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Seasonal variability in Northern Hemisphere atmospheric circulation during the Medieval Climate Anomaly and the Little Ice Age

Edwards, Thomas W. D.; Hammarlund, Dan LU ; Newton, Brandi W.; Sjolte, Jesper LU ; Linderson, Hans LU ; Sturm, Christophe; St Amour, Natalie A.; Bailey, Joscelyn N.L. and Nilsson, Anders L. (2017) In Quaternary Science Reviews 165. p.102-110
Abstract

Here we report new reconstructions of winter temperature and summer moisture during the past millennium in southeastern Sweden, based on stable-isotope data from a composite tree-ring sequence, that further enhances our knowledge and understanding of seasonal climate variability in the Northern Hemisphere over the past millennium. Key features of these new climate proxy records include evidence for distinctive fluctuations in winter temperature in SE Sweden, superimposed upon the general pattern of cooling between the so-called Medieval Climate Anomaly (MCA) of the early millennium and the Little Ice Age (LIA) of the late millennium, as well as evidence for sustained summer wetness during the MCA, followed by drier and less variable... (More)

Here we report new reconstructions of winter temperature and summer moisture during the past millennium in southeastern Sweden, based on stable-isotope data from a composite tree-ring sequence, that further enhances our knowledge and understanding of seasonal climate variability in the Northern Hemisphere over the past millennium. Key features of these new climate proxy records include evidence for distinctive fluctuations in winter temperature in SE Sweden, superimposed upon the general pattern of cooling between the so-called Medieval Climate Anomaly (MCA) of the early millennium and the Little Ice Age (LIA) of the late millennium, as well as evidence for sustained summer wetness during the MCA, followed by drier and less variable conditions during the LIA. We also explore these new records within a circumpolar spatial context by employing self-organizing map analysis of meteorological reanalysis data to identify potential modern analogues of mid-tropospheric synoptic circulation types in the Northern Hemisphere extratropics that can reconcile varying seasonal climate states during the MCA and LIA in SE Sweden with less variable conditions in southwestern Canada, as portrayed by paleoclimate records developed in the same manner in an earlier study.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Arctic Oscillation, Late Holocene, North Atlantic Oscillation, Northern Hemisphere extratropics, Paleoclimatology, Self-organizing maps, Stable isotopes, Synoptic circulation
in
Quaternary Science Reviews
volume
165
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85018306542
  • wos:000402946900008
ISSN
0277-3791
DOI
10.1016/j.quascirev.2017.04.018
language
English
LU publication?
yes
id
c3be6701-cb2d-45f7-8a33-54b6f2547375
date added to LUP
2017-05-17 13:25:12
date last changed
2018-06-24 05:13:06
@article{c3be6701-cb2d-45f7-8a33-54b6f2547375,
  abstract     = {<p>Here we report new reconstructions of winter temperature and summer moisture during the past millennium in southeastern Sweden, based on stable-isotope data from a composite tree-ring sequence, that further enhances our knowledge and understanding of seasonal climate variability in the Northern Hemisphere over the past millennium. Key features of these new climate proxy records include evidence for distinctive fluctuations in winter temperature in SE Sweden, superimposed upon the general pattern of cooling between the so-called Medieval Climate Anomaly (MCA) of the early millennium and the Little Ice Age (LIA) of the late millennium, as well as evidence for sustained summer wetness during the MCA, followed by drier and less variable conditions during the LIA. We also explore these new records within a circumpolar spatial context by employing self-organizing map analysis of meteorological reanalysis data to identify potential modern analogues of mid-tropospheric synoptic circulation types in the Northern Hemisphere extratropics that can reconcile varying seasonal climate states during the MCA and LIA in SE Sweden with less variable conditions in southwestern Canada, as portrayed by paleoclimate records developed in the same manner in an earlier study.</p>},
  author       = {Edwards, Thomas W. D. and Hammarlund, Dan and Newton, Brandi W. and Sjolte, Jesper and Linderson, Hans and Sturm, Christophe and St Amour, Natalie A. and Bailey, Joscelyn N.L. and Nilsson, Anders L.},
  issn         = {0277-3791},
  keyword      = {Arctic Oscillation,Late Holocene,North Atlantic Oscillation,Northern Hemisphere extratropics,Paleoclimatology,Self-organizing maps,Stable isotopes,Synoptic circulation},
  language     = {eng},
  month        = {06},
  pages        = {102--110},
  publisher    = {Elsevier},
  series       = {Quaternary Science Reviews},
  title        = {Seasonal variability in Northern Hemisphere atmospheric circulation during the Medieval Climate Anomaly and the Little Ice Age},
  url          = {http://dx.doi.org/10.1016/j.quascirev.2017.04.018},
  volume       = {165},
  year         = {2017},
}