{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:27.433932", "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": "2017-Jul-15_to_2017-Jul-19_257.0_70.0"}, "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": 2017070000642}, "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": "July 15 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 19 2017"}, "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": 186731.30298955564}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "N.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": ["The Northwestern Passages"]}, "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": 70.0}, "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": 257.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "257.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 236.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 258.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 68.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 74.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.03, 73.47], [-124.25, 74.0], [-124.03, 74.53], [-123.5, 74.75], [-123.25, 74.65], [-123.0, 74.75], [-122.75, 74.65], [-122.5, 74.75], [-122.25, 74.65], [-122.0, 74.75], [-121.75, 74.65], [-121.5, 74.75], [-121.25, 74.65], [-121.0, 74.75], [-120.75, 74.65], [-120.5, 74.75], [-119.97, 74.53], [-119.82, 74.18], [-119.75, 74.15], [-119.5, 74.25], [-119.25, 74.15], [-119.0, 74.25], [-118.75, 74.15], [-118.5, 74.25], [-117.97, 74.03], [-117.75, 73.5], [-117.97, 72.97], [-118.5, 72.75], [-118.75, 72.85], [-119.0, 72.75], [-119.25, 72.85], [-119.5, 72.75], [-119.75, 72.85], [-120.0, 72.75], [-120.25, 72.85], [-120.5, 72.75], [-120.75, 72.85], [-121.0, 72.75], [-121.25, 72.85], [-121.5, 72.75], [-121.75, 72.85], [-122.0, 72.75], [-122.25, 72.85], [-122.5, 72.75], [-123.03, 72.97], [-123.18, 73.32], [-123.25, 73.35], [-123.5, 73.25], [-124.03, 73.47]]]]}, "2017-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.03, 73.47], [-124.25, 74.0], [-124.03, 74.53], [-123.5, 74.75], [-123.25, 74.65], [-123.0, 74.75], [-122.75, 74.65], [-122.5, 74.75], [-122.25, 74.65], [-122.0, 74.75], [-121.75, 74.65], [-121.5, 74.75], [-121.25, 74.65], [-121.0, 74.75], [-120.75, 74.65], [-120.5, 74.75], [-120.25, 74.65], [-120.0, 74.75], [-119.75, 74.65], [-119.5, 74.75], [-119.25, 74.65], [-119.0, 74.75], [-118.75, 74.65], [-118.5, 74.75], [-118.25, 74.65], [-118.0, 74.75], [-117.75, 74.65], [-117.5, 74.75], [-117.25, 74.65], [-117.0, 74.75], [-116.47, 74.53], [-116.32, 74.18], [-116.25, 74.15], [-116.0, 74.25], [-115.47, 74.03], [-115.32, 73.68], [-115.25, 73.65], [-115.0, 73.75], [-114.75, 73.65], [-114.5, 73.75], [-114.25, 73.65], [-114.0, 73.75], [-113.47, 73.53], [-113.32, 73.18], [-113.25, 73.15], [-113.0, 73.25], [-112.75, 73.15], [-112.5, 73.25], [-112.25, 73.15], [-112.0, 73.25], [-111.75, 73.15], [-111.5, 73.25], [-111.25, 73.15], [-111.0, 