Holocene precipitation seasonality on Svalbard and in Northern Fennoscandia reconstructed using organic geochemical and stable isotope proxies
The Arctic experiences faster climate change than the global average. Feedback mechanisms between the atmosphere, cryosphere and the oceans amplify the warming, and intensify the water cycle. Arctic precipitation is projected to increase because of enhanced winter evaporation due to diminishing sea...
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
UiT Norges arktiske universitet
2022
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/26641 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/26641 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 Isotope Geochemistry Quaternary Geology Paleoclimatology VDP::Mathematics and natural science: 400::Geosciences: 450::Hydrology: 454 Precipitation seasonality VDP::Mathematics and natural science: 400::Geosciences: 450 Arctic climate DOKTOR-004 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 Isotope Geochemistry Quaternary Geology Paleoclimatology VDP::Mathematics and natural science: 400::Geosciences: 450::Hydrology: 454 Precipitation seasonality VDP::Mathematics and natural science: 400::Geosciences: 450 Arctic climate DOKTOR-004 Kjellman, Sofia Elisabeth Holocene precipitation seasonality on Svalbard and in Northern Fennoscandia reconstructed using organic geochemical and stable isotope proxies |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 Isotope Geochemistry Quaternary Geology Paleoclimatology VDP::Mathematics and natural science: 400::Geosciences: 450::Hydrology: 454 Precipitation seasonality VDP::Mathematics and natural science: 400::Geosciences: 450 Arctic climate DOKTOR-004 |
description |
The Arctic experiences faster climate change than the global average. Feedback mechanisms between the atmosphere, cryosphere and the oceans amplify the warming, and intensify the water cycle. Arctic precipitation is projected to increase because of enhanced winter evaporation due to diminishing sea ice, increased poleward moisture transport in summer, and increased atmospheric moisture content in summer and early fall. Large model uncertainties and different seasonal expressions of these processes emphasize the need to improve our understanding of long-term spatial and temporal variability in the water cycle. Stable isotope ratios of oxygen and hydrogen (δ 18 O and δ 2 H) in precipitation are sensitive to the conditions at the moisture source, atmospheric temperature, and the moisture travel history, and are therefore widely used tracers of past and current changes in the water cycle. This study focuses on two aspects of water isotope proxies: 1) reconstructing Holocene precipitation seasonality on Svalbard using δ 2 H of sedimentary leaf wax n -alkanoic acids from four lakes, and 2) exploring the variable influence of precipitation seasonality and evaporation on the modern isotopic variability of lake waters in northern Fennoscandia. We find that summer precipitation variability across Svalbard follows changes in summer insolation and temperature, whereas the seasonal distribution of precipitation on northern Svalbard is controlled by regional ocean surface conditions, with more winter precipitation during periods of strong Atlantic water advection and reduced sea-ice cover. Varying lake hydrology impacted the seasonality reflected in the aquatic leaf waxes; therefore, a good understanding of the individual lake systems is crucial for robust proxy interpretations. In northern Fennoscandia, both coastal and inland lakes are sensitive to distillation during moisture transport, and lakes farther from the Norwegian Sea are, additionally, affected by evaporation. The inflow isotopic composition is influenced by ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Kjellman, Sofia Elisabeth |
author_facet |
Kjellman, Sofia Elisabeth |
author_sort |
Kjellman, Sofia Elisabeth |
title |
Holocene precipitation seasonality on Svalbard and in Northern Fennoscandia reconstructed using organic geochemical and stable isotope proxies |
title_short |
Holocene precipitation seasonality on Svalbard and in Northern Fennoscandia reconstructed using organic geochemical and stable isotope proxies |
title_full |
Holocene precipitation seasonality on Svalbard and in Northern Fennoscandia reconstructed using organic geochemical and stable isotope proxies |
title_fullStr |
Holocene precipitation seasonality on Svalbard and in Northern Fennoscandia reconstructed using organic geochemical and stable isotope proxies |
title_full_unstemmed |
Holocene precipitation seasonality on Svalbard and in Northern Fennoscandia reconstructed using organic geochemical and stable isotope proxies |
title_sort |
holocene precipitation seasonality on svalbard and in northern fennoscandia reconstructed using organic geochemical and stable isotope proxies |
publisher |
UiT Norges arktiske universitet |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/26641 |
long_lat |
ENVELOPE(-126.826,-126.826,54.858,54.858) |
geographic |
Arctic Svalbard Norwegian Sea Four Lakes |
geographic_facet |
Arctic Svalbard Norwegian Sea Four Lakes |
genre |
Arctic Arctic Climate change Fennoscandia Norwegian Sea Sea ice Svalbard |
genre_facet |
Arctic Arctic Climate change Fennoscandia Norwegian Sea Sea ice Svalbard |
op_relation |
