Global calibration of a novel, branched GDGT-based soil pH proxy
Recently, 6-methyl branched glycerol dialkyl glycerol tetraethers (brGDGTs) were separated
from 5-methyl brGDGTs, which are used in brGDGT-based proxies. Here we analyzed
brGDGTs in 27 soil samples along the 400 mm isoline of mean annual precipitation in China
by using tandem 2D liquid chromatography. The fractional abundance of 6-methyl brGDGTs
showed a positive correlation with soil pH, while that of 5-methyl brGDGTs decreased with
increasing soil pH. The abundance ratio of 6-/5-methyl brGDGTs, namely the isomerization …
from 5-methyl brGDGTs, which are used in brGDGT-based proxies. Here we analyzed
brGDGTs in 27 soil samples along the 400 mm isoline of mean annual precipitation in China
by using tandem 2D liquid chromatography. The fractional abundance of 6-methyl brGDGTs
showed a positive correlation with soil pH, while that of 5-methyl brGDGTs decreased with
increasing soil pH. The abundance ratio of 6-/5-methyl brGDGTs, namely the isomerization …
Global calibration of a novel, branched GDGT-based soil pH proxy.
XWJ Xiao WenJie, XYP Xu YunPing, DS Ding Su… - 2015 - cabidigitallibrary.org
Recently, 6-methyl branched glycerol dialkyl glycerol tetraethers (brGDGTs) were separated
from 5-methyl brGDGTs, which are used in brGDGT-based proxies. Here we analyzed
brGDGTs in 27 soil samples along the 400 mm isoline of mean annual precipitation in China
by using tandem 2D liquid chromatography. The fractional abundance of 6-methyl brGDGTs
showed a positive correlation with soil pH, while that of 5-methyl brGDGTs decreased with
increasing soil pH. The abundance ratio of 6-/5-methyl brGDGTs, namely the isomerization …
from 5-methyl brGDGTs, which are used in brGDGT-based proxies. Here we analyzed
brGDGTs in 27 soil samples along the 400 mm isoline of mean annual precipitation in China
by using tandem 2D liquid chromatography. The fractional abundance of 6-methyl brGDGTs
showed a positive correlation with soil pH, while that of 5-methyl brGDGTs decreased with
increasing soil pH. The abundance ratio of 6-/5-methyl brGDGTs, namely the isomerization …
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