Stratospheric isotopic water profiles from a single submillimeter limb scan by TELIS

Lange, A. de; Landgraf, Jochen; Hoogeveen, Ruud W. M.

doi:10.5194/amt-2-423-2009

Cited by 7 publications

(9 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An instrument model to account for the specifics of the TELIS instrument is included in the forward algorithm. Further details on the forward model are described by de Lange et al (2009) and references therein. The forward model is inverted with a Gauss-Newton iteration scheme in combination with a Tikhonov-Phillips regularization approach (Phillips, 1962;Tikhonov, 1963) as described in the previous section.…”

Section: Telis Instrument and Data Analysismentioning

confidence: 99%

“…A Newtonian relaxation technique of the prognostic variables temperature, vorticity, divergence, and surface pressure above the boundary layer and below 1 hPa towards the ECMWF reanalysis ERA-Interim (Dee et al, 2011) has been applied to the model to simulate realistic synoptic conditions (van Aalst, 2005). Boundary conditions for greenhouse gases, chlorofluorocarbons (CFCs), and halons are adapted from observations (WMO, 2011;Meinshausen et al, 2011).…”

Section: Model Calculationsmentioning

confidence: 99%

See 1 more Smart Citation

Partitioning and budget of inorganic and organic chlorine species observed by MIPAS-B and TELIS in the Arctic in March 2011

et al. 2015

Self Cite

View full text Add to dashboard Cite

Abstract. The Arctic winter 2010/2011 was characterized by a persistent vortex with extremely low temperatures in the lower stratosphere above northern Scandinavia leading to a strong activation of chlorine compounds (ClO x ) like Cl, Cl 2 , ClO, ClOOCl, OClO, and HOCl, which rapidly destroyed ozone when sunlight returned after winter solstice. The MIPAS-B (Michelson Interferometer for Passive Atmospheric Sounding) and TELIS (TErahertz and submillimeter LImb Sounder) balloon measurements obtained in northern Sweden on 31 March 2011 inside the polar vortex have provided vertical profiles of inorganic and organic chlorine species as well as diurnal variations of ClO around sunrise over the whole altitude range in which chlorine has been undergoing activation and deactivation. This flight was performed at the end of the winter during the last phase of ClO x deactivation. The complete inorganic and organic chlorine partitioning and budget for 31 March 2011, assumed to be representative for the late-winter Arctic stratosphere, has been derived by combining MIPAS-B and TELIS simultaneously observed molecules. A total chlorine amount of 3.41 ± 0.30 parts per billion by volume is inferred from the measurements (above 24 km). This value is in line with previous stratospheric observations carried out outside the tropics confirming the slightly decreasing chlorine amount in the stratosphere. Observations are compared and discussed with the output of a multi-year simulation performed with the chemistry climate model EMAC (ECHAM5/MESSy Atmospheric Chemistry). The simulated stratospheric total chlorine amount is in accordance with the MIPAS-B/TELIS observations, taking into account the fact that some chlorine source gases and very short-lived species are not included in the model.

show abstract

Section: Telis Instrument and Data Analysismentioning

confidence: 99%

Section: Model Calculationsmentioning

confidence: 99%

Partitioning and budget of inorganic and organic chlorine species observed by MIPAS-B and TELIS in the Arctic in March 2011

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this study, the most important model parameter error sources defined by the TELIS consortium (also consistent with previous studies, e.g., [38,39,[82][83][84]) are taken into account. In Table 2, these error sources and their corresponding perturbation amounts are summarized.…”

Section: Error Characterizationmentioning

confidence: 61%

“…A feasibility study of isotopic water retrievals using synthetic TELIS data and the first results of hydrogen chloride (HCl) and chlorine monoxide (ClO) using real data during the 2010 campaign were presented in [38,39], respectively. However, radiometric applications using 1.8-THz signals have been rarely exploited for atmospheric research, although there are a number of studies using FIR spectroscopy, for example the 2.5-THz signals measured by the MLS/Aura [40] and the Terahertz OH Measurement Airborne Sounder (THOMAS) [41], the 3.5-THz hydroxyl radical (OH) signature used by a balloon-borne FIR Fourier transform spectrometer [5,42], combined 3.0-and 3.5-THz signals observed by the Far-Infrared Limb Observing Spectrometer (FILOS) [43], and the 11 OH rotational transitions over 2.5-6.9 THz detected by FIRS-2 [15].…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of Balloon-Borne Trace Gas Sounding with the Terahertz Channel of TELIS

