TITLE

Influence of Moist Physics and Norms on Singular Vectors for a Tropical Cyclone

AUTHOR(S)
Kim, Hyun Mee; Jung, Byoung-Joo
PUB. DATE
February 2009
SOURCE
Monthly Weather Review;Feb2009, Vol. 137 Issue 2, p525
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this study, the structures and growth rates of singular vectors (SVs) for Typhoon Usagi were investigated using different moist physics and norms. The fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) and its tangent linear and adjoint models with a Lanczos algorithm were used to calculate SVs over a 36-h period. The moist physics used for linear (i.e., tangent linear and adjoint model) integrations is large-scale precipitation, and the norms used are dry and moist total energy (TE) norms. Overall, moist physics in linear integrations and a moist TE norm increase the growth rates of SVs and cause smaller horizontal structures and vertical distributions closer to the lower boundary. With a dry TE norm, the SV energy distributions show similar (dissimilar) large- (small-) scale horizontal SV structures for experiments, regardless of physics. The SVs with moist linear physics and a moist TE norm have maximum horizontal energy structures near the typhoon center. With a small weighting on the moisture term in the moist TE norm, both the remote and nearby influences on the TC are indicated by the horizontal SV energy distributions. The kinetic energy shows the largest contributions to the vertical SV TE distributions in most of the experiments, except for the largest moisture (potential energy) contributions to the SV TE at the final (initial) time in the moist TE norm (dry and weighted moist TE norms at uppermost levels). In contrast, the SV vorticity distributions show more consistent structures among experiments with different linear physics and norms, implying that, in terms of the rotational component of the wind field, the SVs are not sensitive to the choice of moist physics and norms. Given large-scale precipitation as the linear moist physics, the SV energy structures and growth rate with a moist TE norm show the largest difference when compared with those with other norms.
ACCESSION #
36925224

 

Related Articles

  • Interaction of Typhoon Shanshan (2006) with the Midlatitude Trough from both Adjoint-Derived Sensitivity Steering Vector and Potential Vorticity Perspectives. Chun-Chieh Wu; Shin-Gan Chen; Jan-Huey Chen; Kun-Hsuan Chou; Po-Hsiung Lin // Monthly Weather Review;Mar2009, Vol. 137 Issue 3, p852 

    Targeted observation is one of the most important research and forecasting issues for improving tropical cyclone predictability. A new parameter [i.e., the adjoint-derived sensitivity steering vector (ADSSV)] has been proposed and adopted as one of the targeted observing strategies in the...

  • Impact of Different Types of ENSO Years on Intensity Changes of Landfalling Tropical Cyclones over China. Liu, Lu // Atmosphere;Mar2019, Vol. 10 Issue 3, p161 

    This study examines whether there are significant differences in intensity and destructiveness of landfalling tropical cyclones (TCs) over China in central Pacific warm (CPW), eastern Pacific warm (EPW) and La Niña (LA) years. By analyzing different seasons and locations of TCs making...

  • Scale Interactions during the Formation of Typhoon Irving. Ritchie, Elizabeth A.; Holland, Greg J. // Monthly Weather Review;Jul97, Vol. 125 Issue 7, p1377 

    The development of Typhoon Irving is investigated using a variety of data, including special research aircraft data from the Tropical Cyclone Motion (TCM-92) experiment, objective analyses, satellite data, and traditional surface and sounding data. The development process is treated as a...

  • A Potential Vorticity and Wave Activity Diagnosis of Optimal Perturbation Evolution. Morgan, Michael C. // Journal of the Atmospheric Sciences;9/1/2001, Vol. 58 Issue 17 

    Investigates the use of potential vorticity (PV) and Eliassen-Palm flux device in diagnosing the singular vector (SV) evolution in the Eady model. Structure of the Eady model on both long and short wave sides; Alterations in the Eady model SV structures; Occurrence of SV PV vertical...

  • Direct assessment of vorticity alignment with local and nonlocal strain rates in turbulent flows. Hamlington, Peter E.; Schumacher, Jörg; Dahm, Werner J. A. // Physics of Fluids;Nov2008, Vol. 20 Issue 11, p111703 

    A direct Biot-Savart integration is used to decompose the strain rate into its local and nonlocal constituents, allowing the vorticity alignment with the local and nonlocal strain rate eigenvectors to be investigated. These strain rate tensor constituents are evaluated in a turbulent flow using...

  • TORBELLINO ESFERICO DE HILL. Reyes, Fabio; Jácome, C. E.; Giraldo, J. C. // Revista Colombiana de Física;2006, Vol. 38 Issue 4, p1367 

    A study was carried out in a half continuous one incompressible and not viscous, in which the Function of Current thinks about in it anoints sphere, where it is finite and null in the frontier, being obtained the conditions of formation of the spherical Vortex; where the current surfaces are...

  • PRELIMINARY ANALYSIS ON THE INTENSITY AND STRUCTURE OF TYPHOON MORAKOT (2009) DURING ITS LANDING PROCESS. WANG Yong; DING Zhi-ying; LI Xun; SHEN Xin-yong; FAN Yong // Journal of Tropical Meteorology;Mar2014, Vol. 20 Issue 1, p35 

    NCEP GFS (Global Forecast System) analytical data (available 4 times per day), satellite cloud image data and real-time observations of path and intensity of Typhoon Morakot are employed to investigate the variation of synoptic dynamics in its intensity and structure before and after the...

  • SENSITIVITY FACTORS FOR TYPHOON GENESIS OVER THE WESTERN NORTH PACIFIC DURING JULY-SEPTEMBER. WU Sheng-an; LI Tao; KONG Hai-jiang // Journal of Tropical Meteorology;Jun2014, Vol. 20 Issue 2, p112 

    The paper compares the correlations between individual factors of the cyclogenesis and the number of TCs formed in the western North Pacific in July to September (NTWNP). It also compares the characteristics of zonal anomaly distribution of the factors in the primary TC source areas of the...

  • Assessment of the Environmental and Societal Impacts of the Category-3 Typhoon Hato. Chow, Eric C. H.; Wen, Min; Li, Lei; Leung, Marco Y. T.; Cheung, Paxson K. Y.; Zhou, Wen // Atmosphere;Jun2019, Vol. 10 Issue 6, p296 

    The destructiveness and potential hazards brought to the Pearl River Delta (PRD) by the category-3 typhoon Hato in 2017 have been studied. The results show that wind flow is one of the key parameters influenced by tropical cyclones. The observed wind at Shenzhen station changed from median...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics