Article
Multidisciplinary Sciences
Li-Chiao Wang, Yong-Fu Lin, Chau-Ron Wu
Summary: Long-term reanalysis data were used to investigate the inter-decadal to decadal modulations of the North Equatorial Current (NEC) bifurcation in the Pacific after the early 1990s. It was found that the wind stress curl anomaly (WSCA) in the C-BOX region has been remotely modulated by the Southern Annular Mode (SAM) since the early 1990s, leading to a shift in NEC bifurcation towards the equator.
SCIENTIFIC REPORTS
(2022)
Article
Meteorology & Atmospheric Sciences
Shion Sekizawa, Hisashi Nakamura, Yu Kosaka
Summary: Anomalous convective activity in the tropics influenced by sea surface temperature variability has remote impacts on extratropical climate. The Australian summer monsoon system internal variability affects East Asia and western North Pacific winter climate.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Jia Wu, Song Yang, Chundi Hu, Junbin Wang, Qiaoling Ren
Summary: In recent decades, a novel Pacific-Atlantic seesaw/oscillation influences the sea level pressure anomalies over the northern subtropical region, mainly induced by North Tropical Atlantic sea surface temperature anomalies. This impacts the circulation and convection activities, with implications for early prediction of climate patterns.
ATMOSPHERIC RESEARCH
(2021)
Article
Meteorology & Atmospheric Sciences
Na Li, Ziniu Xiao, Liang Zhao
Summary: This study reveals that the occurrence of long-lived heatwaves is strongly associated with the joint actions of the South Asian high and the western North Pacific subtropical high. A significant interdecadal shift around 2004/05 towards increased heatwave occurrence is consistent with the enhanced subtropical high systems. The study highlights the important roles of large-scale dynamic systems in regional climate extremes and their future changes.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Renguang Wu, Yuqi Wang, Xi Cao
Summary: This study investigates the factors affecting the year-to-year change in the intensity of synoptic-scale variability over the tropical western North Pacific during summer and fall. The study finds that sea surface temperature anomalies in the equatorial Pacific play a key role in modulating the background fields and intensity of synoptic-scale disturbances in the region. Furthermore, the research shows that SST anomalies in the tropical western Pacific have a notable impact on the intensity of synoptic-scale variability in the region. Opposite SST anomalies in different types of years lead to a weak relationship between the TWNP SSV and equatorial eastern Pacific SST.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Hanjie Fan, Bohua Huang, Song Yang, Wenjie Dong
Summary: The study reveals that the Pacific meridional mode has a significant influence on the development of El Nino-Southern Oscillation events and their seasonal predictability. A matched PMM forcing enhances ENSO events, while a mismatched PMM forcing has a damping effect. The PMM acts as a modulator, rather than a trigger, for ENSO events, and its influence is modulated by the preconditioning of the upper-ocean heat content.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Shaohua Chen, Haikun Zhao, Philp J. Klotzbach, Graciela B. Raga, Jian Cao, Chao Wang
Summary: This study reveals distinct decadal regimes in the impact of transbasin variability (TBV) on tropical cyclone frequency (TCF) over the Western North Pacific, Central-Eastern North Pacific, and North Atlantic basins. Changes in the interannual relationship between TBV and TCF are observed over different time periods, likely influenced by large-scale parameters. The interactions between ENSO and the Pacific decadal oscillation are believed to play a role in these observed decadal changes.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Mengxin Pan, Mengqian Lu
Summary: The study introduces a new method to investigate the impact chain of equatorial sea surface temperature patterns on East Asia's summer weather conditions by considering the western North Pacific subtropical high as an anchor. Three predictors were identified, achieving successful prediction of the summer index of the western North Pacific subtropical high, highlighting the complex atmosphere-ocean coupled response.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Multidisciplinary Sciences
Yuma Kawakami, Hideyuki Nakano, L. Shogo Urakawa, Takahiro Toyoda, Kei Sakamoto, Goro Yamanaka, Shusaku Sugimoto
Summary: The ocean responds to atmospheric variations by modulating air-sea momentum and heat exchanges. The impact of cold- and warm-season atmospheric forcing on the upper ocean in the western mid-latitude North Pacific was examined using numerical experiments with an ocean general circulation model. The results indicate that the temporal variations of Kuroshio transport and North Pacific subtropical mode water distribution/temperature are primarily controlled by cold-season atmospheric forcing.
