{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:01.009466", "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-30_to_2012-Apr-04_100.0_30.5"}, "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": 2012030001686}, "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 30 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 164941.09468849967}, "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", "India"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.Asia", "Tibetan-Plateau"]}, "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": 30.5}, "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": 100.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "100.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 93.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 102.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[97.47, 31.53], [98.0, 31.75], [98.25, 31.65], [98.5, 31.75], [99.0, 31.54], [99.32, 31.68], [99.47, 32.03], [100.0, 32.25], [100.25, 32.15], [100.5, 32.25], [100.75, 32.15], [101.0, 32.25], [101.25, 32.15], [101.32, 32.18], [101.47, 32.53], [101.82, 32.68], [101.97, 33.03], [102.5, 33.25], [103.03, 33.03], [103.25, 32.5], [103.15, 32.25], [103.25, 32.0], [103.15, 31.75], [103.25, 31.5], [103.15, 31.25], [103.25, 31.0], [103.03, 30.47], [102.68, 30.32], [102.65, 30.25], [102.75, 30.0], [102.54, 29.5], [102.75, 29.0], [102.53, 28.47], [102.0, 28.25], [101.75, 28.35], [101.5, 28.25], [100.97, 28.47], [100.82, 28.82], [100.47, 28.97], [100.32, 29.32], [100.25, 29.35], [100.0, 29.25], [99.75, 29.35], [99.5, 29.25], [99.0, 29.46], [98.5, 29.25], [97.97, 29.47], [97.75, 30.0], [97.85, 30.25], [97.82, 30.32], [97.47, 30.47], [97.25, 31.0], [97.47, 31.53]]], [[[92.75, 32.0], [92.97, 32.53], [93.5, 32.75], [93.75, 32.65], [94.0, 32.75], [94.53, 32.53], [94.75, 32.0], [94.53, 31.47], [94.0, 31.25], [93.75, 31.35], [93.5, 31.25], [92.97, 31.47], [92.75, 32.0]]]]}, "2012-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.97, 31.47], [92.75, 32.0], [92.97, 32.53], [93.5, 32.75], [93.75, 32.65], [94.0, 32.75], [94.53, 32.53], [94.68, 32.18], [94.75, 32.15], [95.0, 32.25], [95.25, 32.15], [95.5, 32.25], [95.75, 32.15], [96.0, 32.25], [96.53, 32.03], [96.75, 31.5], [96.65, 31.25], [96.75, 31.0], [96.65, 30.75], [96.75, 30.5], [96.65, 30.25], [96.75, 30.0], [96.65, 29.75], [96.68, 29.68], [96.75, 29.65], [96.82, 29.68], [96.97, 30.03], [97.32, 30.18], [97.46, 30.5], [97.25, 31.0], [97.47, 31.53], [98.0, 31.75], [98.25, 31.65], [98.32, 31.68], [98.47, 32.03], [98.82, 32.18], [98.97, 32.53], [99.5, 32.75], [99.75, 32.65], [100.0, 32.75], [100.53, 32.53], [100.68, 32.18], [100.75, 32.15], [101.0, 32.25], [101.25, 32.15], [101.32, 32.18], [101.47, 32.53], [101.82, 32.68], [101.97, 33.03], [102.5, 33.25], [103.03, 33.03], [103.25, 32.5], [103.15, 32.25], [103.25, 32.0], [103.15, 31.75], [103.25, 31.5], [103.15, 31.25], [103.25, 31.0], [103.03, 30.47], [102.68, 30.32], [102.65, 30.25], [102.75, 30.0], [102.54, 29.5], [102.75, 29.0], [102.53, 28.47], [102.0, 28.25], [101.75, 28.35], [101.5, 28.25], [100.97, 