OVERVIEW

• Main Author: Arnd Bernaerts
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic; Daly; Johannessen; North Atlantic; North Atlantic oscillation
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.4143; http://www.arctic-warming.com/conference_paper_PACON.pdf

Recent conclusion on the arctic warming in the 1920s/1930s: 1. Natural fluctuations are a component of the climatic system (Johannessen et.al., 2004); 2. Natural variability is the most likely cause (Bengtsson et al., 2004); 3. Sun has partly caused the warming (Daly, 2004); 4. The 1930s warm period did not coincide with a positive phase of the NAO (North Atlantic Oscillation) (.Polyakov et al., 2004). The latest IPCC’s Summary for Policymakers (IPCC 2007) paid little attention to the previous statements and summarised the ‘arctic warming ’ as it follows: Average Arctic temperatures increased at almost twice the global average rate in the past 100 years. Arctic temperatures have high decadal variability, and a warm period was also observed from 1925 to 1945. One century has passed since arctic warming started in the late 1910s, but science is still unable to give a consistent explanation of the warming causes and origins. This investigation attempts to offer clues and explanations about what caused the arctic warming at the beginning of the last century. However, as a Conference paper, it is actually only a brief summary of a more detailed work, which is fully accessible at