Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3921-3940 of 5084
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Comparison between Standard and Modified Forward Scattering Spectrometer Probes during the Small Cumulus Microphysics Study
(American Meteorological Society, 2002)Microphysical measurements performed during the Small Cumulus Microphysics Study (SCMS) experiment are analyzed in order to examine the instrumental limitations of forward scattering spectrometer probes (FSSPs). Complementary ... -
Development of a Nonlinear Statistical Method for Estimating the Downward Longwave Radiation at the Surface from Satellite Observations
(American Meteorological Society, 2002)This paper develops a nonlinear statistical method that uses satellite radiance observations directly to estimate the downward longwave radiation (DLR) at the earth's surface, a necessary component of the surface energy ... -
CFD Model Estimates of the Airflow Distortion over Research Ships and the Impact on Momentum Flux Measurements
(American Meteorological Society, 2002)Wind velocity and air?sea turbulent flux measurements made from shipborne instruments are biased due to the effect of the ship on the flow of air to the instruments. The presence of the ship causes the airflow to a particular ... -
Approximation for the Inverse Speed of Sound in Seawater, Suitable for Assimilating Acoustic Tomography Data into Numerical Models
(American Meteorological Society, 2002)An approximate formula for the reciprocal speed of sound in seawater is obtained in the form of a polynomial that is cubic in potential temperature, and quadratic in pressure and salinity. The expression provides a ... -
Spatial Processing of Range-Bin ADCP Data to Resolve Small-Scale Frontal Features
(American Meteorological Society, 2002)A new approach is proposed for the processing of acoustic Doppler current profiler (ADCP) data that has the potential to better resolve the structure of small-scale dynamical features such as strongly convergent current ... -
Estimating Mooring Motion when the Pressure Sensors Fail: A Method Employing Inverted Echo Sounders
(American Meteorological Society, 2002)In the presence of a strong current, such as the Gulf Stream or the North Atlantic Current, current meter moorings are known to ?blow over? due to drag from the moving water. This dipping of the current meters, which has ... -
Variational Interpolation of Circulation with Nonlinear, Advective Smoothing
(American Meteorological Society, 2002)A modified variational algorithm, previously proposed in meteorology, is presented for the interpolation of oceanic hydrographic and velocity data. The technique is anisotropic and involves a variational approach that ... -
Stability Parameters and Wind-Stress Coefficients under Various Atmospheric Conditions
(American Meteorological Society, 1986)Stability parameters and wind-stress coefficients under various atmospheric conditions are related to wind velocity and air-sea temperature difference. Readily applicable formulae, without iterative computations, of ... -
Fourth- and Fifth-Order Finite-Difference Methods Applied to a Control-Volume Ocean Model
(American Meteorological Society, 2002)A semi-implicit, control-volume, nonhydrostatic model is presented. Advection is fifth order with respect to space. Boundary conditions and molecular fluxes are also formulated at fourth order with respect to space. ... -
An Alternative Leapfrog Scheme for Surface Gravity Wave Equations
(American Meteorological Society, 2002)An alternative leapfrog scheme using a staggered time grid system is proposed to solve surface gravity wave equations. In addition to the nondissipative second-order accuracy scheme that is inherent in the standard leapfrog ... -
Internal Pressure Errors in Sigma-Coordinate Ocean Models
(American Meteorological Society, 2002)Sigma-coordinate ocean models, or models based on more generalized topography following coordinate systems, are presently widely used in oceanographic studies. The controversy over internal pressure errors in sigma-coordinate ... -
Turbulent Patch Identification in Microstructure Profiles: A Method Based on Wavelet Denoising and Thorpe Displacement Analysis
(American Meteorological Society, 2002)A new method based on wavelet denoising and the analysis of Thorpe displacements dT profiles is presented for turbulent patch identification. Thorpe profiles are computed by comparing the observed density profile ?(z) and ... -
Design and Performance of a Horizontal Mooring for Upper-Ocean Research
(American Meteorological Society, 2002)This paper describes the design and performance of a two-dimensional moored array for sampling horizontal variability in the upper ocean. The mooring was deployed in Massachusetts Bay in a water depth of 84 m for the purpose ... -
Ocean Interpolation by Four-Dimensional Weighted Least Squares—Application to the Waters around Australasia
(American Meteorological Society, 2002)A new four-dimensional ocean interpolation system based on locally weighted least squares fitting is presented. A loess filter is used to interpolate irregularly spaced data onto a uniform grid. This involves projecting ... -
FES99: A Global Tide Finite Element Solution Assimilating Tide Gauge and Altimetric Information
(American Meteorological Society, 2002)An improved version of the global hydrodynamic tide solutions [finite element solutions (FESs) FES94, FES95.2.1, and FES98] has been developed, implemented, and validated. The new model is based on the resolution of the ... -
Sampling of the Diurnal Cycle of Precipitation Using TRMM
(American Meteorological Society, 2002)The temporal sampling of tropical regions is examined using observations from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) and precipitation radar (PR). It is concluded that PR estimates at any one ... -
Performance Assessment of the Optical Transient Detector and Lightning Imaging Sensor. Part I: Predicted Diurnal Variability
(American Meteorological Society, 2002)Laboratory calibration and observed background radiance data are used to determine the effective sensitivities of the Optical Transient Detector (OTD) and Lightning Imaging Sensor (LIS), as functions of local hour and pixel ... -
A Dynamic Parallel Data-Computing Environment for Cross-Sensor Satellite Data Merger and Scientific Analysis
(American Meteorological Society, 2002)The Data Processing and Error Analysis System (DPEAS) is a dynamic parallel data processing system for cross-sensor satellite data merger and analysis. Using a peer-to-peer methodology, DPEAS is able to distribute and ... -
A Comparison of Methods for Determining Tropopause Height from VHF Radar Observations
(American Meteorological Society, 1986)Four methods of estimating the height of the tropopause with VHF radar are compared and evaluated using data from a wind-profiling radar located at Platteville, Colorado, approximately 50 km north of Denver. An empirically ... -
A Proposal of Pulse-Pair Doppler Operation on a Spaceborne Cloud-Profiling Radar in the W Band
(American Meteorological Society, 2002)Pulse-pair Doppler operation is considered for the spaceborne mission. In a formalism, the condition that a measured Doppler velocity on pulse-pair operation corresponds to that on the FFT operation is derived. The coherent ...