{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:22:18.608482", "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": "2021-Feb-19_to_2021-Feb-21_80.0_11.0"}, "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": 2021020000709}, "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": "February 19 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 21 2021"}, "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": "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": 66879.0921134489}, "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": ["Sri Lanka"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 11.0}, "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": 80.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "80.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 79.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 82.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[78.97, 10.53], [79.323, 10.677], [79.354, 10.75], [79.25, 11.0], [79.354, 11.25], [79.25, 11.5], [79.354, 11.75], [79.25, 12.0], [79.47, 12.53], [80.0, 12.75], [80.53, 12.53], [80.677, 12.177], [81.03, 12.03], [81.177, 11.677], [81.25, 11.646], [81.5, 11.75], [82.03, 11.53], [82.177, 11.177], [82.53, 11.03], [82.75, 10.5], [82.646, 10.25], [82.75, 10.0], [82.53, 9.47], [82.177, 9.323], [82.146, 9.25], [82.25, 9.0], [82.03, 8.47], [81.5, 8.25], [80.97, 8.47], [80.823, 8.823], [80.47, 8.97], [80.323, 9.323], [80.25, 9.354], [80.177, 9.323], [80.03, 8.97], [79.5, 8.75], [78.97, 8.97], [78.75, 9.5], [78.854, 9.75], [78.75, 10.0], [78.97, 10.53]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia", "Bay-of-Bengal"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[78.85355339059328, 9.75], [78.75, 10.0], [78.96966991411009, 10.530330085889911], [79.32322330470336, 10.676776695296637], [79.35355339059328, 10.75], [79.25, 11.0], [79.35355339059328, 11.25], [79.25, 11.5], [79.35355339059328, 11.75], [79.25, 12.0], [79.46966991411009, 12.530330085889911], [80.0, 12.75], [80.53033008588991, 12.530330085889911], [80.67677669529664, 12.176776695296637], [81.03033008588991, 12.030330085889911], [81.17677669529664, 11.676776695296637], [81.25, 11.646446609406727], [81.5, 11.75], [82.03033008588991, 11.530330085889911], [82.17677669529664, 11.176776695296637], [82.53033008588991, 11.030330085889911], [82.75, 10.5], [82.64644660940672, 10.25], [82.75, 10.0], [82.53033008588991, 9.469669914110089], [82.17677669529664, 9.323223304703363], [82.14644660940672, 9.25], [82.25, 9.0], [82.03033008588991, 8.469669914110089], [81.5, 8.25], [80.96966991411009, 8.469669914110089], [80.82322330470336, 8.823223304703363], [80.46966991411009, 8.969669914110089], [80.32322330470336, 9.323223304703363], [80.25, 9.353553390593273], [80.17677669529664, 9.323223304703363], [80.03033008588991, 8.969669914110089], [79.5, 8.75], [78.96966991411009, 8.969669914110089], [78.75, 9.5], [78.85355339059328, 9.75]]]}, "2021-02-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[78.85355339059328, 9.75], [78.75, 10.0], [78.96966991411009, 10.530330085889911], [79.32322330470336, 10.676776695296637], [79.35355339059328, 10.75], [79.25, 11.0], [79.35355339059328, 11.25], [79.25, 11.5], [79.35355339059328, 11.75], [79.25, 12.0], [79.46966991411009, 12.530330085889911], [80.0, 12.75], [80.53033008588991, 12.530330085889911], [80.67677669529664, 12.176776695296637], [81.03033008588991, 12.030330085889911], [81.17677669529664, 11.676776695296637], [81.25, 11.646446609406727], [81.5, 11.75], [82.03033008588991, 11.530330085889911], [82.17677669529664, 11.176776695296637], [82.53033008588991, 11.030330085889911], [82.75, 10.5], [82.64644660940672, 10.25], [82.75, 10.0], [82.53033008588991, 9.469669914110089], [82.17677669529664, 9.323223304703363], [82.14644660940672, 9.25], [82.25, 9.0], [82.03033008588991, 8.469669914110089], [81.5, 8.25], [80.96966991411009, 8.469669914110089], [80.82322330470336, 8.823223304703363], [80.46966991411009, 8.969669914110089], [80.32322330470336, 9.323223304703363], [80.25, 9.353553390593273], [80.17677669529664, 9.323223304703363], [80.03033008588991, 8.969669914110089], [79.5, 8.75], [78.96966991411009, 8.969669914110089], [78.75, 9.5], [78.85355339059328, 9.75]]]}, "2021-02-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[78.85355339059328, 9.75], [78.75, 10.0], [78.96966991411009, 10.530330085889911], [79.32322330470336, 10.676776695296637], [79.35355339059328, 10.75], [79.25, 11.0], [79.35355339059328, 11.25], [79.25, 11.5], [79.35355339059328, 11.75], [79.25, 12.0], [79.46966991411009, 12.530330085889911], [80.0, 12.75], [80.53033008588991, 12.530330085889911], [80.67677669529664, 12.176776695296637], [81.03033008588991, 12.030330085889911], [81.17677669529664, 11.676776695296637], [81.25, 11.646446609406727], [81.5, 11.75], [82.03033008588991, 11.530330085889911], [82.17677669529664, 11.176776695296637], [82.53033008588991, 11.030330085889911], [82.75, 10.5], [82.64644660940672, 10.25], [82.75, 10.0], [82.53033008588991, 9.469669914110089], [82.17677669529664, 9.323223304703363], [82.14644660940672, 9.25], [82.25, 9.0], [82.03033008588991, 8.469669914110089], [81.5, 8.25], [80.96966991411009, 8.469669914110089], [80.82322330470336, 8.823223304703363], [80.46966991411009, 8.969669914110089], [80.32322330470336, 9.323223304703363], [80.25, 9.353553390593273], [80.17677669529664, 9.323223304703363], [80.03033008588991, 8.969669914110089], [79.5, 8.75], [78.96966991411009, 8.969669914110089], [78.75, 9.5], [78.85355339059328, 9.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.527038478708448}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1634070990791165}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.275181939263177, 25.18508846821669, 25.311648559818423]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.876092644495202, 24.627131968213632, 24.762536294417487]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1259187414545098, -1.234860164249462, -1.1294423915333776]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.385768626332947, -1.4849819570559362, -1.527038478708448]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9581066419925242, -2.195036831867446, -2.0458653747492277]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4053540012205863, -2.5900682041228693, -2.75137623088332]}}