Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 2121-2140 of 5084
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Independent Evaluation of the Ability of Spaceborne Radar and Lidar to Retrieve the Microphysical and Radiative Properties of Ice Clouds
(American Meteorological Society, 2006)The combination of radar and lidar in space offers the unique potential to retrieve vertical profiles of ice water content and particle size globally, and two algorithms developed recently claim to have overcome the principal ... -
Raman Lidar Measurements during the International H2O Project. Part I: Instrumentation and Analysis Techniques
(American Meteorological Society, 2006)The NASA Goddard Space Flight Center (GSFC) Scanning Raman Lidar (SRL) participated in the International H2O Project (IHOP), which occurred in May and June 2002 in the midwestern part of the United States. The SRL received ... -
A Simple Method for the Assessment of the Cloud Cover State in High-Latitude Regions by a Ground-Based Digital Camera
(American Meteorological Society, 2006)This work describes the development of a simple method of field estimating the sky cloud coverage percentage for several applications at the Brazilian Antarctic Station, Ferraz (62°05?S, 58°23.5?W). The database of this ... -
An Application of Neural Network Technique to Correct the Dome Temperature Effects on Pyrgeometer Measurements
(American Meteorological Society, 2006)This work describes an application of a multilayer perceptron neural network technique to correct dome emission effects on longwave atmospheric radiation measurements carried out using an Eppley Precision Infrared Radiometer ... -
A New Portable Instrument for Continuous Measurement of Formaldehyde in Ambient Air
(American Meteorological Society, 2006)A new instrument for the in situ measurement of formaldehyde with online concentration output was built on the base of the Hantzsch chemistry fluorimetric detection of formaldehyde in liquid phase. The instrument was ... -
Quantifying Global Uncertainties in a Simple Microwave Rainfall Algorithm
(American Meteorological Society, 2006)While a large number of methods exist in the literature for retrieving rainfall from passive microwave brightness temperatures, little has been written about the quantitative assessment of the expected uncertainties in ... -
Adequacy of the In Situ Observing System in the Satellite Era for Climate SST
(American Meteorological Society, 2006)A method is presented to evaluate the adequacy of the recent in situ network for climate sea surface temperature (SST) analyses using both in situ and satellite observations. Satellite observations provide superior ... -
An Integrated Approach to Error Correction for Real-Time Radar-Rainfall Estimation
(American Meteorological Society, 2006)A procedure for estimating radar rainfall in real time consists of three main steps: 1) the measurement of reflectivity and removal of known sources of errors, 2) the conversion of the reflectivity to a rainfall rate (Z?R ... -
An Ocean Refractometer: Resolving Millimeter-Scale Turbulent Density Fluctuations via the Refractive Index
(American Meteorological Society, 2006)A fiberoptic sensor has been constructed to measure oceanic density fluctuations via their refractive index signature. The resolution (?z = 1 mm, ?t = 0.2 ms) and precision (?n < 10?8, ?? = 3.4 ? 10?5 kg m?3) of the device ... -
An Estimate of the Vertical Ozone Profile Discrepancy between the Australian Brewer–Mast and Electrochemical Concentration Cell Ozonesondes
(American Meteorological Society, 2005)An analysis is described that provides an additive correction for referencing the vertical ozone profiles of the Australian Brewer?Mast (BM; October 1984?December 1990) ozonesonde to those of the electrochemical concentration ... -
Detection of the MJO Signal from QuikSCAT
(American Meteorological Society, 2005)Wind data from the SeaWinds instrument on NASA?s Quick Scatterometer (QuikSCAT) satellite are investigated to ascertain how well the surface manifestation of the Madden?Julian oscillation (MJO) can be resolved. The MJO ... -
Sensitivity of the Sandblasting Flux Calculations to the Soil Size Distribution Accuracy
(American Meteorological Society, 2005)Atmospheric dust concentrations are very sensitive to the dust surface emissions that are mainly controlled by saltation and sandblasting processes. Thus, a correct modeling of concentrations directly depends on mass flux ... -
Droplet Spectra Measurements with the FSSP-100. Part II: Coincidence Effects
(American Meteorological Society, 2005)At high droplet number concentration, measurements of the droplet number concentration, of the droplet spectrum, and of the liquid water content with the FSSP-100 are significantly affected by the coincidences of particles ... -
Vertical Distribution of the Mirror Image Returns Observed by TRMM PR and Estimated for a 35-GHz Radar
(American Meteorological Society, 2005)The vertical distribution of Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR)-observed precipitation reflectivity and their mirror image (MI) reflectivity are outlined in this paper. The purpose of this ... -
Estimation of Ultraviolet-A Irradiance from Measurements of 368-nm Spectral Irradiance
(American Meteorological Society, 2005)The estimation of ultraviolet-A (UV-A) radiation across the earth?s surface is needed to model plant productivity and future impacts of ultraviolet-B radiation on plant productivity. We have developed two models to estimate ... -
Singular Spectrum Analysis of Nonstationary Tidal Currents Applied to ADCP Data from the Northeast Brazilian Shelf
(American Meteorological Society, 2006)The development of new tools for the analysis of nonstationary currents, including tidal currents, has been the subject of recent research. In this work a method for studies of nonstationary barotropic or baroclinic currents ... -
New Spectroradiometers Complying with the NDSC Standards
(American Meteorological Society, 2006)The investigation of the effect of solar ultraviolet (UV) and visible radiation on biological organisms and photochemical reactions requires spectral measurements of the desired radiation parameters of high accuracy. The ... -
Dual-Doppler Analysis in a Single Plane from an Airborne Platform
(American Meteorological Society, 2006)A modified dual-Doppler analysis technique for use with airborne Doppler radars utilizing two fixed beams is presented. Although the data collected by such a system would ideally lie in the plane defined by the radar beam ... -
Measurement of Atmospheric Turbulence by 2-μm Doppler Lidar
(American Meteorological Society, 2005)Two methods for the estimation of the turbulence energy dissipation rate (TEDR) from data measured by a 2-?m coherent Doppler lidar are described in this paper. Based on data measured at the Tarbes-Lourdes-Pyrénées ... -
Droplet Spectra Measurements with the FSSP-100. Part I: Low Droplet Concentration Measurements
(American Meteorological Society, 2005)Entrainment-mixing processes such as droplet spectrum broadening and its impact on the onset of precipitation are, among many others, physical phenomena whose experimental study relies on in-cloud airborne measurements. ...