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Adam H. Monahan, John C. Fyfe, Maarten H. P. Ambaum, David B. Stephenson, and Gerald R. North

use EOF analysis as a tool to probe the physics underlying the variability in a geophysical field of interest. There is no problem with the use of EOF analysis to identify structures in geophysical data [from observations or general circulation models (GCMs)], which carry relatively large fractions of variance in the field under consideration. Problems can begin when these statistical structures are interpreted as being of individual dynamical, kinematic, or statistical meaning and are used to

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Dayton G. Vincent, Jon M. Schrage, and L. David Sliwinski

1296 JOURNAL OF CLIMATE VOLUME8Recent Climatology of Kinematic Variables in the TOGA-COARE RegionDAYTON G. VINCENT, JON M. SCHRAGE, AND L. DAVID SLIWINSKI*Department of Earth and .4tmospheric Sciences, Purdue University, West Lafayette, Indiana(Manuscript received 3 December 1993, in final form 26 August 1994)ABSTRACT The importance of the "warm pool" region of the western Pacific on in situ and global

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Robert Cifelli, Lawrence Carey, Walter A. Petersen, and Steven A. Rutledge

kinematic and microphysical differences of east and west convection (e.g., Cifelli et al. 2002 ; Williams and Rutledge 2003, manuscript submitted to Mon. Wea. Rev. ); however, these studies were limited in scope (contrasting one event in the ER with one event in the WR) and did not address the issue of whether systematic differences were found across the entire dataset sampled during TRMM-LBA. The goal of this study is to examine the spectrum of convection sampled in this region during TRMM-LBA and

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Xiaolan L. Wang and Val R. Swail

trend and variability. The most important feature of the hindcast was the rigorous attention devoted to producing the wind fields used to drive the wave model. To remove potential biases in the historical wind fields, all wind observations from ships and buoys were reassimilated into the analysis taking account of the method of observation, anemometer height, and stability. Wind fields for all significant storms were then painstakingly kinematically reanalyzed. Furthermore, high-resolution surface

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Jason P. Dunion and Christopher S. Marron

soundings in the 2002 dataset. However, although this could impact the relative number of SAL versus non-SAL soundings, it is unlikely that the thermodynamics and kinematics of the SAL and non-SAL soundings at this site would be significantly different from those at the other three sites. Twice daily (0000 and 1200 UTC) rawinsondes were collected from July to October 2002. GOES SAL tracking imagery ( Dunion and Velden 2004 ) was used to distinguish between rawinsondes launched in SAL versus non

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Adam H. Monahan

using an idealized kinematic model in which it assumed that the vector wind variability is dominated by the passage of circularly symmetric Gaussian eddies with specified strength, width, and propagation speed and direction, embedded in a uniform large-scale flow ( appendix A ). With the further simplifying approximation that all eddies are of the same size and propagate at the same speed, the lag acfs of the along- and across-track winds (respectively u and υ ) can be shown to be where the eddy

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Jason P. Dunion

the Atlantic hurricane season: midlatitude dry air intrusions (MLDAIs). Discussion of the set of three new mean soundings [moist tropical (MT), SAL, and MLDAIs] is presented in detail and includes discussion on aspects of the mean state and temporal variability of their thermodynamics, kinematics, and stability. These new soundings represent a new benchmark for the TNAC region and could have important implications related to our understanding of the climatology for this part of the world. 2. Data

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Nicholas A. Bond

(dashed lines). The ship's measurements of the wind at 33 m areindicated with solid dots.soundings improves this accuracy and smooths turbulent-scale fluctuations.A combined thermodynamic-kinematic soundingover the cool water is shown in Fig. 3. The 0,, profileincludes a statically unstable layer from the surface to100 m (hereafter termed the surface layer), a layerof constant 0,, from '-100 m to '-400 m (hereaftertermed the mixed layer), and a layer of strong stabilityfrom -900 to 1000 m (the trade

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Paul S. Schopf and Robert J. Burgman

mean state are simply kinematic, can we discern between changes that are fundamental to the oscillator and those that are not? Fluegel and Chang’s hypothesis that variations in the noise are the source of decadal variations in ENSO may still be relevant, but the system presented here has an essential nonlinearity that leads to the conclusion that changes in ENSO variance must lead to a change in the Eulerian time mean structure of the thermocline. Along the way, we will highlight how the mechanism

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M.J. Fennessy, J.L. Kinter III, B. Kirtman, L. Marx, S. Nigam, E. Schneider, J. Shukla, D. Straus, A. Vernekar, Y. Xue, and J. Zhou

distribution of precipitation inthese regions through modulations of the low-levelmoisture convergence field. The low-level convergencein the linear model results from the kinematic effectof air blowing over the mountains at the lower boundary (specified as a boundary condition) and the dynamical response of the atmosphere to this forcing,which affects convergence both near the mountains andin remote regions. A separate calculation of the kinematic effect reveals that the dynamical response is asimportant

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