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|a The recent shift in early summer Arctic atmospheric circulation |h [electronic resource]. |
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|a [S.l.] : |b American Geophysical Union, |c 2012. |
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|a Geophysical Research Letters Volume 39. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a The last six years (2007–2012) show a persistent
change in early summer Arctic wind patterns relative to
previous decades. The persistent pattern, which has been
previously recognized as the Arctic Dipole (AD), is characterized
by relatively low sea-level pressure over the
Siberian Arctic with high pressure over the Beaufort Sea,
extending across northern North America and over Greenland.
Pressure differences peak in June. In a search for a
proximate cause for the newly persistent AD pattern, we
note that the composite 700 hPa geopotential height field
during June 2007–2012 exhibits a positive anomaly only on
the North American side of the Arctic, thus creating the
enhanced mean meridional flow across the Arctic. Coupled
impacts of the new persistent pattern are increased sea ice
loss in summer, long-lived positive temperature anomalies
and ice sheet loss in west Greenland, and a possible
increase in Arctic-subarctic weather linkages through higheramplitude
upper-level flow. The North American location
of increased 700 hPa positive anomalies suggests that a
regional atmospheric blocking mechanism is responsible for
the presence of the AD pattern, consistent with observations
of unprecedented high pressure anomalies over Greenland
since 2007. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a atmospheric circulation. |
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|t The recent shift in early summer Arctic atmospheric circulation |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15050374/00001 |y Click here for full text |
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|3 FULL TEXT- The recent shift in early summer Arctic atmospheric circulation |u http://onlinelibrary.wiley.com/doi/10.1029/2012GL053268/abstract |y The recent shift in early summer Arctic atmospheric circulation |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/05/03/74/00001/FI15050374_thm.jpg |
