Article
Oceanography
Chiranjivi Jayaram, Felix Jose
Summary: Coastal upwelling in the south eastern Arabian Sea during the summer monsoon season is assessed using wind stress and its curl. The study finds that wind stress curl plays a critical role in modulating upwelling along the coast, and the spatio-temporal variability of upwelling is dominated by wind stress curl.
CONTINENTAL SHELF RESEARCH
(2022)
Article
Oceanography
Lichuan Wu, Oyvind Breivik, Fangli Qiao
Summary: This study investigates the redistribution of global wind stress and turbulent kinetic energy flux by surface waves based on a 30-year wave hindcast. The role of waves in the windy oceans in middle and high latitudes is more significant. The findings suggest that including a wave model in coupled climate and Earth system models would improve predictability in weather forecasting and climate modeling.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Shan Liu, Juncheng Zuo, Yeqiang Shu, Qiyan Ji, Yunxia Cai, Jinglong Yao
Summary: Using satellite observations and reanalysis data, this study examines the long-term trend of coastal upwelling in the South China Sea (SCS) from 1982 to 2020. The findings show increasing upwelling intensity in three typical regions (eastern Guangdong, eastern Hainan, and eastern Vietnam) of the SCS. The study also investigates the causes of intensified upwelling through wind stress curl and wind stress analysis.
FRONTIERS IN MARINE SCIENCE
(2023)
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
Oceanography
Shuiqing Li
Summary: This study suggests that the conventional parametric description of z0 in relation to wind drag may not be accurate when swells dominate. A new parametric relationship is proposed based on observations, which better captures the relationship between z0 and wave age.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Article
Oceanography
Nyla T. Husain, Tetsu Hara, Peter P. Sullivan
Summary: Air-sea momentum and scalar fluxes are strongly influenced by the coupling dynamics between turbulent winds and waves. This study investigates the impacts of opposing wind on mean wind profile, drag coefficient, and wave growth/decay rates using large-eddy simulation. The findings show that waves opposing wind increase surface friction more drastically than waves following wind.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Oceanography
Nyla T. Husain, Tetsu Hara, Peter P. Sullivan
Summary: The coupled dynamics of turbulent airflow and waves traveling at oblique angles to the wind have significant impacts on wind speed, drag coefficient, and wave growth/decay rate. These findings have implications for parameterizing sea-state-dependent drag coefficient in forecast models.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Gonzalo S. Saldias, Wilber Hernandez, Carlos Lara, Richard Munoz, Cristian Rojas, Sebastian Vasquez, Ivan Perez-Santos, Luis Soto-Mardones
Summary: Surface oceanic fronts, particularly Sea Surface Temperature (SST) fronts, in the northern Patagonia region were analyzed for the period 2003-2019. The study found high probability of frontal occurrences off Chiloe Island, especially in summer and fall, with increased gradient magnitudes primarily in the spring and summer, suggesting the formation of coastal upwelling fronts. Additionally, the analysis revealed dominant variability modes in SST gradient magnitudes, with meridional coastal fronts dominating in summer and SST fronts inside the Inner Sea of Chiloe dominating in spring and early summer. Future research is recommended to focus on studying the vertical structure and variability of coastal fronts in the Inner Sea of Chiloe and its adjacent coastal ocean.
Article
Environmental Sciences
James Hlywiak, David S. Nolan
Summary: Proposals to cool sea surface temperatures using technology to weaken tropical cyclones have gained attention. Research suggests that artificially cooling the ocean can significantly weaken tropical cyclones, particularly in high sea surface temperature and deep ocean mixed layer environments. However, realistic simulations show that massive regions of artificially cooled ocean waters would be required to achieve a modest 15% weakening of a tropical cyclone two days before landfall, under ideal atmospheric and oceanic conditions.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Environmental Sciences
Yoshimi Kawai
Summary: The study analyzed 32 years of high-resolution atmospheric reanalysis data to determine the atmospheric responses to sea surface temperature (ST) fronts in the Bering Sea and Chukchi Sea. In the Chukchi Sea, the horizontal gradient and Laplacian of ST become noticeable in October and November, while an ST contrast develops in the winter in the Bering Sea. The study also demonstrated the pressure adjustment mechanism and confirmed the vertical mixing mechanism in both seas.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Meteorology & Atmospheric Sciences
Wei Xue, Xuguang Sun, Xiu-Qun Yang
Summary: The Western North Pacific plays a vital role in the development of ENSO and its impact on the East Asian summer monsoon. Unlike other tropical oceanic areas, the sea surface temperature and precipitation anomalies in the WNP are negatively correlated in boreal summer, indicating a primarily atmospheric-driven system. Two interannual variability modes, known as WNP-TCM and WNP-STCM, have been identified and their core regions align with key atmospheric features. These modes are influenced by local and remote forcing from SST anomalies and are controlled by ocean thermal processes.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Geosciences, Multidisciplinary
Yuntao Wang, Wentao Ma, Feng Zhou, Fei Chai
Summary: Sixteen years of satellite observations in the Arabian Sea reveal that frontal activities along the coast are largely influenced by monsoons, peaking in summer, especially near Somalia. The seasonal variability of chlorophyll near Somalia is found to be similar to that of wind and fronts, indicating a strong monsoonal impact on marine ecosystems.
