The 16th International Conference on Accelerator Mass Spectrometry

Imprint of stratosphere-troposphere-exchange on 10Be deposition in Greenland and Antarctica ice cores

PSA-11

21 Oct 2024, 17:35

20m

Lobby and Hallway , 2nd Floor (( Poster session A should be set up in the morning.))

Poster Applications in Climate Studies Poster Session A

Speaker

Minjie Zheng (Lund University)

Description

The 10Be record from the Northern Greenland NEEM ice core has been found to significantly correlate with the mid-latitude tropopause pressure on both seasonal and annual scales, highlighting the potential of applying ice core 10Be records to study the past stratosphere-troposphere exchange at mid-latitudes. However, a comprehensive study is required to determine if this relationship holds for 10Be records from other ice cores in Greenland and Antarctica. In this study, we review the available high-resolution 10Be records from Greenland and Antarctica over the last hundred years, finding that most of these records show significant correlations with mid-latitude tropopause pressure. However, the 10Be composite records from Greenland or Antarctica could not strengthen this relationship, suggesting different transport pathways to the different ice core locations in polar region. Finally, we discuss the potential of using solar storm events as "natural experiments" to investigate past stratosphere-troposphere exchange.