Regional climate signal vs. local noise
In low-accumulation regions, the reliability of delta O-18-derived temperature signals from ice cores within the Holocene is unclear, primarily due to the small climate changes relative to the intrinsic noise of the isotopic signal. In order to learn about the representativity of single ice cores an...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/40838 https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-408385 https://doi.org/10.25932/publishup-40838 https://publishup.uni-potsdam.de/opus4-ubp/files/40838/pmnr500.pdf |
id |
ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:40838 |
---|---|
record_format |
openpolar |
spelling |
ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:40838 2023-05-15T13:30:45+02:00 Regional climate signal vs. local noise Münch, Thomas (Dr.) Kipfstuhl, Sepp Freitag, Johannes Meyer, Hanno Laepple, Thomas 2019-01-17 application/pdf https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/40838 https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-408385 https://doi.org/10.25932/publishup-40838 https://publishup.uni-potsdam.de/opus4-ubp/files/40838/pmnr500.pdf eng eng https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/40838 urn:nbn:de:kobv:517-opus4-408385 https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-408385 https://doi.org/10.25932/publishup-40838 https://publishup.uni-potsdam.de/opus4-ubp/files/40838/pmnr500.pdf https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess CC-BY ddc:550 Mathematisch-Naturwissenschaftliche Fakultät postprint doc-type:article 2019 ftubpotsdam https://doi.org/10.25932/publishup-40838 2022-08-21T22:35:07Z In low-accumulation regions, the reliability of delta O-18-derived temperature signals from ice cores within the Holocene is unclear, primarily due to the small climate changes relative to the intrinsic noise of the isotopic signal. In order to learn about the representativity of single ice cores and to optimise future ice-core-based climate reconstructions, we studied the stable-water isotope composition of firn at Kohnen Station, Dronning Maud Land, Antarctica. Analysing delta O-18 in two 50m long snow trenches allowed us to create an unprecedented, two-dimensional image characterising the isotopic variations from the centimetre to the 100-metre scale. Our results show seasonal layering of the isotopic composition but also high horizontal isotopic variability caused by local stratigraphic noise. Based on the horizontal and vertical structure of the isotopic variations, we derive a statistical noise model which successfully explains the trench data. The model further allows one to determine an upper bound for the reliability of climate reconstructions conducted in our study region at seasonal to annual resolution, depending on the number and the spacing of the cores taken. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land ice core University of Potsdam: publish.UP Dronning Maud Land Kohnen ENVELOPE(0.000,0.000,-75.000,-75.000) Kohnen Station ENVELOPE(0.000,0.000,-75.000,-75.000) |
institution |
Open Polar |
collection |
University of Potsdam: publish.UP |
op_collection_id |
ftubpotsdam |
language |
English |
topic |
ddc:550 Mathematisch-Naturwissenschaftliche Fakultät |
spellingShingle |
ddc:550 Mathematisch-Naturwissenschaftliche Fakultät Münch, Thomas (Dr.) Kipfstuhl, Sepp Freitag, Johannes Meyer, Hanno Laepple, Thomas Regional climate signal vs. local noise |
topic_facet |
ddc:550 Mathematisch-Naturwissenschaftliche Fakultät |
description |
In low-accumulation regions, the reliability of delta O-18-derived temperature signals from ice cores within the Holocene is unclear, primarily due to the small climate changes relative to the intrinsic noise of the isotopic signal. In order to learn about the representativity of single ice cores and to optimise future ice-core-based climate reconstructions, we studied the stable-water isotope composition of firn at Kohnen Station, Dronning Maud Land, Antarctica. Analysing delta O-18 in two 50m long snow trenches allowed us to create an unprecedented, two-dimensional image characterising the isotopic variations from the centimetre to the 100-metre scale. Our results show seasonal layering of the isotopic composition but also high horizontal isotopic variability caused by local stratigraphic noise. Based on the horizontal and vertical structure of the isotopic variations, we derive a statistical noise model which successfully explains the trench data. The model further allows one to determine an upper bound for the reliability of climate reconstructions conducted in our study region at seasonal to annual resolution, depending on the number and the spacing of the cores taken. |
format |
Article in Journal/Newspaper |
author |
Münch, Thomas (Dr.) Kipfstuhl, Sepp Freitag, Johannes Meyer, Hanno Laepple, Thomas |
author_facet |
Münch, Thomas (Dr.) Kipfstuhl, Sepp Freitag, Johannes Meyer, Hanno Laepple, Thomas |
author_sort |
Münch, Thomas (Dr.) |
title |
Regional climate signal vs. local noise |
title_short |
Regional climate signal vs. local noise |
title_full |
Regional climate signal vs. local noise |
title_fullStr |
Regional climate signal vs. local noise |
title_full_unstemmed |
Regional climate signal vs. local noise |
title_sort |
regional climate signal vs. local noise |
publishDate |
2019 |
url |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/40838 https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-408385 https://doi.org/10.25932/publishup-40838 https://publishup.uni-potsdam.de/opus4-ubp/files/40838/pmnr500.pdf |
long_lat |
ENVELOPE(0.000,0.000,-75.000,-75.000) ENVELOPE(0.000,0.000,-75.000,-75.000) |
geographic |
Dronning Maud Land Kohnen Kohnen Station |
geographic_facet |
Dronning Maud Land Kohnen Kohnen Station |
genre |
Antarc* Antarctica Dronning Maud Land ice core |
genre_facet |
Antarc* Antarctica Dronning Maud Land ice core |
op_relation |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/40838 urn:nbn:de:kobv:517-opus4-408385 https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-408385 https://doi.org/10.25932/publishup-40838 https://publishup.uni-potsdam.de/opus4-ubp/files/40838/pmnr500.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.25932/publishup-40838 |
_version_ |
1766011730026037248 |