{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:22.324567", "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": "2015-Dec-14_to_2015-Dec-18_250.0_33.5"}, "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": 2015120000361}, "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 14 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 18 2015"}, "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": 554856.0916241608}, "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": ["Mexico", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America", "W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": ["Gulf of California"]}, "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": 33.5}, "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": 250.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "250.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 238.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 254.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.03, 41.03], [-121.5, 41.25], [-120.97, 41.03], [-120.75, 40.5], [-120.85, 40.25], [-120.82, 40.18], [-120.47, 40.03], [-120.32, 39.68], [-120.25, 39.65], [-120.0, 39.75], [-119.47, 39.53], [-119.25, 39.0], [-119.35, 38.75], [-119.32, 38.68], [-119.25, 38.65], [-119.0, 38.75], [-118.47, 38.53], [-118.25, 38.0], [-118.37, 37.7], [-117.97, 37.53], [-117.75, 37.0], [-117.85, 36.75], [-117.75, 36.5], [-117.96, 36.0], [-117.75, 35.5], [-117.85, 35.25], [-117.82, 35.18], [-117.47, 35.03], [-117.25, 34.5], [-117.47, 33.97], [-118.0, 33.75], [-118.53, 33.97], [-118.68, 34.32], [-118.75, 34.35], [-119.0, 34.25], [-119.25, 34.35], [-119.5, 34.25], [-119.75, 34.35], [-120.0, 34.25], [-120.53, 34.47], [-120.75, 35.0], [-120.53, 35.53], [-120.0, 35.75], [-119.75, 35.65], [-119.5, 35.75], [-119.25, 35.65], [-119.18, 35.68], [-119.12, 35.8], [-119.53, 35.97], [-119.68, 36.32], [-120.03, 36.47], [-120.18, 36.82], [-120.43, 36.93], [-120.25, 36.5], [-120.47, 35.97], [-121.0, 35.75], [-121.53, 35.97], [-121.75, 36.5], [-121.53, 37.03], [-121.0, 37.25], [-120.57, 37.07], [-120.75, 37.5], [-120.65, 37.75], [-120.68, 37.82], [-121.03, 37.97], [-121.18, 38.32], [-121.53, 38.47], [-121.75, 39.0], [-121.65, 39.25], [-121.68, 39.32], [-122.03, 39.47], [-122.25, 40.0], [-122.15, 40.25], [-122.25, 40.5], [-122.03, 41.03]]]]}, "2015-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.03, 41.03], [-121.5, 41.25], [-120.97, 41.03], [-120.75, 40.5], [-120.85, 40.25], [-120.82, 40.18], [-120.47, 40.03], [-120.32, 39.68], [-120.25, 39.65], [-120.0, 39.75], [-119.47, 39.53], [-119.25, 39.0], [-119.35, 38.75], [-119.32, 38.68], [-119.25, 38.65], [-119.0, 38.75], [-118.47, 38.53], [-118.25, 38.0], [-118.37, 37.7], [-117.97, 37.53], [-117.75, 37.0], [-117.85, 36.75], [-117.8, 