Arctic moisture source for Eurasian snow cover variations in autumn

Wegmann, Martin; Orsolini, Yvan; Vázquez, M.; Gimeno, Luis; Bulygina, Olga; Jaiser, Ralf; Handorf, Dörthe; Rinke, Annette; Dethloff, Klaus; Sterin, Alexander; Brönnimann, Stefan

doi:10.1088/1748-9326/10/5/054015

Cited by 85 publications

(79 citation statements)

References 43 publications

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“…However, for these months some moisture contribution appears affecting continental areas, especially over northern Eurasia. This result is in agreement with previous publications that suggest an influence from the Arctic over Eurasia (Liu et al, 2012;Wegmann et al, 2015). Wegmann et al (2015) have suggested a relation between the increased moisture evaporation over Barents and Kara Sea and higher snow precipitation over Siberia in autumn.…”

Section: Discussionsupporting

confidence: 94%

“…This result is in agreement with previous publications that suggest an influence from the Arctic over Eurasia (Liu et al, 2012;Wegmann et al, 2015). Wegmann et al (2015) have suggested a relation between the increased moisture evaporation over Barents and Kara Sea and higher snow precipitation over Siberia in autumn. Despite form our results such relation cannot be addressed, some moisture contribution can be found from these seas (Figs.…”

Section: Discussionsupporting

confidence: 94%

“…Recent results point to a link between sea ice reduction and extreme winter weather conditions in some Northern Hemisphere mid-latitudes regions (Wegmann et al, 2015;Cohen et al, 2014;Liu et al, 2012). Moreover, a number of authors have highlighted a relationship between the decrease in sea ice and an increase in winter snowfall over Siberia (Wegmann et al, 2015;Liu et al, 2012;Park et al, 2012), but with the opposite relationship applying over North America, and in general at the hemispheric scale (Park et al, 2012). So, there is a lack of consensus today on the link sea ice reduction-extreme winter weather depending on the analyzed region and much of the methods used to analyze the linkages.…”

Section: Introductionmentioning

confidence: 99%

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Moisture transport from the Arctic: a characterization from a Lagrangian perspective

Vázquez

Nieto

Drumond

et al. 2018

CIG

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The Arctic Ocean has suffered extreme reductions in sea ice in recent decades, and these observed changes suggest implications in terms of moisture transport. The Arctic region is a net sink of moisture in terms of the total hydrological cycle, however, its role as a moisture source for specific regions has not been extensively studied. Our results show that 80% of the moisture supply from the Arctic contributes to precipitation over itself, representing about 8% of the global moisture supply to the Arctic, the remaining 20% is distributed in the surrounding. A reduction in the sea ice extent could make the Arctic Ocean a slightly higher source of moisture to itself or to the surrounding areas. The analysis of the areas affected by Arctic moisture transport is important for establishing those areas vulnerable to change in a framework of a growing sea ice decline. To this end, the Lagrangian model FLEXPART was used in this work to establish the main sinks for the Arctic Ocean, focusing on the moisture transport from this region. The results suggest that most of the moisture loss occurs locally over the Arctic Ocean itself, especially in summer. Some moisture contribution from the Arctic Ocean to continental areas in North America and Eurasia is also noted in autumn and winter especially from Central Arctic, the East Siberian Sea, the Laptev, Kara, Barents, East Greenland and Bering Seas, and the Sea of Okhotsk.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Moisture transport from the Arctic: a characterization from a Lagrangian perspective

Vázquez

Nieto

Drumond

et al. 2018

CIG

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“…The size of the target regions in this study (Arctic region and subregions) is bigger than in many of the regions where the same methodology was used in previous studies (e.g. Ramos et al, 2016or Wegmann et al, 2015 and the average number of particles by source that reach the target regions high enough daily (see Table S1 in the Supplement).…”

Section: Estimation Of the Lagrangian Moisture Transport From The Maimentioning

confidence: 96%

A new pattern of the moisture transport for precipitation related to the drastic decline in Arctic sea ice extent

2018

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Abstract. In this study we use the term moisture transport for precipitation for a target region as the moisture coming to this region from its major moisture sources resulting in precipitation over the target region (MTP). We have identified changes in the pattern of moisture transport for precipitation over the Arctic region, the Arctic Ocean, and its 13 main subdomains concurrent with the major sea ice decline that occurred in 2003. The pattern consists of a general decrease in moisture transport in summer and enhanced moisture transport in autumn and early winter, with different contributions depending on the moisture source and ocean subregion. The pattern is statistically significant and consistent with changes in the vertically integrated moisture fluxes and frequency of circulation types. The results of this paper also reveal that the assumed and partially documented enhanced poleward moisture transport from lower latitudes as a consequence of increased moisture from climate change seems to be less simple and constant than typically recognised in relation to enhanced Arctic precipitation throughout the year in the present climate.

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“…Moreover, the duration of the winter sea ice cover in the White Sea, south of the Kola Peninsula, has declined by about 10 days per decade since 1979 (Parkinson 2014). Anomalously low sea ice extent in the Barents Sea, particularly during winter, leads to higher turbulent heat fluxes that warm the region diabatically (e.g., Serreze et al 2011) and has led to changes in regional circulation patterns ) and snow cover (Wegmann et al 2015). Composite analysis by Inoue et al (2012) revealed that reduced ice in the Barents Sea is associated with a blocking high (anticyclone) over the Siberian coast, which results in a northward expansion and deepening of the climatological Siberian high (SH) pressure.…”

Section: Introductionmentioning

confidence: 99%

Climate Change in the Kola Peninsula, Arctic Russia, during the Last 50 Years from Meteorological Observations

2016

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The authors provide a detailed climatology and evaluation of recent climate change in the Kola Peninsula, Arctic Russia, a region influenced by both the North Atlantic and Arctic Oceans. The analysis is based on 50 years of monthly surface air temperature (SAT), precipitation (PPN), and sea level pressure (SLP) data from 10 meteorological stations for 1966-2015. Regional mean annual SAT is ;08C: the moderating effect of the ocean is such that coastal (inland) stations have a positive (negative) value. Examined mean annual PPN totals rise from ;430 mm in the northeast of the region to ;600 mm in the west. Annual SAT in the Kola Peninsula has increased by 2.38 6 1.08C over the past 50 years. Seasonally, statistically significant warming has taken place in spring and fall, although the largest trend has occurred in winter. Although there has been no significant change in annual PPN, spring has become significantly wetter and fall drier. The former is associated with the only significant seasonal SLP trend (decrease). A positive winter North Atlantic Oscillation (NAO) index is generally associated with a warmer and wetter Kola Peninsula whereas a positive Siberian high (SH) index has the opposite impact. The relationship between both the NAO and SH and the SAT is broadly coherent across the region whereas their relationship with PPN varies markedly, although none of the relationships is temporally invariant. Reduced sea ice in the Barents and White Seas and associated circulation changes are likely to be the principal drivers behind the observed changes.

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Arctic moisture source for Eurasian snow cover variations in autumn

Cited by 85 publications

References 43 publications

Moisture transport from the Arctic: a characterization from a Lagrangian perspective

Moisture transport from the Arctic: a characterization from a Lagrangian perspective

A new pattern of the moisture transport for precipitation related to the drastic decline in Arctic sea ice extent

Climate Change in the Kola Peninsula, Arctic Russia, during the Last 50 Years from Meteorological Observations

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