EGU2020-9281, updated on 12 Jun 2020
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Modulation of PDO in the Arctic tropospheric warming

Lingling Suo1, Yongqi Gao1, Guillaume Gastineau2, Yu-Chiao Liang3, Rohit Ghosh4, Tian Tian5, and Ying Zhang6
Lingling Suo et al.
  • 1Nansen Environmental and Remote Sensing Center, Bergen, Norway
  • 2Sorbonne Université, CNRS/IRD/MNHN, UMR LOCEAN, Paris, France
  • 3Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, U.S.A.
  • 4Max Planck Institute for Meteorology, Hamburg, Germany
  • 5Danish Meteorological Institute, Copenhagen, Denmark
  • 6Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, People's Republic of China

The Arctic amplified warming under global warming is one of the prominent climate change events during the past several decades. Arctic sea ice retreat contributed the majority of the near-surface warming, and little to the mid-troposphere warming. The remote factors might contribute to or modulate the aloft Arctic warming.

Here we performed a multi-model joint-analysis to study the role of the Pacific decadal oscillation, which is one of the most important recurring ocean-atmosphere variability in the climate system, in the tropospheric Arctic warming. In the multi-model simulation, PDO reduced the Arctic warming trend during 1979-2013 significantly in spring, Autumn and early winter season from the near-surface to the upper troposphere. The reduction of warming reaches 0.3 / 0.2 °C per decade in the upper / lower troposphere.

How to cite: Suo, L., Gao, Y., Gastineau, G., Liang, Y.-C., Ghosh, R., Tian, T., and Zhang, Y.: Modulation of PDO in the Arctic tropospheric warming, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-9281,, 2020