Article
Meteorology & Atmospheric Sciences
Yiming Guo, Stuart P. Bishop
Summary: In this study, global surface divergent eddy heat fluxes were estimated using remote sensing observations, with a focus on model fidelity assessment and the importance of midlatitudes in heat transport. The model captured similar spatial patterns of fluxes but showed relatively higher values in midlatitudes compared to observations.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Oceanography
William G. Large, Edward G. Patton, Peter P. Sullivan
Summary: Empirical rules for entrainment and detrainment are developed based on LES of the Southern Ocean boundary layer, taking into account turbulence, stratification, and shear, as well as the influence of diurnal variability and Stokes drift. These rules address the failure of downgradient eddy viscosity and provide parameterizations for momentum flux. The response of the boundary layer to diurnal heating includes collapse and growth, with the depth of the boundary layer empirically related to forcing history. Evaluation against LES fluxes shows that flux profiles are more representative of the diurnal cycle, especially with Stokes drift.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Geosciences, Multidisciplinary
J. Mak, D. P. Marshall, G. Madec, J. R. Maddison
Summary: The global ocean overturning circulation is crucial for climate evolution and is sensitive to the mesoscale eddy energy dissipation timescale. This study highlights the importance of constraining uncertainties associated with eddy energy dissipation for climate model projections over centennial timescales and paleoclimate simulations over millennial timescales.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Huaiyu Wei, Yan Wang, Andrew L. Stewart, Julian Mak
Summary: This study investigates the eddy buoyancy diffusivities across continental shelves and slopes using process-oriented simulations. The simulations show that the cross-slope eddy diffusivity varies significantly with topography, and established scaling frameworks accurately reproduce the diagnosed eddy diffusivities. The predictive skills of these scaling frameworks are insensitive to the presence of along-slope topographic corrugations. This work lays a foundation for improving the parameterization of eddy buoyancy fluxes in coarse-resolution ocean models.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Meteorology & Atmospheric Sciences
Fabio Boeira Dias, Catia M. Domingues, Simon J. Marsland, Stephen R. Rintoul, Petteri Uotila, Russell Fiedler, Mauricio M. Mata, Nathaniel L. Bindoff, Abhishek Savita
Summary: The study highlights the influence of surface wind perturbations on the response of the Antarctic subpolar Southern Ocean, leading to enhanced Antarctic Bottom Water formation and accelerated global Meridional Overturning Circulation. Open Water Polynya (OWP) events are triggered by upwelling warm waters and inhibition of sea ice growth, with their availability linked to deep ocean heat reservoirs.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Qiuxian Li, Yiyong Luo, Jian Lu, Fukai Liu
Summary: In response to quadrupled CO2, the Southern Ocean primarily uptakes excess heat around 60 degrees S, which is then redistributed by the northward ocean heat transport (OHT) and mostly stored in the ocean or released back to the atmosphere around 45 degrees S. However, the relative roles of mean ocean circulation and ocean circulation change in the uptake and redistribution of heat in the Southern Ocean remain controversial.
JOURNAL OF CLIMATE
(2022)
Article
Oceanography
Nicholas P. Foukal, Robert S. Pickart
Summary: This study presents the first continuous mooring records of the West Greenland Coastal Current (WGCC), which is a conduit of fresh, buoyant outflow from the Arctic Ocean and the Greenland Ice Sheet. The results show that the WGCC on the southwest Greenland shelf is a distinct current with strong variability in its lateral position. Additionally, the study finds that the WGCC has a similar strength to the East Greenland Coastal Current (EGCC), but transports less liquid freshwater due to its higher salinity.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Article
Oceanography
Xingchi Wang, Tobias Kukulka
Summary: The study investigates the impact of turbulence driven by wind and waves on the transport of heat, momentum, and matter in the ocean surface boundary layer (OSBL). The experiments reveal a three-stage response of the OSBL to abrupt changes in wind direction, with different characteristics such as decreased turbulent kinetic energy (TKE), increased TKE, and eventual relaxation to equilibrium, while Langmuir turbulence (LT) continues to adjust due to slowly developing waves.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Oceanography
Dong Wang, Tobias Kukulka
Summary: This study investigates the dynamics of velocity shear and Reynolds stress in the ocean surface boundary layer for idealized misaligned wind and wave fields using a large-eddy simulation (LES) model. The results suggest that the misalignment between Reynolds stress and Eulerian shear may have an impact on driving upper-ocean currents and accurate turbulence parameterizations in misaligned wind-wave conditions.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Meteorology & Atmospheric Sciences
Chunlei Liu, Yazhu Yang, Xiaoqing Liao, Ning Cao, Jimmy Liu, Niansen Ou, Richard P. Allan, Liang Jin, Ni Chen, Rong Zheng
Summary: The change in ocean net surface heat flux is crucial for the climate system, especially in the North Atlantic. However, there is a large difference in simulated surface heat fluxes due to poorly represented dynamic processes. This study compares various datasets and models to find that increasing model resolution can improve the surface heat flux and heat transport in the North Atlantic.
ADVANCES IN ATMOSPHERIC SCIENCES
(2022)
Article
Engineering, Marine
Wuxin Xiao, Zhou Meng
Summary: Mediterranean eddies play a crucial role in transferring heat, salinity, and momentum into the Atlantic Ocean. This study quantifies the heat flux and lifetime of a Mediterranean eddy, providing insights into how these eddies impact the redistribution of heat and salt in the ocean.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Meteorology & Atmospheric Sciences
Xiaoming Zhai, Zhibin Yang
Summary: It is found that eddies impinging on the western boundary excite boundary waves that propagate equatorward along the western boundary, leading to coherent meridional overturning circulation (MOC) anomalies equatorward of the incident eddy field. The magnitude and duration of eddy-induced MOC anomalies are variable and irregular, with implications for meridional heat transport variability across the latitudes.
Article
Geosciences, Multidisciplinary
Yangyang Liu, Ruoying He, Zhongping Lee
Summary: The study found that using a model based on inherent optical properties for ocean simulation can more accurately predict sea surface temperature, upper ocean thermal structure, and OHC. Validation showed that ocean optical properties and the application of an appropriate solar attenuation model are crucial for forecasting hurricane intensity.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Ecology
Curtis J. Richardson, Neal E. Flanagan, Mengchi Ho
Summary: This study investigates the impact of drainage and hydrologic restoration on carbon budgets in Pocosin Lakes National Wildlife Refuge and adjacent private peatlands in North Carolina. The results show that carbon losses are higher in drained sites and lower in restored sites.
ECOLOGICAL ENGINEERING
(2023)
Article
Environmental Sciences
Timothy H. Morin, William J. Riley, Robert F. Grant, Zelalem Mekonnen, Kay C. Stefanik, A. Camilo Rey Sanchez, Molly A. Mulhare, Jorge Villa, Kelly Wrighton, Gil Bohrer
Summary: Wetland water depth influences microbial and plant communities, which in turn affect the carbon cycling of wetlands. This study used a mechanistic model to simulate different water depth scenarios and analyzed the predicted fluxes of carbon dioxide and methane. The results showed that water depth affects greenhouse gas fluxes and wetland vegetation distribution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)