.0, 35.75], [-0.75, 35.65], [-0.68, 35.68], [-0.53, 36.03], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [1.03, 36.53], [1.18, 36.18], [1.5, 36.04], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [2.82, 35.68], [2.97, 36.03], [3.5, 36.25], [4.03, 36.03], [4.25, 35.5], [4.15, 35.25], [4.25, 35.0], [4.03, 34.47], [3.5, 34.25], [3.25, 34.35], [3.0, 34.25], [2.75, 34.35], [2.68, 34.32], [2.53, 33.97], [2.18, 33.82], [2.03, 33.47], [1.5, 33.25], [1.25, 33.35], [1.0, 33.25], [0.47, 33.47], [0.32, 33.82], [0.25, 33.85], [0.0, 33.75], [-0.25, 33.85], [-0.5, 33.75], [-1.03, 33.97], [-1.18, 34.32], [-1.53, 34.47]]]]}, "2023-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.53, 34.47], [-1.75, 35.0], [-1.53, 35.53], [-1.0, 35.75], [-0.75, 35.65], [-0.68, 35.68], [-0.53, 36.03], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [1.03, 36.53], [1.18, 36.18], [1.5, 36.04], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [2.82, 35.68], [2.97, 36.03], [3.5, 36.25], [4.03, 36.03], [4.25, 35.5], [4.15, 35.25], [4.18, 35.18], [4.53, 35.03], [4.75, 34.5], [4.53, 33.97], [4.0, 33.75], [3.5, 33.96], [3.18, 33.82], [3.03, 33.47], [2.5, 33.25], [2.0, 33.46], [1.5, 33.25], [1.25, 33.35], [1.0, 33.25], [0.47, 33.47], [0.32, 33.82], [0.25, 33.85], [0.0, 33.75], [-0.25, 33.85], [-0.5, 33.75], [-1.03, 33.97], [-1.18, 34.32], [-1.53, 34.47]]]]}, "2023-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.53, 34.47], [-1.75, 35.0], [-1.53, 35.53], [-1.0, 35.75], [-0.75, 35.65], [-0.68, 35.68], [-0.53, 36.03], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [1.03, 36.53], [1.18, 36.18], [1.5, 36.04], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [3.0, 35.75], [3.25, 35.65], [3.5, 35.75], [4.03, 35.53], [4.18, 35.18], [4.53, 35.03], [4.75, 34.5], [4.53, 33.97], [4.0, 33.75], [3.5, 33.96], [3.18, 33.82], [3.03, 33.47], [2.5, 33.25], [2.0, 33.46], [1.5, 33.25], [1.25, 33.35], [1.0, 33.25], [0.47, 33.47], [0.32, 33.82], [0.25, 33.85], [0.0, 33.75], [-0.25, 33.85], [-0.5, 33.75], [-1.03, 33.97], [-1.18, 34.32], [-1.53, 34.47]]]]}, "2023-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.97, 35.03], [2.32, 35.18], [2.47, 35.53], [3.0, 35.75], [3.53, 35.53], [3.7, 35.13], [4.0, 35.25], [4.53, 35.03], [4.75, 34.5], [4.53, 33.97], [4.0, 33.75], [3.5, 33.96], [3.18, 33.82], [3.03, 33.47], [2.5, 33.25], [1.97, 33.47], [1.75, 34.0], [1.85, 34.25], [1.75, 34.5], [1.97, 35.03]]], [[[0.5, 35.25], [-0.03, 35.47], [-0.25, 36.0], [-0.03, 36.53], [0.5, 36.75], [1.03, 36.53], [1.25, 36.0], [1.03, 35.47], [0.5, 35.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.268942731281527}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.967741751509714}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.797748873899479, 5.094368344164366, 4.9747405103877895, 4.565231590425981, 5.789146966104624]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.7431151542348857, 3.2197177521751996, 3.1705980630926547, 2.180986980479986, 3.8932390809348476]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.970054390886751, -4.625955375443183, -4.854385920363882, -5.483246402104604, -4.589016084385075]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.040176255952247, -5.065944819401238, -5.442665555985343, -6.268942731281527, -5.008568514935405]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5673153895466145, -1.4444247123319682, -1.496295983694419, -1.6611237546065605, -1.3622691562991063]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8422680129937796, -1.5964158486995552, -1.7253377363884457, -1.8986366713427252, -1.4337324947185985]}}