{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:21:49.170021", "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-Jan-18_to_2021-Jan-22_100.0_13.5"}, "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": 2021010000722}, "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 18 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 22 2021"}, "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": 368450.2142184456}, "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": ["Cambodia", "Myanmar", "Thailand"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 13.5}, "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": 100.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "100.0\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": 105.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[100.0, 10.25], [99.75, 10.354], [99.5, 10.25], [98.97, 10.47], [98.75, 11.0], [98.97, 11.53], [99.323, 11.677], [99.354, 11.75], [99.323, 11.823], [99.25, 11.854], [99.0, 11.75], [98.47, 11.97], [98.25, 12.5], [98.354, 12.75], [98.323, 12.823], [97.97, 12.97], [97.75, 13.5], [97.957, 14.0], [97.75, 14.5], [97.854, 14.75], [97.75, 15.0], [97.97, 15.53], [98.5, 15.75], [98.75, 15.646], [98.751, 15.646], [98.823, 15.677], [98.854, 15.75], [98.75, 16.0], [98.854, 16.25], [98.75, 16.5], [98.854, 16.75], [98.75, 17.0], [98.854, 17.25], [98.75, 17.5], [98.97, 18.03], [99.5, 18.25], [99.75, 18.146], [100.0, 18.25], [100.25, 18.146], [100.5, 18.25], [101.0, 18.043], [101.5, 18.25], [102.03, 18.03], [102.177, 17.677], [102.53, 17.53], [102.677, 17.177], [102.75, 17.146], [103.0, 17.25], [103.25, 17.146], [103.5, 17.25], [104.03, 17.03], [104.25, 16.5], [104.03, 15.97], [103.677, 15.823], [103.646, 15.75], [103.677, 15.677], [104.03, 15.53], [104.177, 15.177], [104.25, 15.146], [104.323, 15.177], [104.47, 15.53], [105.0, 15.75], [105.53, 15.53], [105.75, 15.0], [105.646, 14.75], [105.75, 14.5], [105.646, 14.25], [105.75, 14.0], [105.646, 13.75], [105.75, 13.5], [105.646, 13.25], [105.75, 13.0], [105.53, 12.47], [105.177, 12.323], [105.146, 12.25], [105.25, 12.0], [105.03, 11.47], [104.677, 11.323], [104.646, 11.25], [104.75, 11.0], [104.53, 10.47], [104.0, 10.25], [103.47, 10.47], [103.323, 10.823], [102.97, 10.97], [102.823, 11.323], [102.75, 11.354], [102.5, 11.25], [102.0, 11.457], [101.677, 11.323], [101.53, 10.97], [101.0, 10.75], [100.751, 10.854], [100.75, 10.854], [100.677, 10.823], [100.53, 10.47], [100.0, 10.25]]]}}, "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": {"2021-01-18T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[97.85355339059328, 14.75], [97.75, 15.0], [97.96966991411009, 15.530330085889911], [98.5, 15.75], [98.75, 15.646446609406727], [99.0, 15.75], [99.25, 15.646446609406727], [99.5, 15.75], [99.75, 15.646446609406727], [99.82322330470336, 15.676776695296637], [99.96966991411009, 16.03033008588991], [100.32322330470336, 16.17677669529664], [100.35355339059328, 16.25], [100.25, 16.5], [100.46966991411009, 17.03033008588991], [100.82322330470336, 17.17677669529664], [100.85355339059328, 17.25], [100.75, 17.5], [100.96966991411009, 18.03033008588991], [101.5, 18.25], [102.03033008588991, 18.03033008588991], [102.17677669529664, 17.67677669529664], [102.53033008588991, 17.53033008588991], [102.67677669529664, 17.17677669529664], [102.75, 17.146446609406727], [103.0, 17.25], [103.25, 17.146446609406727], [103.5, 17.25], [104.03033008588991, 17.03033008588991], [104.25, 16.5], [104.03033008588991, 15.969669914110089], [103.67677669529664, 15.823223304703363], [103.64644660940672, 15.75], [103.67677669529664, 15.676776695296637], [104.03033008588991, 15.530330085889911], [104.17677669529664, 15.176776695296637], [104.25, 15.146446609406727], [104.32322330470336, 15.176776695296637], [104.46966991411009, 15.530330085889911], [105.0, 15.75], [105.53033008588991, 15.530330085889911], [105.75, 15.0], [105.64644660940672, 14.75], [105.75, 14.5], [105.64644660940672, 