Recent contrasting winter temperature changes over North America linked to enhanced positive Pacific‐North American pattern
dc.contributor.author | Liu, Zhongfang | en_US |
dc.contributor.author | Jian, Zhimin | en_US |
dc.contributor.author | Yoshimura, Kei | en_US |
dc.contributor.author | Buenning, Nikolaus H. | en_US |
dc.contributor.author | Poulsen, Christopher J. | en_US |
dc.contributor.author | Bowen, Gabriel J. | en_US |
dc.date.accessioned | 2015-11-12T21:04:10Z | |
dc.date.available | 2016-11-01T16:43:14Z | en |
dc.date.issued | 2015-09-28 | en_US |
dc.identifier.citation | Liu, Zhongfang; Jian, Zhimin; Yoshimura, Kei; Buenning, Nikolaus H.; Poulsen, Christopher J.; Bowen, Gabriel J. (2015). "Recent contrasting winter temperature changes over North America linked to enhanced positive Pacific‐North American pattern." Geophysical Research Letters 42(18): 7750-7757. | en_US |
dc.identifier.issn | 0094-8276 | en_US |
dc.identifier.issn | 1944-8007 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/115952 | |
dc.description.abstract | Recently enhanced contrasts in winter (December‐January‐February) mean temperatures and extremes (cold southeast and warm northwest) across North America have triggered intensive discussion both within and outside of the scientific community, but the mechanisms responsible for these contrasts remain unresolved. Here we use a combination of observations and reanalysis data sets to show that the strengthened contrasts in winter mean temperatures and extremes across North America are closely related to an enhancement of the positive Pacific‐North American (PNA) pattern during the second half of the 20th century. Recent intensification of positive PNA events is associated with amplified planetary waves over North America, driving cold‐air outbreaks into the southeast and warm tropical/subtropical air into the northwest. This not only results in a strengthened winter mean temperature contrast but increases the occurrence of the opposite‐signed extremes in these two regions.Key PointsThe enhanced contrasts in winter mean temperatures and extremes in North America are observedRecent enhancement of positive PNA is a main cause of the contrasting winter temperature changesThe study provides a framework for detection and attribution of climate change in North America | en_US |
dc.publisher | Wiley Periodicals, Inc. | en_US |
dc.subject.other | temperature trends | en_US |
dc.subject.other | temperature extremes | en_US |
dc.subject.other | spatial pattern | en_US |
dc.subject.other | Pacific and North American | en_US |
dc.subject.other | North America | en_US |
dc.title | Recent contrasting winter temperature changes over North America linked to enhanced positive Pacific‐North American pattern | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Geological Sciences | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/115952/1/grl53404_am.pdf | |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/115952/2/grl53404.pdf | |
dc.identifier.doi | 10.1002/2015GL065656 | en_US |
dc.identifier.source | Geophysical Research Letters | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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