Log in

Relevant bibliographies by topics / Wave flows; EOFs / Journal articles

To see the other types of publications on this topic, follow the link: Wave flows; EOFs.

Journal articles on the topic 'Wave flows; EOFs'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 37 journal articles for your research on the topic 'Wave flows; EOFs.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Franzke, Christian, Daan Crommelin, Alexander Fischer, and Andrew J. Majda. "A Hidden Markov Model Perspective on Regimes and Metastability in Atmospheric Flows." Journal of Climate 21, no. 8 (2008): 1740–57. http://dx.doi.org/10.1175/2007jcli1751.1.

Full text

Abstract:

Abstract In this study, data from three atmospheric models are analyzed to investigate the existence of atmospheric flow regimes despite nearly Gaussian statistics of the planetary waves in these models. A hierarchy of models is used, which describes the atmospheric circulation with increasing complexity. To systematically identify atmospheric regimes, the presence of metastable states in the data is searched for by fitting so-called hidden Markov models (HMMs) to the time series. A hidden Markov model is designed to describe the situation in which part of the information of the system is unkn

APA, Harvard, Vancouver, ISO, and other styles

2

Teng, Haiyan, and Grant Branstator. "A Zonal Wavenumber 3 Pattern of Northern Hemisphere Wintertime Planetary Wave Variability at High Latitudes." Journal of Climate 25, no. 19 (2012): 6756–69. http://dx.doi.org/10.1175/jcli-d-11-00664.1.

Full text

Abstract:

Abstract A prominent pattern of variability of the Northern Hemisphere wintertime tropospheric planetary waves, referred to here as the Wave3 pattern, is identified from the NCEP–NCAR reanalysis. It is worthy of attention because its structure is similar to the linear trend pattern as well as the leading pattern of multidecadal variability of the planetary waves during the past half century. The Wave3 pattern is defined as the second empirical orthogonal function (EOF) of detrended December–February mean 300-hPa meridional wind V300 and denotes a zonal shift of the ridges and troughs of the cl

APA, Harvard, Vancouver, ISO, and other styles

3

Suwa, Yudai. "On the importance of the equation of state for the neutrino-driven supernova explosion mechanism." Proceedings of the International Astronomical Union 7, S279 (2011): 397–98. http://dx.doi.org/10.1017/s174392131201352x.

Full text

Abstract:

AbstractWe present two-dimensional numerical simulations of core-collapse supernova including multi-energy neutrino radiative transfer. We aim to examine the influence of the equation of state (EOS) for the dense nuclear matter. We employ four sets of EOSs, namely, those by Lattimer and Swesty (LS) and Shen et al., which became standard EOSs in the core-collapse supernova community. We reconfirm that not every EOS produces an explosion in spherical symmetry, which is consistent with previous works. In two-dimensional simulations, we find that the structure of the accretion flow is significantl

APA, Harvard, Vancouver, ISO, and other styles

4

Dubos, Thomas, Philippe Drobinski, and Pierre Carlotti. "Turbulence Anisotropy Carried by Streaks in the Neutral Atmospheric Surface Layer." Journal of the Atmospheric Sciences 65, no. 8 (2008): 2631–45. http://dx.doi.org/10.1175/2007jas2333.1.

Full text

Abstract:

Abstract The authors investigate the relationships between coherent structures and turbulence anisotropy in the neutral planetary boundary layer by means of empirical orthogonal function (EOF) analysis of large-eddy simulation (LES) data. The simulated flow contains near-surface transient streaks. The EOF analysis extracts the most energetic patterns from the velocity fluctuations based on their second-order spatial correlations. The scale and direction of streaks obtained from a level-by-level analysis of the LES flow field do correspond to that of the EOFs. It is found that two characteristi

APA, Harvard, Vancouver, ISO, and other styles

5

Hu, Feng, Leying Zhang, Qiao Liu, and Dorina Chyi. "Environmental Factors Controlling the Precipitation in California." Atmosphere 12, no. 8 (2021): 997. http://dx.doi.org/10.3390/atmos12080997.

Full text

Abstract:

Using observational data covering 1948–2020, the environmental factors controlling the winter precipitation in California were investigated. Empirical orthogonal function (EOF) analysis was applied to identify the dominant climate regimes contributing to the precipitation. The first EOF mode described a consistent change, with 70.1% variance contribution, and the second mode exhibited a south–east dipole change, with 11.7% contribution. For EOF1, the relationship was positive between PC1(principal component) and SST (sea surface temperature) in the central Pacific Ocean, while it was negative

APA, Harvard, Vancouver, ISO, and other styles

6

Rennert, Kevin J., and John M. Wallace. "Cross-Frequency Coupling, Skewness, and Blocking in the Northern Hemisphere Winter Circulation." Journal of Climate 22, no. 21 (2009): 5650–66. http://dx.doi.org/10.1175/2009jcli2669.1.

Full text

Abstract:

Abstract Variability in daily wintertime [December–February (DJF)] 500-hPa heights on low [L: &lt;(30 day)−1], intermediate [M: (6–30 day)−1], and high [H: &gt;(6 day)−1] frequencies is examined using 40-yr ECMWF Re-Analysis (ERA-40) data. Leading EOFs of L correspond to planetary-scale teleconnection patterns; those of M to retrograding, eastward-dispersing long waves oriented along great circle routes; and those of H to baroclinic waves in the climatological-mean storm tracks. In the Atlantic sector, EOF 1 of M appears to be embedded in EOF 1 of L. Cross-frequency coupling between L

APA, Harvard, Vancouver, ISO, and other styles

7

Dias, Juliana, and George N. Kiladis. "The Relationship between Equatorial Mixed Rossby–Gravity and Eastward Inertio-Gravity Waves. Part II." Journal of the Atmospheric Sciences 73, no. 5 (2016): 2147–63. http://dx.doi.org/10.1175/jas-d-15-0231.1.

Full text

Abstract:

Abstract Space–time spectral analysis of tropical cloudiness data shows strong evidence that convectively coupled n = 0 mixed Rossby–gravity waves (MRGs) and eastward inertio-gravity waves (EIGs) occur primarily within the western/central Pacific Ocean. Spectral filtering also shows that MRG and EIG cloudiness patterns are antisymmetric with respect to the equator, and they propagate coherently toward the west and east, respectively, with periods between 3 and 5 days, in agreement with Matsuno’s linear shallow-water theory. In contrast to the spectral approach, in a companion paper it has been

APA, Harvard, Vancouver, ISO, and other styles

8

Evans, K. F., J. R. Wang, D. O'C Starr, et al. "Ice hydrometeor profile retrieval algorithm for high-frequency microwave radiometers: application to the CoSSIR instrument during TC4." Atmospheric Measurement Techniques 5, no. 9 (2012): 2277–306. http://dx.doi.org/10.5194/amt-5-2277-2012.

Full text

Abstract:

Abstract. A Bayesian algorithm to retrieve profiles of cloud ice water content (IWC), ice particle size (Dme), and relative humidity from millimeter-wave/submillimeter-wave radiometers is presented. The first part of the algorithm prepares an a priori file with cumulative distribution functions (CDFs) and empirical orthogonal functions (EOFs) of profiles of temperature, relative humidity, three ice particle parameters (IWC, Dme, distribution width), and two liquid cloud parameters. The a priori CDFs and EOFs are derived from CloudSat radar reflectivity profiles and associated ECMWF temperature

APA, Harvard, Vancouver, ISO, and other styles

9

Evans, K. F., J. R. Wang, D. O'C Starr, et al. "Ice hydrometeor profile retrieval algorithm for high frequency microwave radiometers: application to the CoSSIR instrument during TC4." Atmospheric Measurement Techniques Discussions 5, no. 2 (2012): 3117–98. http://dx.doi.org/10.5194/amtd-5-3117-2012.

Full text

Abstract:

Abstract. A Bayesian algorithm to retrieve profiles of cloud ice water content (IWC), ice particle size (Dme), and relative humidity from millimeter-wave/submillimeter-wave radiometers is presented. The first part of the algorithm prepares an a priori file with cumulative distribution functions (CDFs) and empirical orthogonal functions (EOFs) of profiles of temperature, relative humidity, three ice particle parameters (IWC, Dme, distribution width), and two liquid cloud parameters. The a priori CDFs and EOFs are derived from CloudSat radar reflectivity profiles and associated ECMWF temperature

APA, Harvard, Vancouver, ISO, and other styles

10

Lorenz, David J. "Understanding Midlatitude Jet Variability and Change Using Rossby Wave Chromatography: Wave–Mean Flow Interaction." Journal of the Atmospheric Sciences 71, no. 10 (2014): 3684–705. http://dx.doi.org/10.1175/jas-d-13-0201.1.