73.25], [-110.5, 73.04], [-110.0, 73.25], [-109.47, 73.03], [-109.32, 72.68], [-109.25, 72.65], [-109.0, 72.75], [-108.75, 72.65], [-108.5, 72.75], [-108.25, 72.65], [-108.0, 72.75], [-107.47, 72.53], [-107.32, 72.18], [-107.25, 72.15], [-107.0, 72.25], [-106.47, 72.03], [-106.32, 71.68], [-106.25, 71.65], [-106.18, 71.68], [-106.03, 72.03], [-105.5, 72.25], [-105.25, 72.15], [-105.18, 72.18], [-105.03, 72.53], [-104.5, 72.75], [-103.97, 72.53], [-103.75, 72.0], [-103.85, 71.75], [-103.75, 71.5], [-103.85, 71.25], [-103.82, 71.18], [-103.75, 71.15], [-103.5, 71.25], [-102.97, 71.03], [-102.82, 70.68], [-102.75, 70.65], [-102.5, 70.75], [-102.25, 70.65], [-102.0, 70.75], [-101.47, 70.53], [-101.25, 70.0], [-101.47, 69.47], [-102.0, 69.25], [-102.25, 69.35], [-102.5, 69.25], [-102.75, 69.35], [-102.82, 69.32], [-102.97, 68.97], [-103.5, 68.75], [-103.75, 68.85], [-104.0, 68.75], [-104.25, 68.85], [-104.5, 68.75], [-104.75, 68.85], [-105.0, 68.75], [-105.25, 68.85], [-105.5, 68.75], [-106.03, 68.97], [-106.18, 69.32], [-106.25, 69.35], [-106.5, 69.25], [-106.75, 69.35], [-106.82, 69.32], [-106.97, 68.97], [-107.5, 68.75], [-107.75, 68.85], [-108.0, 68.75], [-108.25, 68.85], [-108.32, 68.82], [-108.47, 68.47], [-109.0, 68.25], [-109.25, 68.35], [-109.5, 68.25], [-109.75, 68.35], [-110.0, 68.25], [-110.25, 68.35], [-110.5, 68.25], [-110.75, 68.35], [-111.0, 68.25], [-111.25, 68.35], [-111.5, 68.25], [-112.03, 68.47], [-112.18, 68.82], [-112.25, 68.85], [-112.5, 68.75], [-112.75, 68.85], [-113.0, 68.75], [-113.53, 68.97], [-113.75, 69.5], [-113.65, 69.75], [-113.75, 70.0], [-113.62, 70.3], [-113.75, 70.35], [-114.0, 70.25], [-114.25, 70.35], [-114.5, 70.25], [-114.75, 70.35], [-115.0, 70.25], [-115.25, 70.35], [-115.5, 70.25], [-116.03, 70.47], [-116.25, 71.0], [-116.12, 71.3], [-116.53, 71.47], [-116.68, 71.82], [-116.75, 71.85], [-117.0, 71.75], [-117.25, 71.85], [-117.5, 71.75], [-118.03, 71.97], [-118.2, 72.38], [-118.5, 72.25], [-118.75, 72.35], [-119.0, 72.25], [-119.25, 72.35], [-119.5, 72.25], [-119.75, 72.35], [-120.0, 72.25], [-120.25, 72.35], [-120.32, 72.32], [-120.47, 71.97], [-120.82, 71.82], [-120.97, 71.47], [-121.5, 71.25], [-121.75, 71.35], [-122.0, 71.25], [-122.25, 71.35], [-122.5, 71.25], [-122.75, 71.35], [-123.0, 71.25], [-123.53, 71.47], [-123.75, 72.0], [-123.53, 72.53], [-123.0, 72.75], [-122.75, 72.65], [-122.5, 72.75], [-123.03, 72.97], [-123.18, 73.32], [-123.25, 73.35], [-123.5, 73.25], [-124.03, 73.47]], [[-122.25, 72.65], [-122.18, 72.68], [-122.12, 72.8], [-122.25, 72.85], [-122.5, 72.75], [-122.25, 72.65]]]]}, "2017-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.03, 73.47], [-124.25, 74.0], [-124.03, 74.53], [-123.5, 74.75], [-123.25, 74.65], [-123.0, 74.75], [-122.75, 74.65], [-122.5, 74.75], [-122.25, 74.65], [-122.0, 74.75], [-121.75, 74.65], [-121.5, 74.75], [-121.25, 74.65], [-121.0, 74.75], [-120.75, 