Isoprene mixing ratio in ambient air across the Southern Ocean in the austral summer of 2016/2017, during the Antarctic Circumnavigation Expedition (ACE).

Dataset abstract

This dataset contains the mixing ratios of isoprene (C5H8) in ambient air measured during the Antarctic Circumnavigation Expedition around the Southern Ocean in the austral summer of 2016/2017 using the iDirac, an autonomous gas chromatograph (Bolas et al., 2020). Samples were collected at a temporal resolution of approximately 10 minutes, with sizeable gaps in the dataset during Legs 1 and 3 due to instrument malfunction.

Isoprene represents one of the largest biogenic emissions on the planet. While the magnitude and mechanism of its emissions on land are well established, there is still large uncertainty on the drivers of marine isoprene emissions. This dataset, consisting of continuous measurements at a relatively high temporal resolution, represents a unique opportunity to better understand marine isoprene emissions in the Southern Ocean.

Dataset contents

ace_isoprene_mixing_ratio_ambient_air.csv, data file, comma-separated values

data_file_header.txt, metadata, text

README.txt, metadata, text

数据集摘要

本数据集收录了2016/2017年南半球夏季南极环球航行考察期间，于南大洋周边环境空气中测得的异戊二烯（C₅H₈）混合比，测量采用自主式气相色谱仪iDirac（Bolas等，2020）完成。采样时间分辨率约为10分钟，但因仪器故障，第1航段与第3航段的数据集存在大量数据缺失。

异戊二烯是全球规模最大的生物源排放物之一。尽管陆地异戊二烯排放的强度与机制已得到充分明确，但海洋异戊二烯排放的驱动因素仍存在较大不确定性。本数据集以相对较高的时间分辨率开展连续测量，为深入理解南大洋海域的海洋异戊二烯排放提供了独特研究契机。

数据集内容

ace_isoprene_mixing_ratio_ambient_air.csv：数据文件，逗号分隔值（CSV）格式
data_file_header.txt：元数据，文本文件
README.txt：元数据，文本文件