Dec 16, 2013 · Multidecadal fluctuations in sea ice during the past 150400 years. Original nonsmoothed time series (gray) and multidecadal (50120 years) component (thick line) reconstructed from wavelet decomposition, with regions arranged from west to east:(a) Newfoundland regional winter
We establish a signal of pervasive and persistent multidecadal (~6090 year) fluctuations that is most pronounced in the Greenland Sea and weakens further away. Covariability between sea ice and Atlantic multidecadal variability as represented by the Atlantic Multidecadal Oscillation (AMO) index is evident during the instrumental record AMERICAN METEOROLOGICAL SOCIETY1 1 2 Multidecadal fluctuation of the wintertime Arctic Oscillation pattern and its 3 implication 4 5 Hainan Gong, Lin Wang, Wen Chen, and Debashis Nath 6
1 1 2 Multidecadal fluctuation of the wintertime Arctic Oscillation pattern and its 3 implication 4 5 Hainan Gong, Lin Wang, Wen Chen, and Debashis Nath 6 Arctic Oscillation - an overview ScienceDirect TopicsMay 31, 1993 · The following Arctic Ocean topics are covered in Section S15.4:(1) Arctic Oscillation or Northern Annular Mode, (2) Atlantic Multidecadal Oscillation, (3) variations in Arctic sea ice cover, and (4) variations in Nordic Seas and AW properties, including discussion of long-term trends that might reflect anthropogenically forced climate change.
Aug 14, 2020 · Abstract. Recent studies have found evidence of multidecadal variability in Northern Hemisphere wintertime seasonal forecast skill. Here we assess the robustness of this finding by extending the analysis to a diverse set of ensemble atmospheric model simulations. These simulations differ in either the numerical model or type of initialisation Atlantic Multidecadal Oscillation - an overview The AMO index time series (Figure S15.2) is remarkably similar to multidecadal fluctuations in the Atlantic Water temperature within the Arctic Ocean (Figure S15.13), suggesting a link between the meridional overturning strength and upper ocean temperatures far into the Nordic Seas/Arctic (Polyakov et
Dec 29, 2016 · Importance of combined winter and summer Arctic Oscillation (AO) on September sea ice extent; Forcing of the wintertime atmospheric circulation by the multidecadal fluctuations of the North Atlantic ocean; A connection from Arctic stratospheric ozone to El Niño-Southern oscillation Early start of 20th-century Arctic sea-ice decline Persistent multidecadal (6090 yr) fluctuations have also been found in multicentury historical Atlantic Arctic sea-ice records, covarying with the AMO (Miles et al., 2014), including the historical sea-ice edge data set (6080 yr; Divine and Dick, 2006). Similar multidecadal-scale variability, superimposed on the long-term anthropogenic
Apr 01, 2014 · The AMO footprint is also found in multidecadal fluctuations of intraseasonal weather phenomena such as atmospheric blocking (Häkkinen et al 2011). We investigate the intraseasonal response of the wintertime atmospheric circulation to the AMO by examining the North Atlantic weather regimes in 20CR. Forcing of the wintertime atmospheric circulation by the demonstrates that the multidecadal uctuations of the wintertime North Atlantic Oscillation (NAO) are tied to the AMO, with an opposite-signed relationship between the polarities of the AMO and the NAO. Our statistical analyses suggest that the AMO signal precedes the NAO
Using multicentury proxy records of Arctic sea ice, Miles et al. (2014) have established a signal of multidecadal fluctuations in sea ice extent that may be related to the AMV. Century-scale temperature measurements show the Arctic surface air temperature variability to be significantly associated with AMV ( Johannessen et al. 2016 ). Multidecadal fluctuations of the North Atlantic ocean Multidecadal fluctuations of the North Atlantic ocean and feedback on the winter climate Gudrun Magnusdottir, and Yannick Peings Correlation between decadal fluctuations of the wintertime NAO and the AMV AMV-NAO relationship in observations. AMV-NAO lead-lag correlations AMV-NAO relationship in observations.
The multidecadal regulation of wintertime extreme cold temperatures over Eurasia by the change of the North Atlantic sea surface temperature (SST) from 19501983 (P1) to 19842017 (P2) is examined in this paper. The warm Arcticcold Siberia (WACS) trend pattern shows a distinct interdecadal transition from P1 to P2, which has a footprint of the Atlantic Multidecadal Oscillation (AMO). Winter Eurasian cooling linked with the Atlantic Nov 22, 2017 · Forcing of the wintertime atmospheric circulation by the multidecadal fluctuations of the North Atlantic ocean Warm Arcticcold Siberia:comparing the recent and the early 20th-century Arctic
Gong H, Wang L, Chen W, Nath D (2018) Multidecadal fluctuation of the wintertime Arctic Oscillation pattern and its implication. J Clim 31:55955608 Article Google ScholarMultidecadal Fluctuation of the Wintertime Arctic The multidecadal uctuations in the patterns and teleconnections of the winter mean Arctic Oscillation (AO)areinvestigatedbasedonobservationalandreanalysisdatasets.ResultsshowthattheAtlanticcenterof