Publication Date:
2023-10-07
Description:
Settling particles in the water column of Lake Chala, a small (4.2 km2), deep (~90 m), and permanently stratified tropical crater lake at ~880 m above sea level in East Africa (3°19'S, 37°42'E) were collected monthly at 35 m water depth from August 2010 to January 2015 from mid-lake position. The collected material was allowed to settle and stored frozen after decantation of excess water. Prior to analysis, the samples were thawed, filtered over pre-combusted glass fibre filters, and the frozen and freeze dried. Bulk mass flux is expressed as mg m-2 d-1. The concentration of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in the settling particles was analyzed using ultra high performance liquid chromatography-mass spectrometry, separating 5-methyl and 6-methyl brGDGT isomers.
Keywords:
Branched glycerol dialkyl glycerol tetraether, flux, Ia; Branched glycerol dialkyl glycerol tetraether, flux, Ib; Branched glycerol dialkyl glycerol tetraether, flux, Ic; Branched glycerol dialkyl glycerol tetraether, flux, IIa; Branched glycerol dialkyl glycerol tetraether, flux, IIa'; Branched glycerol dialkyl glycerol tetraether, flux, IIb; Branched glycerol dialkyl glycerol tetraether, flux, IIb'; Branched glycerol dialkyl glycerol tetraether, flux, IIc; Branched glycerol dialkyl glycerol tetraether, flux, IIc'; Branched glycerol dialkyl glycerol tetraether, flux, IIIa; Branched glycerol dialkyl glycerol tetraether, flux, IIIa'; Branched glycerol dialkyl glycerol tetraether, flux, IIIb; Branched glycerol dialkyl glycerol tetraether, flux, IIIb'; Branched glycerol dialkyl glycerol tetraether, flux, IIIc; Branched glycerol dialkyl glycerol tetraether, flux, IIIc'; Date; Date/time end; Date/time start; Duration, number of days; Hexamethylated branched glycerol dialkyl glycerol tetraether, flux, sum; Isomer ratio; Lake_Chala; Lake Chala, East Africa; Month; MULT; Multiple investigations; Pentamethylated branched glycerol dialkyl glycerol tetraether, flux, sum; Tetramethylated branched glycerol dialkyl glycerol tetraether, flux, sum; Total mass, flux per day; Ultra-high-performance liquid chromatography (UHPLC; Agilent 1260 Infinity) coupled to a single quadrupole mass detector (Agilent 6130)
Type:
Dataset
Format:
text/tab-separated-values, 1325 data points
Permalink