08 Mar 2021

08 Mar 2021

Review status: this preprint is currently under review for the journal ESSD.

A mean-sea-level pressure time series for Trieste, Italy (1841–2018)

Fabio Raicich1 and Renato R. Colucci1,a Fabio Raicich and Renato R. Colucci
  • 1CNR, Institute of Marine Sciences, Trieste, I-34149, Italy
  • apresent address: CNR, Institute of Polar Sciences, Venice-Mestre, I-30172, Italy

Abstract. A time series of mean-sea-level pressure was built from observations performed in Trieste from 1 January 1841 to 31 December 2018. Original historical documents provided information on the instruments and on the observation sites. Mercury barometers have been always available. Until 1877 they represented the only instruments in operation, while from 1878 onwards barograph records became available. The time series consists of mean daily values, that were computed from 24 hourly data, when possible, or otherwise adjusted to 24-hr means on the basis of climatological daily pressure cycles. The time series was homogenized on the basis of the available metadata, reducing pressure to 0° C and to mean sea level. Basic quality checks were applied, including the comparison with pressure time series from nearby stations. As a result, the data prior to 1865 turned out to be suspect. A mean-sea-level pressure trend of 0.5 ± 0.2 hPa per century was estimated for the 1865–2018 period. The data are available through PANGAEA; Raicich and Colucci, 2021).

Fabio Raicich and Renato R. Colucci

Status: open (until 03 May 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-30', Philip Jones, 31 Mar 2021 reply
  • RC2: 'Comment on essd-2021-30', Anonymous Referee #2, 05 Apr 2021 reply

Fabio Raicich and Renato R. Colucci

Data sets

Mean-sea-level atmospheric pressure from 1841 to 2018 at Trieste, Italy F. Raicich and R. R. Colucci

Fabio Raicich and Renato R. Colucci


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Short summary
To understand climate change it is essential to analyse long time series of atmospheric data. Here we studied the atmospheric pressure observed at Trieste (Italy) from 1841 to 2018. We examined the available information on the characteristics and elevations of the barometers and on the data sampling. A basic data quality control was also applied. As a result, we built a homogeneous time series of daily mean pressures at the mean sea level, from which a trend of 0.5 hPa/century was estimated.