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Record #172353:

How the isthmus of Panama put ice into the Arctic / Gerald H. Haug, Ralf Tidemann, Lloyd D. Keigwin.

Title: How the isthmus of Panama put ice into the Arctic / Gerald H. Haug, Ralf Tidemann, Lloyd D. Keigwin.
Author(s): Haug, Gerald H.
Tidemann, Ralf.
Keigwin, Lloyd D.
Date: 2004.
In: Oceanus. (2004.), Vol. 42(2) (2004)
Abstract: Examines role of ocean circulation in onset of extensive Northern Hemisphere glaciation 3.1 to 2.7 Myr ago. Contrasts with Antarctic onset 34 Myr ago. Links northern changes to Panama isthmus formation, establishment of Atlantic/Pacific salinity contrast and "ocean conveyor". This initially supplied more carbon dioxide to sub-Arctic Pacific than was taken up by phytoplankton. Resulting atmospheric CO² increase caused Mid Pliocene "greenhouse" warming. Later, moisture carried via Gulf stream to North Atlantic and deposited in Eurasia encouraged sea ice formation on reaching Arctic Ocean. Increased Arctic albedo and blocking of ocean-atmosphere heat exchange encouraged cooling, and flow of warmer less saline Arctic waters into North Atlantic weakened conveyor, discouraging northerly heat transport. Tilting of Earth axis tipped balance in favour of glaciation. Sub-Arctic halocline that was established prevented upwelling, causing further cooling.
Notes:

Oceanus. Vol. 42(2) :95-98 (2004).

Keywords: 551.46 -- Oceanography, physical.
551.32 -- Glaciology.
551.58 -- Climatology.
551.583.7 -- Palaeoclimatology.
551.338 -- Ice ages, theories of causation.
551.782.2 -- Pliocene.
551.326 -- Floating ice.
551.465 -- Oceanography, dynamics.
551.463.6 -- Sea water, thermal properties and heat flux.
551.464.5 -- Salinity.
551.465.45 -- Water masses.
551.465.7 -- Oceanography, energy budget.
525.3 -- Earth, orbit and motions.
546.264-31 -- Carbon dioxide.
C -- Oceanography, hydrography and hydrology.
(*1) -- World.
(26) -- Oceans.
(*7) -- Antarctic regions.
(*60) -- Arctic Ocean and adjacent waters.
(*61) -- North Atlantic Ocean.
(265) -- Pacific Ocean.
SPRI record no.: 172353

MARCXML

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100 1# ‡aHaug, Gerald H.
245 10 ‡aHow the isthmus of Panama put ice into the Arctic /‡cGerald H. Haug, Ralf Tidemann, Lloyd D. Keigwin.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2004.
300 ## ‡ap. 95-98 :‡bdiags.
500 ## ‡aOceanus. Vol. 42(2) :95-98 (2004).
520 3# ‡aExamines role of ocean circulation in onset of extensive Northern Hemisphere glaciation 3.1 to 2.7 Myr ago. Contrasts with Antarctic onset 34 Myr ago. Links northern changes to Panama isthmus formation, establishment of Atlantic/Pacific salinity contrast and "ocean conveyor". This initially supplied more carbon dioxide to sub-Arctic Pacific than was taken up by phytoplankton. Resulting atmospheric CO² increase caused Mid Pliocene "greenhouse" warming. Later, moisture carried via Gulf stream to North Atlantic and deposited in Eurasia encouraged sea ice formation on reaching Arctic Ocean. Increased Arctic albedo and blocking of ocean-atmosphere heat exchange encouraged cooling, and flow of warmer less saline Arctic waters into North Atlantic weakened conveyor, discouraging northerly heat transport. Tilting of Earth axis tipped balance in favour of glaciation. Sub-Arctic halocline that was established prevented upwelling, causing further cooling.
650 07 ‡a551.46 -- Oceanography, physical.‡2udc
650 07 ‡a551.32 -- Glaciology.‡2udc
650 07 ‡a551.58 -- Climatology.‡2udc
650 07 ‡a551.583.7 -- Palaeoclimatology.‡2udc
650 07 ‡a551.338 -- Ice ages, theories of causation.‡2udc
650 07 ‡a551.782.2 -- Pliocene.‡2udc
650 07 ‡a551.326 -- Floating ice.‡2udc
650 07 ‡a551.465 -- Oceanography, dynamics.‡2udc
650 07 ‡a551.463.6 -- Sea water, thermal properties and heat flux.‡2udc
650 07 ‡a551.464.5 -- Salinity.‡2udc
650 07 ‡a551.465.45 -- Water masses.‡2udc
650 07 ‡a551.465.7 -- Oceanography, energy budget.‡2udc
650 07 ‡a525.3 -- Earth, orbit and motions.‡2udc
650 07 ‡a546.264-31 -- Carbon dioxide.‡2udc
650 07 ‡aC -- Oceanography, hydrography and hydrology.‡2local
651 #7 ‡a(*1) -- World.‡2udc
651 #7 ‡a(26) -- Oceans.‡2udc
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*60) -- Arctic Ocean and adjacent waters.‡2udc
651 #7 ‡a(*61) -- North Atlantic Ocean.‡2udc
651 #7 ‡a(265) -- Pacific Ocean.‡2udc
700 1# ‡aTidemann, Ralf.
700 1# ‡aKeigwin, Lloyd D.
773 0# ‡7nnas ‡tOceanus. ‡gVol. 42(2) (2004) ‡wSPRI-90241
916 ## ‡a2005/06/10 -- RF
917 ## ‡aUnenhanced record from Muscat, imported 2019
948 3# ‡a20220924 ‡bRF