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Dukhovskoy, D.; Johnson, M.; Proshutinsky, A. | ||||
| Title | Arctic decadal variability from an idealized atmosphere-ice-ocean model: 2. Simulation of decadal oscillations | Type | $loc['typeJournal Article'] | ||
| Year | 2006 | Publication | Journal of Geophysical Research | Abbreviated Journal | J. Geophys. Res. |
| Volume | 111 | Issue | C6 | Pages | |
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| ISSN | 0148-0227 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 436 | ||
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| Author |
Dukhovskoy, D.; Johnson, M.; Proshutinsky, A. | ||||
| Title | Arctic decadal variability from an idealized atmosphere-ice-ocean model: 1. Model description, calibration, and validation | Type | $loc['typeJournal Article'] | ||
| Year | 2006 | Publication | Journal of Geophysical Research | Abbreviated Journal | J. Geophys. Res. |
| Volume | 111 | Issue | C6 | Pages | |
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| ISSN | 0148-0227 | ISBN | Medium | ||
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| Funding | NSF | Approved | $loc['no'] | ||
| Call Number | COAPS @ mfield @ | Serial | 437 | ||
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| Author |
Dukhovskoy, D.S.; Myers, P.G.; Platov, G.; Timmermans, M.-L.; Curry, B.; Proshutinsky, A.; Bamber, J.L.; Chassignet, E.; Hu, X.; Lee, C.M.; Somavilla, R. | ||||
| Title | Greenland freshwater pathways in the sub-Arctic Seas from model experiments with passive tracers | Type | $loc['typeJournal Article'] | ||
| Year | 2016 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | 121 | Issue | 1 | Pages | 877-907 |
| Keywords | Greenland Ice Sheet melting; Greenland freshwater; thermohaline circulation; Nordic Seas; sub-Arctic seas; Baffin Bay; Labrador Sea | ||||
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| ISSN | 2169-9275 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 35 | ||
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| Author |
Dukhovskoy, D.S.; Ubnoske, J.; Blanchard-Wrigglesworth, E.; Hiester, H.R.; Proshutinsky, A. | ||||
| Title | Skill metrics for evaluation and comparison of sea ice models | Type | $loc['typeJournal Article'] | ||
| Year | 2015 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | 120 | Issue | 9 | Pages | 5910-5931 |
| Keywords | sea ice model; sea ice model validation; model skill assessment | ||||
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| ISSN | 2169-9275 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 101 | ||
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| Author |
Dukhovskoy, D.S.; Yashayaev, I.; Proshutinsky, A.; Bamber, J.L.; Bashmachnikov, I.L.; Chassignet, E.P.; Lee, C.M.; Tedstone, A.J. | ||||
| Title | Role of Greenland Freshwater Anomaly in the Recent Freshening of the Subpolar North Atlantic | Type | $loc['typeJournal Article'] | ||
| Year | 2019 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | 124 | Issue | 5 | Pages | 3333-3360 |
| Keywords | Greenland ice sheet melting; freshwater anomaly; subpolar North Atlantic; subpolar gyre; passive tracer numerical experiment; freshwater budget | ||||
| Abstract | The cumulative Greenland freshwater flux anomaly has exceeded 5000 km3 since the 1990s. The volume of this surplus fresh water is expected to cause substantial freshening in the North Atlantic. Analysis of hydrographic observations in the subpolar seas reveal freshening signals in the 2010s. The sources of this freshening are yet to be determined. In this study, the relationship between the surplus Greenland freshwater flux and this freshening is tested by analyzing the propagation of the Greenland freshwater anomaly and its impact on salinity in the subpolar North Atlantic based on observational data and numerical experiments with and without the Greenland runoff. A passive tracer is continuously released during the simulations at freshwater sources along the coast of Greenland to track the Greenland freshwater anomaly. Tracer budget analysis shows that 44% of the volume of the Greenland freshwater anomaly is retained in the subpolar North Atlantic by the end of the simulation. This volume is sufficient to cause strong freshening in the subpolar seas if it stays in the upper 50�100 m. However, in the model the anomaly is mixed down to several hundred meters of the water column resulting in smaller magnitudes of freshening compared to the observations. Therefore, the simulations suggest that the accelerated Greenland melting would not be sufficient to cause the observed freshening in the subpolar seas and other sources of fresh water have contributed to the freshening. Impacts on salinity in the subpolar seas of the freshwater transport through Fram Strait and precipitation are discussed. | ||||
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| ISSN | 2169-9275 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 1029 | ||
| Permanent link to this record | |||||
| Author |
Proshutinsky, A.; Dukhovskoy, D.; Timmermans, M.-L.; Krishfield, R.; Bamber, J.L. | ||||
| Title | Arctic circulation regimes | Type | $loc['typeJournal Article'] | ||
| Year | 2015 | Publication | Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences | Abbreviated Journal | Philos Trans A Math Phys Eng Sci |
| Volume | 373 | Issue | 2052 | Pages | |
| Keywords | arctic climate variability; circulation regimes; freshwater and heat content | ||||
