{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:26.337879", "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": "2023-Jan-27_to_2023-Jan-31_100.5_6.5"}, "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": 2023010001245}, "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": "January 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2023"}, "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": 52173.457703517204}, "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": ["Malaysia", "Thailand"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia"]}, "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": 6.5}, "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": 100.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "100.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 98.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 102.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[98.75, 7.5], [98.85, 7.75], [98.82, 7.82], [98.75, 7.85], [98.5, 7.75], [97.97, 7.97], [97.75, 8.5], [97.97, 9.03], [98.5, 9.25], [98.75, 9.15], [99.0, 9.25], [99.53, 9.03], [99.68, 8.68], [100.03, 8.53], [100.25, 8.0], [100.15, 7.75], [100.18, 7.68], [100.25, 7.65], [100.5, 7.75], [100.75, 7.65], [101.0, 7.75], [101.53, 7.53], [101.68, 7.18], [102.03, 7.03], [102.18, 6.68], [102.53, 6.53], [102.75, 6.0], [102.53, 5.47], [102.0, 5.25], [101.7, 5.37], [101.53, 4.97], [101.0, 4.75], [100.47, 4.97], [100.32, 5.32], [100.25, 5.35], [100.0, 5.25], [99.47, 5.47], [99.32, 5.82], [98.97, 5.97], [98.75, 6.5], [98.96, 7.0], [98.75, 7.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.0, 5.75], [99.47, 5.97], [99.25, 6.5], [99.47, 7.03], [100.0, 7.25], [100.25, 7.15], [100.32, 7.18], [100.47, 7.53], [101.0, 7.75], [101.53, 7.53], [101.75, 7.0], [101.53, 6.47], [101.18, 6.32], [101.03, 5.97], [100.5, 5.75], [100.25, 5.85], [100.0, 5.75]]]]}, "2023-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.5, 7.75], [97.97, 7.97], [97.75, 8.5], [97.97, 9.03], [98.5, 9.25], [98.75, 9.15], [99.0, 9.25], [99.53, 9.03], [99.68, 8.68], [100.03, 8.53], [100.25, 8.0], [100.15, 7.75], [100.18, 7.68], [100.25, 7.65], [100.5, 7.75], [100.75, 7.65], [101.0, 7.75], [101.53, 7.53], [101.68, 7.18], [102.03, 7.03], [102.18, 6.68], [102.53, 6.53], [102.75, 6.0], [102.53, 5.47], [102.0, 5.25], [101.5, 5.46], [101.0, 5.25], [100.75, 5.35], [100.5, 5.25], [100.25, 5.35], [100.0, 5.25], [99.47, 5.47], [99.32, 5.82], [98.97, 5.97], [98.75, 6.5], [98.96, 7.0], [98.75, 7.5], [98.85, 7.75], [98.82, 7.82], [98.75, 7.85], [98.5, 7.75]]]]}, "2023-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.5, 7.75], [97.97, 7.97], [97.75, 8.5], [97.97, 9.03], [98.5, 9.25], [98.75, 9.15], [99.0, 9.25], [99.53, 9.03], [99.68, 8.68], [100.03, 8.53], [100.25, 8.0], [100.15, 7.75], [100.18, 7.68], [100.25, 7.65], [100.5, 7.75], [100.75, 7.65], [101.0, 7.75], [101.53, 7.53], [101.68, 7.18], [102.03, 7.03], [102.18, 6.68], [102.53, 6.53], [102.75, 6.0], [102.53, 5.47], [102.0, 5.25], [101.7, 5.37], [101.53, 4.97], [101.0, 4.75], [100.47, 4.97], [100.32, 5.32], [100.25, 5.35], [100.0, 5.25], [99.47, 5.47], [99.32, 5.82], [98.97, 5.97], [98.75, 6.5], [98.96, 7.0], [98.75, 7.5], [98.85, 7.75], [98.82, 7.82], [98.75, 7.85], [98.5, 7.75]]]]}, "2023-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.5, 7.75], [97.97, 7.97], [97.75, 8.5], [97.97, 9.03], [98.5, 9.25], [98.75, 9.15], [99.0, 9.25], [99.53, 9.03], [99.68, 8.68], [100.03, 8.53], [100.25, 8.0], [100.15, 7.75], [100.18, 7.68], [100.25, 7.65], [100.5, 7.75], [100.75, 7.65], [101.0, 7.75], [101.53, 7.53], [101.68, 7.18], [102.03, 7.03], [102.18, 6.68], [102.53, 6.53], [102.75, 6.0], [102.53, 5.47], [102.0, 5.25], [101.7, 5.37], [101.53, 4.97], [101.0, 4.75], [100.47, 4.97], [100.32, 5.32], [100.25, 5.35], [100.0, 5.25], [99.47, 5.47], [99.32, 5.82], [98.97, 5.97], [98.75, 6.5], [98.96, 7.0], [98.75, 7.5], [98.85, 7.75], [98.82, 7.82], [98.75, 7.85], [98.5, 7.75]]]]}, "2023-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.5, 7.75], [97.97, 7.97], [97.75, 8.5], [97.97, 9.03], [98.5, 9.25], [98.75, 9.15], [99.0, 9.25], [99.53, 9.03], [99.68, 8.68], [100.03, 8.53], [100.25, 8.0], [100.15, 7.75], [100.25, 7.5], [100.13, 7.2], [100.25, 7.15], [100.5, 7.25], [100.75, 7.15], [101.0, 7.25], [101.53, 7.03], [101.75, 6.5], [101.65, 6.25], [101.75, 6.0], [101.65, 5.75], [101.75, 5.5], [101.53, 4.97], [101.0, 4.75], [100.47, 4.97], [100.32, 5.32], [99.97, 5.47], [99.82, 5.82], [99.47, 5.97], [99.25, 6.5], [99.38, 6.8], [98.97, 6.97], [98.75, 7.5], [98.85, 7.75], [98.82, 7.82], [98.75, 7.85], [98.5, 7.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.5001022282401095}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4870440409809935}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.106174294911682, 25.206160031072557, 25.157550983032877, 24.776463992406207, 24.998036634973232]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.00258741993639, 23.75239308680176, 22.7304397068429, 22.90058563975026, 23.035739567030248]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9143761141618256, -1.3864630458520928, -1.337307316342403, -1.7445893518435516, -1.6364994146522407]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.0632754751543985, -1.9383982920161316, -2.0412882073960645, -2.5001022282401095, -2.0371768383375866]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2480514204266875, -1.7737422317345994, -1.600015904265339, -2.025518717868571, -1.6416824414483127]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2680440507811812, -2.727347583819589, -2.1783176853212463, -2.7740786270222375, -1.9026572733448943]}}