David J. Harning
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View article: Sea-level driven isolation of glacial plant refugia revealed by submerged lake sediment from the Bering Land Bridge and St. Matthew Island
Sea-level driven isolation of glacial plant refugia revealed by submerged lake sediment from the Bering Land Bridge and St. Matthew Island Open
Bering Land Bridge (BLB) climate and vegetation during the Last Glacial Maximum (LGM) remains largely understudied, given challenges associated with collecting records from the submerged BLB. Previous records, confined to the margins of th…
View article: Both redox potential and climate control molecular proxies in Icelandic Holocene lake sediments
Both redox potential and climate control molecular proxies in Icelandic Holocene lake sediments Open
Ancient DNA and branched glycerol dialkyl glycerol tetraethers are powerful tools to reconstruct past ecosystems and climate in high-latitude lakes, but often require contrasting redox conditions for reliable interpretations. Here, we pres…
View article: Ancient DNA and lipid biomarkers quantify the climate sensitivity of highland shrubification in Iceland
Ancient DNA and lipid biomarkers quantify the climate sensitivity of highland shrubification in Iceland Open
Future changes in high latitude shrubification are expected to lead to changes in ecosystem structure and positive climate feedbacks, but the rates and elevational range of shrubification are still poorly constrained. Using a sediment reco…
View article: High-resolution Holocene record based on detailed tephrochronology from Torfdalsvatn, north Iceland, reveals natural and anthropogenic impacts on terrestrial and aquatic environments
High-resolution Holocene record based on detailed tephrochronology from Torfdalsvatn, north Iceland, reveals natural and anthropogenic impacts on terrestrial and aquatic environments Open
Open questions remain around the Holocene variability of climate in Iceland, including the relative impacts of natural and anthropogenic factors on Late Holocene vegetation change and soil erosion. The lacustrine sediment record from Torfd…
View article: Postdoc Perspectives on Leadership and Matters of Equity and Inclusion in Polar Science
Postdoc Perspectives on Leadership and Matters of Equity and Inclusion in Polar Science Open
In 2023, the first Polar Postdoc Leadership Workshop convened to discuss present and future polar science issues and to develop leadership skills. The workshop discussions fostered a collective commitment to inclusive leadership within the…
View article: Spatiotemporal variation of modern lake, stream, and soil water isotopes in Iceland
Spatiotemporal variation of modern lake, stream, and soil water isotopes in Iceland Open
As global warming progresses, changes in high-latitude precipitation are expected to impart long-lasting impacts on Earth systems, including glacier mass balance and ecosystem structures. Reconstructing past changes in high-latitude precip…
View article: Impact of non-thermal variables on hydroxylated GDGT distributions around Iceland
Impact of non-thermal variables on hydroxylated GDGT distributions around Iceland Open
Archaeal isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) preserved in sediments are popular tools for the reconstruction of past temperature in the global ocean. Whereas the most common GDGTs have been well studied through en…
View article: Comment on hess-2024-1
Comment on hess-2024-1 Open
Abstract. As global warming progresses, changes in high-latitude precipitation are expected to impart long-lasting impacts on earth systems, including glacier mass balance and ecosystem structure. Reconstructing past changes in high-latitu…
View article: A Holocene history of climate, fire, landscape evolution, and human activity in northeastern Iceland
A Holocene history of climate, fire, landscape evolution, and human activity in northeastern Iceland Open
Paleoclimate reconstructions across Iceland provide a template for past changes in climate across the northern North Atlantic, a crucial region due to its position relative to the global northward heat transport system and its vulnerabilit…
View article: Reply on CC1
Reply on CC1 Open
Abstract. Open questions remain around the Holocene variability of climate in Iceland, including the relative impacts of natural and anthropogenic factors on Late Holocene vegetation change and soil erosion. The lacustrine sediment record …
View article: Comment on cp-2024-26
Comment on cp-2024-26 Open
Abstract. Open questions remain around the Holocene variability of climate in Iceland, including the relative impacts of natural and anthropogenic factors on Late Holocene vegetation change and soil erosion. The lacustrine sediment record …
View article: High-resolution Holocene record from Torfdalsvatn, north Iceland, reveals natural and anthropogenic impacts on terrestrial and aquatic environments
High-resolution Holocene record from Torfdalsvatn, north Iceland, reveals natural and anthropogenic impacts on terrestrial and aquatic environments Open
Open questions remain around the Holocene variability of climate in Iceland, including the relative impacts of natural and anthropogenic factors on Late Holocene vegetation change and soil erosion. The lacustrine sediment record from Torfd…
View article: Supplementary material to "High-resolution Holocene record from Torfdalsvatn, north Iceland, reveals natural and anthropogenic impacts on terrestrial and aquatic environments"
Supplementary material to "High-resolution Holocene record from Torfdalsvatn, north Iceland, reveals natural and anthropogenic impacts on terrestrial and aquatic environments" Open
2012BC (Harning et al., 2024) and 2004NC (this study).
