Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 4.713
IF4.713
IF 5-year value: 4.927
IF 5-year
4.927
CiteScore value: 8.0
CiteScore
8.0
SNIP value: 1.425
SNIP1.425
IPP value: 4.65
IPP4.65
SJR value: 2.353
SJR2.353
Scimago H <br class='widget-line-break'>index value: 71
Scimago H
index
71
h5-index value: 53
h5-index53
Preprints
https://doi.org/10.5194/tc-2020-302
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2020-302
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  27 Oct 2020

27 Oct 2020

Review status
This preprint is currently under review for the journal TC.

Continuous monitoring of surface water vapour isotopic compositions at Neumayer Station III, East Antarctica

Saeid Bagheri Dastgerdi1, Melanie Behrens1, Jean-Louis Bonne1, Maria Hörhold1, Gerrit Lohmann1, Elisabeth Schlosser2,3, and Martin Werner1 Saeid Bagheri Dastgerdi et al.
  • 1Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany
  • 2Department of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
  • 3Austrian Polar Research Institute, Vienna, Austria

Abstract. In this study, the first fully-continuous monitoring of water vapour isotopic composition at Neumayer Station III, Antarctica, during the two-year period from February 2017 to January 2019 is presented. Seasonal and synoptic-scale variations of both stable water isotopes H218O and HDO are reported, and their link to variations of key meteorological variables are analysed. Changes in local temperature and humidity are the main drivers for the variability of δO18 and δD in vapour at Neumayer Station III, both on seasonal and shorter time scales. In contrast to the measured δO18 and δD variations, no seasonal cycle in the Deuterium excess signal d–excess in vapour is detected. However, a rather high uncertainty of measured d–excess values especially in austral winter limits the confidence of this finding. Overall, the d–excess signal shows a stronger inverse correlation with humidity than with temperature, and this inverse correlation between d–excess and humidity is stronger for the cloudy-sky conditions than for clear-sky conditions during summertime. Back trajectory simulations performed with the FLEXPART model show that seasonal and synoptic variations of δO18 and δD in vapour coincide with changes in the main sources of water vapour transported to Neumayer Station. In general, moisture transport pathways from the east lead to higher temperatures and more enriched δO18 values in vapour, while weather situations with southerly winds lead to lower temperatures and more depleted δO18 values. However, for several occasions, δO18 variations linked to wind direction changes were observed, which were not accompanied by a corresponding temperature change. Comparing isotopic compositions of water vapour at Neumayer Station III and snow samples taken in the vicinity of the station reveals almost identical slopes, both for the δO18–δD relation and for the temperature–δO18 relation.

Saeid Bagheri Dastgerdi et al.

Interactive discussion

Status: open (until 24 Dec 2020)
Status: open (until 24 Dec 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Saeid Bagheri Dastgerdi et al.

Saeid Bagheri Dastgerdi et al.

Viewed

Total article views: 177 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
145 30 2 177 1 1
  • HTML: 145
  • PDF: 30
  • XML: 2
  • Total: 177
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 27 Oct 2020)
Cumulative views and downloads (calculated since 27 Oct 2020)

Viewed (geographical distribution)

Total article views: 173 (including HTML, PDF, and XML) Thereof 172 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 03 Dec 2020
Publications Copernicus
Download
Citation