Growing anthropogenic activity in the Arctic, especially near regional municipal and transportation hubs, threatens coastal environments with significant changes and contamination. A detailed study of a wide set of organic-geochemical proxies in surface and subsurface sediments and soils around the typical urbanized Arctic area (Tromsø, Norway) was performed to investigate natural and anthropogenic input of hydrocarbons. The sites were located close to main areas of human activity and differed in the level of anthropogenic pressure: oil terminal, boat harbor and recreation beach zone in the city center, and a remote, conditionally-clean area. The samples from each site were collected along four subtidal – intertidal – supratidal transects. GC–MS data on the distribution of more than 110 compounds were obtained including n-alkanes, isoprenoids, terpanes, parent polycyclic aromatic hydrocarbons (PAHs), and alkyl PAHs. Organic matter embedded in a mineral matrix was more thermally mature than its fresh non-bound fraction. Biomarker distribution and diagnostic ratios attested to the predominantly local origin of near-shore organic matter formation (phytoplankton, algae, high foliar plants, grass). PAH composition revealed a significant input of pyrogenic components from liquid and solid fuel combustion to the surface coarse-grained sediments. Background bacterial activity was evidenced by the high content of biohopanes and hopenes in less polluted sediments and soils. The presence of an unresolved complex mixture and even n-alkanes in sediment profiles from the most polluted sites attested to the active biodegradation that, together with the erosion of the upper layers by tidal currents, reduces the toxic compound penetration deeper into the sediments.

北极地区不断增长的人为活动，尤其是在区域市政和交通枢纽附近，威胁着沿海环境的重大变化和污染。对典型城市化北极地区（挪威特罗姆瑟）周围地表和地下沉积物和土壤中的一系列有机地球化学指标进行了详细研究，以调查碳氢化合物的自然和人为输入。这些地点靠近人类活动的主要区域，人为压力水平不同：市中心的石油码头、船港和休闲海滩区，以及一个偏远的、有条件的清洁区。沿四个潮下-潮间带-潮上横断面收集每个地点的样品。获得了超过 110 种化合物分布的 GC-MS 数据，包括n-烷烃、类异戊二烯、萜烯、多环芳烃 (PAH) 和烷基 PAH。嵌入矿物基质中的有机物质比其新鲜的非结合部分在热上更成熟。生物标志物分布和诊断比率证明了近岸有机物质形成（浮游植物、藻类、高叶植物、草）的主要本地来源。PAH 成分表明，液体和固体燃料燃烧产生的热解成分大量输入到地表粗粒沉积物中。背景细菌活性由污染较少的沉积物和土壤中高含量的生物hopanes 和hopenes 证明。污染最严重地点的沉积物剖面中存在未解决的复杂混合物甚至正烷烃 证明了活跃的生物降解，加上潮汐流对上层的侵蚀，减少了有毒化合物深入沉积物的渗透。