High Atlantic Goni2006

Core/Site name:

MC-4

Country/Region:

Cariaco Basin

Elevation:

-432

Archive:

marine sediments (coretop)

Proxy measurement:

alkenones

Sampling resolution:

biennial

Startyear:

1694 AD

Endyear:

1996 AD

Description:

Analysis of sediments from two wind-driven upwelling systems, Guaymas and Cariaco basins, using the alkenonebased U37 paleothermometer yielded high-resolution records of sea surface temperatures (SST) from 1700 to 2000 AD. The trends in the U37index reveal steady SST increases of 1 to 2C at both sites since the end of the Little Ice Age. Higher-frequency changes in SST indicate a decoupling in the relative intensity of wind-driven upwelling at the two sites. Periods of enhanced upwelling in Guaymas correspond to periods of decreased upwellingin Cariaco (and vice versa). We propose that these contrasts reflect regional differences in the upwelling response of upwelling to changes in the positioning of the Inter-Tropical Convergence Zone (ITCZ) and the Subtropical High (SH)under current climate conditions.

Data entered by name:

Martrat, Belen

Data entered by email:

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Main reference(s):

Goni, M. A., R. C. Thunell, M. P. Woodwort, and F. E. Müller-Karger (2006), Changes in wind-driven upwelling during the last three centuries: Interocean teleconnections, Geophysical Research Letters, 33(15), L15604.

Link to reference 1:

http://onlinelibrary.wiley.com/doi/10.1029/2006GL026415/full

Data storage link 1:

http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:1865741593770625::::P1_STUDY_ID:13541

Current dating method:

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Annual snow acc rate:

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Category: Ocean2k