{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:18:53.015635", "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": "2020-Oct-30_to_2020-Nov-03_49.0_-15.0"}, "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": 2020100000885}, "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": "October 30 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 03 2020"}, "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": 50403.624218645404}, "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": ["Madagascar"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": ["Indian Ocean"]}, "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": -15.0}, "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": 49.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "49.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 48.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 50.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[47.97, -17.97], [48.323, -17.823], [48.354, -17.75], [48.354, -17.749], [48.25, -17.5], [48.354, -17.251], [48.354, -17.25], [48.25, -17.0], [48.354, -16.75], [48.25, -16.5], [48.354, -16.25], [48.25, -16.0], [48.354, -15.75], [48.323, -15.677], [47.97, -15.53], [47.75, -15.0], [47.97, -14.47], [48.323, -14.323], [48.47, -13.97], [49.0, -13.75], [49.25, -13.854], [49.5, -13.75], [50.03, -13.97], [50.177, -14.323], [50.53, -14.47], [50.75, -15.0], [50.53, -15.53], [50.177, -15.677], [50.156, -15.726], [50.146, -15.75], [50.25, -16.0], [50.03, -16.53], [49.677, -16.677], [49.656, -16.726], [49.646, -16.75], [49.75, -17.0], [49.646, -17.25], [49.646, -17.251], [49.75, -17.5], [49.646, -17.749], [49.646, -17.75], [49.75, -18.0], [49.53, -18.53], [49.177, -18.677], [49.146, -18.75], [49.25, -19.0], [49.146, -19.25], [49.25, -19.5], [49.03, -20.03], [48.5, -20.25], [47.97, -20.03], [47.75, -19.5], [47.854, -19.25], [47.75, -19.0], [47.854, -18.75], [47.75, -18.5], [47.97, -17.97]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.75, -19.0], [47.85355339059328, -18.75], [47.75, -18.5], [47.96966991411009, -17.96966991411009], [48.32322330470336, -17.82322330470336], [48.45710678118655, -17.5], [48.25, -17.0], [48.46966991411009, -16.46966991411009], [49.0, -16.25], [49.53033008588991, -16.46966991411009], [49.75, -17.0], [49.54289321881345, -17.5], [49.75, -18.0], [49.53033008588991, -18.53033008588991], [49.17677669529664, -18.67677669529664], [49.14644660940672, -18.75], [49.25, -19.0], [49.14644660940672, -19.25], [49.25, -19.5], [49.03033008588991, -20.03033008588991], [48.5, -20.25], [47.96966991411009, -20.03033008588991], [47.75, -19.5], [47.85355339059328, -19.25], [47.75, -19.0]]], [[[48.46966991411009, -13.969669914110089], [49.0, -13.75], [49.25, -13.853553390593275], [49.5, -13.75], [50.03033008588991, -13.969669914110089], [50.25, -14.5], [50.03033008588991, -15.030330085889911], [49.67677669529664, -15.176776695296637], [49.53033008588991, -15.530330085889911], [49.0, -15.75], [48.75, -15.646446609406725], [48.5, -15.75], [47.96966991411009, -15.530330085889911], [47.75, -15.0], [47.96966991411009, -14.469669914110089], [48.32322330470336, -14.323223304703363], [48.46966991411009, -13.969669914110089]]]]}, "2020-10-31T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[47.85355339059328, -19.25], [47.75, -19.0], [47.85355339059328, -18.75], [47.75, -18.5], [47.96966991411009, -17.96966991411009], [48.32322330470336, -17.82322330470336], [48.35355339059328, -17.75], [48.25, -17.5], [48.35355339059328, -17.25], [48.25, -17.0], [48.35355339059328, -16.75], [48.25, -16.5], [48.35355339059328, -16.25], [48.25, -16.0], [48.35355339059328, -15.75], [48.32322330470336, -15.676776695296637], [47.96966991411009, -15.530330085889911], [47.75, -15.0], [47.96966991411009, -14.469669914110089], [48.32322330470336, -14.323223304703363], [48.46966991411009, -13.969669914110089], [49.0, -13.75], [49.25, -13.853553390593275], [49.5, -13.75], [50.03033008588991, -13.969669914110089], [50.17677669529664, -14.323223304703363], [50.53033008588991, -14.469669914110089], [50.75, -15.0], [50.53033008588991, -15.530330085889911], [50.17677669529664, -15.676776695296637], [50.14644660940672, -15.75], [50.25, -16.0], [50.03033008588991, -16.53033008588991], [49.67677669529664, -16.67677669529664], [49.64644660940672, -16.75], [49.75, -17.0], [49.64644660940672, -17.25], [49.75, -17.5], [49.64644660940672, -17.75], [49.75, -18.0], [49.53033008588991, -18.53033008588991], [49.17677669529664, -18.67677669529664], [49.14644660940672, -18.75], [49.25, -19.0], [49.14644660940672, -19.25], [49.25, -19.5], [49.03033008588991, -20.03033008588991], [48.5, -20.25], [47.96966991411009, -20.03033008588991], [47.75, -19.5], [47.85355339059328, -19.25]]]}, "2020-11-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[47.85355339059328, -19.25], [47.75, -19.0], [47.85355339059328, -18.75], [47.75, -18.5], [47.96966991411009, -17.96966991411009], [48.32322330470336, -17.82322330470336], [48.35355339059328, -17.75], [48.25, -17.5], [48.35355339059328, -17.25], [48.25, -17.0], [48.35355339059328, -16.75], [48.25, -16.5], [48.35355339059328, -16.25], [48.25, -16.0], [48.35355339059328, -15.75], [48.32322330470336, -15.676776695296637], [47.96966991411009, -15.530330085889911], [47.75, -15.0], [47.96966991411009, -14.469669914110089], [48.32322330470336, -14.323223304703363], [48.46966991411009, -13.969669914110089], [49.0, -13.75], [49.25, -13.853553390593275], [49.5, -13.75], [50.03033008588991, -13.969669914110089], [50.17677669529664, -14.323223304703363], [50.53033008588991, -14.469669914110089], [50.75, -15.0], [50.53033008588991, -15.530330085889911], [50.17677669529664, -15.676776695296637], [50.14644660940672, -15.75], [50.25, -16.0], [50.03033008588991, -16.53033008588991], [49.67677669529664, -16.67677669529664], [49.64644660940672, -16.75], [49.75, -17.0], [49.64644660940672, -17.25], [49.75, -17.5], [49.64644660940672, -17.75], [49.75, -18.0], [49.53033008588991, -18.53033008588991], [49.17677669529664, -18.67677669529664], [49.14644660940672, -18.75], [49.25, -19.0], [49.14644660940672, -19.25], [49.25, -19.5], [49.03033008588991, -20.03033008588991], [48.5, -20.25], [47.96966991411009, -20.03033008588991], [47.75, -19.5], [47.85355339059328, -19.25]]]}, "2020-11-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[48.35355339059328, -17.75], [48.25, -17.5], [48.35355339059328, -17.25], [48.25, -17.0], [48.35355339059328, -16.75], [48.25, -16.5], [48.35355339059328, -16.25], [48.25, -16.0], [48.35355339059328, -15.75], [48.25, -15.5], [48.35355339059328, -15.25], [48.25, -15.0], [48.46966991411009, -14.469669914110089], [48.82322330470336, -14.323223304703363], [48.96966991411009, -13.969669914110089], [49.5, -13.75], [50.03033008588991, -13.969669914110089], [50.17677669529664, -14.323223304703363], [50.53033008588991, -14.469669914110089], [50.75, -15.0], [50.53033008588991, -15.530330085889911], [50.17677669529664, -15.676776695296637], [50.14644660940672, -15.75], [50.25, -16.0], [50.03033008588991, -16.53033008588991], [49.67677669529664, -16.67677669529664], [49.64644660940672, -16.75], [49.75, -17.0], [49.64644660940672, -17.25], [49.75, -17.5], [49.64644660940672, -17.75], [49.75, -18.0], [49.53033008588991, -18.53033008588991], [49.0, -18.75], [48.46966991411009, -18.53033008588991], [48.25, -18.0], [48.35355339059328, -17.75]]]}, "2020-11-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[48.35355339059328, -16.25], [48.25, -16.0], [48.35355339059328, -15.75], [48.25, -15.5], [48.35355339059328, -15.25], [48.25, -15.0], [48.46966991411009, -14.469669914110089], [49.0, -14.25], [49.53033008588991, -14.469669914110089], [49.67677669529664, -14.823223304703363], [50.03033008588991, -14.969669914110089], [50.25, -15.5], [50.03033008588991, -16.03033008588991], [49.67677669529664, -16.17677669529664], [49.64644660940672, -16.25], [49.75, -16.5], [49.53033008588991, -17.03033008588991], [49.0, -17.25], [48.46966991411009, -17.03033008588991], [48.25, -16.5], [48.35355339059328, -16.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.700006990006898}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.544349566953082}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.33839053276523, 17.848567358580453, 18.142661584585312, 18.478245352747194, 19.13877754362977]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.21006050883483, 15.426381287810443, 15.544493544236389, 16.366171676606825, 17.52558116045617]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.3279508548275833, -2.9369078394599977, -2.645637434860081, -2.188335681888683, -2.109223695526225]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.980827288340379, -3.700006990006898, -3.6598690285551356, -2.7057400478765885, -2.2936053501603055]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5374119807513127, -2.0196041861064153, -1.83274644915523, -1.5300735964801762, -1.4061894179464982]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.946828996254718, -2.478502439748015, -2.315378396350872, -1.774518671024782, -1.4947937558336821]}}