74.65], [-120.5, 74.75], [-120.25, 74.65], [-120.0, 74.75], [-119.75, 74.65], [-119.5, 74.75], [-119.25, 74.65], [-119.0, 74.75], [-118.75, 74.65], [-118.5, 74.75], [-118.25, 74.65], [-118.0, 74.75], [-117.75, 74.65], [-117.5, 74.75], [-117.25, 74.65], [-117.0, 74.75], [-116.47, 74.53], [-116.32, 74.18], [-116.25, 74.15], [-116.0, 74.25], [-115.47, 74.03], [-115.32, 73.68], [-115.25, 73.65], [-115.0, 73.75], [-114.75, 73.65], [-114.5, 73.75], [-114.25, 73.65], [-114.0, 73.75], [-113.47, 73.53], [-113.32, 73.18], [-113.25, 73.15], [-113.0, 73.25], [-112.75, 73.15], [-112.5, 73.25], [-112.25, 73.15], [-112.0, 73.25], [-111.75, 73.15], [-111.5, 73.25], [-111.25, 73.15], [-111.0, 73.25], [-110.5, 73.04], [-110.0, 73.25], [-109.47, 73.03], [-109.32, 72.68], [-109.25, 72.65], [-109.0, 72.75], [-108.75, 72.65], [-108.5, 72.75], [-108.25, 72.65], [-108.0, 72.75], [-107.47, 72.53], [-107.32, 72.18], [-107.25, 72.15], [-107.0, 72.25], [-106.47, 72.03], [-106.32, 71.68], [-106.25, 71.65], [-106.18, 71.68], [-106.03, 72.03], [-105.5, 72.25], [-105.25, 72.15], [-105.18, 72.18], [-105.03, 72.53], [-104.5, 72.75], [-103.97, 72.53], [-103.75, 72.0], [-103.85, 71.75], [-103.75, 71.5], [-103.85, 71.25], [-103.82, 71.18], [-103.75, 71.15], [-103.5, 71.25], [-103.25, 71.15], [-103.0, 71.25], [-102.75, 71.15], [-102.5, 71.25], [-102.25, 71.15], [-102.0, 71.25], [-101.47, 71.03], [-101.25, 70.5], [-101.35, 70.25], [-101.25, 70.0], [-101.47, 69.47], [-102.0, 69.25], [-102.25, 69.35], [-102.37, 69.3], [-102.25, 69.0], [-102.47, 68.47], [-103.0, 68.25], [-103.25, 68.35], [-103.5, 68.25], [-104.03, 68.47], [-104.18, 68.82], [-104.25, 68.85], [-104.5, 68.75], [-104.75, 68.85], [-105.0, 68.75], [-105.25, 68.85], [-105.5, 68.75], [-106.03, 68.97], [-106.18, 69.32], [-106.25, 69.35], [-106.5, 69.25], [-106.75, 69.35], [-106.82, 69.32], [-106.97, 68.97], [-107.5, 68.75], [-107.75, 68.85], [-108.0, 68.75], [-108.25, 68.85], [-108.32, 68.82], [-108.47, 68.47], [-109.0, 68.25], [-109.25, 68.35], [-109.5, 68.25], [-109.75, 68.35], [-110.0, 68.25], [-110.25, 68.35], [-110.5, 68.25], [-110.75, 68.35], [-111.0, 68.25], [-111.25, 68.35], [-111.5, 68.25], [-112.03, 68.47], [-112.18, 68.82], [-112.25, 68.85], [-112.5, 68.75], [-112.75, 68.85], [-113.0, 68.75], [-113.53, 68.97], [-113.75, 69.5], [-113.65, 69.75], [-113.75, 70.0], [-113.62, 70.3], [-113.75, 70.35], [-114.0, 70.25], [-114.25, 70.35], [-114.5, 70.25], [-114.75, 70.35], [-115.0, 70.25], [-115.25, 70.35], [-115.5, 70.25], [-116.03, 70.47], [-116.25, 71.0], [-116.12, 71.3], [-116.53, 71.47], [-116.68, 71.82], [-116.75, 71.85], [-117.0, 71.75], [-117.25, 71.85], [-117.5, 71.75], [-118.03, 71.97], [-118.2, 72.38], [-118.5, 72.25], [-118.75, 72.35], [-119.0, 72.25], [-119.25, 72.35], [-119.5, 72.25], [-119.75, 72.35], [-120.0, 72.25], [-120.25, 72.35], [-120.32, 72.32], [-120.47, 71.97], [-120.82, 71.82], [-120.97, 71.47], [-121.5, 71.25], [-121.75, 