Postdoctoral Scholar •
• Quaternary paleoclimate • Lake and marine sediment • Organic geochemistry • Ancient DNA • Tephra
• Quaternary paleoclimate • Lake and marine sediment • Organic geochemistry • Ancient DNA • Tephra
Geological Sciences
Prounouns: he/him
Bio
Education
- PhD: University of Colorado Boulder, 2019
- PhD: University of Iceland, 2019
- BSc: Bates College, 2013
Awards
- RANNIS Doctoral Student Grant, Icelandic Centre for Research, 2016
Teaching
Courses
- GEOL 1030: Introduction to Physical Geology
Instructor - GEOL 4241: Principles of Geomorphology
Teaching Assistant
Publications
A Holocene history of climate, fire, landscape evolution, and human activity in northeastern Iceland
CU Boulder Authors:
Harning, David John
All Authors:
Ardenghi N; Harning DJ; Raberg JH; Holman BR; Thordarson T; Geirsdottir A; Miller GH; Sepulveda J
Published in: Climate of the PastPublication Date: 2024-05-02
Type: Journal Article
BrGDGT lipids in cold regions reflect summer soil temperature and seasonal soil water chemistry
CU Boulder Authors:
Sepúlveda, Julio; Harning, David John
All Authors:
Raberg JH; Crump SE; de Wet G; Harning DJ; Miller GH; Geirsdottir A; Sepulveda J
Published in: Geochimica et Cosmochimica ActaPublication Date: 2024-03-15
Type: Journal Article
Repeated Early Holocene eruptions of Katla, Iceland, limit the temporal resolution of the Vedde Ash
CU Boulder Authors:
Harning, David John
All Authors:
Harning DJ; Thordarson T; Geirsdottir A; Miller GH; Florian CR
Published in: Bulletin of VolcanologyPublication Date: 2023-12-04
Type: Journal Article
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
CU Boulder Authors:
Harning, David John; Sepúlveda, Julio
All Authors:
Published in: eLifeHarning DJ; Sacco S; Anamthawat-Jonsson K; Ardenghi N; Thordarson T; Raberg JH; Sepulveda J; Geirsdottir A; Shapiro B; M...
- Harning DJ
- Sacco S
- Anamthawat-Jonsson K
- Ardenghi N
- Thordarson T
- Raberg JH
- Sepulveda J
- Geirsdottir A
- Shapiro B
- Miller GH
Publication Date: 2023-11-13
Type: Journal Article
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
CU Boulder Authors:
Sepúlveda, Julio; Harning, David John
All Authors:
Harning DJ; Sacco S; Thordarson T; Sepúlveda J; Shapiro B; Geirsdóttir Á; Miller GH
Publication Date: 2023-07-12Type: Journal Article
Delayed postglacial colonization ofBetulain Iceland and the circum North Atlantic
CU Boulder Authors:
Harning, David John; Sepúlveda, Julio
All Authors:
Publication Date: 2023-03-14Harning DJ; Sacco S; Anamthawat-Jónsson K; Ardenghi N; Thordarson T; Raberg JH; Sepúlveda J; Geirsdóttir Á; Shapiro ...
- Harning DJ
- Sacco S
- Anamthawat-Jónsson K
- Ardenghi N
- Thordarson T
- Raberg JH
- Sepúlveda J
- Geirsdóttir Á
- Shapiro B
- Miller GH
Type: Journal Article
Biomarker characterization of the North Water Polynya, Baffin Bay:implications for local sea ice and temperature proxies
All Authors:
Harning DJ; Holman B; Woelders L; Jennings AE; Sepulveda J
Published in: BiogeosciencesPublication Date: 2023-01-16
Type: Journal Article
Recurrent outburst floods and explosive volcanism during the Younger Dryas-Early Holocene deglaciation in south Iceland: evidence from a lacustrine record
CU Boulder Authors:
Harning, David John
All Authors:
Geirsdottir A; Miller GH; Harning DJ; Hannesdottir H; Thordarson T; Jonsdottir I
Published in: Journal of Quaternary SciencePublication Date: 2022-07-01
Type: Journal Article
Revised fractional abundances and warm-season temperatures substantially improve brGDGT calibrations in lake sediments
All Authors:
Raberg JH; Harning DJ; Crump SE; de Wet G; Blumm A; Kopf S; Geirsdottir A; Miller GH; Sepulveda J
Published in: BiogeosciencesPublication Date: 2021-06-17
Type: Journal Article
Response of biological productivity to North Atlantic marine front migration during the Holocene
All Authors:
Harning DJ; Jennings AE; Koseoglu D; Belt ST; Geirsdottir A; Sepulveda J
Published in: Climate of the PastPublication Date: 2021-02-08