Full text

Abstract:

Abstract Rossby wave chromatography (RWC) is implemented in a linearized barotropic model as a tool to understand the interaction between the midlatitude jet and the eddy momentum fluxes (uυ) in an idealized GCM. Given the background zonal-mean flow and the space–time structure of the baroclinic wave activity source, RWC calculates the space–time structure of the upper-tropospheric uυ. RWC allows a clean separation of the effects of phase speed changes and index of refraction changes (i.e., changes in background flow) on uυ. It is found that uυ reinforces imposed zonal-mean zonal wind (u) anom

APA, Harvard, Vancouver, ISO, and other styles

11

Zeiden, Kristin L., Jennifer A. MacKinnon, Matthew H. Alford, Daniel L. Rudnick, Gunnar Voet, and Hemantha Wijesekera. "Broadband Submesoscale Vorticity Generated by Flow around an Island." Journal of Physical Oceanography 51, no. 4 (2021): 1301–17. http://dx.doi.org/10.1175/jpo-d-20-0161.1.

Full text

Abstract:

AbstractAn array of moorings deployed off the coast of Palau is used to characterize submesoscale vorticity generated by broadband upper-ocean flows around the island. Palau is a steep-sided archipelago lying in the path of strong zonal geostrophic currents, but tides and inertial oscillations are energetic as well. Vorticity is correspondingly broadband, with both mean and variance O(f) in a surface and subsurface layer (where f is the local Coriolis frequency). However, while subinertial vorticity is linearly related to the incident subinertial current, the relationship between superinertial

APA, Harvard, Vancouver, ISO, and other styles

12

Sandler, Dor, and Nili Harnik. "Future wintertime meridional wind trends through the lens of subseasonal teleconnections." Weather and Climate Dynamics 1, no. 2 (2020): 427–43. http://dx.doi.org/10.5194/wcd-1-427-2020.

Full text

Abstract:

Abstract. Large-scale atmospheric circulation is expected to change considerably in the upcoming decades, and with it the interaction between Rossby waves and the jet stream. A common feature of midlatitude wintertime variability is upper-tropospheric quasi-stationary number 5 wave packets, which often propagate zonally along the jet. These are collectively referred to as the circumglobal teleconnection pattern (CTP). Their likeness seemingly emerges as a robust signal in future meridional wind trend projections in the Northern Hemisphere, which take the form of a zonal wave encompassing the m

APA, Harvard, Vancouver, ISO, and other styles

13

Nakamura, Mototaka, and Shozo Yamane. "Dominant Anomaly Patterns in the Near-Surface Baroclinicity and Accompanying Anomalies in the Atmosphere and Oceans. Part I: North Atlantic Basin." Journal of Climate 22, no. 4 (2009): 880–904. http://dx.doi.org/10.1175/2008jcli2297.1.

Full text

Abstract:

Abstract Variability in the monthly mean flow and storm track in the North Atlantic basin is examined with a focus on the near-surface baroclinicity, B = Bxi + Byj. Dominant patterns of anomalous B found from empirical orthogonal function (EOF) analyses generally show patterns of shift and changes in the strength of B. Composited anomalies in the monthly mean wind at various pressure levels based on the signals in the EOFs display robust accompanying anomalies in the mean flow up to 50 hPa in the winter and up to 100 hPa in other seasons. Anomalous eddy fields accompanying the anomalous Bx pat

APA, Harvard, Vancouver, ISO, and other styles

14

Jiang, Boyang, and James Kaihatu. "MULTI-DIMENSIONAL ERROR ANALYSIS OF NEARSHORE WAVE MODELING TOOLS, WITH APPLICATION TOWARD DATA-DRIVEN BOUNDARY CORRECTION." Coastal Engineering Proceedings 1, no. 32 (2011): 67. http://dx.doi.org/10.9753/icce.v32.waves.67.

