Spatial response of two European atmospheric circulation classifications (data 1901–2010)

Hoy, Andreas; Jaagus, Jaak; Sepp, Mait; Matschullat, Jörg

doi:10.1007/s00704-012-0707-x

Cited by 17 publications

(13 citation statements)

References 19 publications

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“…The first one occurs in December and January, and the less evident second maximum is recorded in Central Europe in July and August (Keevallik et al 1999;Hoy et al 2012), as well as in East and North Europe from September to October (Chen 2000;Sepp and Jaagus 2002). In East-Central Europe, the second maximum is more evident in autumn, when the frequency of days with south-westerly advection is higher than in summer.…”

Section: Discussionmentioning

confidence: 95%

“…In this group, the best known ones include the Grossweterlagen classification developed for Central Europe (Baur 1937;Hess and Brezowsky 1977;Werner and Gerstengarbe 2010), the Lamb classification referring to the region of the British Islands (Lamb 1972) and the Vangengeim-Girs classification developed for the north-east part of Europe (Vangengeim 1935;Girs 1971). They were used in numerous climatological studies (e.g., Bárdossy and Caspary 1990;Keevallik et al 1999;Kaszewski and Filipiuk 2003;Stehlík and Bárdossy 2003;Ustrnul 2006;Hoy et al 2012Hoy et al , 2013. The assessment of the effect of atmospheric circulation on the variability of atmospheric conditions in Poland frequently involves the application of manual classifications by Osuchowska-Klein (1978) and Niedźwiedź (1981).…”

Section: Introductionmentioning

confidence: 99%

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The main characteristics of atmospheric circulation over East-Central Europe from 1871 to 2010

Bartoszek

2016

Meteorol Atmos Phys

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The main objective of the paper concerns the determination of the annual and multi-annual variability of air flow over East-Central Europe in the period 1871-2010. Daily mean sea-level pressure and values of physical quantities provided the basis for distinguishing 27 circulation types, i.e., eight directional cyclonic, transitional, and anticyclonic types, and one non-directional cyclonic, anticyclonic, and an undefined type. Over the area of EastCentral Europe, the highest frequency is recorded for air flow from the western sector, with a maximum in the period from December to January. In spring, a higher than average frequency of cyclonic and easterly circulation is observed, and in summer-anticyclonic and northerly. Increased zonal circulation was recorded in the years 1910-1930, and particularly after 1970, and eastern at the end of the nineteenth century and in the 1930s and 1940s. An increase in the frequency of days with non-directional anticyclonic type and westerly air flow, and a simultaneous decrease in frequency of days with south-easterly and easterly circulation were observed throughout the study period. Among the three classes of circulation types, the highest persistence (particularly in winter) was recorded for anticyclonic types, i.e., when the high pressure system occurred over the Scandinavian Peninsula or East Europe.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

The main characteristics of atmospheric circulation over East-Central Europe from 1871 to 2010

Bartoszek

2016

Meteorol Atmos Phys

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“…This pattern has also been shown to underlie summer warming on longer timescales in the late Holocene (Della-Marta et al, 2007;Trouet et al, 2012;Yiou et al, 2012). Changes in atmospheric circulation have a significant influence on European climate (Sepp and Jaagus, 2002;van Ulden and van Oldenborgh, 2006;Hoy et al, 2013), but many climate models have difficulty reproducing this aspect of modern climate (van Ulden and van Oldenborgh, 2006;Woollings, 2010;Kjellstrom et al, 2011;Brands et al, 2013). The warming in Europe during the mid-Holocene simulated in climate models differs fundamentally from that shown in the data, and indicates a high sensitivity in models to the effects of the amplified seasonal insolation cycle experienced at this time, showing greater warming (cooling) in summer (winter) in response to increased (decreased) summer (winter) insolation.…”

Section: The Atmospheric Circulationmentioning

confidence: 94%

The influence of atmospheric circulation on the mid-Holocene climate of Europe: a data–model comparison

