Lake 578: Holocene-length multiproxy (temperature, productivity, anoxia) reconstructions; 2019-2024 ...
Global warming particularly impacts terrestrial and aquatic ecosystems in the Arctic. To constrain the sensitivity of Arctic lakes and make meaningful predictions about future change under global warming, we need to examine their response to previous warm phases, such as those throughout the Holocen...
| Main Authors: | , , , , , |
|---|---|
| Format: | Dataset |
| Language: | English |
| Published: |
NSF Arctic Data Center
2024
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.18739/a24m91c5s https://arcticdata.io/catalog/view/doi:10.18739/A24M91C5S |
| Summary: | Global warming particularly impacts terrestrial and aquatic ecosystems in the Arctic. To constrain the sensitivity of Arctic lakes and make meaningful predictions about future change under global warming, we need to examine their response to previous warm phases, such as those throughout the Holocene. Lake sediments from Greenland’s deglaciated area offer valuable archives to investigate past climate variability and associated lake changes. Here, we applied hyperspectral imaging and lipid biomarker thermometry to a Holocene-length sediment record from Lake 578 in the Eastern Settlement of the Norse (61.08° North (N), 45.62° West (W); ~170 meters (m) above sea level (asl)) to investigate the local temperature, productivity, and anoxia histories. We calibrated branched glycerol dialkyl glycerol tetraethers (brGDGTs) with summer mean water temperatures (SMWT) using a site-specific calibration and analyzed pigment fluxes based on hyperspectral imaging. Notably, the anoxia reconstructions were corroborated with ... |
|---|