28.47], [100.82, 28.82], [100.47, 28.97], [100.32, 29.32], [100.25, 29.35], [100.0, 29.25], [99.75, 29.35], [99.5, 29.25], [99.25, 29.35], [99.13, 29.3], [99.25, 29.0], [99.03, 28.47], [98.5, 28.25], [98.25, 28.35], [98.0, 28.25], [97.75, 28.35], [97.5, 28.25], [97.25, 28.35], [97.0, 28.25], [96.75, 28.35], [96.5, 28.25], [96.25, 28.35], [96.0, 28.25], [95.47, 28.47], [95.25, 29.0], [95.35, 29.25], [95.25, 29.5], [95.35, 29.75], [95.25, 30.0], [95.35, 30.25], [95.32, 30.32], [94.97, 30.47], [94.82, 30.82], [94.75, 30.85], [94.5, 30.75], [93.97, 30.97], [93.82, 31.32], [93.75, 31.35], [93.5, 31.25], [92.97, 31.47]]]]}, "2012-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.97, 31.47], [92.75, 32.0], [92.97, 32.53], [93.5, 32.75], [93.75, 32.65], [94.0, 32.75], [94.53, 32.53], [94.68, 32.18], [94.75, 32.15], [95.0, 32.25], [95.25, 32.15], [95.5, 32.25], [95.75, 32.15], [96.0, 32.25], [96.53, 32.03], [96.75, 31.5], [96.65, 31.25], [96.75, 31.0], [96.65, 30.75], [96.75, 30.5], [96.65, 30.25], [96.75, 30.0], [96.65, 29.75], [96.68, 29.68], [96.75, 29.65], [96.82, 29.68], [96.97, 30.03], [97.32, 30.18], [97.46, 30.5], [97.25, 31.0], [97.47, 31.53], [98.0, 31.75], [98.25, 31.65], [98.32, 31.68], [98.47, 32.03], [98.82, 32.18], [98.97, 32.53], [99.5, 32.75], [99.75, 32.65], [100.0, 32.75], [100.53, 32.53], [100.68, 32.18], [100.75, 32.15], [101.0, 32.25], [101.25, 32.15], [101.32, 32.18], [101.47, 32.53], [101.82, 32.68], [101.97, 33.03], [102.5, 33.25], [103.03, 33.03], [103.25, 32.5], [103.15, 32.25], [103.25, 32.0], [103.15, 31.75], [103.25, 31.5], [103.15, 31.25], [103.25, 31.0], [103.03, 30.47], [102.68, 30.32], [102.65, 30.25], [102.75, 30.0], [102.54, 29.5], [102.75, 29.0], [102.53, 28.47], [102.0, 28.25], [101.75, 28.35], [101.5, 28.25], [100.97, 28.47], [100.82, 28.82], [100.47, 28.97], [100.32, 29.32], [100.25, 29.35], [100.0, 29.25], [99.75, 29.35], [99.5, 29.25], [99.25, 29.35], [99.13, 29.3], [99.25, 29.0], [99.03, 28.47], [98.5, 28.25], [98.25, 28.35], [98.0, 28.25], [97.75, 28.35], [97.5, 28.25], [97.25, 28.35], [97.0, 28.25], [96.75, 28.35], [96.5, 28.25], [96.25, 28.35], [96.0, 28.25], [95.47, 28.47], [95.25, 29.0], [95.35, 29.25], [95.25, 29.5], [95.35, 29.75], [95.25, 30.0], [95.35, 30.25], [95.32, 30.32], [94.97, 30.47], [94.82, 30.82], [94.75, 30.85], [94.5, 30.75], [93.97, 30.97], [93.82, 31.32], [93.75, 31.35], [93.5, 31.25], [92.97, 31.47]]]]}, "2012-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.97, 30.97], [93.75, 31.5], [93.97, 32.03], [94.5, 32.25], [94.75, 32.15], [95.0, 32.25], [95.25, 32.15], [95.5, 32.25], [95.75, 32.15], [96.0, 32.25], [96.53, 32.03], [96.75, 31.5], [96.65, 31.25], [96.75, 31.0], [96.65, 30.75], [96.75, 30.5], [96.65, 30.25], [96.75, 30.0], [96.65, 29.75], [96.68, 29.68], [96.75, 29.65], [96.82, 29.68], [96.97, 30.03], [97.32, 30.18], [97.47, 30.53], [97.88, 30.7], [97.75, 31.0], [97.97, 31.53], [98.32, 31.68], [98.47, 32.03], [98.82, 32.18], [98.97, 32.53], [99.5, 32.75], [99.75, 32.65], [100.0, 32.75], [100.53, 32.53], [100.68, 32.18], [100.75, 32.15], [101.0, 