南大洋の表層堆積物における多環芳香族炭化水素の緯度分布

概要

論文の詳細を見る
Polycyclic aromatic hydrocarbons (PAHs) were determined in nine deep-sea surface sediments collected from the Australian sector of the Southern Ocean (47°S-66°S). Total concentrations of three- to seven-ring PAHs except for perylene show that they are low in the middle latitudes (〜48°S) but significantly higher toward higher latitudes (65°S). Their concentrations at 65°S are 〜10 times higher than those of the middle latitudes. On the other hand, concentrations of PAHs in the Southern Ocean sediments are remarkably lower than those of the northern North Pacific, indicating an asymmetrical distribution of PAHs between both hemispheres. This may be associated with the concentrated emission sources of PAHs in the middle latitudes in the Northern Hemisphere. Concentrations of retene, which is originated from biomass burning in the middle latitudes, are extremely increased from 60°S to 65°S. These results indicate that PAHs were transported in the atmosphere from source regions to the high-latitude in the Southern Ocean.
日本地球化学会の論文
2001-06-20