Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores
Nitrate records from six Greenland ice cores covering the period 1789 to 1995 show a significant correlation in concentration for averaging periods greater than 10 years, as well as an approximately 60% increase in average concentration during the last 75 years. Annual nitrate fluxes contain low-fre...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
eScholarship, University of California
2006
|
Subjects: | |
Online Access: | http://www.escholarship.org/uc/item/13t206mq |
id |
ftcdlib:qt13t206mq |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:qt13t206mq 2023-05-15T16:27:59+02:00 Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores Burkhart, JF Bales, RC McConnell, JR Hutterli, MA 2006-11-27 application/pdf http://www.escholarship.org/uc/item/13t206mq english eng eScholarship, University of California qt13t206mq http://www.escholarship.org/uc/item/13t206mq public Burkhart, JF; Bales, RC; McConnell, JR; & Hutterli, MA. (2006). Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores. Journal of Geophysical Research Atmospheres, 111(22). doi:10.1029/2005JD006771. UC Merced: Retrieved from: http://www.escholarship.org/uc/item/13t206mq article 2006 ftcdlib https://doi.org/10.1029/2005JD006771 2018-07-13T22:52:13Z Nitrate records from six Greenland ice cores covering the period 1789 to 1995 show a significant correlation in concentration for averaging periods greater than 10 years, as well as an approximately 60% increase in average concentration during the last 75 years. Annual nitrate fluxes contain low-frequency trends driven primarily by changes in concentration, while higher-frequency variability is driven by changes in snow accumulation. Increases in concentration yield nearly 30% higher nitrate flux (2.5 to 3.2 μg m -2 yr -1 ) and an 11% increase in variability during the 1895 to 1994 period versus the prior 100 years. Nitrate trends in the cores during the last 100 years are also correlated with global nitrate emissions, with a highly significant average r value of 0.93 for the six cores. During the period of anthropogenic influence, nitrate is positively correlated with the North Atlantic Oscillation, while prior to that the correlation is negative, and less significant, suggesting a link between transport of anthropogenic emissions and the North Atlantic Oscillation. Significant preanthropogenic periodicities identified through singular spectrum analysis show decadal variability in the nitrate record leading to shifts as great as 30% from the mean state but none as great as the anthropogenic-driven deviation. Copyright 2006 by the American Geophysical Union. Article in Journal/Newspaper Greenland Greenland ice cores North Atlantic North Atlantic oscillation University of California: eScholarship Greenland Journal of Geophysical Research 111 D22 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
Nitrate records from six Greenland ice cores covering the period 1789 to 1995 show a significant correlation in concentration for averaging periods greater than 10 years, as well as an approximately 60% increase in average concentration during the last 75 years. Annual nitrate fluxes contain low-frequency trends driven primarily by changes in concentration, while higher-frequency variability is driven by changes in snow accumulation. Increases in concentration yield nearly 30% higher nitrate flux (2.5 to 3.2 μg m -2 yr -1 ) and an 11% increase in variability during the 1895 to 1994 period versus the prior 100 years. Nitrate trends in the cores during the last 100 years are also correlated with global nitrate emissions, with a highly significant average r value of 0.93 for the six cores. During the period of anthropogenic influence, nitrate is positively correlated with the North Atlantic Oscillation, while prior to that the correlation is negative, and less significant, suggesting a link between transport of anthropogenic emissions and the North Atlantic Oscillation. Significant preanthropogenic periodicities identified through singular spectrum analysis show decadal variability in the nitrate record leading to shifts as great as 30% from the mean state but none as great as the anthropogenic-driven deviation. Copyright 2006 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Burkhart, JF Bales, RC McConnell, JR Hutterli, MA |
spellingShingle |
Burkhart, JF Bales, RC McConnell, JR Hutterli, MA Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores |
author_facet |
Burkhart, JF Bales, RC McConnell, JR Hutterli, MA |
author_sort |
Burkhart, JF |
title |
Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores |
title_short |
Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores |
title_full |
Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores |
title_fullStr |
Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores |
title_full_unstemmed |
Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores |
title_sort |
influence of north atlantic oscillation on anthropogenic transport recorded in northwest greenland ice cores |
publisher |
eScholarship, University of California |
publishDate |
2006 |
url |
http://www.escholarship.org/uc/item/13t206mq |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores North Atlantic North Atlantic oscillation |
genre_facet |
Greenland Greenland ice cores North Atlantic North Atlantic oscillation |
op_source |
Burkhart, JF; Bales, RC; McConnell, JR; & Hutterli, MA. (2006). Influence of North Atlantic Oscillation on anthropogenic transport recorded in northwest Greenland ice cores. Journal of Geophysical Research Atmospheres, 111(22). doi:10.1029/2005JD006771. UC Merced: Retrieved from: http://www.escholarship.org/uc/item/13t206mq |
op_relation |
qt13t206mq http://www.escholarship.org/uc/item/13t206mq |
op_rights |
public |
op_doi |
https://doi.org/10.1029/2005JD006771 |
container_title |
Journal of Geophysical Research |
container_volume |
111 |
container_issue |
D22 |
_version_ |
1766017593877987328 |