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Vinayachandran, P. N.; Davidson, Fraser; Chassignet, E. P. | ||||
| Title | Towards joint assessments, modern capabilities and new links for ocean prediction systems | Type | $loc['typeJournal Article'] | ||
| Year | 2020 | Publication | Bulletin of the American Meteorological Society | Abbreviated Journal | Bull. Amer. Meteor. Soc. |
| Volume | 101 | Issue | 4 | Pages | |
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| Abstract | Approximately 260 individuals from forecasting centers, research laboratories, academia, and industry representing 40 countries met to discuss recent developments in operational oceanography and brainstorm about the future directions of ocean prediction services. | ||||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 1091 | ||
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| Author |
Wallcraft, A.J.; Kara, A.B.; Hurlburt, H.E.; Chassignet, E.P.; Halliwell, G.H. | ||||
| Title | Value of bulk heat flux parameterizations for ocean SST prediction | Type | $loc['typeJournal Article'] | ||
| Year | 2008 | Publication | Journal of Marine Systems | Abbreviated Journal | Journal of Marine Systems |
| Volume | 74 | Issue | 1-2 | Pages | 241-258 |
| Keywords | Bulk heat fluxes; Ocean model SST; Exchange coefficients; Atmospheric forcing; Climate | ||||
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| ISSN | 0924-7963 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 405 | ||
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| Author |
Winterbottom, H.R.; Chassignet, E.P. | ||||
| Title | A vortex isolation and removal algorithm for numerical weather prediction model tropical cyclone applications | Type | $loc['typeJournal Article'] | ||
| Year | 2011 | Publication | Journal of Advances in Modeling Earth Systems | Abbreviated Journal | J. Adv. Model. Earth Syst. |
| Volume | 3 | Issue | 4 | Pages | |
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| ISSN | 1942-2466 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 313 | ||
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| Author |
Winterbottom, H.R.; Uhlhorn, E.W.; Chassignet, E.P. | ||||
| Title | A design and an application of a regional coupled atmosphere-ocean model for tropical cyclone prediction | Type | $loc['typeJournal Article'] | ||
| Year | 2012 | Publication | Journal of Advances in Modeling Earth Systems | Abbreviated Journal | J. Adv. Model. Earth Syst. |
| Volume | 4 | Issue | 4 | Pages | |
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| ISSN | 1942-2466 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 237 | ||
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| Author |
Wu, Z.; Chassignet, E.P.; Ji, F.; Huang, J. | ||||
| Title | Reply to 'Spatiotemporal patterns of warming' | Type | $loc['typeJournal Article'] | ||
| Year | 2014 | Publication | Nature Climate Change | Abbreviated Journal | Nature Climate change |
| Volume | 4 | Issue | 10 | Pages | 846-848 |
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| ISSN | 1758-678X | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 151 | ||
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| Author |
Xu, X.; Bower, A.; Furey, H.; Chassignet, E.P. | ||||
| Title | Variability of the Iceland-Scotland Overflow Water Transport Through the Charlie-Gibbs Fracture Zone: Results From an Eddying Simulation and Observations | Type | $loc['typeJournal Article'] | ||
| Year | 2018 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | 123 | Issue | 8 | Pages | 5808-5823 |
| Keywords | Iceland; Scotland overflow water; Charlie; Gibbs fracture zone; variability; volume transport; eddying simulation | ||||
| Abstract | Observations show that the westward transport of the Iceland‐Scotland overflow water (ISOW) through the Charlie‐Gibbs Fracture Zone (CGFZ) is highly variable. This study examines (a) where this variability comes from and (b) how it is related to the variability of ISOW transport at upstream locations in the Iceland Basin and other ISOW flow pathways. The analyses are based on a 35‐year 1/12° eddying Atlantic simulation that represents well the main features of the observed ISOW in the area of interest, in particular, the transport variability through the CGFZ. The results show that (a) the variability of the ISOW transport is closely correlated with that of the barotropic transports in the CGFZ associated with the meridional displacement of the North Atlantic Current front and is possibly induced by fluctuations of large‐scale zonal wind stress in the Western European Basin east of the CGFZ; (b) the variability of the ISOW transport is increased by a factor of 3 from the northern part of the Iceland Basin to the CGFZ region and transport time series at these two locations are not correlated, further suggesting that the variability at the CGFZ does not come from the upstream source; and (c) the variability of the ISOW transport at the CGFZ is strongly anticorrelated to that of the southward ISOW transport along the eastern flank of the Mid‐Atlantic Ridge, suggesting an out‐of‐phase covarying transport between these two ISOW pathways. | ||||
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| ISSN | 2169-9275 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 952 | ||
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| Author |
Xu, X.; Bower, A.; Furey, H.; Chassignet, E.P. | ||||
| Title | Variability of the Iceland-Scotland Overflow Water Transport Through the Charlie-Gibbs Fracture Zone: Results From an Eddying Simulation and Observations | Type | $loc['typeJournal Article'] | ||
| Year | 2018 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | Issue | 8 | Pages | ||