36.63], [-117.5, 36.75], [-116.97, 36.53], [-116.82, 36.18], [-116.47, 36.03], [-116.32, 35.68], [-116.25, 35.65], [-116.18, 35.68], [-116.03, 36.03], [-115.5, 36.25], [-114.97, 36.03], [-114.82, 35.68], [-114.75, 35.65], [-114.5, 35.75], [-114.2, 35.63], [-114.15, 35.75], [-114.25, 36.0], [-114.15, 36.25], [-114.25, 36.5], [-114.03, 37.03], [-113.5, 37.25], [-112.97, 37.03], [-112.8, 36.63], [-112.68, 36.68], [-112.53, 37.03], [-112.0, 37.25], [-111.47, 37.03], [-111.25, 36.5], [-111.35, 36.25], [-111.32, 36.18], [-111.0, 36.04], [-110.5, 36.25], [-110.25, 36.15], [-110.18, 36.18], [-110.03, 36.53], [-109.5, 36.75], [-109.25, 36.65], [-109.0, 36.75], [-108.47, 36.53], [-108.32, 36.18], [-107.97, 36.03], [-107.75, 35.5], [-107.85, 35.25], [-107.75, 35.0], [-107.85, 34.75], [-107.82, 34.68], [-107.75, 34.65], [-107.5, 34.75], [-106.97, 34.53], [-106.75, 34.0], [-106.97, 33.47], [-107.32, 33.32], [-107.35, 33.25], [-107.25, 33.0], [-107.35, 32.75], [-107.25, 32.5], [-107.47, 31.97], [-108.0, 31.75], [-108.3, 31.88], [-108.35, 31.75], [-108.25, 31.5], [-108.47, 30.97], [-109.0, 30.75], [-109.25, 30.85], [-109.32, 30.82], [-109.47, 30.47], [-109.82, 30.32], [-109.97, 29.97], [-110.5, 29.75], [-111.03, 29.97], [-111.18, 30.32], [-111.25, 30.35], [-111.5, 30.25], [-111.75, 30.35], [-112.0, 30.25], [-112.25, 30.35], [-112.5, 30.25], [-112.75, 30.35], [-112.82, 30.32], [-112.85, 30.25], [-112.75, 30.0], [-112.97, 29.47], [-113.5, 29.25], [-113.75, 29.35], [-114.0, 29.25], [-114.5, 29.46], [-115.0, 29.25], [-115.53, 29.47], [-115.75, 30.0], [-115.54, 30.5], [-115.68, 30.82], [-116.03, 30.97], [-116.2, 31.38], [-116.5, 31.25], [-117.03, 31.47], [-117.25, 32.0], [-117.15, 32.25], [-117.18, 32.32], [-117.53, 32.47], [-117.75, 33.0], [-117.65, 33.25], [-117.68, 33.32], [-118.03, 33.47], [-118.18, 33.82], [-118.53, 33.97], [-118.68, 34.32], [-118.75, 34.35], [-119.0, 34.25], [-119.25, 34.35], [-119.5, 34.25], [-119.75, 34.35], [-120.0, 34.25], [-120.53, 34.47], [-120.68, 34.82], [-121.03, 34.97], [-121.25, 35.5], [-121.12, 35.8], [-121.53, 35.97], [-121.75, 36.5], [-121.53, 37.03], [-121.18, 37.18], [-121.15, 37.25], [-121.18, 37.32], [-121.53, 37.47], [-121.75, 38.0], [-121.54, 38.5], [-121.75, 39.0], [-121.65, 39.25], [-121.68, 39.32], [-122.03, 39.47], [-122.25, 40.0], [-122.15, 40.25], [-122.25, 40.5], [-122.03, 41.03]]]]}, "2015-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.03, 41.03], [-121.5, 41.25], [-120.97, 41.03], [-120.75, 40.5], [-120.85, 40.25], [-120.82, 40.18], [-120.47, 40.03], [-120.32, 39.68], [-120.25, 39.65], [-120.0, 39.75], [-119.47, 39.53], [-119.25, 39.0], [-119.35, 38.75], [-119.32, 38.68], [-119.25, 38.65], [-119.0, 38.75], [-118.47, 38.53], [-118.25, 38.0], [-118.37, 37.7], [-117.97, 37.53], [-117.75, 37.0], [-117.85, 