71.35], [-122.0, 71.25], [-122.25, 71.35], [-122.5, 71.25], [-122.75, 71.35], [-123.0, 71.25], [-123.53, 71.47], [-123.75, 72.0], [-123.53, 72.53], [-123.0, 72.75], [-122.75, 72.65], [-122.5, 72.75], [-123.03, 72.97], [-123.18, 73.32], [-123.25, 73.35], [-123.5, 73.25], [-124.03, 73.47]], [[-122.25, 72.65], [-122.18, 72.68], [-122.12, 72.8], [-122.25, 72.85], [-122.5, 72.75], [-122.25, 72.65]]]]}, "2017-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.53, 71.47], [-123.75, 72.0], [-123.53, 72.53], [-123.0, 72.75], [-122.75, 72.65], [-122.5, 72.75], [-122.25, 72.65], [-122.18, 72.68], [-122.03, 73.03], [-121.68, 73.18], [-121.62, 73.3], [-122.03, 73.47], [-122.25, 74.0], [-122.03, 74.53], [-121.5, 74.75], [-121.25, 74.65], [-121.0, 74.75], [-120.75, 74.65], [-120.5, 74.75], [-120.25, 74.65], [-120.0, 74.75], [-119.75, 74.65], [-119.5, 74.75], [-119.25, 74.65], [-119.0, 74.75], [-118.75, 74.65], [-118.5, 74.75], [-118.25, 74.65], [-118.0, 74.75], [-117.75, 74.65], [-117.5, 74.75], [-117.25, 74.65], [-117.0, 74.75], [-116.47, 74.53], [-116.32, 74.18], [-116.25, 74.15], [-116.0, 74.25], [-115.47, 74.03], [-115.32, 73.68], [-115.25, 73.65], [-115.0, 73.75], [-114.75, 73.65], [-114.5, 73.75], [-114.25, 73.65], [-114.0, 73.75], [-113.47, 73.53], [-113.32, 73.18], [-113.25, 73.15], [-113.0, 73.25], [-112.75, 73.15], [-112.5, 73.25], [-112.25, 73.15], [-112.0, 73.25], [-111.75, 73.15], [-111.5, 73.25], [-111.25, 73.15], [-111.0, 73.25], [-110.5, 73.04], [-110.0, 73.25], [-109.47, 73.03], [-109.32, 72.68], [-109.25, 72.65], [-109.0, 72.75], [-108.75, 72.65], [-108.5, 72.75], [-108.25, 72.65], [-108.0, 72.75], [-107.47, 72.53], [-107.32, 72.18], [-107.25, 72.15], [-107.0, 72.25], [-106.47, 72.03], [-106.32, 71.68], [-106.25, 71.65], [-106.18, 71.68], [-106.03, 72.03], [-105.5, 72.25], [-105.25, 72.15], [-105.18, 72.18], [-105.03, 72.53], [-104.5, 72.75], [-103.97, 72.53], [-103.75, 72.0], [-103.85, 71.75], [-103.75, 71.5], [-103.85, 71.25], [-103.82, 71.18], [-103.75, 71.15], [-103.5, 71.25], [-103.25, 71.15], [-103.0, 71.25], [-102.75, 71.15], [-102.5, 71.25], [-102.25, 71.15], [-102.0, 71.25], [-101.47, 71.03], [-101.25, 70.5], [-101.35, 70.25], [-101.25, 70.0], [-101.47, 69.47], [-102.0, 69.25], [-102.25, 69.35], [-102.37, 69.3], [-102.25, 69.0], [-102.47, 68.47], [-103.0, 68.25], [-103.25, 68.35], [-103.5, 68.25], [-104.03, 68.47], [-104.18, 68.82], [-104.25, 68.85], [-104.5, 68.75], [-104.75, 68.85], [-105.0, 68.75], [-105.25, 68.85], [-105.5, 68.75], [-106.03, 68.97], [-106.18, 69.32], [-106.25, 69.35], [-106.5, 69.25], [-106.75, 69.35], [-106.82, 69.32], [-106.97, 68.97], [-107.5, 68.75], [-107.75, 68.85], [-108.0, 68.75], [-108.25, 68.85], [-108.32, 68.82], [-108.47, 68.47], [-109.0, 68.25], [-109.25, 68.35], [-109.5, 68.25], [-109.75, 68.35], [-110.0, 68.25], [-110.25, 68.35], [-110.5, 68.25], [-110.75, 68.35], [-111.0, 68.25], [-111.25, 