BiologyBrowser - Oceanography

26-28 September 2011 - XLV Congresso Internazionale della Società di Linguistica Italiana

kim hunter — Tue, 09 Aug 2011 08:10:51 +0000

Aosta/Torino, Italy

16-19 October 2011 - Fundamental for Life: Soil, Crop and Environmental Sciences - ASA-CSSA-SSSA International Annual Meeting

kim hunter — Mon, 08 Aug 2011 09:00:57 +0000

American Society of Agronomy - Crop Science Society of America - Soil Science Society of America - San Antonio, Texas, USA

Macrofauna communities in surface sediments in the Amundsen Basin, at the Morris Jesup Rise and at the Yermak Plateau (Eurasian Arctic Ocean)

admin — Mon, 22 Nov 2010 19:47:18 +0000

Macrofaunal communities of the western Eurasian Arctic Ocean were studied along a transect from the North Pole, across the Amundsen Basin and Gakkel Ridge towards the Morris Jesup Rise and the Yermak Plateau. Samples were collected during autumn 1991, from depths of 560?4411 m, using a box corer. Macrofaunal species numbers varied from 1 to 11 per 0.02 m**2 in the basins approaching the Morris Jesup Rise and from 44 to 81 per 0.25 m**2 at the Yermak Plateau. Abundances increased from 1 to 31 per 0.02 m**2 in the basin and on the Morris Jesup Rise to 24?60 per 0.02 m**2 on the Yermak Plateau.

Pollen analysis from Fiekers Busch, Rinteln, Germany

admin — Mon, 22 Nov 2010 19:47:10 +0000

Fiekers Busch is a wet alder wood close to Rinteln (southwest of Hannover/West Germany) existing there since about 6 000 or - at the most - 7 500 radiocarbon years. The sandy layers below the peaty sequence date from about 9 000 BP. The pollen diagram shows the basic trends of the postglacial vegetational development. Low pollen frequency and poor pollen preservation do , however, strongly restrict the possibilities to explain the peculiarities of the pollendiagram, especially the high pine and linden values.

10Be records of sediment cores from high northern latitudes

admin — Mon, 22 Nov 2010 19:47:02 +0000

The 10Be records of four sediment cores forming a transect from the Norwegian Sea at 70?N (core 23059) via the Fram Strait (core 23235) to the Arctic Ocean at 86?N (cores 1533 and 1524) were measured at a high depth resolution. Although the material in all the cores was controlled by different sedimentological regimes, the 10Be records of these cores were superimposed by glacial/interglacial changes in the sedimentary environment.

Stable oxygen and carbon isotope ratios of Globigerinoides sacculifer of ODP Hole 134-828A from the Southwest Pacific (Table 2)

admin — Mon, 22 Nov 2010 19:46:54 +0000

Oxygen-isotope analyses of planktonic foraminifera from 57 western Pacific deep-sea cores are compared for the Holocene and the Last Glacial Maximum (LGM). Carbonate dissolution, sedimentation rates/bioturbation, sample density, and vital effects are assessed before the sea-surface salinity signal of these records is reconstructed. Average glacial-interglacial Delta delta18O values in the western Pacific are found to be close to those in the Atlantic Ocean (1.76 ? in the Pacific compared to 1.80 ?

Planktonic foraminifera in sediments of the Ibero-Moroccan Continental Margin

admin — Mon, 22 Nov 2010 19:46:50 +0000

Recent clays cover the East Atlantic continental slopes. They are gray and poor in sand off Portugal (Cape Sines), but reddish brown to reddish gray and richer in sand off Morocco (Cape Mazagan). The majority of the 19 sediment cores, which were taken mainly on two profiles (Fig. 3), can be correlated by means of planktonic foraminifera (Figs. 27, 28). The following parameters seem to be well suited for this purpose: qualitative and quantitative distribution of the planktonic foraminiferal species and faunas, coiling ratios of three Globorotalia-species: G. crassaformis, G. hirsuta and G.

Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic

admin — Mon, 22 Nov 2010 19:46:45 +0000

During the first section of the "Meteor" cruise No. 2 a profile was run from the Azores to the south across the flanks of the Mid-Atlantic Ridge with a chain of seamounts. The profile extended between the Cruiser (living) and the Hyeres seamounts, which, according to our soundings, form a connected massif, and across the centre of the Grosse Meteor Bank (30?N, 28.5 ?W). These seamounts rise from a depth of more than 4000 m up till close to the surface of the sea forming there a large almost flat plateau. In the case of the Grosse Meteor Bank, this plateau has a N-S extension of approx.

Age model of ODP Site 162-983

admin — Mon, 22 Nov 2010 19:46:41 +0000

At ODP Site 983, relative geomagnetic paleointensity and planktic and benthic delta18O records have been acquired for the last 350 kyr. The mean sedimentation rate in this interval is 11.3 cm/kyr. Magnetic properties and hysteresis ratios indicate that pseudo-single domain magnetite is the remanence carrier. Volume susceptibility (kappa), anhysteretic (ARM) and isothermal (IRM) remanence values vary by a factor of 3-4, well within the criteria usually cited for paleointensity studies. Natural remanent magnetization (NRM) is normalized by ARM and IRM to acquire the paleointensity proxy.

Alkenones in the Mediterranean Sea

admin — Mon, 22 Nov 2010 19:46:23 +0000

Time-series of downward alkenone fluxes have been investigated at 200 m depth over a one year sediment trap experiment, in the Northwestern Mediterranean Sea. Alkenone flux maxima occurred in autumn and to a lesser extent in May, during the spring bloom. Temperature estimates calculated from the UK'37 index revealed that alkenone producers preferentially develop in subsurface waters (at about 50 m) in spring, whereas the autumn alkenone production occurred upper in the water column (around 30 m).