Full text

Abstract:

As the forecasting models become more sophisticated in their physics and possible depictions of the nearshore hydrodynamics, they also become increasingly sensitive to errors in the inputs, such as errors in the specification of boundary information (lateral boundary conditions, initial boundary conditions, etc). Evaluation of the errors on the boundary is less straightforward, and is the subject of this study. The model under investigation herein is the Delft3D modeling suite, developed at Deltares (formerly Delft Hydraulics) in Delft, the Netherlands. Coupling of the wave (SWAN) and hydrodyn

APA, Harvard, Vancouver, ISO, and other styles

15

Nakamura, Mototaka, and Shozo Yamane. "Dominant Anomaly Patterns in the Near-Surface Baroclinicity and Accompanying Anomalies in the Atmosphere and Oceans. Part II: North Pacific Basin." Journal of Climate 23, no. 24 (2010): 6445–67. http://dx.doi.org/10.1175/2010jcli3017.1.

Full text

Abstract:

Abstract Variability in the monthly-mean flow and storm track in the North Pacific basin is examined with a focus on the near-surface baroclinicity. Dominant patterns of anomalous near-surface baroclinicity found from empirical orthogonal function (EOF) analyses generally show mixed patterns of shift and changes in the strength of near-surface baroclinicity. Composited anomalies in the monthly-mean wind at various pressure levels based on the signals in the EOFs show accompanying anomalies in the mean flow up to 50 hPa in the winter and up to 100 hPa in other seasons. Anomalous eddy fields acc

APA, Harvard, Vancouver, ISO, and other styles

16

Mounier, Flore, George N. Kiladis, and Serge Janicot. "Analysis of the Dominant Mode of Convectively Coupled Kelvin Waves in the West African Monsoon." Journal of Climate 20, no. 8 (2007): 1487–503. http://dx.doi.org/10.1175/jcli4059.1.

Full text

Abstract:

Abstract The dominant mode of convectively coupled Kelvin waves has been detected over the Atlantic and Africa during northern summer by performing composite analyses on observational fields based on an EOF reconstructed convection index over West Africa. Propagating eastward, many waves originate from the Pacific sector, interact with deep convection of the marine ITCZ over the Atlantic and the continental ITCZ over West and central Africa, and then weaken over East Africa and the Indian Ocean. It has been shown that they are able to modulate the life cycle and track of individual westward-pr

APA, Harvard, Vancouver, ISO, and other styles

17

Wai, OWH, and KW Bedford. "Empirical orthogonal functional analysis of sediment concentration profiles subjected to waves and currents." Marine and Freshwater Research 46, no. 1 (1995): 373. http://dx.doi.org/10.1071/mf9950373.

Full text

Abstract:

Spatial and temporal eigenfunctions for profiles of suspended-sediment concentrations collected during three distinct flow conditions (current-dominated, wave-dominated, and wave- current-dominated) were used to study the non-linear sediment dynamics in the water column. The eigenfunctions were obtained by the method of Empirical Orthogonal Function (EOF) analysis. The variance distribution of the first spatial eigenfunction associated with the largest eigenvalue reflects the characteristic structure of the original profiles, and the second largest spatial eigenfunction indicates the location

APA, Harvard, Vancouver, ISO, and other styles

18

BABA, KENJI, and JAMES RENWICK. "Aspects of intraseasonal variability of Antarctic sea ice in austral winter related to ENSO and SAM events." Journal of Glaciology 63, no. 241 (2017): 838–46. http://dx.doi.org/10.1017/jog.2017.49.

Full text

Abstract:

ABSTRACTWe performed an Empirical Orthogonal Function (EOF) analysis to assess the intraseasonal variability of 5–60 day band-pass filtered Antarctic sea-ice concentration in austral winter using a 20-year daily dataset from 1995 to 2014. Zonal wave number 3 dominated in the Antarctic, especially so across the west Antarctic. Results showed the coexistence of stationary and propagating wave components. A spectral analysis of the first two principal components (PCs) showed a similar structure for periods up to 15 days but generally more power in PC1 at longer periods. Regression analysis upon a

APA, Harvard, Vancouver, ISO, and other styles

19

Zheng, J. G., B. C. Khoo, and Z. M. Hu. "Simulation of Wave-Flow-Cavitation Interaction Using a Compressible Homogenous Flow Method." Communications in Computational Physics 14, no. 2 (2013): 328–54. http://dx.doi.org/10.4208/cicp.050412.140812a.