36.75], [-117.8, 36.63], [-117.5, 36.75], [-116.97, 36.53], [-116.82, 36.18], [-116.47, 36.03], [-116.32, 35.68], [-116.25, 35.65], [-116.18, 35.68], [-116.03, 36.03], [-115.5, 36.25], [-114.97, 36.03], [-114.82, 35.68], [-114.75, 35.65], [-114.5, 35.75], [-114.2, 35.63], [-114.15, 35.75], [-114.25, 36.0], [-114.15, 36.25], [-114.25, 36.5], [-114.03, 37.03], [-113.5, 37.25], [-112.97, 37.03], [-112.8, 36.63], [-112.68, 36.68], [-112.53, 37.03], [-112.0, 37.25], [-111.47, 37.03], [-111.25, 36.5], [-111.35, 36.25], [-111.32, 36.18], [-111.0, 36.04], [-110.5, 36.25], [-110.25, 36.15], [-110.18, 36.18], [-110.15, 36.25], [-110.25, 36.5], [-110.03, 37.03], [-109.5, 37.25], [-108.97, 37.03], [-108.82, 36.68], [-108.75, 36.65], [-108.5, 36.75], [-107.97, 36.53], [-107.82, 36.18], [-107.75, 36.15], [-107.5, 36.25], [-107.25, 36.15], [-107.0, 36.25], [-106.75, 36.15], [-106.5, 36.25], [-106.25, 36.15], [-106.0, 36.25], [-105.47, 36.03], [-105.25, 35.5], [-105.47, 34.97], [-105.82, 34.82], [-105.97, 34.47], [-106.5, 34.25], [-106.93, 34.43], [-106.75, 34.0], [-106.97, 33.47], [-107.32, 33.32], [-107.35, 33.25], [-107.25, 33.0], [-107.35, 32.75], [-107.25, 32.5], [-107.47, 31.97], [-108.0, 31.75], [-108.3, 31.88], [-108.35, 31.75], [-108.25, 31.5], [-108.47, 30.97], [-109.0, 30.75], [-109.25, 30.85], [-109.32, 30.82], [-109.47, 30.47], [-109.82, 30.32], [-109.97, 29.97], [-110.5, 29.75], [-111.03, 29.97], [-111.18, 30.32], [-111.25, 30.35], [-111.5, 30.25], [-111.75, 30.35], [-112.0, 30.25], [-112.25, 30.35], [-112.5, 30.25], [-112.75, 30.35], [-112.82, 30.32], [-112.85, 30.25], [-112.75, 30.0], [-112.97, 29.47], [-113.5, 29.25], [-113.75, 29.35], [-114.0, 29.25], [-114.5, 29.46], [-115.0, 29.25], [-115.53, 29.47], [-115.75, 30.0], [-115.54, 30.5], [-115.68, 30.82], [-116.03, 30.97], [-116.2, 31.38], [-116.5, 31.25], [-117.03, 31.47], [-117.25, 32.0], [-117.15, 32.25], [-117.18, 32.32], [-117.53, 32.47], [-117.75, 33.0], [-117.65, 33.25], [-117.68, 33.32], [-118.03, 33.47], [-118.18, 33.82], [-118.53, 33.97], [-118.68, 34.32], [-118.75, 34.35], [-119.0, 34.25], [-119.25, 34.35], [-119.5, 34.25], [-119.75, 34.35], [-120.0, 34.25], [-120.53, 34.47], [-120.68, 34.82], [-121.03, 34.97], [-121.25, 35.5], [-121.12, 35.8], [-121.53, 35.97], [-121.75, 36.5], [-121.53, 37.03], [-121.18, 37.18], [-121.15, 37.25], [-121.18, 37.32], [-121.53, 37.47], [-121.75, 38.0], [-121.54, 38.5], [-121.75, 39.0], [-121.65, 39.25], [-121.68, 39.32], [-122.03, 39.47], [-122.25, 40.0], [-122.15, 40.25], [-122.25, 40.5], [-122.03, 41.03]], [[-107.32, 34.82], [-107.37, 34.7], [-107.07, 34.57], [-107.18, 34.82], [-107.25, 34.85], [-107.32, 34.82]]]]}, "2015-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.75, 38.0], [-121.53, 38.53], [-121.0, 38.75], [-120.47, 