{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:00.695358", "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": "2013-Apr-10_to_2013-Apr-13_104.0_24.5"}, "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": 2013040000393}, "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 10 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 13 2013"}, "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": 396613.88354214607}, "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": ["China", "Vietnam"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": []}, "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": 24.5}, "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": 104.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "104.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 101.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 109.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.47, 29.03], [102.0, 29.25], [102.25, 29.15], [102.5, 29.25], [102.75, 29.15], [103.0, 29.25], [103.53, 29.03], [103.68, 28.68], [104.03, 28.53], [104.18, 28.18], [104.25, 28.15], [104.5, 28.25], [104.75, 28.15], [105.0, 28.25], [105.5, 28.04], [106.0, 28.25], [106.53, 28.03], [106.68, 27.68], [106.75, 27.65], [107.0, 27.75], [107.53, 27.53], [107.75, 27.0], [107.65, 26.75], [107.75, 26.5], [107.65, 26.25], [107.68, 26.18], [108.03, 26.03], [108.18, 25.68], [108.53, 25.53], [108.75, 25.0], [108.65, 24.75], [108.75, 24.5], [108.65, 24.25], [108.75, 24.0], [108.65, 23.75], [108.68, 23.68], [109.03, 23.53], [109.18, 23.18], [109.25, 23.15], [109.5, 23.25], [110.03, 23.03], [110.25, 22.5], [110.03, 21.97], [109.68, 21.82], [109.53, 21.47], [109.0, 21.25], [108.75, 21.35], [108.5, 21.25], [108.25, 21.35], [108.18, 21.32], [108.03, 20.97], [107.5, 20.75], [107.25, 20.85], [107.18, 20.82], [107.03, 20.47], [106.68, 20.32], [106.65, 20.25], [106.75, 20.0], [106.53, 19.47], [106.18, 19.32], [106.03, 18.97], [105.5, 18.75], [104.97, 18.97], [104.75, 19.5], [104.85, 19.75], [104.82, 19.82], [104.47, 19.97], [104.32, 20.32], [103.97, 20.47], [103.75, 21.0], [103.85, 21.25], [103.75, 21.5], [103.96, 22.0], [103.75, 22.5], [103.96, 23.0], [103.82, 23.32], [103.75, 23.35], [103.5, 23.25], [102.97, 23.47], [102.75, 24.0], [102.85, 24.25], [102.82, 24.32], [102.47, 24.47], [102.25, 25.0], [102.35, 25.25], [102.25, 25.5], [102.46, 26.0], [102.32, 26.32], [101.97, 26.47], [101.75, 27.0], [101.85, 27.25], [101.82, 27.32], [101.47, 27.47], [101.25, 28.0], [101.35, 28.25], [101.25, 28.5], [101.47, 29.03]]]]}, "2013-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.35, 26.25], [101.25, 26.5], [101.47, 27.03], [101.82, 27.18], [101.85, 27.25], [101.82, 27.32], [101.47, 27.47], [101.25, 28.0], [101.35, 28.25], [101.25, 28.5], [101.47, 29.03], [102.0, 29.25], [102.25, 29.15], [102.5, 29.25], [102.75, 29.15], [103.0, 29.25], [103.53, 29.03], [103.68, 28.68], [104.03, 28.53], [104.18, 28.18], [104.25, 28.15], [104.5, 28.25], [104.75, 28.15], [105.0, 28.25], [105.5, 28.04], [106.0, 28.25], [106.53, 28.03], [106.68, 27.68], [106.75, 27.65], [107.0, 27.75], [107.53, 27.53], [107.75, 27.0], [107.65, 26.75], [107.75, 26.5], [107.65, 26.25], [107.68, 26.18], [108.03, 26.03], [108.18, 25.68], [108.53, 25.53], [108.75, 25.0], [108.65, 24.75], [108.75, 24.5], [108.65, 24.25], [108.75, 24.0], [108.65, 23.75], [108.68, 23.68], [109.03, 23.53], [109.18, 23.18], [109.25, 23.15], [109.5, 23.25], [110.03, 23.03], [110.25, 22.5], [110.03, 21.97], [109.68, 21.82], [109.53, 21.47], [109.0, 21.25], [108.75, 21.35], [108.5, 21.25], [108.25, 21.35], [108.18, 21.32], [108.03, 20.97], [107.5, 20.75], [107.25, 20.85], [107.18, 20.82], [107.03, 20.47], [106.68, 20.32], [106.65, 20.25], [106.75, 20.0], [106.53, 19.47], [106.18, 19.32], [106.03, 18.97], [105.5, 18.75], [104.97, 18.97], [104.75, 19.5], [104.85, 19.75], [104.82, 19.82], [104.47, 