High-Resolution S-Band Profiling of the Atmospheric Boundary Layer

2001 ◽  
Author(s):  
Stephen J. Frasier ◽  
Andrew L. Pazmany ◽  
Turker Ince
Keyword(s):  
Boundary Layer ◽  
High Resolution ◽  
Atmospheric Boundary Layer

scholarly journals On the algebraic perturbations in atmospheric boundary layer

2019 ◽  
Vol 55 (5) ◽  
pp. 62-75
Author(s):  
O. G. Chkhetiani ◽  
N. V. Vazaeva
Keyword(s):  
Experimental Data ◽  
Boundary Layer ◽  
High Resolution ◽  
Simple Model ◽  
Velocity Profile ◽  
Atmospheric Boundary Layer ◽  
Wind Field ◽  
Acoustic Sounding ◽  
Algebraic Instability ◽  
Scientific Station

A simple model for the development of submesoscale perturbations in the atmospheric boundary layer (ABL) is proposed. The growth of perturbations is associated with the shear algebraic instability of the wind velocity profile in the atmospheric boundary layer (ABL). For the scales of optimal perturbations (streaks) in the lower part of the ABL, estimates of their sizes were obtained about 100-200 m vertically and 300-600 m horizontally. Similar scales are noted for experimental data on the structure of the wind field in the lower part of the ABL, obtained in 2017, 2018 in the summer at the Tsimlyansk Scientific Station at the acoustic sounding of the atmosphere by the Doppler three-component minisodar of high resolution.

scholarly journals Assessment of Trends and Uncertainties in the Atmospheric Boundary Layer Height Estimated Using Radiosounding Observations over Europe

Atmosphere ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 301
Author(s):  
Fabio Madonna ◽  
Donato Summa ◽  
Paolo Di Di Girolamo ◽  
Fabrizio Marra ◽  
Yuanzu Wang ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Time Series ◽  
High Resolution ◽  
Atmospheric Boundary Layer ◽  
Parametric Uncertainties ◽  
Layer Height ◽  
Boundary Layer Height ◽  
Height Estimates ◽  
Major Player ◽  
Atmospheric Boundary Layer Height

Trends in atmospheric boundary layer height may represent an indication of climate changes. The related modified interaction between the surface and free atmosphere affects both thermodynamics variables and dilution of chemical constituents. Boundary layer is also a major player in various feedback mechanisms of interest for climate models. This paper investigates trends in the nocturnal and convective boundary layer height at mid-latitudes in Europe using radiosounding profiles from the Integrated Global Radiosounding Archive (IGRA). Atmospheric data from the European Centre for Medium-Range Weather Forecasts (ECMWF) ReAnalysis v5 (ERA5) and from the GCOS Reference Upper-Air Network (GRUAN) Lindenberg station are used as intercomparison datasets for the study of structural and parametric uncertainties in the trend analysis. Trends are calculated after the removal of the lag-1 autocorrelation term for each time series. The study confirms the large differences reported in literature between the boundary layer height estimates obtained with the two different algorithms used for IGRA and ERA5 data: ERA5 shows a density distribution with median values of 350 m and 1150 m for the night and the daytime data, respectively, while the corresponding IGRA median values are of 1150 m and 1750 m. An overall good agreement between the estimated trends is found for nighttime data, while daytime ERA5 boundary layer height estimates over Europe are characterized by a lower spatial homogeneity than IGRA. Parametric uncertainties due to missing data in both the time and space domain are also investigated: the former is not exceeding 1.5 m, while the latter are within 10 m during night and 17 m during the day. Recommendations on dataset filtering based on time series completeness are provided. Finally, the comparison between the Lindenberg data as processed at high-resolution by GRUAN and as provided to IGRA at a lower resolution, shows the significant impact of using high-resolution data in the determination of the boundary layer height, with differences from about 200 m to 450 m for both night and day, as well as a large deviation in the estimated trend.

scholarly journals Estimating Atmospheric Boundary Layer Depth Using COSMIC Radio Occultation Data

2011 ◽  
Vol 68 (8) ◽  
pp. 1703-1713 ◽  
Author(s):  
P. Guo ◽  
Y.-H. Kuo ◽  
S. V. Sokolovskiy ◽  
D. H. Lenschow
Keyword(s):  
Boundary Layer ◽  
High Resolution ◽  
Atmospheric Boundary Layer ◽  
Radio Occultation ◽  
Global Analysis ◽  
Temporal Variations ◽  
Radiosonde Data ◽  
Cosmic Radio ◽  
Subtropical Oceans ◽  
St Helena

Abstract This study presents an algorithm for estimating atmospheric boundary layer (ABL) depth from Global Positioning System (GPS) radio occultation (RO) data. The algorithm is applied to the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) RO data and validated using high-resolution radiosonde data from the island of St. Helena (16.0°S, 5.7°W), tropical (30°S–30°N) radiosondes collocated with RO, and European Centre for Medium-Range Weather Forecasts (ECMWF) high-resolution global analyses. Spatial and temporal variations of the ABL depth obtained from COSMIC RO data for a 1-yr period over tropical and subtropical oceans are analyzed. The results demonstrate the capability of RO data to resolve geographical and seasonal variations of ABL height. The spatial patterns of the variations are consistent with those derived from ECMWF global analysis. However, the ABL heights derived from ECMWF global analysis, on average, are negatively biased against those estimated from COSMIC GPS RO data. These results indicate that GPS RO data can provide useful information on ABL height, which is an important parameter for weather and climate studies.

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