Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density
Figure 3. Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density. (e) Normalized time serie...
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ftdatacite:10.6084/m9.figshare.1011647.v1 2023-05-15T17:36:48+02:00 Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density Buwen Dong Sutton, Rowan T Woollings, Tim Hodges, Kevin 2013 https://dx.doi.org/10.6084/m9.figshare.1011647.v1 https://iop.figshare.com/articles/figure/_Composite_anomalies_for_a_sea_level_pressure_hPa_b_precipitation_mm_d_sup_1_sup_c_precipitation_wit/1011647/1 unknown IOP Publishing https://dx.doi.org/10.6084/m9.figshare.1011647 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Environmental Science Image Figure graphic ImageObject 2013 ftdatacite https://doi.org/10.6084/m9.figshare.1011647.v1 https://doi.org/10.6084/m9.figshare.1011647 2021-11-05T12:55:41Z Figure 3. Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density. (e) Normalized time series precipitation indices averaged in two regions shown in (b). (f) as (e) but for England and Wales precipitation. Thick line in (a)–(d) outlines regions where anomalies are significant at 90% confidence level using the Student t -test. Abstract The summertime variability of the extratropical storm track over the Atlantic sector and its links to European climate have been analysed for the period 1948–2011 using observations and reanalyses. The main results are as follows. (1) The dominant mode of the summer storm track density variability is characterized by a meridional shift of the storm track between two distinct paths and is related to a bimodal distribution in the climatology for this region. It is also closely related to the Summer North Atlantic Oscillation (SNAO). (2) A southward shift is associated with a downstream extension of the storm track and a decrease in blocking frequency over the UK and northwestern Europe. (3) The southward shift is associated with enhanced precipitation over the UK and northwestern Europe and decreased precipitation over southern Europe (contrary to the behaviour in winter). (4) There are strong ocean–atmosphere interactions related to the dominant mode of storm track variability. The atmosphere forces the ocean through anomalous surface fluxes and Ekman currents, but there is also some evidence consistent with an ocean influence on the atmosphere, and that coupled ocean–atmosphere feedbacks might play a role. The ocean influence on the atmosphere may be particularly important on decadal timescales, related to the Atlantic Multidecadal Oscillation (AMO). Still Image North Atlantic North Atlantic oscillation DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Environmental Science |
spellingShingle |
Environmental Science Buwen Dong Sutton, Rowan T Woollings, Tim Hodges, Kevin Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density |
topic_facet |
Environmental Science |
description |
Figure 3. Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density. (e) Normalized time series precipitation indices averaged in two regions shown in (b). (f) as (e) but for England and Wales precipitation. Thick line in (a)–(d) outlines regions where anomalies are significant at 90% confidence level using the Student t -test. Abstract The summertime variability of the extratropical storm track over the Atlantic sector and its links to European climate have been analysed for the period 1948–2011 using observations and reanalyses. The main results are as follows. (1) The dominant mode of the summer storm track density variability is characterized by a meridional shift of the storm track between two distinct paths and is related to a bimodal distribution in the climatology for this region. It is also closely related to the Summer North Atlantic Oscillation (SNAO). (2) A southward shift is associated with a downstream extension of the storm track and a decrease in blocking frequency over the UK and northwestern Europe. (3) The southward shift is associated with enhanced precipitation over the UK and northwestern Europe and decreased precipitation over southern Europe (contrary to the behaviour in winter). (4) There are strong ocean–atmosphere interactions related to the dominant mode of storm track variability. The atmosphere forces the ocean through anomalous surface fluxes and Ekman currents, but there is also some evidence consistent with an ocean influence on the atmosphere, and that coupled ocean–atmosphere feedbacks might play a role. The ocean influence on the atmosphere may be particularly important on decadal timescales, related to the Atlantic Multidecadal Oscillation (AMO). |
format |
Still Image |
author |
Buwen Dong Sutton, Rowan T Woollings, Tim Hodges, Kevin |
author_facet |
Buwen Dong Sutton, Rowan T Woollings, Tim Hodges, Kevin |
author_sort |
Buwen Dong |
title |
Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density |
title_short |
Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density |
title_full |
Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density |
title_fullStr |
Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density |
title_full_unstemmed |
Composite anomalies for (a) sea level pressure (hPa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in JJA for high minus low PC1 of storm track density |
title_sort |
composite anomalies for (a) sea level pressure (hpa), (b) precipitation (mm d −1 ), (c) precipitation with intensity ranging from 1 to 20 mm d −1 , and (d) rainy days with intensity ranging from 1 to 20 mm d −1 in jja for high minus low pc1 of storm track density |
publisher |
IOP Publishing |
publishDate |
2013 |
url |
https://dx.doi.org/10.6084/m9.figshare.1011647.v1 https://iop.figshare.com/articles/figure/_Composite_anomalies_for_a_sea_level_pressure_hPa_b_precipitation_mm_d_sup_1_sup_c_precipitation_wit/1011647/1 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://dx.doi.org/10.6084/m9.figshare.1011647 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.1011647.v1 https://doi.org/10.6084/m9.figshare.1011647 |
_version_ |
1766136408760647680 |