{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:30.181030", "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": "2025-Jul-01_to_2025-Jul-03_252.5_50.5"}, "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": 2025070001410}, "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 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 03 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 120143.79662178722}, "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", "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": 50.5}, "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": 252.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "252.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 246.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 254.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-114.18, 50.68], [-114.03, 51.03], [-113.5, 51.25], [-113.25, 51.15], [-113.18, 51.18], [-113.03, 51.53], [-112.5, 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[-111.25, 47.0], [-111.47, 46.47], [-112.0, 46.25], [-112.25, 46.35], [-112.5, 46.25], [-113.03, 46.47], [-113.25, 47.0], [-113.15, 47.25], [-113.18, 47.32], [-113.25, 47.35], [-113.5, 47.25], [-113.75, 47.35], [-114.0, 47.25], [-114.53, 47.47], [-114.75, 48.0], [-114.53, 48.53], [-114.18, 48.68], [-114.15, 48.75], [-114.18, 48.82], [-114.53, 48.97], [-114.75, 49.5], [-114.65, 49.75], [-114.75, 50.0], [-114.53, 50.53], [-114.18, 50.68]], [[-112.18, 49.18], [-112.15, 49.25], [-112.25, 49.5], [-112.15, 49.75], [-112.18, 49.82], [-112.25, 49.85], [-112.5, 49.75], [-112.75, 49.85], [-112.82, 49.82], [-112.96, 49.5], [-112.82, 49.18], [-112.75, 49.15], [-112.5, 49.25], [-112.25, 49.15], [-112.18, 49.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "N.E.North-America", "W.North-America", "C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-114.75, 50.0], [-114.53, 50.53], [-114.18, 50.68], [-114.03, 51.03], [-113.5, 51.25], [-113.25, 51.15], [-113.18, 51.18], [-113.03, 51.53], [-112.5, 51.75], [-112.0, 51.54], [-111.5, 51.75], [-111.25, 51.65], [-111.0, 51.75], [-110.75, 51.65], [-110.5, 51.75], [-110.25, 51.65], [-110.0, 51.75], [-109.47, 51.53], [-109.32, 51.18], [-109.25, 51.15], [-109.0, 51.25], [-108.75, 51.15], [-108.5, 51.25], [-108.25, 51.15], [-108.0, 51.25], [-107.75, 51.15], [-107.5, 51.25], [-107.25, 51.15], [-107.0, 51.25], [-106.47, 51.03], [-106.32, 50.68], [-106.25, 50.65], [-106.0, 50.75], [-105.47, 50.53], [-105.32, 50.18], [-104.97, 50.03], [-104.75, 49.5], [-104.97, 48.97], [-105.5, 48.75], [-105.75, 48.85], [-106.0, 48.75], [-106.53, 48.97], [-106.68, 49.32], [-106.75, 49.35], [-106.82, 49.32], [-106.97, 48.97], [-107.5, 48.75], [-107.80000000000001, 48.88], [-107.97, 48.47], [-108.5, 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anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.663653168854189}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.552858903672927, 23.248032972547833, 23.595439826117627]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.640246327718103, 26.330412801106775, 26.445848083496116]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.49638975032293, 6.098324950483112, 6.396244805756528]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.988297705839614, 7.468782139238215, 8.6235824838094]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3832374994115275, 1.8784008320602685, 1.9560657438652254]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.647153413560411, 2.170164184615349, 2.823779981522384]}}