Entrainment of meltwaters in hyperpycnal flows during deglaciation superfloods in the Gulf of Mexico

Details Entrainment of meltwaters in hyperpycnal flows during deglaciation superfloods in the Gulf of Mexico Entrainment of meltwaters in hyperpycnal flows during deglaciation superfloods in the Gulf of Mexico

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006e%26psl.241..260a&link_type=abstract

Earth and Planetary Science Letters, Volume 241, Issue 1-2, p. 260-270.

Astronomy and Astrophysics

Astrophysics

12

Scientific paper

Northern Gulf of Mexico is a key archival site of the Laurentide Ice Sheet melting history and the only margins containing evidence of meltwater outflows contemporaneous with global meltwater pulse mwp-1A. Inconsistencies between these meltwater floods and the absence of strong climate responses to large freshwater fluxes predicted by climate models raised questions concerning the validity of planktonic foraminiferal δ18O record in the Gulf of Mexico as a reliable index of freshwater fluxes. Isotope records of depth-stratified foraminifera document unusual trends compatible with entrainment of 18O-depleted freshwaters in hyperpycnal flows reaching the seafloor and rising to the surface as buoyant plumes. These exceptionally large outbursts of floodwaters, coeval with a prominent erosion intensity peak in continental paleohydrology, were catastrophically released in a rapid succession over a period of ca. 500 yr (14.7-14.2 kyr). Correspondence in time and magnitude between the torrential floods and the mwp-1A event supports the view that LIS was likely a substantial freshwater source. Drainage of meltwaters through torrential hyperpycnal flows that underwent substantial mixing with seawater may resolve the problem with ocean modeling results that predict a much stronger climate response to large freshwater hypopycnal fluxes into the ocean.

Affiliated with

Also associated with

No associations

Rating

Entrainment of meltwaters in hyperpycnal flows during deglaciation superfloods in the Gulf of Mexico does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Entrainment of meltwaters in hyperpycnal flows during deglaciation superfloods in the Gulf of Mexico, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Entrainment of meltwaters in hyperpycnal flows during deglaciation superfloods in the Gulf of Mexico will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1203259