Net precipitation of Antarctica: thermodynamical and dynamical parts of the climate change signal

Jens Grieger, Gregor C. Leckebusch, Uwe Ulbrich

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11 Citations (Scopus)
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Abstract

This paper investigates climate change signals of Southern Hemisphere (SH) moisture flux simulated by three members of one CMIP3 coupled atmosphere-ocean general circulation model (AOGCM) and a multi-model ensemble of CMIP5 simulations. Generally, flux changes are dominated by increased atmospheric moisture in the atmosphere due to temperature increase in the future climate projections. An approach is presented to distinguish between thermodynamical and dynamical influences on moisture flux. Furthermore, a physical interpretation of the transport changes due to dynamics is investigated by decomposing atmospheric waves into different length scales and temporal variations. Signals of moisture flux are compared with fluctuations of geopotential height fields as well as climate signals of extra-tropical cyclones. Moisture flux variability in the synoptic length scale with temporal variations shorter than 8 days can be assigned to the SH storm track. Climate change signals of these atmospheric waves sh...
Original languageEnglish
Pages (from-to)907-924
Number of pages18
JournalJournal of Climate
Volume29
Issue number3
DOIs
Publication statusPublished - 1 Feb 2016

Keywords

  • Antarctica
  • Circulation/Dynamics
  • Climate change
  • Extratropical cyclones
  • Geographic location/entity
  • Hydrologic cycle
  • Physical Meteorology and Climatology

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