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

Navas Guzman, Francisco Jesus; Kämpfer, Niklaus; Schranz, Franziska; Steinbrecht, Wolfgang; Haefele, Alexander (2017). Intercomparison of stratospheric temperature profiles from a ground-based microwave radiometer with other techniques. Atmospheric chemistry and physics, 17(22), pp. 14085-14104. European Geosciences Union 10.5194/acp-17-14085-2017

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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 TEMPERA 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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Microwaves

UniBE Contributor:

Navas Guzman, Francisco Jesus; Kämpfer, Niklaus; Schranz, Franziska and Haefele, Alexander

Subjects:

600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

1680-7316

Publisher:

European Geosciences Union

Language:

English

Submitter:

Franziska Stämpfli

Date Deposited:

14 Jun 2018 14:44

Last Modified:

14 Jun 2018 14:44

Publisher DOI:

10.5194/acp-17-14085-2017

BORIS DOI:

10.7892/boris.114735

URI:

https://boris.unibe.ch/id/eprint/114735

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