Measurement of the middle-atmosphere temperature profile using a ground-based spectroradiometer facility

Швецов, А. А.; Fedoseev, L. I.; Karashtin, D. A.; Bol’shakov, Oleg; Mukhin, Dmitry; Skalyga, N. K.; Feǐgin, A. M.

doi:10.1007/s11141-010-9230-z

Cited by 12 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Temperature soundings of the atmosphere at high altitudes are not possible without including this effect (Von Engeln et al, 1998;Von Engeln and Buehler, 2002;Stähli et al, 2013;Shvetsov et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Zeeman effect in atmospheric O<sub>2</sub> measured by ground-based microwave radiometry

et al. 2015

View full text Add to dashboard Cite

Abstract. In this work we study the Zeeman effect on stratospheric O 2 using ground-based microwave radiometer measurements. The interaction of the Earth magnetic field with the oxygen dipole leads to a splitting of O 2 energy states, which polarizes the emission spectra. A special campaign was carried out in order to measure this effect in the oxygen emission line centered at 53.07 GHz. Both a fixed and a rotating mirror were incorporated into the TEMPERA (TEMPERature RAdiometer) in order to be able to measure under different observational angles. This new configuration allowed us to change the angle between the observational path and the Earth magnetic field direction. Moreover, a highresolution spectrometer (1 kHz) was used in order to measure for the first time the polarization state of the radiation due to the Zeeman effect in the main isotopologue of oxygen from ground-based microwave measurements. The measured spectra showed a clear polarized signature when the observational angles were changed, evidencing the Zeeman effect in the oxygen molecule. In addition, simulations carried out with the Atmospheric Radiative Transfer Simulator (ARTS) allowed us to verify the microwave measurements showing a very good agreement between model and measurements. The results suggest some interesting new aspects for research of the upper atmosphere.

show abstract

Section: Introductionmentioning

confidence: 99%

Zeeman effect in atmospheric O<sub>2</sub> measured by ground-based microwave radiometry

et al. 2015

View full text Add to dashboard Cite

show abstract

“…It is interesting to note that no realization of a ground-based stratospheric temperature radiometer was reported in the literature for several decades. A recent realization of such an instrument was described by Shvetsov et al (2010).…”

Section: Introductionmentioning

confidence: 99%

Microwave radiometer to retrieve temperature profiles from the surface to the stratopause

et al. 2013

View full text Add to dashboard Cite

Abstract. TEMPERA (TEMPERature RAdiometer) is a new ground-based radiometer which measures in a frequency range from 51-57 GHz radiation emitted by the atmosphere. With this instrument it is possible to measure temperature profiles from ground to about 50 km. This is the first groundbased instrument with the capability to retrieve temperature profiles simultaneously for the troposphere and stratosphere. The measurement is done with a filterbank in combination with a digital fast Fourier transform spectrometer. A hot load and a noise diode are used as stable calibration sources. The optics consist of an off-axis parabolic mirror to collect the sky radiation. Due to the Zeeman effect on the emission lines used, the maximum height for the temperature retrieval is about 50 km. The effect is apparent in the measured spectra. The performance of TEMPERA is validated by comparison with nearby radiosonde and satellite data from the Microwave Limb Sounder on the Aura satellite. In this paper we present the design and measurement method of the instrument followed by a description of the retrieval method, together with a validation of TEMPERA data over its first year, 2012.

show abstract

“…The possibility of using ground-based microwave radiometry for stratospheric temperature measurements was first raised in Waters (1973) and it has recently been implemented (Shvetsov et al, 2010;Stähli et al, 2013). The technique is based on the stratospheric thermal emission from high-rotational magnetic dipole transitions of molecular oxygen around 53 GHz.…”

Section: Introductionmentioning

confidence: 99%

Intercomparison of stratospheric temperature profiles from a ground-based microwave radiometer with other techniques

et al. 2017

View full text Add to dashboard Cite

Abstract. In this work the stratospheric performance of a relatively new microwave temperature radiometer (TEMPERA) has been evaluated. With this goal in mind, almost 3 years of temperature measurements (January 2014-September 2016) from the TEMPERA radiometer were intercompared with simultaneous measurements from other techniques: radiosondes, MLS satellite and Rayleigh lidar. This intercomparison campaign was carried out at the aerological station of MeteoSwiss at Payerne (Switzerland). In addition, the temperature profiles from TEMPERA were used to validate the temperature outputs from the SD-WACCM model. The results showed in general a very good agreement between TEM-PERA and the different instruments and the model, with a high correlation (higher than 0.9) in the temperature evolution at different altitudes between TEMPERA and the different data sets. An annual pattern was observed in the stratospheric temperature with generally higher temperatures in summer than in winter and with a higher variability during winter. A clear change in the tendency of the temperature deviations was detected in summer 2015, which was due to the repair of an attenuator in the TEMPERA spectrometer. The mean and the standard deviations of the temperature differences between TEMPERA and the different measurements were calculated for two periods (before and after the repair) in order to quantify the accuracy and precision of this radiometer over the campaign period. The results showed absolute biases and standard deviations lower than 2 K for most of the altitudes. In addition, comparisons proved the good performance of TEMPERA in measuring the temperature in the stratosphere.

show abstract

Measurement of the middle-atmosphere temperature profile using a ground-based spectroradiometer facility

Cited by 12 publications

References 8 publications

Zeeman effect in atmospheric O<sub>2</sub> measured by ground-based microwave radiometry

Zeeman effect in atmospheric O<sub>2</sub> measured by ground-based microwave radiometry

Microwave radiometer to retrieve temperature profiles from the surface to the stratopause

Intercomparison of stratospheric temperature profiles from a ground-based microwave radiometer with other techniques

Contact Info

Product

Resources

About

Measurement of the middle-atmosphere temperature profile using a ground-based spectroradiometer facility

Cited by 12 publications

References 8 publications

Zeeman effect in atmospheric O&lt;sub&gt;2&lt;/sub&gt; measured by ground-based microwave radiometry

Zeeman effect in atmospheric O&lt;sub&gt;2&lt;/sub&gt; measured by ground-based microwave radiometry

Microwave radiometer to retrieve temperature profiles from the surface to the stratopause

Intercomparison of stratospheric temperature profiles from a ground-based microwave radiometer with other techniques

Contact Info

Product

Resources

About

Zeeman effect in atmospheric O<sub>2</sub> measured by ground-based microwave radiometry

Zeeman effect in atmospheric O<sub>2</sub> measured by ground-based microwave radiometry