32.25], [101.53, 32.03], [101.7, 31.63], [102.0, 31.75], [102.53, 31.53], [102.75, 31.0], [102.53, 30.47], [102.18, 30.32], [102.15, 30.25], [102.25, 30.0], [102.03, 29.47], [101.5, 29.25], [101.25, 29.35], [101.0, 29.25], [100.75, 29.35], [100.5, 29.25], [100.0, 29.46], [99.5, 29.25], [99.25, 29.35], [99.13, 29.3], [99.25, 29.0], [99.03, 28.47], [98.5, 28.25], [98.25, 28.35], [98.0, 28.25], [97.75, 28.35], [97.5, 28.25], [97.25, 28.35], [97.0, 28.25], [96.75, 28.35], [96.5, 28.25], [96.25, 28.35], [96.0, 28.25], [95.47, 28.47], [95.25, 29.0], [95.35, 29.25], [95.25, 29.5], [95.35, 29.75], [95.25, 30.0], [95.35, 30.25], [95.32, 30.32], [94.97, 30.47], [94.82, 30.82], [94.75, 30.85], [94.5, 30.75], [93.97, 30.97]]]]}, "2012-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.0, 30.75], [96.53, 30.53], [96.75, 30.0], [96.65, 29.75], [96.68, 29.68], [96.75, 29.65], [96.82, 29.68], [96.97, 30.03], [97.32, 30.18], [97.47, 30.53], [98.0, 30.75], [98.53, 30.53], [98.75, 30.0], [98.63, 29.7], [99.03, 29.53], [99.25, 29.0], [99.03, 28.47], [98.5, 28.25], [98.25, 28.35], [98.0, 28.25], [97.75, 28.35], [97.5, 28.25], [97.25, 28.35], [97.0, 28.25], [96.75, 28.35], [96.5, 28.25], [95.97, 28.47], [95.82, 28.82], [95.47, 28.97], [95.25, 29.5], [95.35, 29.75], [95.25, 30.0], [95.47, 30.53], [96.0, 30.75]]], [[[99.47, 29.97], [99.25, 30.5], [99.47, 31.03], [100.0, 31.25], [100.53, 31.03], [100.75, 30.5], [100.53, 29.97], [100.0, 29.75], [99.47, 29.97]]]]}, "2012-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.47, 30.53], [96.0, 30.75], [96.53, 30.53], [96.75, 30.0], [96.65, 29.75], [96.68, 29.68], [96.75, 29.65], [97.0, 29.75], [97.25, 29.65], [97.5, 29.75], [98.03, 29.53], [98.25, 29.0], [98.03, 28.47], [97.5, 28.25], [97.25, 28.35], [97.0, 28.25], [96.75, 28.35], [96.5, 28.25], [95.97, 28.47], [95.82, 28.82], [95.47, 28.97], [95.25, 29.5], [95.35, 29.75], [95.25, 30.0], [95.47, 30.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.0943954990654}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.504856321307053}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-7.2652575658152045, -11.474877724219766, -10.385699194429094, -8.89507094075583, -8.651840210048249, -8.65305092940389]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-13.297665374084318, -17.348923252733158, -19.396111853818724, -16.919963761654287, -10.282270564313706, -10.58684215221706]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.952883417385192, -8.198640172865844, -7.203098581886623, -5.175873828499258, -4.221566717743923, -3.3055727530629495]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.162634250842814, -14.0943954990654, -12.347971226571246, -8.322979871833525, -6.013431940260091, -4.066499279502921]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6076940004888916, -2.820155653736453, -2.466045885056688, -1.756224960556256, -1.7158271785284682, -1.6798917243997284]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2726799260463864, -3.834872558632262, -3.830032849529896, -2.6327746918752037, -2.253955421836993, -1.9500090921776676]}}