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| Abstract | Observations show that the westward transport of the Iceland‐Scotland overflow water (ISOW) through the Charlie‐Gibbs Fracture Zone (CGFZ) is highly variable. This study examines (a) where this variability comes from and (b) how it is related to the variability of ISOW transport at upstream locations in the Iceland Basin and other ISOW flow pathways. The analyses are based on a 35‐year 1/12° eddying Atlantic simulation that represents well the main features of the observed ISOW in the area of interest, in particular, the transport variability through the CGFZ. The results show that (a) the variability of the ISOW transport is closely correlated with that of the barotropic transports in the CGFZ associated with the meridional displacement of the North Atlantic Current front and is possibly induced by fluctuations of large‐scale zonal wind stress in the Western European Basin east of the CGFZ; (b) the variability of the ISOW transport is increased by a factor of 3 from the northern part of the Iceland Basin to the CGFZ region and transport time series at these two locations are not correlated, further suggesting that the variability at the CGFZ does not come from the upstream source; and (c) the variability of the ISOW transport at the CGFZ is strongly anticorrelated to that of the southward ISOW transport along the eastern flank of the Mid‐Atlantic Ridge, suggesting an out‐of‐phase covarying transport between these two ISOW pathways. | ||||
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| ISSN | 2169-9275 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 1023 | ||
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| Author |
Xu, X.; Chassignet, E.P., Wang, F. | ||||
| Title | On the variability of the Atlantic meridional overturning circulation transports in coupled CMIP5 simulations | Type | $loc['typeJournal Article'] | ||
| Year | 2018 | Publication | Climate Dynamics | Abbreviated Journal | Clim Dyn. |
| Volume | 51 | Issue | 11 | Pages | 6511-6531 |
| Keywords | NAO-AMOC; CMIP5; NAO index; AMOC index; meridional pressure gradient; magnitude; structure change of the NAO. | ||||
| Abstract | The Atlantic meridional overturning circulation (AMOC) plays a fundamental role in the climate system, and long-term climate simulations are used to understand the AMOC variability and to assess its impact. This study examines the basic characteristics of the AMOC variability in 44 CMIP5 (Phase 5 of the Coupled Model Inter-comparison Project) simulations, using the 18 atmospherically-forced CORE-II (Phase 2 of the Coordinated Ocean-ice Reference Experiment) simulations as a reference. The analysis shows that on interannual and decadal timescales, the AMOC variability in the CMIP5 exhibits a similar magnitude and meridional coherence as in the CORE-II simulations, indicating that the modeled atmospheric variability responsible for AMOC variability in the CMIP5 is in reasonable agreement with the CORE-II forcing. On multidecadal timescales, however, the AMOC variability is weaker by a factor of more than 2 and meridionally less coherent in the CMIP5 than in the CORE-II simulations. The CMIP5 simulations also exhibit a weaker long-term atmospheric variability in the North Atlantic Oscillation (NAO). However, one cannot fully attribute the weaker AMOC variability to the weaker variability in NAO because, unlike the CORE-II simulations, the CMIP5 simulations do not exhibit a robust NAO-AMOC linkage. While the variability of the wintertime heat flux and mixed layer depth in the western subpolar North Atlantic is strongly linked to the AMOC variability, the NAO variability is not. | ||||
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| Call Number | COAPS @ rl18 @ | Serial | 981 | ||
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| Author |
Xu, X.; Chassignet, E.P.; Firing, Y.L.; Donohue, K. | ||||
| Title | Antarctic Circumpolar Current transport through Drake Passage: What can we learn from comparing high-resolution model results to observations? | Type | $loc['typeJournal Article'] | ||
| Year | 2020 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | 125 | Issue | 7 | Pages | |
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| Abstract | Uncertainty exists in the time‐mean total transport of the Antarctic Circumpolar Current (ACC), the world�s strongest ocean current. The two most recent observational programs in Drake Passage, DRAKE and cDrake, yielded transports of 141 and 173.3 Sv, respectively. In this paper, we use a realistic 1/12° global ocean simulation to interpret these observational estimates and reconcile their differences. We first show that the modeled ACC transport in the upper 1000 m is in excellent agreement with repeat shipboard acoustic Doppler current profiler (SADCP) transects and that the exponentially decaying transport profile in the model is consistent with the profile derived from repeat hydrographic data. By further comparing the model results to the cDrake and DRAKE observations, we argue that the modeled 157.3 Sv transport, i.e. approximately the average of the cDrake and DRAKE estimates, is actually representative of the time‐mean ACC transport through the Drake Passage. The cDrake experiment overestimated the barotropic contribution in part because the array undersampled the deep recirculation southwest of the Shackleton Fracture Zone, whereas the surface geostrophic currents used in the DRAKE estimate yielded a weaker near‐surface transport than implied by the SADCP data. We also find that the modeled baroclinic and barotropic transports are not correlated, thus monitoring either baroclinic or barotropic transport alone may be insufficient to assess the temporal variability of the total ACC transport. | ||||
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| Call Number | COAPS @ user @ | Serial | 1107 | ||
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| Author |
Xu, X.; Chassignet, E.P.; Johns, W.E.; Schmitz Jr, W.J.; Metzger, E.J. | ||||
| Title | Intraseasonal to interannual variability of the Atlantic meridional overturning circulation from eddy-resolving simulations and observations | Type | $loc['typeJournal Article'] | ||
| Year | 2014 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | 119 | Issue | 8 | Pages | 5140-5159 |
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| ISSN | 2169-9275 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 152 | ||
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