Paper I: Kjellman, S.E., Schomacker, A., Thomas, E.K., Håkansson, L., Duboscq, S., Cluett, A.A., … Ingólfsson, Ó. (2020). Holocene precipitation seasonality in northern Svalbard: influence of sea ice and regional ocean surface conditions. Quaternary Science Reviews, 240 , 1063882. Also available in Munin at https://hdl.handle.net/10037/18874 . Paper II: Kjellman, S.E., Thomas, E.K. & Schomacker, A. (2022). Arctic and sub-Arctic lake water δ 2 H and δ 18 O along a coastal-inland transect: implications for interpreting water isotope proxy records. Journal of Hydrology, 607 , 127556. Also available in Munin at https://hdl.handle.net/10037/24643 . Paper III: Kjellman, S.E., Thomas, E.K., Schomacker, A., Farnsworth, W.R., Cowling, O.C., Allaart, L., & Brynjólfsson, S. Holocene precipitation seasonality along a climatic gradient from western Spitsbergen to Nordaustlandet, Svalbard. (Manuscript in review). Data related to Paper I are freely available at the NOAA/World Data Service for Paleoclimatology website: Kjellman, S.E., Schomacker, A., Thomas, E.K., Hakansson, L., Duboscq, S., Cluett, A.A., … Ingolfsson, O. (2020). NOAA/WDS Paleoclimatology - Lake Austre Nevlingen, Svalbard 12,000 Year Biomarker and Geochemical Data. NOAA National Centers for Environmental Information . https://doi.org/10.25921/kxxn-4d50 . Data related to Paper II are freely available in the Supplementary Information and in the Water Isotopes Database at Waterisotopes.org (Project IDs 00292 (surface waters) and 00293 (precipitation)). 978-82-8236-486-7 (trykt) 978-82-8236-487-4 (digitalt) https://hdl.handle.net/10037/26641 |
op_rights |
embargoedAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.25921/kxxn-4d50 |
_version_ |
1766302125883654144 |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/26641 2023-05-15T14:28:00+02:00 Holocene precipitation seasonality on Svalbard and in Northern Fennoscandia reconstructed using organic geochemical and stable isotope proxies Kjellman, Sofia Elisabeth 2022-09-23 https://hdl.handle.net/10037/26641 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway Paper I: Kjellman, S.E., Schomacker, A., Thomas, E.K., Håkansson, L., Duboscq, S., Cluett, A.A., … Ingólfsson, Ó. (2020). Holocene precipitation seasonality in northern Svalbard: influence of sea ice and regional ocean surface conditions. Quaternary Science Reviews, 240 , 1063882. Also available in Munin at https://hdl.handle.net/10037/18874 . Paper II: Kjellman, S.E., Thomas, E.K. & Schomacker, A. (2022). Arctic and sub-Arctic lake water δ 2 H and δ 18 O along a coastal-inland transect: implications for interpreting water isotope proxy records. Journal of Hydrology, 607 , 127556. Also available in Munin at https://hdl.handle.net/10037/24643 . Paper III: Kjellman, S.E., Thomas, E.K., Schomacker, A., Farnsworth, W.R., Cowling, O.C., Allaart, L., & Brynjólfsson, S. Holocene precipitation seasonality along a climatic gradient from western Spitsbergen to Nordaustlandet, Svalbard. (Manuscript in review). Data related to Paper I are freely available at the NOAA/World Data Service for Paleoclimatology website: Kjellman, S.E., Schomacker, A., Thomas, E.K., Hakansson, L., Duboscq, S., Cluett, A.A., … Ingolfsson, O. (2020). NOAA/WDS Paleoclimatology - Lake Austre Nevlingen, Svalbard 12,000 Year Biomarker and Geochemical Data. NOAA National Centers for Environmental Information . https://doi.org/10.25921/kxxn-4d50 . Data related to Paper II are freely available in the Supplementary Information and in the Water Isotopes Database at Waterisotopes.org (Project IDs 00292 (surface waters) and 00293 (precipitation)). 978-82-8236-486-7 (trykt) 978-82-8236-487-4 (digitalt) https://hdl.handle.net/10037/26641 embargoedAccess Copyright 2022 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 Isotope Geochemistry Quaternary Geology Paleoclimatology VDP::Mathematics and natural science: 400::Geosciences: 450::Hydrology: 454 Precipitation seasonality VDP::Mathematics and natural science: 400::Geosciences: 450 Arctic climate DOKTOR-004 Doctoral thesis Doktorgradsavhandling 2022 ftunivtroemsoe https://doi.org/10.25921/kxxn-4d50 2022-09-07T23:00:14Z The Arctic experiences faster climate change than the global average. Feedback mechanisms between the atmosphere, cryosphere and the oceans amplify the warming, and intensify the water cycle. Arctic precipitation is projected to increase because of enhanced winter evaporation due to diminishing sea ice, increased poleward moisture transport in summer, and increased atmospheric moisture content in summer and early fall. Large model uncertainties and different seasonal expressions of these processes emphasize the need to improve our understanding of long-term spatial and temporal variability in the water cycle. Stable isotope ratios of oxygen and hydrogen (δ 18 O and δ 2 H) in precipitation are sensitive to the conditions at the moisture source, atmospheric temperature, and the moisture travel history, and are therefore widely used tracers of past and current changes in the water cycle. This study focuses on two aspects of water isotope proxies: 1) reconstructing Holocene precipitation seasonality on Svalbard using δ 2 H of sedimentary leaf wax n -alkanoic acids from four lakes, and 2) exploring the variable influence of precipitation seasonality and evaporation on the modern isotopic variability of lake waters in northern Fennoscandia. We find that summer precipitation variability across Svalbard follows changes in summer insolation and temperature, whereas the seasonal distribution of precipitation on northern Svalbard is controlled by regional ocean surface conditions, with more winter precipitation during periods of strong Atlantic water advection and reduced sea-ice cover. Varying lake hydrology impacted the seasonality reflected in the aquatic leaf waxes; therefore, a good understanding of the individual lake systems is crucial for robust proxy interpretations. In northern Fennoscandia, both coastal and inland lakes are sensitive to distillation during moisture transport, and lakes farther from the Norwegian Sea are, additionally, affected by evaporation. The inflow isotopic composition is influenced by ... Doctoral or Postdoctoral Thesis Arctic Arctic Climate change Fennoscandia Norwegian Sea Sea ice Svalbard University of Tromsø: Munin Open Research Archive Arctic Svalbard Norwegian Sea Four Lakes ENVELOPE(-126.826,-126.826,54.858,54.858) |