Mauri

Davis

Collins³

et al. 2014

Clim. Past

113

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Abstract. The atmospheric circulation is a key area of uncertainty in climate model simulations of future climate change, especially in mid-latitude regions such as Europe where atmospheric dynamics have a significant role in climate variability. It has been proposed that the mid-Holocene was characterized in Europe by a stronger westerly circulation in winter comparable with a more positive AO/NAO, and a weaker westerly circulation in summer caused by anticyclonic blocking near Scandinavia. Model simulations indicate at best only a weakly positive AO/NAO, whilst changes in summer atmospheric circulation have not been widely investigated. Here we use a new pollen-based reconstruction of European mid-Holocene climate to investigate the role of atmospheric circulation in explaining the spatial pattern of seasonal temperature and precipitation anomalies. We find that the footprint of the anomalies is entirely consistent with those from modern analogue atmospheric circulation patterns associated with a strong westerly circulation in winter (positive AO/NAO) and a weak westerly circulation in summer associated with anti-cyclonic blocking (positive SCAND). We find little agreement between the reconstructed anomalies and those from 14 GCMs that performed mid-Holocene experiments as part of the PMIP3/CMIP5 project, which show a much greater sensitivity to top-of-the-atmosphere changes in solar insolation. Our findings are consistent with datamodel comparisons on contemporary timescales that indicate that models underestimate the role of atmospheric circulation in recent climate change, whilst also highlighting the importance of atmospheric dynamics in explaining interglacial warming.

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“…Several climate indices are also used in this study, including: (1) The ACI, also known as the Vangengeim-Girs index, calculated based on atmospheric activity in the Atlantic-Eurasia region (Girs 1974;Klyashtorin 1998;Hoy et al 2013); (2) The NPI, defined by Trenberth and Hurrell (1994) as an area-weighted SLP average over (30-65°N, 160°E-140°W); (3) The southern oscillation index (SOI), defined as the leading principal component (PC) of winter SLP anomalies over (40°S-20°N, 90°E-65°W) (this SOI is similar to that defined by Trenberth (1984), as the Tahiti pressure minus the Darwin pressure, and the correlation coefficient between the two is as high as 0.81 during 1871-2003); (4) The eastern Pacific wave train (EPW), defined as the volume average of the seasonal vertical wave activity flux in the domain . This definition of the EPW describes the strength of both the vertical and horizontal fluxes well (Sun and Tan 2013).…”

Section: Datasets and Methodsmentioning

confidence: 99%

A multidecadal oscillation in the northeastern Pacific

Dong

Wang

Yang

et al. 2016

Atmospheric and Oceanic Science Letters

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Downloaded by [113.183.67.87] at 21:25 21 June 2016The internal modes of the North Pacific can lead to climatic oscillations through ocean-atmosphere interactions and induce global climate responses. The best example is the Pacific Decadal Oscillation, but this fails to explain many climate phenomena. Here, another multidecadal variability over the North Pacific is described, found by analyzing reconstructed data covering the past 140 years. It is named the Pacific Multidecadal Oscillation (PMO), with anomalously high/low SSTs over the northeastern Pacific, and a quasi-60-year cycle. Related to this low-frequency variability of SST, the global mean temperature and precipitation present significant interdecadal differences. More importantly, the PMO index leads the global mean surface air temperature and SST by one to three years. The Arctic Oscillation pattern and atmospheric circulations are shown to change substantially with the transition of the PMO mode from positive to negative phases. This multidecadal oscillation improves the prospect for a long-term forecast of the global warming trend, since the PMO bears a remarkable relationship with global temperature. 研究表明北太平洋海洋内部模态能够通过海气相互作用导致气候系统振荡和全球气候响应。最好的例子就是太平洋年代际振荡(PDO) ，但是以往的研究中发现很多气候年代际变化现象用 PDO 没法给与很好的解释。本研究通过分析过去 140 年的资料发现北太平洋区域另外一个多年代际振荡模态，并将其定义为太平洋多年代际振荡(以下简称 PMO) ，其表现为北太平洋白令海峡以南和阿拉斯加湾流区域海表面温度存在 60 年左右周期的异常偏高或者异常偏低。随着海温这一低频振荡的发生，全球气温、降水都表现出显著的年代际异常。更重要的是，PMO 超前全球气温 2-3 年和海温 3-7 年发生转变。与此同时，北极涛动形态和大气环流随着 PMO 正负位相的转变也发生改变。由于 PMO 与全球温度有着很好的关系，因此 PMO 的发现对全球变暖趋势长时间尺度预报的改进有着重要作用。

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Spatial response of two European atmospheric circulation classifications (data 1901–2010)

Cited by 17 publications

References 19 publications

The main characteristics of atmospheric circulation over East-Central Europe from 1871 to 2010

The main characteristics of atmospheric circulation over East-Central Europe from 1871 to 2010

The influence of atmospheric circulation on the mid-Holocene climate of Europe: a data–model comparison

A multidecadal oscillation in the northeastern Pacific

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