{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:20:09.234473", "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-Dec-21_to_2020-Dec-28_100.5_31.5"}, "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": 2020120002652}, "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": "December 21 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 28 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 57690.033573952096}, "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": ["China"]}, "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": 31.5}, "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": 99.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 102.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[102.0, 32.25], [102.53, 32.03], [102.677, 31.677], [103.03, 31.53], [103.25, 31.0], [103.03, 30.47], [102.5, 30.25], [102.25, 30.354], [102.0, 30.25], [101.75, 30.354], [101.677, 30.323], [101.53, 29.97], [101.0, 29.75], [100.75, 29.854], [100.5, 29.75], [99.97, 29.97], [99.75, 30.5], [99.854, 30.749], [99.854, 30.75], [99.823, 30.823], [99.47, 30.97], [99.25, 31.5], [99.354, 31.75], [99.323, 31.823], [98.97, 31.97], [98.75, 32.5], [98.854, 32.75], [98.75, 33.0], [98.97, 33.53], [99.323, 33.677], [99.354, 33.75], [99.354, 33.751], [99.25, 34.0], [99.47, 34.53], [100.0, 34.75], [100.53, 34.53], [100.677, 34.177], [101.03, 34.03], [101.25, 33.5], [101.146, 33.25], [101.25, 33.0], [101.125, 32.698], [101.53, 32.53], [101.698, 32.125], [102.0, 32.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "E.Asia", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[99.85355339059328, 31.75], [99.75, 32.0], [99.96966991411009, 32.53033008588991], [100.5, 32.75], [100.75, 32.64644660940672], [101.0, 32.75], [101.53033008588991, 32.53033008588991], [101.75, 32.0], [101.64644660940672, 31.75], [101.75, 31.5], [101.64644660940672, 31.25], [101.75, 31.0], [101.53033008588991, 30.46966991411009], [101.0, 30.25], [100.46966991411009, 30.46966991411009], [100.32322330470336, 30.82322330470336], [99.96966991411009, 30.96966991411009], [99.75, 31.5], [99.85355339059328, 31.75]]]}, "2020-12-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[98.85355339059328, 32.75], [98.75, 33.0], [98.96966991411009, 33.53033008588991], [99.32322330470336, 33.67677669529664], [99.46966991411009, 34.03033008588991], [100.0, 34.25], [100.25, 34.14644660940672], [100.5, 34.25], [101.03033008588991, 34.03033008588991], [101.25, 33.5], [101.14644660940672, 33.25], [101.25, 33.0], [101.125, 32.69822330470336], [101.53033008588991, 32.53033008588991], [101.69822330470336, 32.125], [102.0, 32.25], [102.53033008588991, 32.03033008588991], [102.67677669529664, 31.67677669529664], [103.03033008588991, 31.53033008588991], [103.25, 31.0], [103.03033008588991, 30.46966991411009], [102.5, 30.25], [102.25, 30.353553390593273], [102.0, 30.25], [101.75, 30.353553390593273], [101.67677669529664, 30.32322330470336], [101.53033008588991, 29.96966991411009], [101.0, 29.75], [100.75, 29.853553390593273], [100.5, 29.75], [99.96966991411009, 29.96966991411009], [99.75, 30.5], [99.85355339059328, 30.75], [99.82322330470336, 30.82322330470336], [99.46966991411009, 30.96966991411009], [99.25, 31.5], [99.35355339059328, 31.75], [99.32322330470336, 31.82322330470336], [98.96966991411009, 31.96966991411009], [98.75, 32.5], [98.85355339059328, 32.75]]]}, "2020-12-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[98.85355339059328, 32.75], [98.75, 33.0], [98.96966991411009, 33.53033008588991], [99.32322330470336, 33.67677669529664], [99.46966991411009, 34.03033008588991], [100.0, 34.25], [100.25, 34.14644660940672], [100.5, 34.25], [101.03033008588991, 34.03033008588991], [101.25, 33.5], [101.14644660940672, 33.25], [101.25, 33.0], [101.125, 32.69822330470336], [101.53033008588991, 32.53033008588991], [101.69822330470336, 32.125], [102.0, 32.25], [102.53033008588991, 32.03033008588991], [102.67677669529664, 31.67677669529664], [103.03033008588991, 31.53033008588991], [103.25, 31.0], [103.03033008588991, 30.46966991411009], [102.5, 30.25], [102.25, 30.353553390593273], [102.0, 30.25], [101.75, 30.353553390593273], [101.67677669529664, 30.32322330470336], [101.53033008588991, 29.96966991411009], [101.0, 29.75], [100.75, 29.853553390593273], [100.5, 29.75], [99.96966991411009, 29.96966991411009], [99.75, 30.5], [99.85355339059328, 30.75], [99.82322330470336, 30.82322330470336], [99.46966991411009, 30.96966991411009], [99.25, 31.5], [99.35355339059328, 31.75], [99.32322330470336, 31.82322330470336], [98.96966991411009, 31.96966991411009], [98.75, 32.5], [98.85355339059328, 32.75]]]}, "2020-12-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[98.85355339059328, 32.75], [98.75, 33.0], [98.96966991411009, 