{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:19:45.916465", "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": "2020-Dec-02_to_2020-Dec-05_107.0_35.5"}, "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": 2020120000157}, "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": "December 02 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 05 2020"}, "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": 62338.92371465953}, "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"]}, "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": 35.5}, "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": 107.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "107.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 106.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 110.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[106.323, 36.677], [106.47, 37.03], [106.823, 37.177], [106.97, 37.53], [107.5, 37.75], [107.75, 37.646], [108.0, 37.75], [108.5, 37.543], [108.823, 37.677], [108.97, 38.03], [109.5, 38.25], [109.75, 38.146], [110.0, 38.25], [110.53, 38.03], [110.75, 37.5], [110.53, 36.97], [110.177, 36.823], [110.146, 36.75], [110.25, 36.5], [110.03, 35.97], [109.677, 35.823], [109.646, 35.75], [109.75, 35.5], [109.53, 34.97], [109.0, 34.75], [108.5, 34.957], [108.177, 34.823], [108.03, 34.47], [107.5, 34.25], [107.25, 34.354], [107.0, 34.25], [106.47, 34.47], [106.323, 34.823], [105.97, 34.97], [105.75, 35.5], [105.854, 35.75], [105.75, 36.0], [105.97, 36.53], [106.323, 36.677]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[105.85355339059328, 35.75], [105.75, 36.0], [105.96966991411009, 36.53033008588991], [106.32322330470336, 36.67677669529664], [106.46966991411009, 37.03033008588991], [106.82322330470336, 37.17677669529664], [106.96966991411009, 37.53033008588991], [107.5, 37.75], [107.75, 37.64644660940672], [108.0, 37.75], [108.5, 37.542893218813454], [108.82322330470336, 37.67677669529664], [108.96966991411009, 38.03033008588991], [109.5, 38.25], [109.75, 38.14644660940672], [110.0, 38.25], [110.53033008588991, 38.03033008588991], [110.75, 37.5], [110.53033008588991, 36.96966991411009], [110.17677669529664, 36.82322330470336], [110.14644660940672, 36.75], [110.25, 36.5], [110.03033008588991, 35.96966991411009], [109.67677669529664, 35.82322330470336], [109.64644660940672, 35.75], [109.75, 35.5], [109.53033008588991, 34.96966991411009], [109.0, 34.75], [108.5, 34.957106781186546], [108.17677669529664, 34.82322330470336], [108.03033008588991, 34.46966991411009], [107.5, 34.25], [107.25, 34.35355339059328], [107.0, 34.25], [106.46966991411009, 34.46966991411009], [106.32322330470336, 34.82322330470336], [105.96966991411009, 34.96966991411009], [105.75, 35.5], [105.85355339059328, 35.75]]]}, "2020-12-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[105.85355339059328, 35.75], [105.75, 36.0], [105.96966991411009, 36.53033008588991], [106.32322330470336, 36.67677669529664], [106.46966991411009, 37.03033008588991], [106.82322330470336, 37.17677669529664], [106.96966991411009, 37.53033008588991], [107.5, 37.75], [107.75, 37.64644660940672], [108.0, 37.75], [108.5, 37.542893218813454], [108.82322330470336, 37.67677669529664], [108.96966991411009, 38.03033008588991], [109.5, 38.25], [109.75, 38.14644660940672], [110.0, 38.25], [110.53033008588991, 38.03033008588991], [110.75, 37.5], [110.53033008588991, 36.96966991411009], [110.17677669529664, 36.82322330470336], [110.14644660940672, 36.75], [110.25, 36.5], [110.03033008588991, 35.96966991411009], [109.67677669529664, 35.82322330470336], [109.64644660940672, 35.75], [109.75, 35.5], [109.53033008588991, 34.96966991411009], [109.0, 34.75], [108.5, 34.957106781186546], [108.17677669529664, 34.82322330470336], [108.03033008588991, 34.46966991411009], [107.5, 34.25], [107.25, 34.35355339059328], [107.0, 34.25], [106.46966991411009, 34.46966991411009], [106.32322330470336, 34.82322330470336], [105.96966991411009, 34.96966991411009], [105.75, 35.5], [105.85355339059328, 35.75]]]}, "2020-12-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[105.85355339059328, 35.75], [105.75, 36.0], [105.96966991411009, 36.53033008588991], [106.32322330470336, 36.67677669529664], [106.46966991411009, 37.03033008588991], [106.82322330470336, 37.17677669529664], [106.96966991411009, 37.53033008588991], [107.5, 37.75], [107.75, 37.64644660940672], [108.0, 37.75], [108.5, 37.542893218813454], [108.82322330470336, 37.67677669529664], [108.96966991411009, 38.03033008588991], [109.5, 38.25], [109.75, 38.14644660940672], [110.0, 38.25], [110.53033008588991, 38.03033008588991], [110.75, 37.5], [110.53033008588991, 36.96966991411009], [110.17677669529664, 36.82322330470336], [110.14644660940672, 36.75], [110.25, 36.5], [110.03033008588991, 35.96966991411009], [109.67677669529664, 35.82322330470336], [109.64644660940672, 35.75], [109.75, 35.5], [109.53033008588991, 34.96966991411009], [109.0, 34.75], [108.5, 34.957106781186546], [108.17677669529664, 34.82322330470336], [108.03033008588991, 34.46966991411009], [107.5, 34.25], [107.25, 34.35355339059328], [107.0, 34.25], [106.46966991411009, 34.46966991411009], [106.32322330470336, 34.82322330470336], [105.96966991411009, 34.96966991411009], [105.75, 35.5], [105.85355339059328, 35.75]]]}, "2020-12-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[106.35355339059328, 35.75], [106.25, 36.0], [106.46966991411009, 36.53033008588991], [107.0, 36.75], [107.25, 36.64644660940672], [107.5, 36.75], [108.03033008588991, 36.53033008588991], [108.25, 36.0], [108.03033008588991, 35.46966991411009], [107.67677669529664, 35.32322330470336], [107.53033008588991, 34.96966991411009], [107.0, 34.75], [106.46966991411009, 34.96966991411009], [106.25, 35.5], [106.35355339059328, 35.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.852502017732888}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.914729637603721}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.113199196526352, -7.735247214130197, -6.326135549939124, -4.967489493011385]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.566182479339204, -10.838677283645382, -9.235165589957319, -5.448117490095342]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.649730122480023, -5.955692427784483, -4.3137457813789135, -3.4565678140015734]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.697336600365134, -7.852502017732888, -5.981782674156477, -3.6253208747720578]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6925642051971386, -2.1056707199384705, -1.5116816536698479, -1.3150061844239653]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0954315308115192, -2.3150825904516945, -1.7007174343798543, -1.3328201169245917]}}