Aerosol samples (n = 14), collected over the eastern North Pacific (ENP, 27–52°N and 150–172°W), were studied for dicarboxylic acids (hereafter diacids, C₂-C₁₀), ω-oxoacids, pyruvic acid, and α-dicarbonyls as well as water-soluble organic carbon (WSOC) and total nitrogen (WSTN). We found diacids as the most abundant compound class followed by ω-oxoacids and α-dicarbonyls. Molecular distributions of diacids were characterized by the predominance of oxalic (C₂) (58%) acid followed by malonic (C₃) (15%) and succinic (C₄) (13.5%) acids. However, we found a predominance of C₄ over C₃ in five samples, where 4-oxobutanoic acid (ωC₄) was the most abundant ω-oxoacid species (34.6% of its class). Moreover, a strong correlation (r² = 0.72) was obtained between ωC₄ and C₄ in those samples, suggesting that high abundances of C₄ are associated with sea-to-air emission of unsaturated fatty acids and their further photochemical processing. Good relationships between C₂ and C₃ (r² = 0.88) and C₃ and C₄ (r² = 0.79) in the marine aerosols further suggest that C₂ is produced via photochemical degradation of C₃ and C₄ over the ENP. WSOC and WSTN showed higher abundances in the longitudinal transect of 165-172^oW, where ω-oxoacids were abundantly detected. This study demonstrates that atmospheric levels of water-soluble organic aerosols in the ENP are largely regulated by the primary productivity followed by sea-to-air emissions of unsaturated fatty acids and isoprene and the subsequent photochemical oxidation.

研究 了北太平洋东部（ENP，27–52°N和150–172°W）收集的气溶胶样品（n = 14）中的二元羧酸（以下称二元酸，C ₂ -C ₁₀），ω-含氧酸，丙酮酸，α-二羰基以及水溶性有机碳（WSOC）和总氮（WSTN）。我们发现二酸是最丰富的化合物类别，其次是ω-含氧酸和α-二羰基。二酸的分子分布以草酸（C ₂）（58％）为主，其次是丙二酸（C ₃）（15％）和琥珀酸（C ₄）（13.5％）。但是，我们在五个样品中发现了C ₄高于C ₃的优势，其中4-氧代丁酸（ωC₄）是最丰富的ω-含氧酸种类（同类的34.6％）。此外，强相关性（r ² 被ωC之间获得= 0.72）₄和C ₄的那些样品中，表明的C高丰度₄与不饱和脂肪酸的海-空气排放和其进一步的光化学处理相关联。 海洋气溶胶中C ₂和C ₃（r ²  = 0.88）与C ₃和C ₄（r ² = 0.79）之间的良好关系进一步表明C ₂是通过C ₃和C _4的光化学降解而产生的超过ENP。WSOC和WSTN在165-172 ^o W的纵向横断面上显示出较高的丰度，其中富含ω-含氧酸。这项研究表明，ENP中的水溶性有机气溶胶的大气水平在很大程度上受主要生产力的影响，其次是海油向大气中排放不饱和脂肪酸和异戊二烯以及随后的光化学氧化作用。