38.53], [-120.32, 38.18], [-120.25, 38.15], [-120.0, 38.25], [-119.47, 38.03], [-119.32, 37.68], [-118.97, 37.53], [-118.75, 37.0], [-118.85, 36.75], [-118.82, 36.68], [-118.75, 36.65], [-118.5, 36.75], [-118.0, 36.54], [-117.5, 36.75], [-116.97, 36.53], [-116.82, 36.18], [-116.47, 36.03], [-116.32, 35.68], [-116.25, 35.65], [-116.18, 35.68], [-116.03, 36.03], [-115.5, 36.25], [-114.97, 36.03], [-114.82, 35.68], [-114.75, 35.65], [-114.5, 35.75], [-114.2, 35.63], [-114.15, 35.75], [-114.25, 36.0], [-114.15, 36.25], [-114.25, 36.5], [-114.03, 37.03], [-113.5, 37.25], [-112.97, 37.03], [-112.8, 36.63], [-112.68, 36.68], [-112.53, 37.03], [-112.0, 37.25], [-111.47, 37.03], [-111.25, 36.5], [-111.35, 36.25], [-111.32, 36.18], [-111.0, 36.04], [-110.5, 36.25], [-110.25, 36.15], [-110.18, 36.18], [-110.15, 36.25], [-110.25, 36.5], [-110.03, 37.03], [-109.5, 37.25], [-108.97, 37.03], [-108.82, 36.68], [-108.75, 36.65], [-108.5, 36.75], [-107.97, 36.53], [-107.82, 36.18], [-107.75, 36.15], [-107.5, 36.25], [-107.25, 36.15], [-107.0, 36.25], [-106.75, 36.15], [-106.5, 36.25], [-106.25, 36.15], [-106.0, 36.25], [-105.47, 36.03], [-105.25, 35.5], [-105.47, 34.97], [-105.82, 34.82], [-105.97, 34.47], [-106.5, 34.25], [-106.93, 34.43], [-106.75, 34.0], [-106.97, 33.47], [-107.32, 33.32], [-107.35, 33.25], [-107.25, 33.0], [-107.35, 32.75], [-107.25, 32.5], [-107.47, 31.97], [-108.0, 31.75], [-108.3, 31.88], [-108.35, 31.75], [-108.25, 31.5], [-108.47, 30.97], [-109.0, 30.75], [-109.25, 30.85], [-109.32, 30.82], [-109.47, 30.47], [-109.82, 30.32], [-109.97, 29.97], [-110.5, 29.75], [-111.03, 29.97], [-111.18, 30.32], [-111.25, 30.35], [-111.5, 30.25], [-111.75, 30.35], [-112.0, 30.25], [-112.25, 30.35], [-112.5, 30.25], [-112.75, 30.35], [-112.82, 30.32], [-112.85, 30.25], [-112.75, 30.0], [-112.97, 29.47], [-113.5, 29.25], [-113.75, 29.35], [-114.0, 29.25], [-114.5, 29.46], [-115.0, 29.25], [-115.53, 29.47], [-115.75, 30.0], [-115.54, 30.5], [-115.68, 30.82], [-116.03, 30.97], [-116.2, 31.38], [-116.5, 31.25], [-117.03, 31.47], [-117.25, 32.0], [-117.15, 32.25], [-117.18, 32.32], [-117.53, 32.47], [-117.75, 33.0], [-117.65, 33.25], [-117.68, 33.32], [-118.03, 33.47], [-118.25, 34.0], [-118.15, 34.25], [-118.18, 34.32], [-118.53, 34.47], [-118.68, 34.82], [-118.75, 34.85], [-119.0, 34.75], [-119.25, 34.85], [-119.5, 34.75], [-120.0, 34.96], [-120.5, 34.75], [-121.03, 34.97], [-121.25, 35.5], [-121.04, 36.0], [-121.25, 36.5], [-121.15, 36.75], [-121.25, 37.0], [-121.15, 37.25], [-121.18, 37.32], [-121.53, 37.47], [-121.75, 38.0]], [[-107.32, 34.82], [-107.37, 34.7], [-107.07, 34.57], [-107.18, 34.82], [-107.25, 34.85], [-107.32, 34.82]]]]}, "2015-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.25, 32.5], [-111.47, 31.97], [-112.0, 