Aerosol Properties, Ice-edge to Equator voyage (IN2016_V03): CN3 and CCN

Atmospheric aerosols were continuously sampled on the RV Investigator during the Ice-edge to Equator (I2E) voyage (IN2016_V03) between April and June 2016. The ship travelled from Hobart, Australia to the Ross Sea and then along the 170th west meridian to the equator, before traversing to Lautoka, Fiji. Samples were drawn from an inlet mounted at the bow, approximately 18 m above sea level.Within the suite of observations included observations of number concentrations of aerosols (condensation nuclei larger than 3 nm, CN3, using a TSI Condensation Particle Counter 3776) and cloud condensation nuclei (CCN, measured using a DMT CCN-100).Supporting measurements of gas species, black carbon mass concentrations and local meteorology have been averaged to the same time-base to assist with identification of samples contaminated by ship emissions.Sampling periods impacted by instrument faults or maintenance were logged and have been identified with a “log_flag”. Sampling periods that showed evidence of contamination from ship emissions have been identified with an “ex_flag”. Both flags are recorded in the in the “ProcessedAerosolData“ data file and further details are given in the “summary” file.The ”summary” document provides further details of the records available, sampling parameters and data analysis applied to this dataset.

2016年4月至6月期间，研究团队在调查者号（RV Investigator）科考船的"冰缘至赤道（I2E）"航次（航次编号IN2016_V03）中持续采集大气气溶胶样品。该航次从澳大利亚霍巴特出发，前往罗斯海，随后沿西经170°经线向赤道航行，最终抵达斐济劳托卡。采样进气口安装于船艏，距海平面高度约18米。

本次观测涵盖多项指标：气溶胶数浓度（采用TSI冷凝粒子计数器3776测量粒径大于3 nm的凝结核（CN3)）以及云凝结核（CCN，采用DMT CCN-100测量）。

配套测量的气体组分、黑碳质量浓度与局地气象数据均已对齐至统一时间基准，以便辅助识别受船舶排放污染的采样样品。

受仪器故障或维护作业影响的采样时段已被记录，并以"log_flag"标记；存在船舶排放污染迹象的采样时段则以"ex_flag"标记。两类标记均收录于"ProcessedAerosolData"数据文件中，详细说明可参见"summary"文件。

"summary"文档进一步提供了本数据集可用记录、采样参数及所采用的数据分析方法的详细信息。