西北太平洋大气有机碳、元素碳数据集（现代）

搭载西北太平洋航次采集了大气样品（包括颗粒物TSP和气相PUF）和表层水样，通过样品分析调查了东海至西北太平洋碳质气溶胶（有机碳OC和元素碳EC）和正构烷烃（C14-C33）的大气传输、赋存和沉降。TSP样品中OC和EC含量的空间变化不一致，暗示了二者在来源上的异质性。相比于OC， EC在TSP 中的含量变化具有明显的气团差异，这与EC的来源密切相关；当陆源长距离传输减弱时，海洋性气团EC含量显著降低。取样期间，部分海洋性气团 OC含量也相对较高，这可能与海洋生物源的本地释放相关。海洋性气团中海洋有机质源正构烷烃的丰度显著高于陆源气团，且海洋性气团气溶胶中正构烷烃的构成谱与其在对应的海水表层颗粒物具有较好的相关性，暗示了破浪过程中海水表层薄膜富集的OC向上覆大气的释放和迁移。通过分析大气样品中正构烷烃的气-粒分配值与其过冷液体蒸汽压的线性关系，发现受陆源传输影响，不同性质气团中碳质气溶胶构成的明显差异使正构烷烃气-粒分配特征随不同性质气团而带有明显分异；部分海洋性气团线性关系缺失，这与海洋源正构烷烃同族体较强的颗粒相分配相关。相比于陆架边缘海，碳质气溶胶及其吸附的正构烷烃的风成输送对开阔西北太平洋底边层陆源脂类的赋存贡献更显著。

Atmospheric samples (including total suspended particulates (TSP) and gas-phase polyurethane foam (PUF) samples) and surface water samples were collected during the Northwest Pacific cruise. Through sample analysis, we investigated the atmospheric transport, occurrence, and deposition of carbonaceous aerosols (organic carbon (OC) and elemental carbon (EC)) and n-alkanes (C14–C33) from the East China Sea to the Northwest Pacific. The spatial variations of OC and EC contents in TSP samples were inconsistent, suggesting heterogeneity in their sources. Compared with OC, the content variations of EC in TSP showed significant air mass-dependent differences, which were closely related to the sources of EC; when terrestrial long-range transport weakened, the EC content in marine air masses decreased significantly. During the sampling period, some marine air masses also had relatively high OC contents, which may be associated with local release from marine biological sources. The abundance of marine organic matter-derived n-alkanes in marine air masses was significantly higher than that in terrestrial air masses. Additionally, the composition profiles of n-alkanes in aerosols from marine air masses showed a good correlation with those in corresponding surface seawater particulates, suggesting the release and transport of OC-enriched organic matter in the surface microlayer of seawater to the overlying atmosphere during wave-breaking processes. By analyzing the linear relationship between the gas-particle partitioning values of n-alkanes and their supercooled liquid vapor pressures, we found that affected by terrestrial transport, the distinct differences in the composition of carbonaceous aerosols among different air masses led to significant differentiation in the gas-particle partitioning characteristics of n-alkanes across air mass types. The linear correlation was absent in some marine air masses, which was related to the strong particle-phase partitioning of marine-derived n-alkane homologs. Compared with the continental shelf marginal seas, the aeolian transport of carbonaceous aerosols and their adsorbed n-alkanes made a more significant contribution to the occurrence of terrestrial lipids in the benthic layer of the open Northwest Pacific.