Light scattering and suspended particulate matter in the Arctic Ocean north of Ellesmere Island

1977 ◽  
Vol 33 (3) ◽  
pp. 131-136 ◽  
Author(s):  
Hasong Pak ◽  
R. E. Peterson ◽  
J. R. V. Zaneveld
Keyword(s):  
Particulate Matter ◽  
Light Scattering ◽  
Arctic Ocean ◽  
Suspended Particulate Matter ◽  
Ellesmere Island ◽  
The Arctic ◽  
Suspended Particulate ◽  
The Arctic Ocean

scholarly journals Prominent bacterial heterotrophy and sources of <sup>13</sup>C-depleted fatty acids to the interior Canada Basin

2013 ◽  
Vol 10 (11) ◽  
pp. 7065-7080 ◽  
Author(s):  
S. R. Shah ◽  
D. R. Griffith ◽  
V. Galy ◽  
A. P. McNichol ◽  
T. I. Eglinton
Keyword(s):  
Fatty Acids ◽  
Particulate Matter ◽  
Organic Carbon ◽  
Suspended Particulate Matter ◽  
Surface Waters ◽  
Canada Basin ◽  
The Arctic ◽  
Deep Basin ◽  
Suspended Particulate ◽  
Chemoautotrophic Bacteria

Abstract. In recent decades, the Canada Basin of the Arctic Ocean has experienced rapidly decreasing summer sea ice coverage and freshening of surface waters. It is unclear how these changes translate to deeper waters, particularly as our baseline understanding of organic carbon cycling in the deep basin is quite limited. In this study, we describe full-depth profiles of the abundance, distribution and carbon isotopic composition of fatty acids from suspended particulate matter at a seasonally ice-free station and a semi-permanently ice-covered station. Fatty acids, along with suspended particulate organic carbon (POC), are more concentrated and 13C-enriched under ice cover than in ice-free waters. But this influence, apparent at 50 m depth, does not propagate downward below 150 m depth, likely due to the weak biological pump in the central Canada Basin. Branched fatty acids have δ13C values that are similar to suspended POC at all depths and are more 13C-enriched than even-numbered saturated fatty acids at depths above 3000 m. These are likely to be produced in situ by heterotrophic bacteria incorporating organic carbon that is isotopically similar to total suspended POC. Below surface waters, there is also the suggestion of a source of saturated even-numbered fatty acids which could represent contributions from laterally advected organic carbon and/or from chemoautotrophic bacteria. At 3000 m depth and below, a greater relative abundance of long-chain (C20–24), branched and unsaturated fatty acids is consistent with a stronger influence of re-suspended sedimentary organic carbon. At these deep depths, two individual fatty acids (C12 and iso-C17) are significantly depleted in 13C, allowing for the possibility that methane oxidizing bacteria contribute fatty acids, either directly to suspended particulate matter or to shallow sediments that are subsequently mobilized and incorporated into suspended particulate matter within the deep basin.

scholarly journals A new aeromagnetic survey of the North Pole and the Arctic Ocean north of Greenland and Ellesmere Island

2010 ◽  
Vol 62 (10) ◽  
pp. 829-832 ◽  
Author(s):  
Jürgen Matzka ◽  
Thorkild M. Rasmussen ◽  
Arne V. Olesen ◽  
Jens Emil Nielsen ◽  
Rene Forsberg ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Ellesmere Island ◽  
North Pole ◽  
The Arctic ◽  
Aeromagnetic Survey ◽  
The North ◽  
The Arctic Ocean

scholarly journals Organic Compounds and Suspended Particulate Matter in Snow of High Latitude Areas (Arctic and Antarctic)

Atmosphere ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 928
Author(s):  
Inna A. Nemirovskaya ◽  
Vladimir P. Shevchenko
Keyword(s):  
Particulate Matter ◽  
Organic Compounds ◽  
Suspended Particulate Matter ◽  
White Sea ◽  
The Arctic ◽  
Air Masses ◽  
Kandalaksha Bay ◽  
Suspended Particulate ◽  
Polycyclic Aromatic ◽  
Fast Ice

Long-term studies of suspended particulate matter (SPM) and organic compounds (OCs)—Corg, lipids, hydrocarbons (aliphatic—AHCs and polycyclic aromatic—PAHs), and chlorophyll a in the snow cover of the Arctic (Franz Victoria Trough, Mendeleev Rise, White Sea) and Antarctica (in the coastal waters on fast ice and on the mainland near Russian stations) were generalized. It was shown that in the Arctic, the influence of continental air masses leads to an increase in OCs in snow. Therefore, despite the fact that the Franz Victoria Trough and the Mendeleev Rise are at the same latitude (82° N), the OCs content in the snow in the region of the Mendeleev Rise was lower for aliphatic hydrocarbons 5 and 14–18 μg/L. In the White Sea, the AHC content in the snow and the upper layers of the ice in the mouth of the Severnaya Dvina River and in the Kandalaksha Bay was higher than that in the lower layers of the ice and sharply decreased with distance from the emission sources. As a result, the snow was supplied mainly by pyrogenic PAHs. In the Antarctica, the lowest OCs levels in atmosphere were found in areas where coastal hills are covered with snow. The maximum SPM and AHCs concentration was found in the sludge (SPM—to 4.37 mg/L, AHC—to 33 μg/L). An increase in the concentration of OCs and SPM in snow sampled on the continent took place in the areas of stations and oases (St. Novolazarevskaya) where the predominance of mineral particles in the SPM was registered. In the area of the operating stations, mainly low molecular weight PAHs with the dominance of petroleum PAHs were found in the SPM of snow and in mosses.

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