Mid-Holocene NAO: A PMIP2 model intercomparison

R. M. Gladstone; I. Ross; P. J. Valdes; A. Abe-Ouchi; P. Braconnot; S. Brewer; M. Kageyama; A. Kitoh; A. Legrande; O. Marti; R. Ohgaito; B. Otto-Bliesner; W. R. Peltier; G. Vettoretti

doi:10.1029/2005GL023596

Mid-Holocene NAO: A PMIP2 model intercomparison

R. M. Gladstone, I. Ross, P. J. Valdes, A. Abe-Ouchi, P. Braconnot, S. Brewer, M. Kageyama, A. Kitoh, A. Legrande, O. Marti, R. Ohgaito, B. Otto-Bliesner, W. R. Peltier, G. Vettoretti

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The mid-Holocene (6000 years before present) North Atantic Oscillation (NAO) from nine models in the Paleoclimate Modeling Intercomparison Project Phase 2 is studied, primarily through principal component analysis of winter time North Atlantic sea level pressure (SLP). Modeled mid-Holocene NAO and mean SLP show small changes compared to pre-industrial control runs, with a shift in mean state towards a more positive NAO regime for three of the models. Modeled NAO variability shows little change, with a small increase for some models in the fraction of time spent in the NAO-negative phase during the mid-Holocene. Proxy based reconstructions of the NAO indicate a more positive NAO regime compared to present day during the mid- Holocene. We hypothesise that there was a small NAO+ like shift in mean state during the mid-Holocene.

Alkuperäiskieli	englanti
Artikkeli	L16707
Sivut	1-4
Sivumäärä	4
Julkaisu	Geophysical Research Letters
Vuosikerta	32
Numero	16
DOI - pysyväislinkit	https://doi.org/10.1029/2005GL023596
Tila	Julkaistu - 28 elok. 2005
OKM-julkaisutyyppi	A1 Vertaisarvioitu alkuperäisartikkeli

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10.1029/2005GL023596

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@article{3947b3dc3fc247bd8373994b06845e60,

title = "Mid-Holocene NAO: A PMIP2 model intercomparison",

abstract = "The mid-Holocene (6000 years before present) North Atantic Oscillation (NAO) from nine models in the Paleoclimate Modeling Intercomparison Project Phase 2 is studied, primarily through principal component analysis of winter time North Atlantic sea level pressure (SLP). Modeled mid-Holocene NAO and mean SLP show small changes compared to pre-industrial control runs, with a shift in mean state towards a more positive NAO regime for three of the models. Modeled NAO variability shows little change, with a small increase for some models in the fraction of time spent in the NAO-negative phase during the mid-Holocene. Proxy based reconstructions of the NAO indicate a more positive NAO regime compared to present day during the mid- Holocene. We hypothesise that there was a small NAO+ like shift in mean state during the mid-Holocene.",

author = "Gladstone, {R. M.} and I. Ross and Valdes, {P. J.} and A. Abe-Ouchi and P. Braconnot and S. Brewer and M. Kageyama and A. Kitoh and A. Legrande and O. Marti and R. Ohgaito and B. Otto-Bliesner and Peltier, {W. R.} and G. Vettoretti",

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doi = "10.1029/2005GL023596",

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T2 - A PMIP2 model intercomparison

AU - Gladstone, R. M.

AU - Ross, I.

AU - Valdes, P. J.

AU - Abe-Ouchi, A.

AU - Braconnot, P.

AU - Brewer, S.

AU - Kageyama, M.

AU - Kitoh, A.

AU - Legrande, A.

AU - Marti, O.

AU - Ohgaito, R.

AU - Otto-Bliesner, B.

AU - Peltier, W. R.

AU - Vettoretti, G.

PY - 2005/8/28

Y1 - 2005/8/28

N2 - The mid-Holocene (6000 years before present) North Atantic Oscillation (NAO) from nine models in the Paleoclimate Modeling Intercomparison Project Phase 2 is studied, primarily through principal component analysis of winter time North Atlantic sea level pressure (SLP). Modeled mid-Holocene NAO and mean SLP show small changes compared to pre-industrial control runs, with a shift in mean state towards a more positive NAO regime for three of the models. Modeled NAO variability shows little change, with a small increase for some models in the fraction of time spent in the NAO-negative phase during the mid-Holocene. Proxy based reconstructions of the NAO indicate a more positive NAO regime compared to present day during the mid- Holocene. We hypothesise that there was a small NAO+ like shift in mean state during the mid-Holocene.

AB - The mid-Holocene (6000 years before present) North Atantic Oscillation (NAO) from nine models in the Paleoclimate Modeling Intercomparison Project Phase 2 is studied, primarily through principal component analysis of winter time North Atlantic sea level pressure (SLP). Modeled mid-Holocene NAO and mean SLP show small changes compared to pre-industrial control runs, with a shift in mean state towards a more positive NAO regime for three of the models. Modeled NAO variability shows little change, with a small increase for some models in the fraction of time spent in the NAO-negative phase during the mid-Holocene. Proxy based reconstructions of the NAO indicate a more positive NAO regime compared to present day during the mid- Holocene. We hypothesise that there was a small NAO+ like shift in mean state during the mid-Holocene.

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Mid-Holocene NAO: A PMIP2 model intercomparison

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