68.35], [-111.5, 68.25], [-112.03, 68.47], [-112.18, 68.82], [-112.25, 68.85], [-112.5, 68.75], [-112.75, 68.85], [-113.0, 68.75], [-113.53, 68.97], [-113.75, 69.5], [-113.65, 69.75], [-113.75, 70.0], [-113.62, 70.3], [-113.75, 70.35], [-114.0, 70.25], [-114.25, 70.35], [-114.5, 70.25], [-114.75, 70.35], [-115.0, 70.25], [-115.25, 70.35], [-115.5, 70.25], [-116.03, 70.47], [-116.25, 71.0], [-116.12, 71.3], [-116.53, 71.47], [-116.68, 71.82], [-116.75, 71.85], [-117.0, 71.75], [-117.25, 71.85], [-117.5, 71.75], [-118.03, 71.97], [-118.2, 72.38], [-118.5, 72.25], [-118.75, 72.35], [-119.0, 72.25], [-119.25, 72.35], [-119.5, 72.25], [-119.75, 72.35], [-120.0, 72.25], [-120.25, 72.35], [-120.32, 72.32], [-120.47, 71.97], [-120.82, 71.82], [-120.97, 71.47], [-121.5, 71.25], [-121.75, 71.35], [-122.0, 71.25], [-122.25, 71.35], [-122.5, 71.25], [-122.75, 71.35], [-123.0, 71.25], [-123.53, 71.47]]]]}, "2017-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.03, 70.53], [-104.68, 70.68], [-104.53, 71.03], [-104.0, 71.25], [-103.75, 71.15], [-103.5, 71.25], [-103.25, 71.15], [-103.0, 71.25], [-102.75, 71.15], [-102.5, 71.25], [-102.25, 71.15], [-102.0, 71.25], [-101.47, 71.03], [-101.25, 70.5], [-101.35, 70.25], [-101.25, 70.0], [-101.47, 69.47], [-102.0, 69.25], [-102.25, 69.35], [-102.37, 69.3], [-102.25, 69.0], [-102.47, 68.47], [-103.0, 68.25], [-103.25, 68.35], [-103.5, 68.25], [-104.03, 68.47], [-104.18, 68.82], [-104.53, 68.97], [-104.68, 69.32], [-105.03, 69.47], [-105.25, 70.0], [-105.03, 70.53]]], [[[-108.0, 72.75], [-107.47, 72.53], [-107.32, 72.18], [-106.97, 72.03], [-106.82, 71.68], [-106.47, 71.53], [-106.25, 71.0], [-106.47, 70.47], [-107.0, 70.25], [-107.25, 70.35], [-107.5, 70.25], [-108.03, 70.47], [-108.18, 70.82], [-108.53, 70.97], [-108.75, 71.5], [-108.65, 71.75], [-108.75, 72.0], [-108.53, 72.53], [-108.0, 72.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.9206883626054605}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.958546000108563}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.8308779471769867, 2.9004333844968073, 3.5686136564130493, 3.575100561964746, 4.057653009168973]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.9052260454974999, -0.0781660797524637, 0.061116965014434754, 0.8050532759821749, 2.2311064305846458]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.625449300878628, -6.333070647313577, -5.746908136899548, -5.931458153428125, -5.01772947812367]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.04894468584456, -7.9206883626054605, -6.685286811700394, -7.303170461877926, -6.012226899563814]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.163264806985188, -1.5801419620753705, -1.4461921405170943, -1.4893607062055443, -1.4295722566712092]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2190214365943408, -1.9307408811095894, -1.6812846072425196, -1.824982607729613, -1.6571136403238036]}}