31.75], [-112.53, 31.97], [-112.75, 32.5], [-112.53, 33.03], [-112.0, 33.25], [-111.47, 33.03], [-111.25, 32.5]]], [[[-116.0, 33.75], [-115.7, 33.63], [-115.53, 34.03], [-115.18, 34.18], [-115.03, 34.53], [-114.5, 34.75], [-113.97, 34.53], [-113.75, 34.0], [-113.85, 33.75], [-113.75, 33.5], [-113.85, 33.25], [-113.8, 33.13], [-113.5, 33.25], [-112.97, 33.03], [-112.75, 32.5], [-112.97, 31.97], [-113.5, 31.75], [-113.8, 31.88], [-113.85, 31.75], [-113.75, 31.5], [-113.97, 30.97], [-114.5, 30.75], [-114.75, 30.85], [-115.0, 30.75], [-115.53, 30.97], [-115.75, 31.5], [-115.65, 31.75], [-115.68, 31.82], [-116.03, 31.97], [-116.18, 32.32], [-116.53, 32.47], [-116.75, 33.0], [-116.53, 33.53], [-116.0, 33.75]]], [[[-109.25, 33.0], [-109.03, 33.53], [-108.5, 33.75], [-107.97, 33.53], [-107.75, 33.0], [-107.97, 32.47], [-108.5, 32.25], [-109.03, 32.47], [-109.25, 33.0]]], [[[-110.15, 36.25], [-110.25, 36.5], [-110.03, 37.03], [-109.5, 37.25], [-108.97, 37.03], [-108.8, 36.63], [-108.5, 36.75], [-107.97, 36.53], [-107.82, 36.18], [-107.75, 36.15], [-107.5, 36.25], [-107.25, 36.15], [-107.0, 36.25], [-106.75, 36.15], [-106.5, 36.25], [-106.25, 36.15], [-106.0, 36.25], [-105.47, 36.03], [-105.25, 35.5], [-105.47, 34.97], [-105.82, 34.82], [-105.97, 34.47], [-106.5, 34.25], [-107.03, 34.47], [-107.18, 34.82], [-107.25, 34.85], [-107.32, 34.82], [-107.47, 34.47], [-108.0, 34.25], [-108.3, 34.38], [-108.47, 33.97], [-109.0, 33.75], [-109.43, 33.93], [-109.25, 33.5], [-109.47, 32.97], [-110.0, 32.75], [-110.53, 32.97], [-110.75, 33.5], [-110.53, 34.03], [-110.0, 34.25], [-109.57, 34.07], [-109.68, 34.32], [-110.03, 34.47], [-110.25, 35.0], [-110.15, 35.25], [-110.25, 35.5], [-110.15, 35.75], [-110.25, 36.0], [-110.15, 36.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.473319791575761}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.513673474201558}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-1.6601552623508269, 2.416262602882739, 1.177699273034932, 2.1351810683209465, 1.239729159974047]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.934827183401069, -15.107587443374086, -14.141388189280178, -13.63980285929523, -8.363699859260919]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.7372184677680025, -5.263062784238159, -6.019715724443038, -5.463191553909152, -4.629412042624315]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.533616313827167, -11.060494147407098, -12.473319791575761, -12.265057460105709, -6.568696137096936]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6089976060730433, -1.811741931918887, -2.073444453822971, -1.9406868720076242, -1.487936137064377]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.065910524996462, -2.963075432236029, -3.327386759052288, -3.1045666953067506, -1.7692900333542523]}}