Full text

Abstract:

AbstractA numerical method based on a homogeneous single-phase flow model is presented to simulate the interaction between pressure wave and flow cavitation. To account for compressibility effects of liquid water, cavitating flow is assumed to be compressible and governed by time-dependent Euler equations with proper equation of state (EOS). The isentropic one-fluid formulation is employed to model the cavitation inception and evolution, while pure liquid phase is modeled by Tait equation of state. Because of large stiffness of Tait EOS and great variation of sound speed in flow field, some of

APA, Harvard, Vancouver, ISO, and other styles

20

Hunt, F. K., R. Tailleux, and J. J. M. Hirschi. "The vertical structure of oceanic Rossby waves: a comparison of high-resolution model data to theoretical vertical structures." Ocean Science 8, no. 1 (2012): 19–35. http://dx.doi.org/10.5194/os-8-19-2012.

Full text

Abstract:

Abstract. Tests of the new Rossby wave theories that have been developed over the past decade to account for discrepancies between theoretical wave speeds and those observed by satellite altimeters have focused primarily on the surface signature of such waves. It appears, however, that the surface signature of the waves acts only as a rather weak constraint, and that information on the vertical structure of the waves is required to better discriminate between competing theories. Due to the lack of 3-D observations, this paper uses high-resolution model data to construct realistic vertical stru

APA, Harvard, Vancouver, ISO, and other styles

21

Hunt, F. K., R. Tailleux, and J. J. M. Hirschi. "The vertical structure of oceanic Rossby waves: a comparison of high-resolution model data to theoretical vertical structures." Ocean Science Discussions 8, no. 3 (2011): 1089–129. http://dx.doi.org/10.5194/osd-8-1089-2011.

Full text

Abstract:

Abstract. Tests of the new Rossby wave theories that have been developed over the past decade to account for discrepancies between theoretical wave speeds and those observed by satellite altimeters have focused primarily on the surface signature of such waves. It appears, however, that the surface signature of the waves acts only as a rather weak constraint, and that information on the vertical structure of the waves is required to better discriminate between competing theories. Due to the lack of 3-D observations, this paper uses high-resolution model data to construct realistic vertical stru

APA, Harvard, Vancouver, ISO, and other styles

22

Zhao, Siyu, Yi Deng, and Robert X. Black. "An Intraseasonal Mode of Atmospheric Variability Relevant to the U.S. Hydroclimate in Boreal Summer: Dynamic Origin and East Asia Connection." Journal of Climate 31, no. 24 (2018): 9855–68. http://dx.doi.org/10.1175/jcli-d-18-0206.1.

Full text

Abstract:

Intraseasonal modes of atmospheric variability over the Northern Hemisphere (NH) midlatitudes in boreal summer are identified via an empirical orthogonal function (EOF) analysis of the daily 10–90-day bandpass-filtered 250-hPa streamfunction for the period of 1950–2016. The first two EOF modes are characterized, respectively, by (i) a single-signed streamfunction anomaly that extends across the NH and (ii) a regional dipole structure with centers over the Aleutian Islands and northeastern Pacific. The third EOF mode (EOF-3) is a quasi-stationary wave train over the Pacific–North American secto

APA, Harvard, Vancouver, ISO, and other styles

23

Zhang, Gan, and Zhuo Wang. "Interannual Variability of the Atlantic Hadley Circulation in Boreal Summer and Its Impacts on Tropical Cyclone Activity." Journal of Climate 26, no. 21 (2013): 8529–44. http://dx.doi.org/10.1175/jcli-d-12-00802.1.

Full text

Abstract:

Abstract A novel method was developed to define the regional Hadley circulation (HC) in terms of the meridional streamfunction. The interannual variability of the Atlantic HC in boreal summer was examined using EOF analysis. The leading mode (M1), explaining more than 45% of the variances, is associated with the intensity change of the ITCZ. M1 is significantly correlated to multiple climate factors and has strong impacts on Atlantic tropical cyclone (TC) activity. In the positive (negative) phase of M1, the ITCZ is stronger (weaker) than normal, and more (fewer) TCs form over the main develop

APA, Harvard, Vancouver, ISO, and other styles

24

Levy, Gad. "Southern hemisphere low level wind circulation statisticsfrom the Seasat scatterometer." Annales Geophysicae 12, no. 1 (1994): 65–79. http://dx.doi.org/10.1007/s00585-994-0065-9.