Type: Journal Article
Lipid Biomarkers Quantify Holocene Summer Temperature and Ice Cap Sensitivity in Icelandic Lakes
CU Boulder Authors:
Harning, David John; Sepúlveda, Julio
All Authors:
Harning DJ; Curtin L; Geirsdottir A; D'Andrea WJ; Miller GH; Sepulveda J
Published in: Geophysical Research LettersPublication Date: 2020-02-16
Type: Journal Article
Lipid biomarkers quantify Holocene summer temperature and ice cap sensitivity in Icelandic lakes
CU Boulder Authors:
Harning, David John
All Authors:
Miller G; Harning DJ; Geirsdóttir Á; D‘Andrea WA; Sepúlveda; Curtin L
Published in: Geophysical Research LettersPublication Date: 2020-01-01
Type: Journal Article
Marker tephra in Haukadalsvatn lake sediment: A key to the Holocene tephra stratigraphy of northwest Iceland
CU Boulder Authors:
Harning, David John
All Authors:
Harning DJ; Thordarson T; Geirsdottir A; Olafsdottir S; Miller GH
Published in: Quaternary Science Reviews: the international multidisciplinary research and review journalPublication Date: 2019-09-01
Type: Journal Article
Sea Ice Control on Winter Subsurface Temperatures of the North Iceland Shelf During the Little Ice Age: A Tex(86) Calibration Case Study
CU Boulder Authors:
Sepúlveda, Julio; Harning, David John
All Authors:
Harning DJ; Andrews JT; Belt ST; Cabedo-Sanz P; Geirsdottir A; Dildar N; Miller GH; Sepulveda J
Published in: Paleoceanography and PaleoclimatologyPublication Date: 2019-06-01
Type: Journal Article
The onset of neoglaciation in Iceland and the 4.2 ka event
CU Boulder Authors:
Harning, David John
All Authors:
Geirsdottir A; Miller GH; Andrews JT; Harning DJ; Anderson LS; Florian C; Larsen DJ; Thordarson T
Published in: Climate of the PastPublication Date: 2019-01-08
Type: Journal Article
Holocene glacier and climate variations in Vestfiroir, Iceland, from the modeling of Drangajokull ice cap
CU Boulder Authors:
Harning, David John
All Authors:
Published in: Quaternary Science Reviews: the international multidisciplinary research and review journalAnderson LS; Flowers GE; Jarosch AH; Adalgeirsdottir GT; Geirsdottir A; Miller GH; Harning DJ; Thorsteinsson T; Magnusso...
- Anderson LS
- Flowers GE
- Jarosch AH
- Adalgeirsdottir GT
- Geirsdottir A
- Miller GH
- Harning DJ
- Thorsteinsson T
- Magnusson E
- Palsson F
Publication Date: 2018-06-15
Type: Journal Article
Provenance, stratigraphy and chronology of Holocene tephra from Vestfiroir, Iceland
CU Boulder Authors:
Harning, David John
All Authors:
Harning DJ; Thordarson T; Geirsdottir A; Zalzal K; Miller GH
Published in: Quaternary GeochronologyPublication Date: 2018-06-01
Type: Journal Article
Punctuated Holocene climate of Vestfiroir, Iceland, linked to internal/external variables and oceanographic conditions
CU Boulder Authors:
Harning, David John
All Authors:
Harning DJ; Geirsdottir A; Miller GH
Published in: Quaternary Science Reviews: the international multidisciplinary research and review journalPublication Date: 2018-06-01
Type: Journal Article
Climatic control on Icelandic volcanic activity during the mid-Holocene
CU Boulder Authors:
Harning, David John
All Authors:
Harning DJ; Geirsdottir A; Thordarson T; Miller GH
Published in: Geology (Boulder)Publication Date: 2018-05-01
Type: Journal Article
Early Holocene deglaciation of Drangajokull, Vestfiroir, Iceland
CU Boulder Authors:
Harning, David John
All Authors:
Harning DJ; Geirsdottir A; Miller GH; Zalzal K
Published in: Quaternary Science Reviews: the international multidisciplinary research and review journalPublication Date: 2016-12-01
Type: Journal Article
Episodic expansion of Drangajokull, Vestfiroir, Iceland, over the last 3 ka culminating in its maximum dimension during the Little Ice Age
CU Boulder Authors:
Harning, David John
All Authors:
Harning DJ; Geirsdottir A; Miller GH; Anderson L
Published in: Quaternary Science Reviews: the international multidisciplinary research and review journalPublication Date: 2016-11-15
Type: Journal Article