SCIENTIFIC REPORTS
(2023)
Article
Meteorology & Atmospheric Sciences
Mingna Wu, Tianjun Zhou, Xiaolong Chen
Summary: This study found that the uncertainty in the projection of El Nino-related WNPAC primarily comes from nonamplitude change, with a faster (slower) El Nino decaying pace enhancing (weakening) the WNPAC.
JOURNAL OF CLIMATE
(2021)
Article
Geosciences, Multidisciplinary
Sang-Yeob Kim, Young-Oh Kwon, Wonsun Park, Ho Jin Lee
Summary: A regime shift in the formation mechanisms of North Pacific subtropical mode water (NPSTMW) has been observed, with the relative importance of air-sea flux and ocean dynamics (OD) alternating at different timescales. The regime shift is closely related to the meridional and zonal movements of the Aleutian Low.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Chuan-Yang Wang, Xiao-Tong Zheng, Shang-Ping Xie
Summary: This study demonstrates that under global warming, annual variability in precipitation, low-level winds, and sea level pressure over the Indo-western Pacific will intensify. This intensification is primarily attributed to the increased specific humidity, resulting in enhanced precipitation variability. The strengthened large-scale anomalous anticyclone further intensifies the precipitation anomalies. However, the interbasin positive feedback between the anticyclone and northern Indian Ocean SST shows no significant change.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Zhen Lv, Jun-Chao Yang, Xiaopei Lin, Yu Zhang
Summary: This study suggests that the North Atlantic forcing plays a more significant role than the tropical Pacific forcing in the decadal prediction of sea surface temperature (SST) variability in the North Pacific. By removing the North Atlantic forcing, the prediction skill of NP SST decreases, indicating its strong contribution to the long-term prediction. The research emphasizes the need for improving the simulation of the Atlantic trans-basin effect for better predicting NP climate.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Paul B. Goddard, Clay R. Tabor, Tyler R. Jones
Summary: The study used the WAIS Divide ice core to construct a seasonal record of precipitation isotope values from 1980 to 2000, revealing that WAIS seasonal climate variability is driven by factors such as the position and strength of the Amundsen Sea low and the Pacific-South American patterns. The largest year-to-year seasonal anomalies in precipitation isotopes at the WAIS Divide location occur during austral winter due to eastward displacement of the Amundsen Sea low.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
XiaoJing Jia, Chao Zhang, Renguang Wu, QiFeng Qian
Summary: The study found that there was a significant change in the relationship between spring precipitation in southern China and the El Nino-Southern Oscillation from the mid-1980s to the early 2000s, primarily due to the weakening of the western Pacific subtropical high and the influence of sea surface temperature anomalies in the south Indian Ocean.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Hrishikesh A. Chandanpurkar, Tong Lee, Xiaochun Wang, Hong Zhang, Severine Fournier, Ian Fenty, Ichiro Fukumori, Dimitris Menemenlis, Christopher G. Piecuch, John T. Reager, Ou Wang, John Worden
Summary: River discharge has a significant impact on global ocean models, especially in terms of sea surface salinity and sea surface height. This study uses a global daily varying discharge dataset to analyze the effects of nonseasonal discharge on the ocean. The inclusion of nonseasonal discharge improves the model's accuracy near river mouths, particularly in tropical-to-midlatitude regions. The changes in sea surface height associated with nonseasonal discharge can be explained by the effects of salinity on halosteric height.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Meteorology & Atmospheric Sciences
Charles X. Light, Brian K. Arbic, Paige E. Martin, Laurent Brodeau, J. Thomas Farrar, Stephen M. Griffies, Ben P. Kirtman, Lucas C. Laurindo, Dimitris Menemenlis, Andrea Molod, Arin D. Nelson, Ebenezer Nyadjro, Amanda K. O'Rourke, Jay F. Shriver, Leo Siqueira, R. Justin Small, Ehud Strobach
Summary: This paper investigates high-frequency variability of precipitation using various models and methods, and finds that high-resolution models yield results closer to observations. Increasing model grid spacing generally increases high-frequency precipitation variance in climate modeling.
