Relative impacts of sea ice loss and atmospheric internal variability on winter Arctic to East Asian surface air temperature based on large-ensemble simulations with NorESM2 ...

• Main Author: He, Shengping
• Format: Dataset
• Language: unknown
• Published: Zenodo 2023
• Subjects: Arctic; Norway; Sea ice
• Online Access: https://dx.doi.org/10.5281/zenodo.7961969; https://zenodo.org/record/7961969

There is no consensus as to whether the cooling trend and the frequent severe mid-latitude winters in the 1990s and 2000s are induced by the Arctic changes. One key factor in this respect is the relative impacts of Arctic sea ice loss (referred to as signal) and the atmospheric internal variability (sometimes behaving as noise). If the signal-to-noise ratio is low, the atmospheric internal variability can easily overwhelm the forced response to Arctic sea ice forcing. In this study, we use reanalysis datasets and three sets of large-ensemble simulations carried out by the Norwegian Earth System Model with a coupled atmosphere-land surface model, forced by seasonal sea ice conditions from preindustrial, present-day, and future periods. The objective is to quantify the relative contributions of Arctic sea ice and unforced atmospheric internal variability to “warm Arctic, cold East Asia” pattern in winters. The datasets used in this study include: (1)The reanalysis data is the European Centre for Medium-Range ... : This research was supported by the Chinese-Norwegian Collaboration Projects within Climate Systems jointly funded by the National Key Research and Development Program of China (Grant No. 2022YFE0106800) and the Research Council of Norway funded project MAPARC (grant No. 328943). We acknowledge the support from the Research Council of Norway funded project BASIC (grant No. 325440) and the Horizon 2020 project APPLICATE (Grant No. 727862). High-performance computing and storage resources were performed on resources provided by Sigma2 - the National Infrastructure for High Performance Computing and Data Storage in Norway (through projects NN2345K, NS2345K, NS9560K, NS9252K, and NS9034K). Thanks Dr Zachary Labe for sharing his research code: https://github.com/zmlabe/DetectMitigate/tree/main/Scripts ...