14.25], [105.75, 14.0], [105.64644660940672, 13.75], [105.75, 13.5], [105.64644660940672, 13.25], [105.75, 13.0], [105.53033008588991, 12.469669914110089], [105.17677669529664, 12.323223304703363], [105.14644660940672, 12.25], [105.25, 12.0], [105.03033008588991, 11.469669914110089], [104.67677669529664, 11.323223304703363], [104.64644660940672, 11.25], [104.75, 11.0], [104.53033008588991, 10.469669914110089], [104.0, 10.25], [103.46966991411009, 10.469669914110089], [103.32322330470336, 10.823223304703363], [102.96966991411009, 10.969669914110089], [102.82322330470336, 11.323223304703363], [102.75, 11.353553390593273], [102.5, 11.25], [102.0, 11.457106781186544], [101.67677669529664, 11.323223304703363], [101.53033008588991, 10.969669914110089], [101.0, 10.75], [100.75, 10.853553390593273], [100.5, 10.75], [100.25, 10.853553390593273], [100.0, 10.75], [99.46966991411009, 10.969669914110089], [99.25, 11.5], [99.35355339059328, 11.75], [99.32322330470336, 11.823223304703363], [99.25, 11.853553390593273], [99.0, 11.75], [98.46966991411009, 11.969669914110089], [98.25, 12.5], [98.46966991411009, 13.030330085889911], [98.82322330470336, 13.176776695296637], [98.85355339059328, 13.25], [98.82322330470336, 13.323223304703363], [98.46966991411009, 13.469669914110089], [98.32322330470336, 13.823223304703363], [97.96966991411009, 13.969669914110089], [97.75, 14.5], [97.85355339059328, 14.75]]]}, "2021-01-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[97.85355339059328, 14.75], [97.75, 15.0], [97.96966991411009, 15.530330085889911], [98.5, 15.75], [98.75, 15.646446609406727], [98.82322330470336, 15.676776695296637], [98.85355339059328, 15.75], [98.75, 16.0], [98.85355339059328, 16.25], [98.75, 16.5], [98.85355339059328, 16.75], [98.75, 17.0], [98.85355339059328, 17.25], [98.75, 17.5], [98.96966991411009, 18.03033008588991], [99.5, 18.25], [99.75, 18.146446609406727], [100.0, 18.25], [100.25, 18.146446609406727], [100.5, 18.25], [101.0, 18.042893218813454], [101.5, 18.25], [102.03033008588991, 18.03033008588991], [102.17677669529664, 17.67677669529664], [102.53033008588991, 17.53033008588991], [102.67677669529664, 17.17677669529664], [102.75, 17.146446609406727], [103.0, 17.25], [103.25, 17.146446609406727], [103.5, 17.25], [104.03033008588991, 17.03033008588991], [104.25, 16.5], [104.03033008588991, 15.969669914110089], [103.67677669529664, 15.823223304703363], [103.64644660940672, 15.75], [103.67677669529664, 15.676776695296637], [104.03033008588991, 15.530330085889911], [104.17677669529664, 15.176776695296637], [104.25, 15.146446609406727], [104.32322330470336, 15.176776695296637], [104.46966991411009, 15.530330085889911], [105.0, 15.75], [105.53033008588991, 15.530330085889911], [105.75, 15.0], [105.64644660940672, 14.75], [105.75, 14.5], [105.64644660940672, 14.25], [105.75, 14.0], [105.64644660940672, 13.75], [105.75, 13.5], [105.64644660940672, 13.25], [105.75, 13.0], [105.53033008588991, 12.469669914110089], [105.17677669529664, 12.323223304703363], [105.14644660940672, 12.25], [105.25, 12.0], [105.03033008588991, 11.469669914110089], [104.67677669529664, 11.323223304703363], [104.64644660940672, 11.25], [104.75, 11.0], [104.53033008588991, 10.469669914110089], [104.0, 10.25], [103.46966991411009, 10.469669914110089], [103.32322330470336, 10.823223304703363], [102.96966991411009, 10.969669914110089], [102.82322330470336, 11.323223304703363], [102.75, 11.353553390593273], [102.5, 11.25], [102.0, 11.457106781186544], [101.67677669529664, 11.323223304703363], [101.53033008588991, 10.969669914110089], [101.0, 10.75], [100.75, 10.853553390593273], [100.67677669529664, 10.823223304703363], [100.53033008588991, 10.469669914110089], [100.0, 10.25], [99.75, 10.353553390593273], [99.5, 10.25], [98.96966991411009, 10.469669914110089], [98.75, 11.0], [98.96966991411009, 11.530330085889911], [99.32322330470336, 11.676776695296637], [99.35355339059328, 11.75], [99.32322330470336, 11.823223304703363], [99.25, 