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...
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ftawi:oai:epic.awi.de:39643 2024-09-15T18:08:35+00:00 Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium Weissbach, Stefanie Wegner, Anna Opel, Thomas Oerter, Hans Vinther, B. M. Kipfstuhl, Sepp 2016-02-03 application/pdf https://epic.awi.de/id/eprint/39643/ https://epic.awi.de/id/eprint/39643/1/cp-12-171-2016.pdf https://hdl.handle.net/10013/epic.46817 https://hdl.handle.net/10013/epic.46817.d001 unknown COPERNICUS GESELLSCHAFT MBH https://epic.awi.de/id/eprint/39643/1/cp-12-171-2016.pdf https://hdl.handle.net/10013/epic.46817.d001 Weissbach, S. , Wegner, A. , Opel, T. orcid:0000-0003-1315-8256 , Oerter, H. , Vinther, B. M. and Kipfstuhl, S. (2016) Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium , Climate of the Past, 12 , pp. 171-188 . doi:10.5194/cp-12-171-2016 <https://doi.org/10.5194/cp-12-171-2016> , hdl:10013/epic.46817 EPIC3Climate of the Past, COPERNICUS GESELLSCHAFT MBH, 12, pp. 171-188, ISSN: 1814-9324 Article isiRev 2016 ftawi https://doi.org/10.5194/cp-12-171-2016 2024-06-24T04:13:16Z 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Climate of the Past 12 2 171 188 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 |
Weissbach, Stefanie Wegner, Anna Opel, Thomas Oerter, Hans Vinther, B. M. Kipfstuhl, Sepp |
spellingShingle |
Weissbach, Stefanie Wegner, Anna Opel, Thomas Oerter, Hans Vinther, B. M. Kipfstuhl, Sepp Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium |
author_facet |
Weissbach, Stefanie Wegner, Anna Opel, Thomas Oerter, Hans Vinther, B. M. Kipfstuhl, Sepp |
author_sort |
Weissbach, Stefanie |
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 GESELLSCHAFT MBH |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/39643/ https://epic.awi.de/id/eprint/39643/1/cp-12-171-2016.pdf https://hdl.handle.net/10013/epic.46817 https://hdl.handle.net/10013/epic.46817.d001 |
genre |
Greenland Ice Sheet NGRIP North Greenland |
genre_facet |
Greenland Ice Sheet NGRIP North Greenland |
op_source |
EPIC3Climate of the Past, COPERNICUS GESELLSCHAFT MBH, 12, pp. 171-188, ISSN: 1814-9324 |
op_relation |
https://epic.awi.de/id/eprint/39643/1/cp-12-171-2016.pdf https://hdl.handle.net/10013/epic.46817.d001 Weissbach, S. , Wegner, A. , Opel, T. orcid:0000-0003-1315-8256 , Oerter, H. , Vinther, B. M. and Kipfstuhl, S. (2016) Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium , Climate of the Past, 12 , pp. 171-188 . doi:10.5194/cp-12-171-2016 <https://doi.org/10.5194/cp-12-171-2016> , hdl:10013/epic.46817 |
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_ |
1810445954035220480 |