Rouyer-Denimal, Louis; Nguyen Tu, Thanh Thuy; Govin, Aline; Mendez-Millan, Mercedes; Nascimento, Rodrigo Azevedo; Albuquerque, Ana Luiza Spadano; Chiessi, Cristiano Mazur; Anquetil, Christelle; Huguet, Arnaud: Molecular composition of terrestrial biomarkers of the eastern region of northeastern Brazil and transported to the Northeastern Brazilian margin, Western tropical Atlantic over the late Pleistocene from sediment core GL-1180 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993726 (dataset in review)
Abstract:
In order to explore past vegetation and hydroclimatic changes in the eastern region of northeastern Brazil over the late Pleistocene, we present the long-chain n-alkanes signature of modern native vegetation of the eastern region of northeastern Brazil: Caatinga and Atlantic Forest. Based on the relative abundance of long-chain n-alkanes in samples collected in September 2022, a novel proxy, the Caatinga Vegetation Index has been proposed to distinguish samples of the two vegetations.
Keyword(s):
Funding:
Coordenação de Aperfeicoamento de Pessoal de Nível Superior (CAPES), grant/award no. 8881.712022/2022-1
French National Research Agency (ANR), grant/award no. ANR-11-IDEX-0004-17-EURE-0006: IPSL-Climate Graduate School-EUR
National Council for Scientific and Technological Development (CNPq), grant/award no. #305285/2025-4
Coverage:
Latitude: -8.450000 * Longitude: -33.550000
Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 17.30 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Rouyer-Denimal, Louis | Geocode | |
| 2 | AGE | Age | ka BP | Rouyer-Denimal, Louis | Geocode | |
| 3 | Branched and isoprenoid tetraether index | BIT | Rouyer-Denimal, Louis | see reference(s) | ||
| 4 | Branched glycerol dialkyl glycerol tetraether IIIa/Branched glycerol dialkyl glycerol tetraether IIa ratio | brGDGT IIIa/brGDGT IIa | Rouyer-Denimal, Louis | see reference(s) | ||
| 5 | Branched glycerol dialkyl glycerol tetraether, Ia, relative abundance | brGDGT Ia | Rouyer-Denimal, Louis | High pressure liquid chromatography coupled with mass spectrometry with an atmospheric pressure chemical ionization source (HPLC-APCI-MS), Shimadzu, LCMS 2020 | ||
| 6 | Branched glycerol dialkyl glycerol tetraether, IIa, relative abundance | brGDGT IIa | Rouyer-Denimal, Louis | High pressure liquid chromatography coupled with mass spectrometry with an atmospheric pressure chemical ionization source (HPLC-APCI-MS), Shimadzu, LCMS 2020 | ||
| 7 | Branched glycerol dialkyl glycerol tetraether, IIIa, relative abundance | brGDGT IIIa | Rouyer-Denimal, Louis | High pressure liquid chromatography coupled with mass spectrometry with an atmospheric pressure chemical ionization source (HPLC-APCI-MS), Shimadzu, LCMS 2020 | ||
| 8 | Ratio | Ratio | Rouyer-Denimal, Louis | see reference(s) | Terrestrial over Aquatic Ratio | |
| 9 | Average chain length, n-Alkanes, C27-C35 | ACL 27-35 | Rouyer-Denimal, Louis | see reference(s) | ||
| 10 | Carbon Preference Index, n-alkanes (C27-C35) | CPI 27-35 | Rouyer-Denimal, Louis | see reference(s) | ||
| 11 | Caatinga Vegetation Index | CVI | Rouyer-Denimal, Louis | see reference(s) | ||
| 12 | n-Alkanes | n-Alkanes | ng/g | Rouyer-Denimal, Louis | see reference(s) | |
| 13 | Branched glycerol dialkyl glycerol tetraether, per unit sediment mass | brGDGT/sed | ng/g | Rouyer-Denimal, Louis | High pressure liquid chromatography coupled with mass spectrometry with an atmospheric pressure chemical ionization source (HPLC-APCI-MS), Shimadzu, LCMS 2020 |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1485 data points