Changes in Arctic moisture transport over the North Pacific associated with sea ice loss

McGraw, Marie C.; Baggett, Cory F.; Liu, Chengji; Mundhenk, Bryan D.

doi:10.1007/s00382-019-05011-9

Cited by 4 publications

(4 citation statements)

References 82 publications

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“…The modeled deepening AL with decreased sea ice is consistent with projections of AL behavior under increased global warming, although these projections generally show that the low-pressure center also shifts to the north (56)(57)(58)(59). While the center of intense low pressure does not appear to migrate northward in the simulations used in this study (Fig.…”

Section: Implications For Arctic and North Pacific Ocean−atmosphere Circulationsupporting

confidence: 80%

“…The contemporaneous occurrence of a strengthened AL and an increase in Arctic sea ice at ∼4 ka implies the presence of a teleconnection between the North Pacific and western Arctic during the Holocene. Such Pacific−Arctic teleconnections, which have the potential to drive climatic changes in both Arctic Alaska and lower latitudes, have been suggested in numerous studies focused on the 20th to 21st centuries and future climate (6,8,(56)(57)(58)(59)(60)(61). Several of these studies associate reduced Arctic sea ice with an intensified and northward-shifted AL (56)(57)(58)(59), while others associate it with a weakened and/or westwardshifted AL (6,8,60,61).…”

Section: Implications For Arctic and North Pacific Ocean−atmosphere Circulationmentioning

confidence: 94%

“…Holocene and a warmer world (5). This connection between North Pacific SLP and the hemispheric temperature gradient might explain the increase in moisture at these higher latitudes (56,59), driven by the northward spread of low pressure, as midlatitudinal moisture decreases (5). It is therefore possible the connection between the AL and Arctic sea ice is related not only to future increases in Arctic moisture but also to future decreases in midlatitudinal moisture, as both these features of Northern Hemisphere hydroclimate have been demonstrated during periods of Holocene sea ice decline.…”

Section: Implications For Arctic and North Pacific Ocean−atmosphere Circulationmentioning

confidence: 98%

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Coupled impacts of sea ice variability and North Pacific atmospheric circulation on Holocene hydroclimate in Arctic Alaska

Broadman

Kaufman

Henderson

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Arctic Alaska lies at a climatological crossroads between the Arctic and North Pacific Oceans. The modern hydroclimate of the region is responding to rapidly diminishing sea ice, driven in part by changes in heat flux from the North Pacific. Paleoclimate reconstructions have improved our knowledge of Alaska’s hydroclimate, but no studies have examined Holocene sea ice, moisture, and ocean−atmosphere circulation in Arctic Alaska, limiting our understanding of the relationship between these phenomena in the past. Here we present a sedimentary diatom assemblage and diatom isotope dataset from Schrader Pond, located ∼80 km from the Arctic Ocean, which we interpret alongside synthesized regional records of Holocene hydroclimate and sea ice reduction scenarios modeled by the Hadley Centre Coupled Model Version 3 (HadCM3). The paleodata synthesis and model simulations suggest the Early and Middle Holocene in Arctic Alaska were characterized by less sea ice, a greater contribution of isotopically heavy Arctic-derived moisture, and wetter climate. In the Late Holocene, sea ice expanded and regional climate became drier. This climatic transition is coincident with a documented shift in North Pacific circulation involving the Aleutian Low at ∼4 ka, suggesting a Holocene teleconnection between the North Pacific and Arctic. The HadCM3 simulations reveal that reduced sea ice leads to a strengthened Aleutian Low shifted west, potentially increasing transport of warm North Pacific water to the Arctic through the Bering Strait. Our findings demonstrate the interconnectedness of the Arctic and North Pacific on multimillennial timescales, and are consistent with future projections of less sea ice and more precipitation in Arctic Alaska.

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Section: Implications For Arctic and North Pacific Ocean−atmosphere Circulationsupporting

confidence: 80%

Section: Implications For Arctic and North Pacific Ocean−atmosphere Circulationmentioning

confidence: 94%

Section: Implications For Arctic and North Pacific Ocean−atmosphere Circulationmentioning

confidence: 98%

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Coupled impacts of sea ice variability and North Pacific atmospheric circulation on Holocene hydroclimate in Arctic Alaska

Broadman

Kaufman

Henderson

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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“…The enhanced low‐level cyclonic circulation off the coast of Siberia also accompanies the trend of southerlies and southwesterlies along 160°E over northeastern Siberia in the HPB experiment (Figure 9a). These trends of the low‐level winds are consistent with previous results indicating that the magnification of poleward atmospheric moisture transport from mid–high latitudes was associated with decrease in SLP attributable to the loss of sea ice (Zhang et al ., 2013; Komatsu et al ., 2018; McGraw et al ., 2020). The SLP dipole pattern in the Arctic Ocean with an anticyclonic circulation pattern on the North American continental side and a cyclonic circulation pattern on the Siberian side were found in both experiments in this study.…”

Section: Discussionmentioning

confidence: 99%

Impacts of global warming on summer precipitation trend over northeastern Eurasia during 1990–2010 using large‐ensemble experiments

Kanamori

Abe

Fujinami

et al. 2022

Intl Journal of Climatology

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Summer precipitation (June-August) increased markedly during the 2000s in Siberia, particularly in eastern Siberia. However, the nature of the mechanism that controlled this increase in precipitation remains under discussion. This study investigated the impacts of global warming on the trend of summer precipitation over northeastern Eurasia using large-ensemble data from historical warming and nonwarming simulations for 1990-2010. Positive summer precipitation trends across Siberia reproduced in the ensemble mean of the historical simulation were similar to the observed data; however, negative trends observed over northeast China and Mongolia were not found in the ensemble mean. To extract members with a pattern of precipitation trend similar to that of the observations, empirical orthogonal function analysis was applied to the summer precipitation trend over Siberia for each simulation. The first leading mode in each simulation showed

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Characteristics of the Arctic Planetary Boundary Layer Height From Multiple Radio Occultations

Chang,

Song,

Feng

et al. 2024

IEEE Trans. Geosci. Remote Sensing

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Changes in Arctic moisture transport over the North Pacific associated with sea ice loss

Cited by 4 publications

References 82 publications

Coupled impacts of sea ice variability and North Pacific atmospheric circulation on Holocene hydroclimate in Arctic Alaska

Coupled impacts of sea ice variability and North Pacific atmospheric circulation on Holocene hydroclimate in Arctic Alaska

Impacts of global warming on summer precipitation trend over northeastern Eurasia during 1990–2010 using large‐ensemble experiments

Characteristics of the Arctic Planetary Boundary Layer Height From Multiple Radio Occultations

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