Mechanism and prediction of the new Arctic climate system


The primary objective of MAPARC is to achieve better predictions of the new Arctic climate system considering a new vision of climate change and predictability. We will achieve this goal via addressing specific objectives:

(1) to identify the causes and impacts of the present and future increasing newly-formed sea ice and the shallow and deep Arctic ocean and atmosphere warming;

(2) to determine the mechanism of the change in atmospheric circulation regimes and their impacts on extreme weather and climate;

(3) then to develop new prediction methods and models to improve the skill and reliability of seasonal climate prediction at mid-high latitudes.

Project Summary

Arctic is entering into a new era where there is more open ocean in summer and increasing area of newly-formed sea ice in winter. Meanwhile, the new Arctic is undergoing a deep warming extending from the interior ocean to the upper troposphere. It implies significant changes of ocean conditions, atmosphere circulations and climate patterns, bringing challenges to the implementation of existing knowledge on the prediction of new Arctic climate system.

MAPARC aims to enhance the mechanistic understanding of Arctic climate change and improve the prediction of new Arctic climate system. We will quantify the observed changes of Arctic air-sea-ice interaction due to the increased area of newly-formed sea ice, and use state-of-the-art coupled climate model and regional atmospheric model to confirm the underlying thermodynamic feedbacks. Existing multi-model large ensemble climate simulations will be used to identify the local and remote processes responsible for the Arctic near-surface warming and deep warming and their downstream effects (e.g., extremes over Eurasia). We will then use the Norwegian Earth System Model and modern techniques such as causal effect networks to confirm the causality of climate linkages. We will further use the large ensemble simulations to assess the effects of externally-forced (e.g., radiative forcing), boundary forcing (e.g., sea ice and ocean temperature) and internal stochastic forcing on the changes of mid-high latitude atmospheric circulations such as stratospheric polar vortex, jet stream and blocking. Equipped with enhanced mechanistic understanding, we will then use the dynamical climate prediction systems and advanced approaches including statistical downscaling and machine learning to develop hybrid models for the prediction of new Arctic climate system. The well-established collaboration between the Norwegian and Chinese PIs and the complementary expertise and technology of the project group will ensure the success of MAPARC.

Project Details
Funding Agency: 
Research Council of Norway
NERSC Principal Investigator: 
Helene R. Langehaug
Coordinating Institute: 
Geophysical Institute, University of Bergen
Project Status: