{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:43.431866", "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": "2022-Mar-22_to_2022-Mar-25_254.5_27.5"}, "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": 2022030000774}, "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 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 25 2022"}, "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": 221546.0849059393}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 27.5}, "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": 254.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "254.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 252.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 260.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-104.25, 27.15], [-104.0, 27.25], [-103.75, 27.15], [-103.5, 27.25], [-102.97, 27.03], [-102.75, 26.5], [-102.85, 26.25], [-102.82, 26.18], [-102.75, 26.15], [-102.5, 26.25], [-101.97, 26.03], [-101.82, 25.68], [-101.75, 25.65], [-101.5, 25.75], [-101.25, 25.65], [-101.0, 25.75], [-100.75, 25.65], [-100.5, 25.75], [-99.97, 25.53], [-99.82, 25.18], [-99.47, 25.03], [-99.25, 24.5], [-99.47, 23.97], [-100.0, 23.75], [-100.53, 23.97], [-100.68, 24.32], [-100.75, 24.35], [-101.0, 24.25], [-101.25, 24.35], [-101.5, 24.25], [-101.75, 24.35], [-101.82, 24.32], [-101.97, 23.97], [-102.5, 23.75], [-102.75, 23.85], [-103.0, 23.75], [-103.53, 23.97], [-103.68, 24.32], [-103.75, 24.35], [-104.0, 24.25], [-104.53, 24.47], [-104.68, 24.82], [-104.75, 24.85], [-105.0, 24.75], [-105.53, 24.97], [-105.68, 25.32], [-106.03, 25.47], [-106.18, 25.82], [-106.25, 25.85], [-106.5, 25.75], [-107.03, 25.97], [-107.18, 26.32], [-107.53, 26.47], [-107.75, 27.0], [-107.65, 27.25], [-107.68, 27.32], [-108.03, 27.47], [-108.25, 28.0], [-108.15, 28.25], [-108.18, 28.32], [-108.53, 28.47], [-108.75, 29.0], [-108.53, 29.53], [-108.18, 29.68], [-108.15, 29.75], [-108.25, 30.0], [-108.03, 30.53], [-107.5, 30.75], [-107.25, 30.65], [-107.18, 30.68], [-107.15, 30.75], [-107.25, 31.0], [-107.03, 31.53], [-106.5, 31.75], [-105.97, 31.53], [-105.82, 31.18], [-105.75, 31.15], [-105.5, 31.25], [-105.25, 31.15], [-105.0, 31.25], [-104.75, 31.15], [-104.5, 31.25], [-103.97, 31.03], [-103.82, 30.68], [-103.47, 30.53], [-103.25, 30.0], [-103.47, 29.47], [-103.82, 29.32], [-103.85, 29.25], [-103.75, 29.0], [-103.85, 28.75], [-103.75, 28.5], [-103.85, 28.25], [-103.75, 28.0], [-103.97, 27.47], [-104.37, 27.3], [-104.32, 27.18], [-104.25, 27.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.53, 28.47], [-108.75, 29.0], [-108.53, 29.53], 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5.599072306562505, 6.957544147554586, 10.392944351530161]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.322297131948051, -6.500931862990588, -6.190296154230694, -4.510942973703863]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.574084314130971, -9.815743337980791, -8.087363981683438, -5.663582715845166]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7377209926610535, -2.1714704892334566, -2.2071238346850106, -1.6875611455390724]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.311195192283336, -2.9347040382059184, -2.9632834959483145, 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