| Abstract | Between 1948 and 1996, mean annual environmental parameters in the Arctic experienced a well-pronounced decadal variability with two basic circulation patterns: cyclonic and anticyclonic alternating at 5 to 7 year intervals. During cyclonic regimes, low sea-level atmospheric pressure (SLP) dominated over the Arctic Ocean driving sea ice and the upper ocean counterclockwise; the Arctic atmosphere was relatively warm and humid, and freshwater flux from the Arctic Ocean towards the subarctic seas was intensified. By contrast, during anticylonic circulation regimes, high SLP dominated driving sea ice and the upper ocean clockwise. Meanwhile, the atmosphere was cold and dry and the freshwater flux from the Arctic to the subarctic seas was reduced. Since 1997, however, the Arctic system has been under the influence of an anticyclonic circulation regime (17 years) with a set of environmental parameters that are atypical for this regime. We discuss a hypothesis explaining the causes and mechanisms regulating the intensity and duration of Arctic circulation regimes, and speculate how changes in freshwater fluxes from the Arctic Ocean and Greenland impact environmental conditions and interrupt their decadal variability. | ||||
| Address | School of Geographical Sciences, University of Bristol, Bristol, UK | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1364-503X | ISBN | Medium | ||
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| Funding | PMID:26347536; PMCID:PMC4607701 | Approved | $loc['no'] | ||
| Call Number | COAPS @ mfield @ | Serial | 109 | ||
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| Author |
Proshutinsky, A.; Krishfield, R.; Toole, J.M.; Timmermans, M.-L.; Williams, W.; Zimmermann, S.; Yamamoto-Kawai, M.; Armitage, T.W.K.; Dukhovskoy, D.; Golubeva, E.; Manucharyan, G.E.; Platov, G.; Watanabe, E.; Kikuchi, T.; Nishino, S.; Itoh, M.; Kang, S.-H.; Cho, K.-H.; Tateyama, K.; Zhao, J. | ||||
| Title | Analysis of the Beaufort Gyre Freshwater Content in 2003-2018 | Type | $loc['typeJournal Article'] | ||
| Year | 2019 | Publication | Abbreviated Journal | J Geophys Res Oceans | |
| Volume | 124 | Issue | 12 | Pages | |
| Keywords | Arctic Ocean; Beaufort Gyre; circulation; climate change; freshwater balance; modeling | ||||
| Abstract | Hydrographic data collected from research cruises, bottom-anchored moorings, drifting Ice-Tethered Profilers, and satellite altimetry in the Beaufort Gyre region of the Arctic Ocean document an increase of more than 6,400 km(3) of liquid freshwater content from 2003 to 2018: a 40% growth relative to the climatology of the 1970s. This fresh water accumulation is shown to result from persistent anticyclonic atmospheric wind forcing (1997-2018) accompanied by sea ice melt, a wind-forced redirection of Mackenzie River discharge from predominantly eastward to westward flow, and a contribution of low salinity waters of Pacific Ocean origin via Bering Strait. Despite significant uncertainties in the different observations, this study has demonstrated the synergistic value of having multiple diverse datasets to obtain a more comprehensive understanding of Beaufort Gyre freshwater content variability. For example, Beaufort Gyre Observational System (BGOS) surveys clearly show the interannual increase in freshwater content, but without satellite or Ice-Tethered Profiler measurements, it is not possible to resolve the seasonal cycle of freshwater content, which in fact is larger than the year-to-year variability, or the more subtle interannual variations. | ||||
| Address | Physical Oceanography Laboratory Ocean University of China, Qingdao China | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 2169-9275 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | strtoupper('3').strtolower('2055432'); strtoupper('P').strtolower('MC7003849') | Approved | $loc['no'] | ||
| Call Number | COAPS @ user @ | Serial | 1097 | ||
| Permanent link to this record | |||||
| Author |
Proshutinsky, A.; Krishfield, R.; Toole, J.M.; Timmermans, M.-L.; Williams, W.; Zimmermann, S.; Yamamoto-Kawai, M.; Armitage, T.W.K.; Dukhovskoy, D.; Golubeva, E.; Manucharyan, G.E.; Platov, G.; Watanabe, E.; Kikuchi, T.; Nishino, S.; Itoh, M.; Kang, S.-H.; Cho, K.-H.; Tateyama, K.; Zhao, J. | ||||
| Title | Analysis of the Beaufort Gyre Freshwater Content in 2003-2018 | Type | $loc['typeJournal Article'] | ||
| Year | 2019 | Publication | Abbreviated Journal | J Geophys Res Oceans | |
| Volume | 124 | Issue | 12 | Pages | 9658-9689 |
| Keywords | Arctic Ocean; Beaufort Gyre; circulation; climate change; freshwater balance; modeling | ||||
| Abstract | Hydrographic data collected from research cruises, bottom-anchored moorings, drifting Ice-Tethered Profilers, and satellite altimetry in the Beaufort Gyre region of the Arctic Ocean document an increase of more than 6,400 km(3) of liquid freshwater content from 2003 to 2018: a 40% growth relative to the climatology of the 1970s. This fresh water accumulation is shown to result from persistent anticyclonic atmospheric wind forcing (1997-2018) accompanied by sea ice melt, a wind-forced redirection of Mackenzie River discharge from predominantly eastward to westward flow, and a contribution of low salinity waters of Pacific Ocean origin via Bering Strait. Despite significant uncertainties in the different observations, this study has demonstrated the synergistic value of having multiple diverse datasets to obtain a more comprehensive understanding of Beaufort Gyre freshwater content variability. For example, Beaufort Gyre Observational System (BGOS) surveys clearly show the interannual increase in freshwater content, but without satellite or Ice-Tethered Profiler measurements, it is not possible to resolve the seasonal cycle of freshwater content, which in fact is larger than the year-to-year variability, or the more subtle interannual variations. | ||||
| Address | Physical Oceanography Laboratory Ocean University of China, Qingdao China | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 2169-9275 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | strtoupper('3').strtolower('2055432'); strtoupper('P').strtolower('MC7003849') | Approved | $loc['no'] | ||
| Call Number | COAPS @ user @ | Serial | 1102 | ||
| Permanent link to this record | |||||
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