Changes in Barents Sea ice Edge Positions in the Last 440 years: A Review of Possible Driving Forces

• 作者: Jan-Erik Solheim Nils-Axel Mö Ole Humlum rner Stig Falk-Petersen
• 来源期刊: 天文学与天体物理学国际期刊(英文)
• 学科: 地球科学
• 关键词: Barents Sea Ice Edge Cyclic Changes Gulf Stream Beat Planetary-Solar Forcing
• 年，卷（期）: 2020,（2）
• 页码范围: 97-164
• 页数: 68页
• 分类号: P31

摘要

This is the first report of the Barents Sea Ice Edge (BIE) project. The BIE position has varied between latitude 76<span style="white-space:nowrap;">&deg;</span>N and above 82<span style="white-space:nowrap;">&deg;</span>N during the last 440 years. During the period 10,000 to 6000 years ago, Arctic climate was significantly warmer than today. We review various oceanic and atmospheric factors that may have an effect on the BIE position. The Gulf Stream beat with respect to alternations in flow intensity and N-S distribution plays a central role for the changes in climate and BIE position during the last millennium. This occurred in combination with external forcing from total solar irradiation, Earth’s shielding strength, Earth’s geomagnetic field intensity, Earth’s rotation, jet stream changes;all factors of which are ultimately driven by the planetary beat on the Sun, the Earth and the Earth-Moon system. During the last 20 years, we see signs of changes and shifts that may signal the end of the late 20^th century warm period. The BIE position is likely to start advancing southward in next decade.