Article
Geosciences, Multidisciplinary
Ehud Strobach, Patrice Klein, Andrea Molod, Abdullah A. Fahad, Atanas Trayanov, Dimitris Menemenlis, Hector Torres
Summary: Results from a new, global, high-resolution earth system simulation show that recurring intermittent wind events in the Gulf Stream region induce strong latent heat bursts above warm Sea Surface Temperature anomalies, associated with small-scale SST fronts. This study highlights the importance of high-resolution modeling for understanding small-scale air-sea interaction phenomena.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Hector S. Torres, Patrice Klein, Eric D'Asaro, Jinbo Wang, Andrew F. Thompson, Lia Siegelman, Dimitris Menemenlis, Ernesto Rodriguez, Alexander Wineteer, Dragana Perkovic-Martin
Summary: Oceanic fronts with small lateral scales contribute significantly to vertical heat fluxes in the global ocean. Short-term frontal dynamics, which were previously obscured by energetic internal gravity waves, can now be recovered and accurately estimated by separating internal gravity waves and frontal dynamics.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Dustin Carroll, Dimitris Menemenlis, Stephanie Dutkiewicz, Jonathan M. Lauderdale, Jess F. Adkins, Kevin W. Bowman, Holger Brix, Ian Fenty, Michelle M. Gierach, Chris Hill, Oliver Jahn, Peter Landschuetzer, Manfredi Manizza, Matt R. Mazloff, Charles E. Miller, David S. Schimel, Ariane Verdy, Daniel B. Whitt, Hong Zhang
Summary: The inventory and variability of oceanic dissolved inorganic carbon (DIC) are influenced by physical, chemical, and biological processes. Understanding the spatiotemporal variability of these processes is crucial for understanding the ocean carbon sink and its future trajectory.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Geosciences, Multidisciplinary
Ritabrata Thakur, Brian K. Arbic, Dimitris Menemenlis, Kayhan Momeni, Yulin Pan, W. R. Peltier, Joseph Skitka, Matthew H. Alford, Yuchen Ma
Summary: We propose improvements to the modeling of the vertical wavenumber spectrum of internal gravity waves in regional ocean simulations. Our study focuses on the sensitivity of the model to mixing parameters and compares the results to observations. The findings suggest that improving the mixing parameters can enhance the representation of internal wave dynamics.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Oceanography
Ou Wang, Tong Lee, Christopher G. Piecuch, Ichiro Fukumori, Ian Fenty, Thomas Frederikse, Dimitris Menemenlis, Rui M. Ponte, Hong Zhang
Summary: The relative contributions of local and remote wind stress and air-sea buoyancy forcing to sea-level variations along the East Coast of the United States are investigated. Wind stress explains a significant portion of the interannual sea-level variance, while both wind and buoyancy forcing together explain a larger portion. The study also disproves a previous hypothesis about the Labrador Sea wind stress being a driver of Nantucket sea-level variations. Remote buoyancy forcing is found to influence Nantucket sea level through slow advective processes.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Geosciences, Multidisciplinary
B. D. Dushaw, D. Menemenlis
Summary: An unconstrained global ocean simulation in 2020 confirms previous observations of diurnal internal tides by acoustic tomography in the Western North Atlantic. The simulation accurately reproduces the characteristics of K1 and O1 internal-tide standing waves, but shows deviations from observations in terms of barotropic and internal tides. The tomographic data provide a benchmark for improving the representation of tides, internal tides, and dissipation in models.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xiangyu Chen, Shiyong Teng, Jinming Li, Xuezhi Qiao, Weidong Zhao, Zhengjie Xue, Xudong Shi, Yuguang Wang, Wensheng Yang, Tie Wang
Summary: Magnetic resonance imaging (MRI) contrast agents, such as Magnevist (Gd-DTPA), have limited blood circulation time due to rapid clearance by the kidney, which hinders the improvement of contrast between tumors and normal tissue. To address this issue, a novel MRI contrast agent using deformable mesoporous organosilica nanoparticles (D-MON) incorporating Gd-DTPA is fabricated. In vivo distribution studies show that the D-MON-based contrast agent can prolong blood circulation time and achieve high-contrast imaging in tumor tissue, surpassing the performance of the clinical contrast agent Gd-DTPA.