View article: BrGDGT lipids in cold regions reflect summer soil temperature and seasonal soil water chemistry
BrGDGT lipids in cold regions reflect summer soil temperature and seasonal soil water chemistry Open
The distribution of brGDGT lipids produced by soil bacteria has been used to reconstruct temperatures in marine and terrestrial settings as far back as the Cretaceous period. However, modern calibrations of this proxy have primarily relied…
View article: Spatiotemporal variation of modern lake, stream, and soil water isotopes in Iceland
Spatiotemporal variation of modern lake, stream, and soil water isotopes in Iceland Open
As global warming progresses, changes in high-latitude precipitation are expected to impart long-lasting impacts on earth systems, including glacier mass balance and ecosystem structure. Reconstructing past changes in high-latitude precipi…
View article: Author Response: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
Author Response: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic Open
Full text Figures and data Side by side Abstract eLife assessment Introduction Results Discussion Materials and methods Data availability References Peer review Author response Article and author information Metrics Abstract As the Arctic …
View article: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic Open
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as ‘shrubification,’ has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification.…
View article: Author Response: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
Author Response: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic Open
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as "shrubification", has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification.…
View article: Joint Public Review: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
Joint Public Review: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic Open
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as "shrubification", has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification.…
View article: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic Open
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as “shrubification”, has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification.…
View article: A Holocene history of climate, fire, landscape evolution, and human activity in Northeast Iceland
A Holocene history of climate, fire, landscape evolution, and human activity in Northeast Iceland Open
Paleoclimate reconstructions across Iceland provide a template for past changes in climate across the northern North Atlantic, a crucial region due to its position relative to the global northward heat transport system and its vulnerabilit…
View article: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic Open
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as “shrubification”, has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification.…
View article: Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic Open
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as ‘shrubification,’ has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification.…
View article: Delayed postglacial colonization of <i>Betula</i> in Iceland and the circum North Atlantic
Delayed postglacial colonization of <i>Betula</i> in Iceland and the circum North Atlantic Open
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as “shrubification”, has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification.…
View article: Regional precipitation variability modulates Holocene fire history of Iceland
Regional precipitation variability modulates Holocene fire history of Iceland Open
We present the first continuous Holocene fire record of Iceland from a lacustrine archive in the northeast region. We use pyrogenic PAHs (polycyclic aromatic hydrocarbons) to trace shifts in fire regimes, paired to a continuous record of n…
View article: Biomarker characterization of the North Water Polynya, Baffin Bay: implications for local sea ice and temperature proxies
Biomarker characterization of the North Water Polynya, Baffin Bay: implications for local sea ice and temperature proxies Open
The North Water Polynya (NOW, Inuktitut: Sarvarjuaq; Kalaallisut: Pikialasorsuaq), Baffin Bay, is the largest polynya and one of the most productive regions in the Arctic. This area of thin to absent sea ice is a critical moisture source f…
View article: Reply on RC2
Reply on RC2 Open
Abstract. The Vedde Ash, first described in Norway and dated to ~12000 cal a BP, has been taken to represent tephra derived from a large eruption of the Katla volcano in Iceland and dispersed across the North Atlantic and Europe. However, …