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Record #167700:

High-latitude influence on the eastern Pacific climate in the early Pleistocene epoch / Zhonghui Liu, Timothy D. Herbert.

Title: High-latitude influence on the eastern Pacific climate in the early Pleistocene epoch / Zhonghui Liu, Timothy D. Herbert.
Author(s): Liu, Zhonghui.
Herbert, Timothy D.
Date: 2004.
In: Nature. (2004.), Vol. 427(6976) (2004)
Abstract: Analyses alkenones from marine sediments in eastern equatorial Pacific (ODP site 846) to reconstruct sea surface temperatures (SSTs) and marine productivity over past 1.8 Myr. Notes many such tropical records exhibit cycles of 23-kyr (orbital precession) and 100-kyr during past 0.5 Myr, whereas high-latitude sea surface temperature records exhibit pronounced 41-kyr (orbital obliquity) cycles. Notes relatively unknown tropical climate variability before mid-Pleistocence transition about 900 kyr ago (marking change from climate dominated by 41-kyr cycles to more recent 100-kyr ice age cycles). Compares newly presented records of SST and marine productivity with local insolation and proxy ice volume records. Finds former dominated by 41-kyr obliquity cycles between 1.8 and 1.2 Myr ago, and early Pleistocene SSTs varying in opposite sense to local insolation. Since at low latitudes precessional (21-kyr) forcing dominates seasonal extremes and effects of obliquity on insolation are small, concludes climate at this tropical site during early Pleistocene was determined by obliquity driven processes at high-latitudes.
Notes:

Nature. Vol. 427(6976) :720-723 (2004).

Keywords: 551.461.8 -- Palaeo-oceanography.
551.58 -- Climatology.
551.583.3 -- Climatic changes, Quaternary.
551.465 -- Oceanography, dynamics.
551.338 -- Ice ages, theories of causation.
525.3 -- Earth, orbit and motions.
551.465.7 -- Oceanography, energy budget.
574.55 -- Productivity, aquatic ecology.
551.352/.353 -- Marine sediments, deep sea.
C -- Oceanography, hydrography and hydrology.
(265) -- Pacific Ocean.
SPRI record no.: 167700

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100 1# ‡aLiu, Zhonghui.
245 10 ‡aHigh-latitude influence on the eastern Pacific climate in the early Pleistocene epoch /‡cZhonghui Liu, Timothy D. Herbert.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2004.
300 ## ‡ap. 720-723 :‡bdiags.
500 ## ‡aNature. Vol. 427(6976) :720-723 (2004).
520 3# ‡aAnalyses alkenones from marine sediments in eastern equatorial Pacific (ODP site 846) to reconstruct sea surface temperatures (SSTs) and marine productivity over past 1.8 Myr. Notes many such tropical records exhibit cycles of 23-kyr (orbital precession) and 100-kyr during past 0.5 Myr, whereas high-latitude sea surface temperature records exhibit pronounced 41-kyr (orbital obliquity) cycles. Notes relatively unknown tropical climate variability before mid-Pleistocence transition about 900 kyr ago (marking change from climate dominated by 41-kyr cycles to more recent 100-kyr ice age cycles). Compares newly presented records of SST and marine productivity with local insolation and proxy ice volume records. Finds former dominated by 41-kyr obliquity cycles between 1.8 and 1.2 Myr ago, and early Pleistocene SSTs varying in opposite sense to local insolation. Since at low latitudes precessional (21-kyr) forcing dominates seasonal extremes and effects of obliquity on insolation are small, concludes climate at this tropical site during early Pleistocene was determined by obliquity driven processes at high-latitudes.
530 ## ‡aAlso issued online ‡uurn:doi:10.1038/nature02338‡uhttps://dx.doi.org/10.1038/nature02338
650 07 ‡a551.461.8 -- Palaeo-oceanography.‡2udc
650 07 ‡a551.58 -- Climatology.‡2udc
650 07 ‡a551.583.3 -- Climatic changes, Quaternary.‡2udc
650 07 ‡a551.465 -- Oceanography, dynamics.‡2udc
650 07 ‡a551.338 -- Ice ages, theories of causation.‡2udc
650 07 ‡a525.3 -- Earth, orbit and motions.‡2udc
650 07 ‡a551.465.7 -- Oceanography, energy budget.‡2udc
650 07 ‡a574.55 -- Productivity, aquatic ecology.‡2udc
650 07 ‡a551.352/.353 -- Marine sediments, deep sea.‡2udc
650 07 ‡aC -- Oceanography, hydrography and hydrology.‡2local
651 #7 ‡a(265) -- Pacific Ocean.‡2udc
700 1# ‡aHerbert, Timothy D.
773 0# ‡7nnas ‡tNature. ‡gVol. 427(6976) (2004) ‡wSPRI-1046
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