11.853553390593273], [99.0, 11.75], [98.46966991411009, 11.969669914110089], [98.25, 12.5], [98.35355339059328, 12.75], [98.32322330470336, 12.823223304703363], [97.96966991411009, 12.969669914110089], [97.75, 13.5], [97.95710678118654, 14.0], [97.75, 14.5], [97.85355339059328, 14.75]]]}, "2021-01-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[97.85355339059328, 14.75], [97.75, 15.0], [97.96966991411009, 15.530330085889911], [98.5, 15.75], [98.75, 15.646446609406727], [98.82322330470336, 15.676776695296637], [98.85355339059328, 15.75], [98.75, 16.0], [98.85355339059328, 16.25], [98.75, 16.5], [98.85355339059328, 16.75], [98.75, 17.0], [98.85355339059328, 17.25], [98.75, 17.5], [98.96966991411009, 18.03033008588991], [99.5, 18.25], [99.75, 18.146446609406727], [100.0, 18.25], [100.25, 18.146446609406727], [100.5, 18.25], [101.0, 18.042893218813454], [101.5, 18.25], [102.03033008588991, 18.03033008588991], [102.17677669529664, 17.67677669529664], [102.53033008588991, 17.53033008588991], [102.67677669529664, 17.17677669529664], [102.75, 17.146446609406727], [103.0, 17.25], [103.25, 17.146446609406727], [103.5, 17.25], [104.03033008588991, 17.03033008588991], [104.25, 16.5], [104.03033008588991, 15.969669914110089], [103.67677669529664, 15.823223304703363], [103.64644660940672, 15.75], [103.67677669529664, 15.676776695296637], [104.03033008588991, 15.530330085889911], [104.17677669529664, 15.176776695296637], [104.25, 15.146446609406727], [104.32322330470336, 15.176776695296637], [104.46966991411009, 15.530330085889911], [105.0, 15.75], [105.53033008588991, 15.530330085889911], [105.75, 15.0], [105.64644660940672, 14.75], [105.75, 14.5], [105.64644660940672, 14.25], [105.75, 14.0], [105.64644660940672, 13.75], [105.75, 13.5], [105.64644660940672, 13.25], [105.75, 13.0], [105.53033008588991, 12.469669914110089], [105.17677669529664, 12.323223304703363], [105.14644660940672, 12.25], [105.25, 12.0], [105.03033008588991, 11.469669914110089], [104.67677669529664, 11.323223304703363], [104.64644660940672, 11.25], [104.75, 11.0], [104.53033008588991, 10.469669914110089], [104.0, 10.25], [103.46966991411009, 10.469669914110089], [103.32322330470336, 10.823223304703363], [102.96966991411009, 10.969669914110089], [102.82322330470336, 11.323223304703363], [102.75, 11.353553390593273], [102.5, 11.25], [102.0, 11.457106781186544], [101.67677669529664, 11.323223304703363], [101.53033008588991, 10.969669914110089], [101.0, 10.75], [100.75, 10.853553390593273], [100.67677669529664, 10.823223304703363], [100.53033008588991, 10.469669914110089], [100.0, 10.25], [99.75, 10.353553390593273], [99.5, 10.25], [98.96966991411009, 10.469669914110089], [98.75, 11.0], [98.96966991411009, 11.530330085889911], [99.32322330470336, 11.676776695296637], [99.35355339059328, 11.75], [99.32322330470336, 11.823223304703363], [99.25, 11.853553390593273], [99.0, 11.75], [98.46966991411009, 11.969669914110089], [98.25, 12.5], [98.35355339059328, 12.75], [98.32322330470336, 12.823223304703363], [97.96966991411009, 12.969669914110089], [97.75, 13.5], [97.95710678118654, 14.0], [97.75, 14.5], [97.85355339059328, 14.75]]]}, "2021-01-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[98.32322330470336, 12.823223304703363], [97.96966991411009, 12.969669914110089], [97.75, 13.5], [97.96966991411009, 14.030330085889911], [98.32322330470336, 14.176776695296637], [98.375, 14.301776695296637], [97.96966991411009, 14.469669914110089], [97.75, 15.0], [97.96966991411009, 15.530330085889911], [98.5, 15.75], [98.80177669529664, 15.625000000000002], [98.85355339059328, 15.75], [98.75, 16.0], [98.85355339059328, 16.25], [98.75, 16.5], [98.85355339059328, 16.75], [98.75, 17.0], [98.85355339059328, 17.25], [98.75, 17.5], [98.96966991411009, 18.03033008588991], [99.5, 18.25], [99.75, 18.146446609406727], [100.0, 18.25], [100.25, 18.146446609406727], [100.5, 18.25], [101.03033008588991, 18.03033008588991], [101.25, 17.5], [101.14644660940672, 17.25], [101.25, 