Methane data collected in the 36th CHINARE cruise during 2019-2020
Methane (CH4) is one of the important greenhouse gases. CH4 dry mole fractions in the atmosphere have increased continuously since the onset of the industrial revolution, contributing to more than 20% of the anthropogenic radiative forcing in the lower atmosphere since 1750. In addition, the ice-cov...
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| Format: | Dataset |
| Language: | English |
| Published: |
2022
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| Online Access: | https://zenodo.org/record/7063261 https://doi.org/10.5281/zenodo.7063261 |
| Summary: | Methane (CH4) is one of the important greenhouse gases. CH4 dry mole fractions in the atmosphere have increased continuously since the onset of the industrial revolution, contributing to more than 20% of the anthropogenic radiative forcing in the lower atmosphere since 1750. In addition, the ice-covered parts of the Antarctic are now a reservoir of organic carbon, suggesting that the Antarctic ice sheet may be a neglected but essential component of the global CH4 budget. Seawater samples for CH4 analysis were collected onboard R/V “Xuelong 2” during the 36th Chinese Antarctic Research Expedition (CHINARE) to the Ross Sea from 3–6 January 2020. 1. Equipment: Name gas chromatography Model: Agilent 7890A Method: purge-and-trap Calibration: CH4:N2 mixtures, China Institute of Metrology 2 Sampling and analysis The samples were collected with a rosette water sampler equipped with Niskin bottles. Briefly, seawater was transferred to biochemical-oxygen-demand bottles (one for each depth), which were stored in the dark at 4 °C with after adding 180 μL of saturated HgCl2. 3 Location Ross Sea. |
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