Schreier

Wetzel

et al. 2018

Remote Sensing

View full text Add to dashboard Cite

Short-term variations in the atmospheric environment over polar regions are attracting increasing attention with respect to the reliable analysis of ozone loss. Balloon-borne remote sensing instruments with good vertical resolution and flexible sampling density can act as a prototype to overcome the potential technical challenges in the design of new spaceborne atmospheric sensors and represent a valuable tool for validating spaceborne observations. A multi-channel cryogenic heterodyne spectrometer known as the TErahertz and submillimeter LImb Sounder (TELIS) has been developed. It allows limb sounding of the upper troposphere and stratosphere (10-40 km) within the far infrared (FIR) and submillimeter spectral regimes. This paper describes and assesses the performance of the profile retrieval scheme for TELIS with a focus on the ozone (O 3 ), hydrogen chloride (HCl), carbon monoxide (CO), and hydroxyl radical (OH) measured during three northern polar campaigns in 2009, 2010, and 2011, respectively. The corresponding inversion diagnostics reveal that some forward/instrument model parameters play important roles in the total retrieval error. The accuracy of the radiometric calibration and the spectroscopic knowledge has a significant impact on retrieval at higher altitudes, whereas the pointing accuracy dominates the total error at lower altitudes. The TELIS retrievals achieve a vertical resolution of ∼ 2-3 km through most of the stratosphere below the balloon height. Dominant water vapor (H 2 O) contamination and low abundances of the target species reduce the retrieval sensitivity at the lowermost altitudes measured by TELIS. An extensive comparison shows that the TELIS profiles are consistent with profiles obtained by other limb sounders. The comparison appears to be very promising, except for discrepancies in the upper troposphere due to numerical regularization. This study not only consolidates the validity of balloon-borne TELIS FIR measurements, but also demonstrates the scientific relevance and technical feasibility of terahertz limb sounding of the stratosphere.

show abstract

“…A comprehensive description of the instrument is given by Birk et al (2010) and de Lange et al (2012). The HCl and ClO results presented here were derived from spectra in the 480-650 GHz channel with a tunable superconducting integrated receiver developed and characterized by de Lange et al ( , 2012. A local oscillator (LO) reference signal is mixed with the atmospheric signal in a nonlinear mixer.…”

Section: Telis Instrument and Data Analysismentioning

confidence: 99%

Partitioning and budget of inorganic and organic chlorine species observed by MIPAS-B and TELIS in the Arctic in March 2011

Wetzel¹,

Oelhaf²,

Birk³

et al. 2015

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. The Arctic winter 2010/11 was characterized by a persisting vortex with extremely cold temperatures in the lower stratosphere above northern Scandinavia leading to a strong activation of chlorine compounds (ClOx) like Cl, Cl2, ClO, ClOOCl, OClO, and HOCl which rapidly destroyed ozone when sunlight returned after winter solstice. MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) and TELIS (Terahertz and submillimeter Limb Sounder) balloon measurements obtained in northern Sweden on 31 March 2011 inside the polar vortex have provided vertical profiles of inorganic and organic chlorine species as well as diurnal variations of ClO around sunrise over the whole altitude range in which chlorine is undergoing activation and deactivation. This flight was performed at the end of the winter during the last phase of ClOx deactivation. The complete inorganic and organic chlorine partitioning and budget in the stratosphere has been derived by combining MIPAS-B and TELIS simultaneously observed molecules. A total chlorine amount of 3.41 ± 0.30 ppbv is inferred from the measurements. This value is in line with previously carried out stratospheric observations confirming the slightly decreasing chlorine trend in the stratosphere. Observations are compared and discussed with the output of a multi-year simulation performed with the Chemistry Climate Model EMAC (ECHAM5/MESSy Atmospheric Chemistry). The simulated stratospheric total chlorine amount is in accordance with the MIPAS-B/TELIS observation taking into account the fact that some chlorine source gases and very short lived species are not included in the model.

show abstract

Stratospheric isotopic water profiles from a single submillimeter limb scan by TELIS

Cited by 7 publications

References 32 publications

Partitioning and budget of inorganic and organic chlorine species observed by MIPAS-B and TELIS in the Arctic in March 2011

Partitioning and budget of inorganic and organic chlorine species observed by MIPAS-B and TELIS in the Arctic in March 2011

Performance Assessment of Balloon-Borne Trace Gas Sounding with the Terahertz Channel of TELIS

Partitioning and budget of inorganic and organic chlorine species observed by MIPAS-B and TELIS in the Arctic in March 2011

Contact Info

Product

Resources

About