edu.ucar.opensky::articles:22984 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T02:31:12.249493 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7tt4v4h https://doi.org/10.5065/D6CR5RD9 https Related Dataset #1 ERA-Interim Project https://doi.org/10.5065/D69K487J https Related Dataset #2 NCEP Climate Forecast System Reanalysis (CFSR) 6-hourly Products, January 1979 to December 2010 Climatological analysis of tropical cyclone intensity changes under moderate vertical wind shear 2017-05-01T00:00:00Z publication https://n2t.org/ark:/85065/d7tt4v4h https://doi.org/10.1175/MWR-D-16-0350.1 Rios-Berrios, Rosimar author Torn, R. D. author UCAR/NCAR - Library publisher Although infrequent, tropical cyclones (TCs) can intensify under moderate vertical wind shear (VWS). A potential hypothesis is that other factors-associated with both the TC and its environment-can help offset the effects of VWS and aid intensification. This hypothesis was tested with a large dataset of 6-hourly best tracks and environmental diagnostics for global TCs between 1982 and 2014. Moderate VWS was objectively defined as 4.5-11.0 ms(-1), which represents the 25th-75th percentiles of the global distribution of 200-850-hPa VWS magnitude around TCs. Intensifying events (i.e., unique 6-hourly data points) were compared against steady-state events to determine which TC and environmental characteristics favored intensification under moderate VWS. This comparison showed that intensifying events were significantly stronger, closer to the equator, larger, and moving with a more westward motion than steady-state events. Furthermore, intensifying events moved within environments characterized by warmer sea surface temperatures, greater midtropospheric water vapor, and more easterly VWS than steady-state events. Storm-relative, shear-relative composites suggested that the coupling between water vapor, surface latent heat fluxes, and storm-relative flow asymmetries was conducive for less dry air intrusions and more symmetric rainfall in intensifying events. Last, the comparison showed no systematic differences between environmental wind profiles possibly due to the large temporal variability of VWS. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2017 American Meteorological Society. None eng geoscientificInformation