Publication Date:
2018-04-30
Description:
The Arctic has warmed more than twice as fast as the global average since the mid 20th century,
a phenomenon known as Arctic amplification (AA). These profound changes to the Arctic system
have coincided with a period of ostensibly more frequent events of extreme weather across the
Northern Hemisphere (NH) mid-latitudes, including extreme heat and rainfall events and recent
severe winters. Though winter temperatures have generally warmed since 1960 over mid-to-high
latitudes, the acceleration in the rate of warming at high-latitudes, relative to the rest of the NH,
started approximately in 1990. Trends since 1990 show cooling over the NH continents, especially
in Northern Eurasia.
The possible link between Arctic change and mid-latitude climate and weather has spurred a rush
of new observational and modeling studies. A number of workshops held during 2013-2014 have
helped frame the problem and have called for continuing and enhancing efforts for improving
our understanding of Arctic-mid-latitude linkages and its attribution to the occurrence of extreme
climate and weather events. Although these workshops have outlined some of the major challenges
and provided broad recommendations, further efforts are needed to synthesize the diversified
research results to identify where community consensus and gaps exist.
Building upon findings and recommendations of the previous workshops, the US CLIVAR Working
Group on Arctic Change and Possible Influence on Mid-latitude Climate and Weather convened an
international workshop at Georgetown University in Washington, DC, on February 1-3, 2017. Experts
in the fields of atmosphere, ocean, and cryosphere sciences assembled to assess the rapidly evolving
state of understanding, identify consensus on knowledge and gaps in research, and develop specific
actions to accelerate progress within the research community. With more than 100 participants,
the workshop was the largest and most comprehensive gathering of climate scientists to address
the topic to date. In this white paper, we synthesize and discuss outcomes from this workshop and
activities involving many of the working group members.
Repository Name:
EPIC Alfred Wegener Institut
Type:
Book
,
peerRev
Format:
application/pdf
Permalink
