Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium
We present for the first time all 12 δ18O records obtained from ice cores drilled in the framework of the North Greenland Traverse (NGT) between 1993 and 1995 in northern Greenland. The cores cover an area of 680 km × 317 km, 10 % of the Greenland ice sheet. Depending on core length (100–175 m) and...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2016
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-12-171-2016 http://www.clim-past.net/12/171/2016/cp-12-171-2016.pdf https://doaj.org/article/3c50aa66606e451697284eb6f21dfb19 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:3c50aa66606e451697284eb6f21dfb19 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:3c50aa66606e451697284eb6f21dfb19 2023-05-15T16:24:51+02:00 Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium S. Weißbach A. Wegner T. Opel H. Oerter B. M. Vinther S. Kipfstuhl 2016-02-01 https://doi.org/10.5194/cp-12-171-2016 http://www.clim-past.net/12/171/2016/cp-12-171-2016.pdf https://doaj.org/article/3c50aa66606e451697284eb6f21dfb19 en eng Copernicus Publications 1814-9324 1814-9332 doi:10.5194/cp-12-171-2016 http://www.clim-past.net/12/171/2016/cp-12-171-2016.pdf https://doaj.org/article/3c50aa66606e451697284eb6f21dfb19 undefined Climate of the Past, Vol 12, Iss 2, Pp 171-188 (2016) anthro-bio geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.5194/cp-12-171-2016 2023-01-22T19:11:10Z We present for the first time all 12 δ18O records obtained from ice cores drilled in the framework of the North Greenland Traverse (NGT) between 1993 and 1995 in northern Greenland. The cores cover an area of 680 km × 317 km, 10 % of the Greenland ice sheet. Depending on core length (100–175 m) and accumulation rate (90–200 kg m−2 a−1) the single records reflect an isotope–temperature history over the last 500–1100 years. Lowest δ18O mean values occur north of the summit and east of the main divide as a consequence of Greenland's topography. In general, ice cores drilled on the main ice divide show different results than those drilled east of the main ice divide that might be influenced by secondary regional moisture sources. A stack of all NGT records and the NGRIP record is presented with improved signal-to-noise ratio. Compared to single records, this stack represents the mean δ18O signal for northern Greenland that is interpreted as proxy for temperature. Our northern Greenland δ18O stack indicates distinctly enriched δ18O values during medieval times, about AD 1420 ± 20 and from AD 1870 onwards. The period between AD 1420 and AD 1850 has depleted δ18O values compared to the average for the entire millennium and represents the Little Ice Age. The δ18O values of the 20th century are comparable to the medieval period but are lower than that about AD 1420. Article in Journal/Newspaper Greenland Ice Sheet NGRIP North Greenland Unknown Greenland Climate of the Past 12 2 171 188 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
anthro-bio geo |
spellingShingle |
anthro-bio geo S. Weißbach A. Wegner T. Opel H. Oerter B. M. Vinther S. Kipfstuhl Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium |
topic_facet |
anthro-bio geo |
description |
We present for the first time all 12 δ18O records obtained from ice cores drilled in the framework of the North Greenland Traverse (NGT) between 1993 and 1995 in northern Greenland. The cores cover an area of 680 km × 317 km, 10 % of the Greenland ice sheet. Depending on core length (100–175 m) and accumulation rate (90–200 kg m−2 a−1) the single records reflect an isotope–temperature history over the last 500–1100 years. Lowest δ18O mean values occur north of the summit and east of the main divide as a consequence of Greenland's topography. In general, ice cores drilled on the main ice divide show different results than those drilled east of the main ice divide that might be influenced by secondary regional moisture sources. A stack of all NGT records and the NGRIP record is presented with improved signal-to-noise ratio. Compared to single records, this stack represents the mean δ18O signal for northern Greenland that is interpreted as proxy for temperature. Our northern Greenland δ18O stack indicates distinctly enriched δ18O values during medieval times, about AD 1420 ± 20 and from AD 1870 onwards. The period between AD 1420 and AD 1850 has depleted δ18O values compared to the average for the entire millennium and represents the Little Ice Age. The δ18O values of the 20th century are comparable to the medieval period but are lower than that about AD 1420. |
format |
Article in Journal/Newspaper |
author |
S. Weißbach A. Wegner T. Opel H. Oerter B. M. Vinther S. Kipfstuhl |
author_facet |
S. Weißbach A. Wegner T. Opel H. Oerter B. M. Vinther S. Kipfstuhl |
author_sort |
S. Weißbach |
title |
Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium |
title_short |
Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium |
title_full |
Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium |
title_fullStr |
Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium |
title_full_unstemmed |
Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium |
title_sort |
spatial and temporal oxygen isotope variability in northern greenland – implications for a new climate record over the past millennium |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/cp-12-171-2016 http://www.clim-past.net/12/171/2016/cp-12-171-2016.pdf https://doaj.org/article/3c50aa66606e451697284eb6f21dfb19 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet NGRIP North Greenland |
genre_facet |
Greenland Ice Sheet NGRIP North Greenland |
op_source |
Climate of the Past, Vol 12, Iss 2, Pp 171-188 (2016) |
op_relation |
1814-9324 1814-9332 doi:10.5194/cp-12-171-2016 http://www.clim-past.net/12/171/2016/cp-12-171-2016.pdf https://doaj.org/article/3c50aa66606e451697284eb6f21dfb19 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-12-171-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
2 |
container_start_page |
171 |
op_container_end_page |
188 |
_version_ |
1766013447224426496 |