17.0], [101.14644660940672, 16.75], [101.25, 16.5], [101.14644660940672, 16.25], [101.19822330470336, 16.125], [101.5, 16.25], [102.03033008588991, 16.03033008588991], [102.25, 15.5], [102.14644660940672, 15.25], [102.25, 15.0], [102.03033008588991, 14.469669914110089], [101.625, 14.301776695296637], [101.75, 14.0], [101.64644660940672, 13.75], [101.67677669529664, 13.676776695296637], [102.03033008588991, 13.530330085889911], [102.17677669529664, 13.176776695296637], [102.53033008588991, 13.030330085889911], [102.75, 12.5], [102.53033008588991, 11.969669914110089], [102.0, 11.75], [101.75, 11.853553390593273], [101.5, 11.75], [101.19822330470336, 11.874999999999998], [101.14644660940672, 11.75], [101.25, 11.5], [101.03033008588991, 10.969669914110089], [100.67677669529664, 10.823223304703363], [100.53033008588991, 10.469669914110089], [100.0, 10.25], [99.75, 10.353553390593273], [99.5, 10.25], [98.96966991411009, 10.469669914110089], [98.75, 11.0], [98.96966991411009, 11.530330085889911], [99.32322330470336, 11.676776695296637], [99.35355339059328, 11.75], [99.32322330470336, 11.823223304703363], [99.25, 11.853553390593273], [99.0, 11.75], [98.46966991411009, 11.969669914110089], [98.25, 12.5], [98.35355339059328, 12.75], [98.32322330470336, 12.823223304703363]]]}, "2021-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.53033008588991, 11.530330085889911], [100.75, 11.0], [100.53033008588991, 10.469669914110089], [100.0, 10.25], [99.75, 10.353553390593273], [99.5, 10.25], [98.96966991411009, 10.469669914110089], [98.75, 11.0], [98.96966991411009, 11.530330085889911], [99.5, 11.75], [99.75, 11.646446609406727], [100.0, 11.75], [100.53033008588991, 11.530330085889911]]], [[[98.96966991411009, 13.469669914110089], [98.75, 14.0], [98.96966991411009, 14.530330085889911], [99.375, 14.698223304703363], [99.25, 15.0], [99.45710678118654, 15.5], [99.25, 16.0], [99.35355339059328, 16.25], [99.25, 16.5], [99.46966991411009, 17.03033008588991], [99.82322330470336, 17.17677669529664], [99.96966991411009, 17.53033008588991], [100.5, 17.75], [101.03033008588991, 17.53033008588991], [101.25, 17.0], [101.14644660940672, 16.75], [101.25, 16.5], [101.14644660940672, 16.25], [101.25, 16.0], [101.03033008588991, 15.469669914110089], [100.625, 15.301776695296637], [100.75, 15.0], [100.53033008588991, 14.469669914110089], [100.125, 14.301776695296637], [100.17677669529664, 14.176776695296637], [100.25, 14.146446609406727], [100.5, 14.25], [101.03033008588991, 14.030330085889911], [101.25, 13.5], [101.03033008588991, 12.969669914110089], [100.67677669529664, 12.823223304703363], [100.64644660940672, 12.75], [100.75, 12.5], [100.53033008588991, 11.969669914110089], [100.0, 11.75], [99.46966991411009, 11.969669914110089], [99.25, 12.5], [99.35355339059328, 12.75], [99.25, 13.0], [99.35355339059328, 13.25], [99.32322330470336, 13.323223304703363], [98.96966991411009, 13.469669914110089]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.314281466051341}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.661817328784107}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.372738447996937, 20.721965540524423, 22.05986547087747, 22.96854220903782, 23.971637137532355]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.74993407295665, 15.867196978612355, 17.12603707922733, 20.228077946249925, 21.991899842763644]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8114347107447077, -4.490369168738035, -3.279803896517853, -2.705992113290947, -2.2333069080968664]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.652897301231121, -6.314281466051341, -4.987521473243305, -3.830869678029785, -3.2614185332283796]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9785339889949627, -2.409352742660927, -1.7641040947138864, -1.5854659930086739, -1.259513768139103]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.476777380282208, -3.0237360864017697, -2.476295017418429, -2.1749970057685193, -1.5079012989068685]}}