Full text

Abstract:

Abstract. Analyses of remotely sensed low-level wind vector data over the Southern Ocean are performed. Five-day averages and monthly means are created and the month-to-month variability during the winter (July-September) of 1978 is investigated. The remotely sensed winds are compared to the Australian Bureau of Meteorology (ABM) and the National Meteorological Center (NMC) surface analyses. In southern latitudes the remotely sensed winds are stronger than what the weather services' analyses suggest, indicating underestimation by ABM and NMC in these regions. The evolution of the low-level jet

APA, Harvard, Vancouver, ISO, and other styles

25

Chen, Xiao-Peng, and Ming Liu. "Simulation of Acoustic Behavior of Bubbly Liquids with Hybrid Lattice Boltzmann and Homogeneous Equilibrium Models." Communications in Computational Physics 17, no. 4 (2015): 925–36. http://dx.doi.org/10.4208/cicp.2014.m283.

Full text

Abstract:

AbstractHomogeneous equilibrium model (HEM) has been widely used in cavitating flow simulations. The major feature of this model is that a single equation of state (EOS) is proposed to describe the thermal behavior of bubbly liquid, where both kinematic and thermal equilibrium is assumed between two phases. In this paper, the HEM was coupled with multi-relaxation-time lattice Boltzmann model (MRT-LBM) and the acoustic behavior was simulated. Two approaches were applied alternatively: adjusting speed of sound (Buick, J. Phys. A, 2006, 39:13807-13815) and setting real gas EOS. Both approaches re

APA, Harvard, Vancouver, ISO, and other styles

26

LaCasce, J. H., and Sjoerd Groeskamp. "Baroclinic Modes over Rough Bathymetry and the Surface Deformation Radius." Journal of Physical Oceanography 50, no. 10 (2020): 2835–47. http://dx.doi.org/10.1175/jpo-d-20-0055.1.

Full text

Abstract:

AbstractThe deformation radius is widely used as an indication of the eddy length scale at different latitudes. The radius is usually calculated assuming a flat ocean bottom. However, bathymetry alters the baroclinic modes and hence their deformation radii. In a linear quasigeostrophic two-layer model with realistic parameters, the deep flow for a 100-km wave approaches zero with a bottom ridge roughly 10 m high, leaving a baroclinic mode that is mostly surface trapped. This is in line with published current meter studies showing a primary EOF that is surface intensified and has nearly zero fl

APA, Harvard, Vancouver, ISO, and other styles

27

Kikuchi, Kazuyoshi, and Bin Wang. "Global Perspective of the Quasi-Biweekly Oscillation*." Journal of Climate 22, no. 6 (2009): 1340–59. http://dx.doi.org/10.1175/2008jcli2368.1.

Full text

Abstract:

Abstract The quasi-biweekly oscillation (QBW: here defined as a 12–20-day oscillation) is one of the major systems that affect tropical and subtropical weather and seasonal mean climate. However, knowledge is limited concerning its temporal and spatial structures and dynamics, particularly in a global perspective. To advance understanding of the QBW, its life cycle is documented using a tracking method and extended EOF analysis. Both methods yield consistent results. The analyses reveal a wide variety of QBW activity in terms of initiation, movement, development, and dissipation. The convectiv

APA, Harvard, Vancouver, ISO, and other styles

28

Keller, Julia H., Sarah C. Jones, and Patrick A. Harr. "An Eddy Kinetic Energy View of Physical and Dynamical Processes in Distinct Forecast Scenarios for the Extratropical Transition of Two Tropical Cyclones*." Monthly Weather Review 142, no. 8 (2014): 2751–71. http://dx.doi.org/10.1175/mwr-d-13-00219.1.

