{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:54.228384", "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": "2011-Mar-03_to_2011-Mar-06_245.5_61.5"}, "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": 2011030000328}, "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 03 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 06 2011"}, "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": 50906.44364348369}, "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.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": []}, "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": 61.5}, "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": 245.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "245.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 243.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 248.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 63.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.53, 62.47], [-116.75, 63.0], [-116.53, 63.53], [-116.0, 63.75], [-115.75, 63.65], [-115.5, 63.75], [-115.25, 63.65], [-115.0, 63.75], [-114.75, 63.65], [-114.5, 63.75], [-113.97, 63.53], [-113.82, 63.18], [-113.75, 63.15], [-113.68, 63.18], [-113.53, 63.53], [-113.0, 63.75], [-112.75, 63.65], [-112.5, 63.75], [-111.97, 63.53], [-111.75, 63.0], [-111.85, 62.75], [-111.82, 62.68], [-111.75, 62.65], [-111.5, 62.75], [-110.97, 62.53], [-110.75, 62.0], [-110.85, 61.75], [-110.75, 61.5], [-110.85, 61.25], [-110.75, 61.0], [-110.97, 60.47], [-111.5, 60.25], [-112.0, 60.46], [-112.5, 60.25], [-112.75, 60.35], [-113.0, 60.25], [-113.5, 60.46], [-114.0, 60.25], [-114.53, 60.47], [-114.68, 60.82], [-114.8, 60.88], [-114.97, 60.47], [-115.5, 60.25], [-116.03, 60.47], [-116.25, 61.0], [-116.03, 61.53], [-115.5, 61.75], [-115.2, 61.63], [-115.12, 61.8], [-115.53, 61.97], [-115.68, 62.32], [-115.75, 62.35], [-116.0, 62.25], [-116.53, 62.47]]]]}, "2011-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.62, 62.2], [-115.68, 62.32], [-115.75, 62.35], [-116.0, 62.25], [-116.53, 62.47], [-116.75, 63.0], [-116.53, 63.53], [-116.0, 63.75], [-115.75, 63.65], [-115.5, 63.75], [-115.25, 63.65], [-115.0, 63.75], [-114.75, 63.65], [-114.5, 63.75], [-113.97, 63.53], [-113.82, 63.18], [-113.75, 63.15], [-113.68, 63.18], [-113.53, 63.53], [-113.0, 63.75], [-112.75, 63.65], [-112.5, 63.75], [-111.97, 63.53], [-111.75, 63.0], [-111.85, 62.75], [-111.82, 62.68], [-111.75, 62.65], [-111.5, 62.75], [-110.97, 62.53], [-110.75, 62.0], [-110.85, 61.75], [-110.75, 61.5], [-110.85, 61.25], [-110.75, 61.0], [-110.97, 60.47], [-111.5, 60.25], [-112.0, 60.46], [-112.5, 60.25], [-112.75, 60.35], [-113.0, 60.25], [-113.5, 60.46], [-114.0, 60.25], [-114.5, 60.46], [-115.0, 60.25], [-115.25, 60.35], [-115.5, 60.25], [-115.75, 60.35], [-116.0, 60.25], [-116.53, 60.47], [-116.75, 61.0], [-116.53, 61.53], [-116.18, 61.68], [-116.03, 62.03], [-115.62, 62.2]]]]}, "2011-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.62, 62.2], [-115.68, 62.32], [-115.75, 62.35], [-116.0, 62.25], [-116.53, 62.47], [-116.75, 63.0], [-116.53, 63.53], [-116.0, 63.75], [-115.75, 63.65], [-115.5, 63.75], [-115.25, 63.65], [-115.0, 63.75], [-114.75, 63.65], [-114.5, 63.75], [-113.97, 63.53], [-113.82, 63.18], [-113.75, 63.15], [-113.68, 63.18], [-113.53, 63.53], [-113.0, 63.75], [-112.75, 63.65], [-112.5, 63.75], [-111.97, 63.53], [-111.75, 63.0], [-111.85, 62.75], [-111.82, 62.68], [-111.75, 62.65], [-111.5, 62.75], [-110.97, 62.53], [-110.75, 62.0], [-110.85, 61.75], [-110.75, 61.5], [-110.85, 61.25], [-110.75, 61.0], [-110.97, 60.47], [-111.5, 60.25], [-112.0, 60.46], [-112.5, 60.25], [-112.75, 60.35], [-113.0, 60.25], [-113.5, 60.46], [-114.0, 60.25], [-114.5, 60.46], [-115.0, 60.25], [-115.25, 60.35], [-115.5, 60.25], [-115.75, 60.35], [-116.0, 60.25], [-116.53, 60.47], [-116.75, 61.0], [-116.53, 61.53], [-116.18, 61.68], [-116.03, 62.03], [-115.62, 62.2]]]]}, "2011-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.5, 62.25], [-115.25, 62.15], [-115.18, 62.18], [-115.03, 62.53], [-114.5, 62.75], [-114.25, 62.65], [-114.0, 62.75], [-113.75, 62.65], [-113.5, 62.75], [-113.25, 62.65], [-113.0, 62.75], [-112.75, 62.65], [-112.5, 62.75], [-112.25, 62.65], [-112.0, 62.75], [-111.47, 62.53], [-111.25, 62.0], [-111.47, 61.47], [-112.0, 61.25], [-112.25, 61.35], [-112.5, 61.25], [-112.75, 61.35], [-112.82, 61.32], [-112.97, 60.97], [-113.5, 60.75], [-113.75, 60.85], [-114.0, 60.75], [-114.25, 60.85], [-114.32, 60.82], [-114.47, 60.47], [-115.0, 60.25], [-115.25, 60.35], [-115.5, 60.25], [-115.75, 60.35], [-116.0, 60.25], [-116.53, 60.47], [-116.75, 61.0], [-116.53, 61.53], [-116.18, 61.68], [-116.03, 62.03], [-115.5, 62.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.479805822159875}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.167091280788489}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-30.63393217926793, -31.847338271114836, -31.737945369599174, -28.72929132011444]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-34.314062688795474, -36.18747536714429, -35.26905097407459, -30.184722767446004]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.598688298470416, -11.801953754851995, -11.712315747408567, -9.434880319761161]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.006900639246567, -13.68797586402414, -14.479805822159875, -10.090706122365305]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3074478692198577, -1.482930811094049, -1.474942055419625, -1.283889706909639]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3913308235999977, -1.61858653614727, -1.6663467758514263, -1.3568080445308512]}}