Near-surface permafrost aggradation in Northern Hemisphere peatlands shows regional and global trends during the past 6000 years
The Holocene
Links
- More information: Publisher Index Page (via DOI)
- Open Access Version: Publisher Index Page
- Download citation as: RIS | Dublin Core
Abstract
The history of permafrost aggradation and thaw in northern peatlands can serve as an indicator of regional climatic history in regions where records are sparse. We infer regional trends in the timing of permafrost aggradation and thaw in North American and Eurasian peatland ecosystems based on plant macrofossils and peat properties using existing peat core records from more than 250 cores. Results indicate that permafrost was continuously present in peatlands during the last 6000 years in some present-day continuous permafrost zones and formed after 6000 BP in peatlands in the isolated to discontinuous permafrost regions. Rates of permafrost aggradation in peatlands generally increased after 3000 BP and were greatest between 750 and 0 BP, corresponding with neoglacial cooling and the Little Ice Age (LIA), respectively. Peak periods of permafrost thaw occurred after 250 BP, when permafrost aggradation in peatlands reached its maximum extent and as temperatures began warming after the LIA, suggesting that permafrost thaw is likely to continue in the future. The broader correlation of permafrost aggradation in peatlands with known climatic trends and other proxies such as pollen records suggests that this record can be a valuable addition to regional climate reconstructions.
Suggested Citation
Treat, C.C., and Jones, M., 2018, Near-surface permafrost aggradation in Northern Hemisphere peatlands shows regional and global trends during the past 6000 years: The Holocene, v. 28, no. 6, p. 998-1010, https://doi.org/10.1177/0959683617752858.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Near-surface permafrost aggradation in Northern Hemisphere peatlands shows regional and global trends during the past 6000 years |
| Series title | The Holocene |
| DOI | 10.1177/0959683617752858 |
| Volume | 28 |
| Issue | 6 |
| Publication Date | January 19, 2018 |
| Year Published | 2018 |
| Language | English |
| Publisher | Sage Journals |
| Contributing office(s) | Eastern Geology and Paleoclimate Science Center, Florence Bascom Geoscience Center |
| Description | 13 p. |
| First page | 998 |
| Last page | 1010 |