JOURNAL OF MARINE SYSTEMS
(2021)
Article
Oceanography
Zeneida Wong, Gonzalo S. Saldias, John L. Largier, P. Ted Strub, Marcus Sobarzo
Summary: The study analyzed the upwelling shadow in the Gulf of Arauco using 15 years of satellite images and reanalysis product data, developing an Upwelling Shadow Index. Results showed that upwelling shadow events mostly lasted 1 day and were more frequent in spring/summer.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Changlong Liu, Xinyu Li, Jinbao Song, Zhongshui Zou, Jian Huang, Jun A. Zhang, Ganxin Jie, Jun Wang
Summary: The deviation of the mean wind profile from Monin-Obukhov similarity theory (MOST) within the wave boundary layer (WBL) is investigated in this study. The results show that the mean wind profile follows MOST under wind-sea conditions, but pronounced swell-related peaks appear under swell conditions.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Oceanography
Xu Chen, William Dewar, Eric Chassignet, Mark Bourassa, Steve Morey, Ganesh Gopalakrishnan
Summary: Accurate representation of air-sea interaction is crucial for numerical prediction of the ocean, weather, and climate. Studies suggest that sea surface temperature gradients and surface currents in the submesoscale regime have significant influence on air-sea fluxes of momentum, but the feedback between submesoscale processes and air-sea turbulent fluxes is not well understood.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Meteorology & Atmospheric Sciences
Xia Huang, Xuhua Cheng, Yiquan Qi
Article
Oceanography
Min Li, Robert S. Pickart, Michael A. Spall, Thomas J. Weingartner, Peigen Lin, G. W. K. Moore, Yiquan Qi
PROGRESS IN OCEANOGRAPHY
(2019)
Article
Environmental Sciences
Zifeng Hu, Yiquan Qi, Xianqiang He, Yu-Huai Wang, Dong-Ping Wang, Xuhua Cheng, Xiaohui Liu, Tao Wang
REMOTE SENSING OF ENVIRONMENT
(2019)
Article
Geosciences, Multidisciplinary
Yonggui Ma, Shuwen Zhang, Yiquan Qi, Zhiyou Jing
SCIENCE CHINA-EARTH SCIENCES
(2019)
Article
Oceanography
Xiaoqing Chu, Gengxin Chen, Yiquan Qi
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Oceanography
Tong Yan, Yiquan Qi, Zhiyou Jing, Shuqun Cai
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Marine & Freshwater Biology
Shihao Luo, Zhiyou Jing, Yiquan Qi
OCEAN SCIENCE JOURNAL
(2020)
Article
Oceanography
Tian Ma, Xuhua Cheng, Yiquan Qi, Jiajia Chen
ACTA OCEANOLOGICA SINICA
(2020)
Article
Geosciences, Multidisciplinary
Yuanyuan Gu, Xuhua Cheng, Yiquan Qi, Guifen Wang
JOURNAL OF MARINE SYSTEMS
(2020)
Article
Oceanography
Xiao Chen, Bo Qiu, Shuiming Chen, Yiquan Qi
Summary: Long-term tide gauge sea level data from 1969 to 2014 at two stations in Mindanao, Davao and Malakal, were analyzed to investigate the variability of the Mindanao Current (MC). The study found that the time scale of the MC transport change has lengthened over the past half-century, with shifts from biennial to interannual and eventually to decadal variability. These changes are primarily driven by alterations in the tropical Pacific surface wind system.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Environmental Sciences
Hao-Ran Zhang, Yuntao Wang, Peng Xiu, Yiquan Qi, Fei Chai
Summary: In the subarctic Pacific, the availability of bioavailable iron plays a dominant role in controlling the seasonal variability of diatom and small phytoplankton populations. Differences in bioavailable iron between the western and eastern subarctic Pacific lead to distinct seasonal patterns in phytoplankton growth, with the Fe limitation of diatom growth being stronger in the eastern region. Increasing atmospheric iron deposition had a stronger impact on phytoplankton primary production in the eastern subarctic Pacific, but macronutrient limitation also played a role.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Engineering, Ocean
Guosong Wang, Xidong Wang, Xinrong Wu, Kexiu Liu, Yiquan Qi, Chunjian Sun, Hongli Fu
Summary: In this paper, a novel hybrid and multivariate deep neural network, called HMnet3, is proposed for sea level anomaly (SLA) forecasting in the South China Sea. The network combines convolutional long short-term memory (ConvLSTM) and ensemble empirical mode decomposition (EEMD) based long short-term memory (LSTM) networks for spatiotemporal sequence forecasting and time series forecasting, respectively. During testing, HMnet3 outperforms state-of-the-art dynamic and statistical forecast models, especially in identifying small-scale eddies.
JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
(2022)
Article
Oceanography
Huan Mei, Yiquan Qi, Xuhua Cheng, Xiangbai Wu, Qiang Wang
Summary: The study investigates the impact of an island with variable meridional size on a hysteresis western boundary current (WBC) flowing across a gap influenced by a mesoscale eddy. The results suggest that the size of the island affects the WBC intrusion and the critical transition of the WBC regime. The sensitivity of the regime shift depends on the location and characteristics of the cyclonic and anticyclonic eddies.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Zhipeng Xu, Chengcheng Yang, Xiao Chen, Yiquan Qi
Summary: By using satellite altimeter observations and model simulations, this study investigates the seasonal variation of eddy kinetic energy (EKE) along the East Australian Current (EAC). Both data and model outputs show active intra-seasonal EKE along the EAC path, with a prominent seasonal cycle controlled by barotropic instability.
Article
Environmental Sciences
Shuai Zhang, Zhoufei Yu, Xun Gong, Yue Wang, Fengming Chang, Gerrit Lohmman, Yiquan Qi, Tiegang Li
Summary: Over the past 360,000 years, subsurface temperature and salinity in the Western Pacific Warm Pool were found to be linked to the shallow overturning circulation and varied on orbital timescales, acting similar to El Nino/Southern Oscillation processes.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)