Full text

Abstract:

Abstract The extratropical transition (ET) of Hurricane Hanna (2008) and Typhoon Choi-Wan (2009) caused a variety of forecast scenarios in the European Centre for Medium-Range Weather Forecasts (ECMWF) Ensemble Prediction System (EPS). The dominant development scenarios are extracted for two ensemble forecasts initialized prior to the ET of those tropical storms, using an EOF and fuzzy clustering analysis. The role of the transitioning tropical cyclone and its impact on the midlatitude flow in the distinct forecast scenarios is examined by conducting an analysis of the eddy kinetic energy budg

APA, Harvard, Vancouver, ISO, and other styles

29

Giddings, Sarah N., Stephen G. Monismith, Derek A. Fong, and Mark T. Stacey. "Using Depth-Normalized Coordinates to Examine Mass Transport Residual Circulation in Estuaries with Large Tidal Amplitude Relative to the Mean Depth." Journal of Physical Oceanography 44, no. 1 (2014): 128–48. http://dx.doi.org/10.1175/jpo-d-12-0201.1.

Full text

Abstract:

Abstract Residual (subtidal) circulation profiles in estuaries with a large tidal amplitude-to-depth ratio often are quite complex and do not resemble the traditional estuarine gravitational circulation profile. This paper describes how a depth-normalized σ-coordinate system allows for a more physical interpretation of residual circulation profiles than does a fixed vertical coordinate system in an estuary with a tidal amplitude comparable to the mean depth. Depth-normalized coordinates permit the approximation of Lagrangian residuals, performance of empirical orthogonal function (EOF) analysi

APA, Harvard, Vancouver, ISO, and other styles

30

Zhu, Jinshuang, Yudi Liu, Ruiqing Xie, and Haijie Chang. "A Comparative Analysis of the Impacts of Two Types of El Niño on the Central and Eastern Pacific ITCZ." Atmosphere 9, no. 7 (2018): 266. http://dx.doi.org/10.3390/atmos9070266.

Full text

Abstract:

The precipitation data from the Global Precipitation Climatology Project (GPCP) and CPC Merged Analysis of Precipitation (CMAP) were used to investigate the discrepancy of Centre and Eastern Pacific ITCZ (CEP-ITCZ) during two types of El Niño years. Two models of the heat source distribution during two types of El Niño events were constructed, and the causes of different CEP-ITCZ anomalies for two types of El Niño events were analyzed through the Gill model. The results show that the CEP-ITCZ precipitation is approximately 4.0° southward, and the intensity is enhanced by 3.6 mm/day during the

APA, Harvard, Vancouver, ISO, and other styles

31

Blanes-Vidal, Victoria, Tomas Majtner, Luis David Avendaño-Valencia, Knud B. Yderstraede, and Esmaeil S. Nadimi. "Invisible Color Variations of Facial Erythema: A Novel Early Marker for Diabetic Complications?" Journal of Diabetes Research 2019 (September 2, 2019): 1–7. http://dx.doi.org/10.1155/2019/4583895.

Full text

Abstract:

Aim. (1) To quantify the invisible variations of facial erythema that occur as the blood flows in and out of the face of diabetic patients, during the blood pulse wave using an innovative image processing method, on videos recorded with a conventional digital camera and (2) to determine whether this “unveiled” facial red coloration and its periodic variations present specific characteristics in diabetic patients different from those in control subjects. Methods. We video recorded the faces of 20 diabetic patients with peripheral neuropathy, retinopathy, and/or nephropathy and 10 nondiabetic co

APA, Harvard, Vancouver, ISO, and other styles

32

Kolovos, Konstantinos, Phoevos Koukouvinis, Robert M. McDavid, and Manolis Gavaises. "Transient Cavitation and Friction-Induced Heating Effects of Diesel Fuel during the Needle Valve Early Opening Stages for Discharge Pressures up to 450 MPa." Energies 14, no. 10 (2021): 2923. http://dx.doi.org/10.3390/en14102923.

Full text

Abstract:

An investigation of the fuel heating, vapor formation, and cavitation erosion location patterns inside a five-hole common rail diesel fuel injector, occurring during the early opening period of the needle valve (from 2 μm to 80 μm), discharging at pressures of up to 450 MPa, is presented. Numerical simulations were performed using the explicit density-based solver of the compressible Navier–Stokes (NS) and energy conservation equations. The flow solver was combined with tabulated property data for a four-component diesel fuel surrogate, derived from the perturbed chain statistical associating

APA, Harvard, Vancouver, ISO, and other styles

33

Wettstein, Justin J., and John M. Wallace. "Observed Patterns of Month-to-Month Storm-Track Variability and Their Relationship to the Background Flow*." Journal of the Atmospheric Sciences 67, no. 5 (2010): 1420–37. http://dx.doi.org/10.1175/2009jas3194.1.

