High Indian native Felis-1

Core/Site name:

N. Gulf of Aqaba (AQ2)

Country/Region:

Jordon

Elevation:

-18

Archive:

corals

Species:

Porites

Proxy measurement:

Sr/Ca; d18O

Sampling resolution:

seasonal

Startyear:

1991 AD

Endyear:

1996 AD

Description:

EILAT-15B; 1988-1995 yr AD AQ2; 1991-1996 yr AD EILAT-1; 1988-1993 yr AD Fossil Corals: AQB-10-B; 98 years around 2910 cal. yr BP AQB-3-A; 44 years around 121.9 kyr ago Northern Gulf of Aqaba bimonthly coral oxygen isotope and Sr/Ca data of modern and fossil Porites colonies from the northernmost Red Sea. Two modern corals from Eilat/Israel (EILAT-15B, EILAT-1), and one modern coral (AQ2), one fossil late Holocene coral (AQB-10-B) and one fossil last interglacial coral from Aqaba/Jordan. Microsampling, d18O analyses, age model construction, and interpolation to a bimonthly resolution were performed as recently described for a modern coral from the northernmost Red Sea (Felis et al., Paleoceanography, 2000). The microdrill bit diameter was adapted to a coral’s mean growth rate as estimated from X-radiographs in order to obtain at least six samples per year on average by continuous spot-sampling. The strong seasonal cycle in d18O was used to count annual layers in the corals. This age model is supported by the consistent pattern of annual density-band pairs. The chronologies were constructed by designating the maximum d18O value in a given year equal to mid-February (consistent with the climatological minimum in SST) and assuming a constant extension rate between the Februarys of each year. Therefore we interpolated linearly between these fixed points for further age assignments. The values obtained were interpolated linearly to create six equally spaced values per year, providing a bimonthly resolution (January-February, March-April, May-June, etc.). The age model error of the coral chronologies is in the order of 2-3 months for any given year. For a fossil coral the internal chronology starts at the base (oldest part) of a colony. For Sr/Ca analyses, inductively coupled plasma mass spectrometry was used. More information can be found in the original reference (Felis et al., Nature, 2004).

Data entered by name:

Will Carpenter

Data entered by email:

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Main reference(s):

Felis, T., G. Lohmann, H. Kuhnert, S.J. Lorenz, D. Scholz, J. Pätzold, S.A. Al-Rousan, and S.M. Al-Moghrabi. 2004. Increased seasonality in Middle East temperatures during the last interglacial period. Nature 429(6988):164-168.

Link to reference 1:

http://www.nature.com/nature/journal/v429/n6988/full/nature02546.html

Data storage link 1:

http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:3222523545993732::::P1_STUDY_ID:1883

Comments:

Updated for just core AQ2. Cores Eilat-1 and Eilat-15B can be found under High Indian native Felis-4 and High Indian native Felis-5, respectively.2/19/2012 - Amy Wagner (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Current dating method:

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Annual snow acc rate:

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Category: Ocean2k