The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations
Variations in the Arctic Oscillation (AO) and its regional manifestation, the North Atlantic Oscillation (NAO), generate much of the nonseasonal variability in the winter climate over the Northern Hemisphere midlatitudes. Despite being an internal mode of the atmosphere, the Arctic and North Atlanti...
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ftcdlib:qt87m0t31n 2023-05-15T14:26:22+02:00 The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations Allen, R. J Zender, C. S 2011-08-31 application/pdf http://www.escholarship.org/uc/item/87m0t31n english eng eScholarship, University of California qt87m0t31n http://www.escholarship.org/uc/item/87m0t31n Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Allen, R. J; & Zender, C. S. (2011). The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations. Journal of Geophysical Research, 116(D16). doi:10.1029/2010JD015311. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/87m0t31n Physical Sciences and Mathematics Southern oscillation geopotential height temperature-fields hemisphere winter stationary waves central Eurasia large-ensemble climate-change cover reanalysis article 2011 ftcdlib https://doi.org/10.1029/2010JD015311 2016-04-02T18:56:18Z Variations in the Arctic Oscillation (AO) and its regional manifestation, the North Atlantic Oscillation (NAO), generate much of the nonseasonal variability in the winter climate over the Northern Hemisphere midlatitudes. Despite being an internal mode of the atmosphere, the Arctic and North Atlantic Oscillations (N/AO) exhibit a slightly red spectrum, varying on quasi-biennial (2-3 years) and quasi-decadal time scales. Such low-frequency variability is likely due to the coupling of the atmosphere to boundary conditions and/or external forcings. Here we show that Eurasian snow cover, particularly over eastern Siberia (ESB), exhibits quasi-biennial persistence similar to the N/AO. Furthermore, the snow-AO mechanism operates on quasi-biennial timescales, with fall ESB snow cover significantly related to vertically propagating Rossby wave activity and the N/AO for the next two to three winters. On the basis of land surface model simulations from the Global Land Data Assimilation System (GLDAS), the interseasonal carryover of ESB snow is related to soil moisture anomalies and an evaporation-convection feedback. These findings suggest quasi-biennial persistence of the N/AO is partly due to land surface forcing in the form of both ESB snow and soil moisture anomalies. Article in Journal/Newspaper Arctic Arctic Climate change North Atlantic North Atlantic oscillation Siberia University of California: eScholarship Arctic Journal of Geophysical Research 116 D16 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Physical Sciences and Mathematics Southern oscillation geopotential height temperature-fields hemisphere winter stationary waves central Eurasia large-ensemble climate-change cover reanalysis |
spellingShingle |
Physical Sciences and Mathematics Southern oscillation geopotential height temperature-fields hemisphere winter stationary waves central Eurasia large-ensemble climate-change cover reanalysis Allen, R. J Zender, C. S The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations |
topic_facet |
Physical Sciences and Mathematics Southern oscillation geopotential height temperature-fields hemisphere winter stationary waves central Eurasia large-ensemble climate-change cover reanalysis |
description |
Variations in the Arctic Oscillation (AO) and its regional manifestation, the North Atlantic Oscillation (NAO), generate much of the nonseasonal variability in the winter climate over the Northern Hemisphere midlatitudes. Despite being an internal mode of the atmosphere, the Arctic and North Atlantic Oscillations (N/AO) exhibit a slightly red spectrum, varying on quasi-biennial (2-3 years) and quasi-decadal time scales. Such low-frequency variability is likely due to the coupling of the atmosphere to boundary conditions and/or external forcings. Here we show that Eurasian snow cover, particularly over eastern Siberia (ESB), exhibits quasi-biennial persistence similar to the N/AO. Furthermore, the snow-AO mechanism operates on quasi-biennial timescales, with fall ESB snow cover significantly related to vertically propagating Rossby wave activity and the N/AO for the next two to three winters. On the basis of land surface model simulations from the Global Land Data Assimilation System (GLDAS), the interseasonal carryover of ESB snow is related to soil moisture anomalies and an evaporation-convection feedback. These findings suggest quasi-biennial persistence of the N/AO is partly due to land surface forcing in the form of both ESB snow and soil moisture anomalies. |
format |
Article in Journal/Newspaper |
author |
Allen, R. J Zender, C. S |
author_facet |
Allen, R. J Zender, C. S |
author_sort |
Allen, R. J |
title |
The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations |
title_short |
The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations |
title_full |
The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations |
title_fullStr |
The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations |
title_full_unstemmed |
The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations |
title_sort |
role of eastern siberian snow and soil moisture anomalies in quasi-biennial persistence of the arctic and north atlantic oscillations |
publisher |
eScholarship, University of California |
publishDate |
2011 |
url |
http://www.escholarship.org/uc/item/87m0t31n |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Climate change North Atlantic North Atlantic oscillation Siberia |
genre_facet |
Arctic Arctic Climate change North Atlantic North Atlantic oscillation Siberia |
op_source |
Allen, R. J; & Zender, C. S. (2011). The role of eastern Siberian snow and soil moisture anomalies in quasi-biennial persistence of the Arctic and North Atlantic Oscillations. Journal of Geophysical Research, 116(D16). doi:10.1029/2010JD015311. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/87m0t31n |
op_relation |
qt87m0t31n http://www.escholarship.org/uc/item/87m0t31n |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2010JD015311 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
D16 |
_version_ |
1766298887362969600 |