{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:13:10.396662", "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": "2018-Jul-10_to_2018-Jul-13_246.0_34.5"}, "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": 2018070000538}, "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 10 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 13 2018"}, "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": 120550.31483527704}, "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": ["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": []}, "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": 34.5}, "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": 246.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "246.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 244.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 250.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.15, 34.75], [-115.25, 35.0], [-115.15, 35.25], [-115.25, 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34.25], [-115.25, 34.5], [-115.15, 34.75]]]]}, "2018-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.18, 35.68], [-115.03, 36.03], [-114.5, 36.25], [-114.25, 36.15], [-114.0, 36.25], [-113.75, 36.15], [-113.5, 36.25], [-112.97, 36.03], [-112.75, 35.5], [-112.85, 35.25], [-112.82, 35.18], [-112.75, 35.15], [-112.5, 35.25], [-112.0, 35.04], [-111.5, 35.25], [-111.25, 35.15], [-111.0, 35.25], [-110.75, 35.15], [-110.5, 35.25], [-110.25, 35.15], [-110.0, 35.25], [-109.47, 35.03], [-109.25, 34.5], [-109.35, 34.25], [-109.25, 34.0], [-109.46, 33.5], [-109.25, 33.0], [-109.47, 32.47], [-110.0, 32.25], [-110.25, 32.35], [-110.5, 32.25], [-111.03, 32.47], [-111.18, 32.82], [-111.25, 32.85], [-111.5, 32.75], [-111.75, 32.85], [-111.82, 32.82], [-111.85, 32.75], [-111.75, 32.5], [-111.85, 32.25], [-111.75, 32.0], [-111.97, 31.47], [-112.5, 31.25], [-113.03, 31.47], [-113.18, 31.82], [-113.25, 31.85], [-113.5, 31.75], [-113.75, 31.85], [-114.0, 31.75], [-114.53, 31.97], [-114.75, 32.5], [-114.65, 32.75], [-114.75, 33.0], [-114.65, 33.25], [-114.68, 33.32], [-115.03, 33.47], [-115.18, 33.82], [-115.25, 33.85], [-115.5, 33.75], [-116.03, 33.97], [-116.25, 34.5], [-116.03, 35.03], [-115.68, 35.18], [-115.53, 35.53], [-115.18, 35.68]]]]}, "2018-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.18, 35.68], [-115.03, 36.03], [-114.5, 36.25], [-114.25, 36.15], [-114.0, 36.25], [-113.75, 36.15], [-113.5, 36.25], [-112.97, 36.03], [-112.75, 35.5], [-112.85, 35.25], [-112.82, 35.18], [-112.75, 35.15], [-112.5, 35.25], [-112.0, 35.04], [-111.5, 35.25], [-111.25, 35.15], [-111.0, 35.25], [-110.75, 35.15], [-110.5, 35.25], [-110.25, 35.15], [-110.0, 35.25], [-109.47, 35.03], [-109.25, 34.5], [-109.35, 34.25], [-109.25, 34.0], [-109.46, 33.5], [-109.25, 33.0], [-109.47, 32.47], [-110.0, 32.25], [-110.25, 32.35], [-110.5, 32.25], [-111.03, 32.47], [-111.18, 32.82], [-111.25, 32.85], [-111.5, 32.75], [-111.75, 32.85], [-111.82, 32.82], [-111.85, 32.75], [-111.75, 32.5], [-111.85, 32.25], [-111.75, 32.0], [-111.97, 31.47], [-112.5, 31.25], [-113.03, 31.47], [-113.18, 31.82], [-113.25, 31.85], [-113.5, 31.75], [-113.75, 31.85], [-114.0, 31.75], [-114.53, 31.97], [-114.75, 32.5], [-114.65, 32.75], [-114.75, 33.0], [-114.65, 33.25], [-114.68, 33.32], [-115.03, 33.47], [-115.18, 33.82], [-115.25, 33.85], [-115.5, 33.75], [-116.03, 33.97], [-116.25, 34.5], [-116.03, 35.03], [-115.68, 35.18], [-115.53, 35.53], [-115.18, 35.68]]]]}, "2018-07-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.0, 35.75], [-114.7, 35.63], [-114.53, 36.03], [-114.0, 36.25], [-113.75, 36.15], [-113.5, 36.25], [-112.97, 36.03], [-112.75, 35.5], [-112.97, 34.97], [-113.32, 34.82], [-113.35, 34.75], [-113.25, 34.5], [-113.47, 33.97], [-114.0, 33.75], [-114.5, 33.96], [-115.0, 33.75], [-115.25, 33.85], [-115.5, 33.75], [-116.03, 33.97], [-116.25, 34.5], [-116.03, 35.03], [-115.68, 35.18], [-115.53, 35.53], [-115.0, 35.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.702107562494973}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.198605113807346}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.36362964587306, 26.910547321495528, 26.79442747233537, 27.394518833125517]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.761968069822785, 17.909643138662148, 17.019752011138507, 23.650513971158716]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.386109317508498, -4.051887375891005, -4.181290225557445, -4.121369180516264]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.702107562494973, -5.360559334401216, -5.317030284237433, -4.735834132595812]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9782962392598529, -1.8087535990828059, -1.7853460248318014, -1.6691202993554815]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.9122726345892143, -2.3984202305681075, -2.298717448394566, -1.9634791306727053]}}