33.53033008588991], [99.32322330470336, 33.67677669529664], [99.35355339059328, 33.75], [99.25, 34.0], [99.46966991411009, 34.53033008588991], [100.0, 34.75], [100.53033008588991, 34.53033008588991], [100.67677669529664, 34.17677669529664], [101.03033008588991, 34.03033008588991], [101.25, 33.5], [101.14644660940672, 33.25], [101.25, 33.0], [101.125, 32.69822330470336], [101.53033008588991, 32.53033008588991], [101.69822330470336, 32.125], [102.0, 32.25], [102.53033008588991, 32.03033008588991], [102.67677669529664, 31.67677669529664], [103.03033008588991, 31.53033008588991], [103.25, 31.0], [103.03033008588991, 30.46966991411009], [102.5, 30.25], [102.25, 30.353553390593273], [102.0, 30.25], [101.75, 30.353553390593273], [101.67677669529664, 30.32322330470336], [101.53033008588991, 29.96966991411009], [101.0, 29.75], [100.75, 29.853553390593273], [100.5, 29.75], [99.96966991411009, 29.96966991411009], [99.75, 30.5], [99.85355339059328, 30.75], [99.82322330470336, 30.82322330470336], [99.46966991411009, 30.96966991411009], [99.25, 31.5], [99.35355339059328, 31.75], [99.32322330470336, 31.82322330470336], [98.96966991411009, 31.96966991411009], [98.75, 32.5], [98.85355339059328, 32.75]]]}, "2020-12-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[99.32322330470336, 33.67677669529664], [99.35355339059328, 33.75], [99.25, 34.0], [99.46966991411009, 34.53033008588991], [100.0, 34.75], [100.53033008588991, 34.53033008588991], [100.67677669529664, 34.17677669529664], [101.03033008588991, 34.03033008588991], [101.25, 33.5], [101.14644660940672, 33.25], [101.25, 33.0], [101.125, 32.69822330470336], [101.53033008588991, 32.53033008588991], [101.69822330470336, 32.125], [102.0, 32.25], [102.53033008588991, 32.03033008588991], [102.67677669529664, 31.67677669529664], [103.03033008588991, 31.53033008588991], [103.25, 31.0], [103.03033008588991, 30.46966991411009], [102.5, 30.25], [102.25, 30.353553390593273], [102.0, 30.25], [101.75, 30.353553390593273], [101.5, 30.25], [101.25, 30.353553390593273], [101.0, 30.25], [100.75, 30.353553390593273], [100.5, 30.25], [99.96966991411009, 30.46966991411009], [99.82322330470336, 30.82322330470336], [99.46966991411009, 30.96966991411009], [99.25, 31.5], [99.35355339059328, 31.75], [99.25, 32.0], [99.375, 32.30177669529664], [98.96966991411009, 32.46966991411009], [98.75, 33.0], [98.96966991411009, 33.53033008588991], [99.32322330470336, 33.67677669529664]]]}, "2020-12-26T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[99.25, 34.0], [99.46966991411009, 34.53033008588991], [100.0, 34.75], [100.53033008588991, 34.53033008588991], [100.75, 34.0], [100.53033008588991, 33.46966991411009], [100.0, 33.25], [99.46966991411009, 33.46966991411009], [99.25, 34.0]]]}, "2020-12-27T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[99.25, 34.0], [99.46966991411009, 34.53033008588991], [100.0, 34.75], [100.53033008588991, 34.53033008588991], [100.75, 34.0], [100.53033008588991, 33.46966991411009], [100.0, 33.25], [99.46966991411009, 33.46966991411009], [99.25, 34.0]]]}, "2020-12-28T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[99.25, 34.0], [99.46966991411009, 34.53033008588991], [100.0, 34.75], [100.53033008588991, 34.53033008588991], [100.75, 34.0], [100.53033008588991, 33.46966991411009], [100.0, 33.25], [99.46966991411009, 33.46966991411009], [99.25, 34.0]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 13.18945793552598}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 7.653135813397921}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.616810107710705, -5.1681097084875205, -6.900091538107404, -5.956255620967852, -7.145526021473131, -11.607921428929842, -12.042474560613414, -9.978147726824545]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.472434012822248, 0.7283744591512118, -0.7619114109051566, -0.8516676422045748, -0.9518621907735678, -11.607921428929842, -12.042474560613414, -9.978147726824545]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [7.484834216430636, 8.615645641594089, 6.945249632332638, 8.124068067965284, 7.238534139448973, 4.892033923968654, 4.46881919920213, 6.195286242709415]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [9.094379735225857, 13.18945793552598, 10.902015652259763, 11.326898352937746, 9.851723099331593, 4.892033923968654, 4.46881919920213, 6.195286242709415]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.498916596958407, 1.9250067482600999, 1.5713099337386596, 1.832959623824288, 1.6207482532939015, 1.4189473582282452, 1.2940817039982764, 1.8810664084288877]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6372279912799284, 2.400772137583879, 2.010731377598175, 2.169684943012287, 1.8477262007258275, 1.4189473582282452, 1.2940817039982764, 1.8810664084288877]}}