{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:19.750307", "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": "2019-Aug-31_to_2019-Sep-03_5.5_34.5"}, "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": 2019080000907}, "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": "August 31 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 03 2019"}, "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": 55995.38378221548}, "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", "Tunisia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": 34.5}, "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": 5.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "5.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 4.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.25, 34.0], [4.47, 34.53], [4.82, 34.68], [4.97, 35.03], [5.5, 35.25], [5.75, 35.15], [6.0, 35.25], [6.25, 35.15], [6.38, 35.2], [6.25, 35.5], [6.47, 36.03], [7.0, 36.25], [7.53, 36.03], [7.68, 35.68], [7.75, 35.65], [7.82, 35.68], [7.97, 36.03], [8.5, 36.25], [8.75, 36.15], [9.0, 36.25], [9.53, 36.03], [9.75, 35.5], [9.65, 35.25], [9.68, 35.18], [10.03, 35.03], [10.25, 34.5], [10.03, 33.97], [9.5, 33.75], [9.25, 33.85], [9.18, 33.82], [9.03, 33.47], [8.5, 33.25], [8.0, 33.46], [7.5, 33.25], [6.97, 33.47], [6.82, 33.82], [6.75, 33.85], [6.68, 33.82], [6.53, 33.47], [6.18, 33.32], [6.03, 32.97], [5.5, 32.75], [4.97, 32.97], [4.82, 33.32], [4.47, 33.47], [4.25, 34.0]]]]}, "2019-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.25, 34.0], [4.47, 34.53], [4.82, 34.68], [4.97, 35.03], [5.5, 35.25], [5.75, 35.15], [6.0, 35.25], [6.25, 35.15], [6.38, 35.2], [6.25, 35.5], [6.47, 36.03], [7.0, 36.25], [7.53, 36.03], [7.68, 35.68], [7.75, 35.65], [7.82, 35.68], [7.97, 36.03], [8.5, 36.25], [8.75, 36.15], [9.0, 36.25], [9.53, 36.03], [9.75, 35.5], [9.65, 35.25], [9.68, 35.18], [10.03, 35.03], [10.25, 34.5], [10.03, 33.97], [9.5, 33.75], [9.25, 33.85], [9.18, 33.82], [9.03, 33.47], [8.5, 33.25], [8.0, 33.46], [7.5, 33.25], [6.97, 33.47], [6.82, 33.82], [6.75, 33.85], [6.68, 33.82], [6.53, 33.47], [6.18, 33.32], [6.03, 32.97], [5.5, 32.75], [4.97, 32.97], [4.82, 33.32], [4.47, 33.47], [4.25, 34.0]]]]}, "2019-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.25, 34.0], [4.47, 34.53], [4.82, 34.68], [4.97, 35.03], [5.5, 35.25], [5.75, 35.15], [6.0, 35.25], [6.25, 35.15], [6.38, 35.2], [6.25, 35.5], [6.47, 36.03], [7.0, 36.25], [7.53, 36.03], [7.68, 35.68], [7.75, 35.65], [7.82, 35.68], [7.97, 36.03], [8.5, 36.25], [8.75, 36.15], [9.0, 36.25], [9.53, 36.03], [9.75, 35.5], [9.65, 35.25], [9.68, 35.18], [10.03, 35.03], [10.25, 34.5], [10.03, 33.97], [9.5, 33.75], [9.25, 33.85], [9.18, 33.82], [9.03, 33.47], [8.5, 33.25], [8.0, 33.46], [7.5, 33.25], [6.97, 33.47], [6.82, 33.82], [6.75, 33.85], [6.68, 33.82], [6.53, 33.47], [6.18, 33.32], [6.03, 32.97], [5.5, 32.75], [4.97, 32.97], [4.82, 33.32], [4.47, 33.47], [4.25, 34.0]]]]}, "2019-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.97, 33.97], [4.75, 34.5], [4.97, 35.03], [5.5, 35.25], [6.03, 35.03], [6.25, 34.5], [6.03, 33.97], [5.5, 33.75], [4.97, 33.97]]], [[[7.47, 33.97], [7.25, 34.5], [7.47, 35.03], [8.0, 35.25], [8.53, 35.03], [8.75, 34.5], [8.53, 33.97], [8.0, 33.75], [7.47, 33.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.592996891486621}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.77435917704618}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.191386336269886, 23.336560501528197, 24.87268269745516, 26.33076377530722]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.33263157921141, 18.358042357460363, 19.7013921349282, 24.65981968997812]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.033292502355938, -5.589633487529423, -3.8192360869112774, -3.464429174807094]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.130271192131545, -6.592996891486621, -4.8458136298590375, -3.5807971627186816]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.098440502623575, -2.1578854692782365, -1.4168051113379947, -1.2510882810691184]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.771767491171205, -2.5464923485824875, -1.7406065247364708, -1.3103694899866354]}}