Full text

Abstract:

Abstract Month-to-month storm-track variability is investigated via EOF analyses performed on ERA-40 monthly-averaged high-pass filtered daily 850-hPa meridional heat flux and the variances of 300-hPa meridional wind and 500-hPa height. The analysis is performed both in hemispheric and sectoral domains of the Northern and Southern Hemispheres. Patterns characterized as “pulsing” and “latitudinal shifting” of the climatological-mean storm tracks emerge as the leading sectoral patterns of variability. Based on the analysis presented, storm-track variability on the spatial scale of the two Northe

APA, Harvard, Vancouver, ISO, and other styles

34

Weijer, Wilbert, Sarah T. Gille, and Frédéric Vivier. "Modal Decay in the Australia–Antarctic Basin." Journal of Physical Oceanography 39, no. 11 (2009): 2893–909. http://dx.doi.org/10.1175/2009jpo4209.1.

Full text

Abstract:

Abstract The barotropic intraseasonal variability in the Australia–Antarctic Basin (AAB) is studied in terms of the excitation and decay of topographically trapped barotropic modes. The main objective is to reconcile two widely differing estimates of the decay rate of sea surface height (SSH) anomalies in the AAB that are assumed to be related to barotropic modes. First, an empirical orthogonal function (EOF) analysis is applied to almost 15 years of altimeter data. The analysis suggests that several modes are involved in the variability of the AAB, each related to distinct areas with (almost)

APA, Harvard, Vancouver, ISO, and other styles

35

Annamalai, H., and K. R. Sperber. "Regional Heat Sources and the Active and Break Phases of Boreal Summer Intraseasonal (30–50 Day) Variability*." Journal of the Atmospheric Sciences 62, no. 8 (2005): 2726–48. http://dx.doi.org/10.1175/jas3504.1.

Full text

Abstract:

Abstract The boreal summer intraseasonal variability (BSISV) associated with the 30–50-day mode is represented by the coexistence of three components: poleward propagation of convection over the Indian and tropical west Pacific longitudes and eastward propagation along the equator. The hypothesis that the three components influence each other has been investigated using observed outgoing longwave radiation (OLR), NCEP–NCAR reanalysis, and solutions from an idealized linear model. The null hypothesis is that the three components are mutually independent. Cyclostationary EOF (CsEOF) analysis is

APA, Harvard, Vancouver, ISO, and other styles

36

Ng, Chiu-On, and Bo Chen. "Dispersion in Electro-Osmotic Flow Through a Slit Channel With Axial Step Changes of Zeta Potential." Journal of Fluids Engineering 135, no. 10 (2013). http://dx.doi.org/10.1115/1.4024958.

Full text

Abstract:

An analytical study is presented in this paper on hydrodynamic dispersion due to steady electro-osmotic flow (EOF) in a slit microchannel with longitudinal step changes of ζ potential. The channel wall is periodically patterned with alternating stripes of distinct ζ potentials. Existing studies in the literature have considered dispersion in EOF with axial nonuniformity of ζ potential only in the limiting case where the length scale for longitudinal variation is much longer than the cross-sectional dimension of the channel. Hence, the existing theories on EOF dispersion subject to nonuniform c

APA, Harvard, Vancouver, ISO, and other styles

37

"Seismic modelling of the Earth’s large-scale three-dimensional structure." Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 328, no. 1599 (1989): 291–308. http://dx.doi.org/10.1098/rsta.1989.0037.

Full text

Abstract:

Several different kinds of seismological data, spanning more than three orders of magnitude in frequency, have been employed in the study of the Earth’s large-scale three-dimensional structure. These yield different but overlapping information, which is leading to a coherent picture of the Earth’s internal heterogeneity. In this article we describe several methods of seismic inversion and intercom pare the resulting models. Models of upper-mantle shear velocity based upon mantle waveforms (Woodhouse & Dziewonski ( J. geophys. Res . 89 , 5953-5986 (1984))) ( f ≲ 7 mHz) and long-period body

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!