ADVANCED MATERIALS
(2023)
Article
Geosciences, Multidisciplinary
C. Bertin, D. Carroll, D. Menemenlis, S. Dutkiewicz, H. Zhang, A. Matsuoka, S. Tank, M. Manizza, C. E. Miller, M. Babin, A. Mangin, V. Le Fouest
Summary: Arctic warming changes the fluxes of nutrients and organic matter from land to sea, affecting air-sea carbon exchange. Using a biogeochemical model, this study examines the role of Mackenzie River discharge in modulating air-sea CO2 fluxes in the southeastern Beaufort Sea from 2000 to 2019. The discharge of six chemical constituents leads to a net CO2 outgassing of 0.13 TgC yr(-1) and a decrease in the coastal carbon sink due to riverine dissolved organic and inorganic carbon. The results indicate that the Mackenzie River influences the capacity of the southeastern Beaufort Sea to act as a sink or source of atmospheric CO2. Accurate representation of land-to-sea biogeochemical coupling is crucial for understanding the Arctic coastal ocean response to the rapidly changing environment.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Civil
Hongkang Zhao, Yaping Dai, Jun Yang, Youzhen Fang, Chengjie Mi, Lingchen Yang, Guojian Li
Summary: In order to improve the seismic performance of precast reinforced concrete structures, a superimposed slab shear wall with innovative construction details was proposed. Five innovative superimposed slab shear walls and one cast-in-place concrete shear wall were designed and tested, considering the effect of axial compression. The results showed that the innovative superimposed slab shear walls had a higher strength capacity and lower lateral-resistant stiffness than the cast-in-place concrete shear wall. The peak strength capacity of the superimposed slab shear wall increased obviously with the enlargement in the axial compression ratio, but degraded rapidly after the peak load. This investigation provides valuable data for future structural seismic performance evaluations and applications of precast superimposed slab shear wall structures.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Orthopedics
Chuwei Tian, Huanyi Zhu, Liu Shi, Xiangxu Chen, Tian Xie, Yunfeng Rui
Summary: The aim of this study was to evaluate the effects of Friday admission on mortality and clinical outcomes in elderly patients with hip fractures. The study found that Friday admission had no effect on mortality and outcomes, but it may lead to delayed surgery.
ORTHOPAEDIC SURGERY
(2023)
Article
Oceanography
Manfredi Manizza, Dustin Carroll, Dimitris Menemenlis, Hong Zhang, Charles E. Miller
Summary: In recent decades, changes in sea-ice seasonality in the Arctic Ocean (AO) have had significant impacts on the phenology of phytoplankton blooms. Early sea-ice melt triggers earlier blooms, while delayed formation of sea ice leads to second fall blooms. These changes could have important consequences for Arctic marine ecosystems in a warmer and changing climate.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Environmental Sciences
Hector Torres, Alexander Wineteer, Patrice Klein, Tong Lee, Jinbo Wang, Ernesto Rodriguez, Dimitris Menemenlis, Hong Zhang
Summary: The kinetic energy transfer between the atmosphere and oceans, known as wind work, plays a significant role in ocean dynamics. Recent numerical estimates have shown a nearly fivefold increase in global wind work amplitude compared to those reported a decade ago due to the inclusion of a broader range of spatial and temporal scales. However, existing satellite observations do not fully capture this range. The ODYSEA satellite mission, which utilizes a wide-swath measurement approach, performs well in estimating wind work globally, except at latitudes north of 40 degrees N during summer.
Article
Environmental Sciences
Jinbo Wang, Hector Torres, Patrice Klein, Alexander Wineteer, Hong Zhang, Dimitris Menemenlis, Clement Ubelmann, Ernesto Rodriguez
Summary: Near Inertial Oscillations (NIOs) are ocean oscillations forced by intermittent winds, most active at mid-latitudes. This study assesses the potential of a new satellite mission concept, OSYSEA, to recover wind-forced NIOs from co-located winds and currents. Results show that NIOs can be accurately recovered using the ODYSEA spatial and temporal resolution.