Dataset Edition


Microbarometers-Sonic

Contact informations
Organisation name Universidad Complutensede Madrid
Individual name Yagüe Carlos
E-mail carlos@fis.ucm.es
Responsible party role Principal investigator
Identification
DOI 10.6096/BLLAST.MicrobarometerSonic
Resource title Microbarometers-Sonic
Resource abstract During the BLLAST field campaign (14 June to 8 July), three microbarometers PAROSCIENTIFIC (Model 6000-16B) were deployed in supersite 1. The configuration was forming a triangular array of 150m aprox. and at 1m a.g.l.. In order to avoid contamination from wind speed, static pressure ports (GILL 230-61002) are connected to the microbarometers, so that almost all the dynamic perturbation produced by the wind is filtered. These high precision digital instruments can detect very small pressure perturbations, of the order of thousandths of hPa. During BLLAST, a sampling rate of 2Hz is chosen as a compromise between having a good temporal resolution and registering small enough pressure perturbations (with this sampling rate the resolution is around 0.002 hPa). The objective is to study the small scale static pressure fluctuations produced in the atmospheric boundary layer. These fluctuations can be due to turbulent motions (high frequency) and also to the propagation of waves of different types (gravity waves, Kelvin-Helmholtz instabilities, etc), produced by different mechanisms such as orographic forcing, fronts, convective forcing, geostrophic adjustment, shear instability, etc. The typical amplitudes of the pressure fluctuations related to waves is in the range of 0.01-0.1 hPa with a periodicity ranging from 1 to 40 minutes, although some episodes of intense mesoscale gravity waves with amplitudes up to 2-3 hPa have been reported. The array configuration of the three microbarometers can be used during specific periods of the field campaigns, to detect and characterize wave events by means of lag analysis, cross-correlation or methods based on wavelets decompositions (wavelength, phase speed and direction of propagation of these waves can be evaluated). Additionally, an Ultrasonic Wind Sensor, uSonic-3 Scientific (previously USA-1) (METEK) has been deployed above the Microbarometer A, at z=2.4m agl measuring the 3 velocity components (u, v and w) and sonic temperature (T) at 20 Hz sampling rate.
Geographic location
Plateform type Ground Station
Plateform name Microbarometers-Sonic
North bound latitude 43º 07' 26.90'' N
East bound longitude 0º 21' 53.01'' E
South bound latitude 43º 07' 22.16'' N
West bound longitude 0º 21' 46.91'' E
Site Super-Site 1
Sensors
Sensor 1
Instrument type PRESSURE SENSORS
Manufacturer
Model 6000-16B
Calibration June 2011
Spatial resolution
Observation frequency 2 Hz
Sensor 2
Instrument type PRESSURE SENSORS
Manufacturer
Model 6000-16B
Calibration June 2011
Spatial resolution
Observation frequency 2 Hz
Sensor 3
Instrument type PRESSURE SENSORS
Manufacturer
Model 6000-16B
Calibration June 2011
Spatial resolution
Observation frequency 2 Hz
Sensor 4
Instrument type EDDY CORRELATION DEVICES
Manufacturer METEK
Model USA-1
Calibration June 2011
Spatial resolution 0.01 m/s
Observation frequency 20 Hz
Measured parameters
Measured parameter 1
Parameter name
Parameter keyword Atmosphere>Atmospheric Pressure>Gravity Wave>
Unit millibar
Measured parameter 2
Parameter name
Parameter keyword Atmosphere>Atmospheric Winds>Turbulence>
Unit metre per second
Measured parameter 3
Parameter name
Parameter keyword Atmosphere>Atmospheric Temperature>Virtual Temperature>
Unit Degree Celsius
Temporal reference
Starting date 2011-06-14
Ending date 2011-07-08
Date of publication 2011-09-15
Quality and validity
Process history and quality information
Constraints
Conditions applying to access and use Conditions are those described in the BLLAST data policy. Please contact Carlos Yagüe (carlos@fis.ucm.es) before using the data
limitations on public access
Attached file
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