19.97], [104.32, 20.32], [103.97, 20.47], [103.75, 21.0], [103.85, 21.25], [103.75, 21.5], [103.85, 21.75], [103.75, 22.0], [103.85, 22.25], [103.75, 22.5], [103.96, 23.0], [103.82, 23.32], [103.75, 23.35], [103.5, 23.25], [102.97, 23.47], [102.75, 24.0], [102.85, 24.25], [102.82, 24.32], [102.47, 24.47], [102.32, 24.82], [102.25, 24.85], [102.0, 24.75], [101.47, 24.97], [101.25, 25.5], [101.35, 25.75], [101.25, 26.0], [101.35, 26.25]]]]}, "2013-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.35, 26.25], [101.25, 26.5], [101.47, 27.03], [101.82, 27.18], [101.85, 27.25], [101.82, 27.32], [101.47, 27.47], [101.25, 28.0], [101.35, 28.25], [101.25, 28.5], [101.47, 29.03], [102.0, 29.25], [102.25, 29.15], [102.5, 29.25], [102.75, 29.15], [103.0, 29.25], [103.53, 29.03], [103.68, 28.68], [104.03, 28.53], [104.18, 28.18], [104.25, 28.15], [104.5, 28.25], [104.75, 28.15], [105.0, 28.25], [105.5, 28.04], [106.0, 28.25], [106.53, 28.03], [106.68, 27.68], [106.75, 27.65], [107.0, 27.75], [107.53, 27.53], [107.75, 27.0], [107.65, 26.75], [107.75, 26.5], [107.65, 26.25], [107.68, 26.18], [108.03, 26.03], [108.18, 25.68], [108.53, 25.53], [108.75, 25.0], [108.65, 24.75], [108.75, 24.5], [108.65, 24.25], [108.75, 24.0], [108.65, 23.75], [108.68, 23.68], [109.03, 23.53], [109.18, 23.18], [109.25, 23.15], [109.5, 23.25], [110.03, 23.03], [110.25, 22.5], [110.03, 21.97], [109.68, 21.82], [109.53, 21.47], [109.0, 21.25], [108.75, 21.35], [108.5, 21.25], [108.25, 21.35], [108.18, 21.32], [108.03, 20.97], [107.5, 20.75], [107.25, 20.85], [107.18, 20.82], [107.03, 20.47], [106.68, 20.32], [106.65, 20.25], [106.75, 20.0], [106.53, 19.47], [106.18, 19.32], [106.03, 18.97], [105.5, 18.75], [104.97, 18.97], [104.75, 19.5], [104.85, 19.75], [104.82, 19.82], [104.47, 19.97], [104.32, 20.32], [103.97, 20.47], [103.75, 21.0], [103.85, 21.25], [103.75, 21.5], [103.85, 21.75], [103.75, 22.0], [103.85, 22.25], [103.75, 22.5], [103.96, 23.0], [103.82, 23.32], [103.75, 23.35], [103.5, 23.25], [102.97, 23.47], [102.75, 24.0], [102.85, 24.25], [102.82, 24.32], [102.47, 24.47], [102.32, 24.82], [102.25, 24.85], [102.0, 24.75], [101.47, 24.97], [101.25, 25.5], [101.35, 25.75], [101.25, 26.0], [101.35, 26.25]]]]}, "2013-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.5, 23.25], [104.75, 23.15], [105.0, 23.25], [105.53, 23.03], [105.75, 22.5], [105.65, 22.25], [105.68, 22.18], [106.03, 22.03], [106.25, 21.5], [106.03, 20.97], [105.5, 20.75], [104.97, 20.97], [104.82, 21.32], [104.75, 21.35], [104.5, 21.25], [103.97, 21.47], [103.75, 22.0], [103.85, 22.25], [103.75, 22.5], [103.97, 23.03], [104.5, 23.25]]], [[[101.25, 26.5], [101.47, 27.03], [102.0, 27.25], [102.53, 27.03], [102.75, 26.5], [102.65, 26.25], [102.68, 26.18], [103.03, 26.03], [103.25, 25.5], [103.03, 24.97], [102.5, 24.75], [102.25, 24.85], [102.0, 24.75], [101.47, 24.97], [101.25, 25.5], [101.35, 25.75], [101.25, 26.0], [101.35, 26.25], [101.25, 26.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.576717348797956}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.483543107146902}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.495778573833888, 11.79472074430447, 12.333613376730625, 17.545587710114717]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.08965174695492806, -0.5445439742532585, -1.3675801132667402, 14.159985212183699]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.170885874595014, -6.929952419700254, -6.478213956394436, -4.297885419717084]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.62807018972245, -9.576717348797956, -9.303869554334028, -4.82210487204452]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6692750350225776, -1.9092134857135623, -1.8100354511699444, -1.4974251411902069]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.070917809764448, -2.6069473256679854, -2.642062818311434, -1.8086024958622686]}}