Article
Meteorology & Atmospheric Sciences
Ze Meng, Lei Zhou, Raghu Murtugudde, Qingxuan Yang, Kandaga Pujiana, Jingyuan Xi
Summary: The study analyzed the dynamics of tropical oceanic intraseasonal variabilities associated with the Central Indian Ocean (CIO) mode, attributing intraseasonal sea surface temperature anomalies during the CIO mode mainly to zonal thermal advection and surface heat flux.
Article
Meteorology & Atmospheric Sciences
Yun Liang, Yan Du
Summary: This study identified a 50-80-day atmospheric intraseasonal oscillation (ISO) in the eastern tropical Indian Ocean, which peaks in boreal winter and is enhanced by ocean dynamic processes. The eastward propagation of the ISO is influenced by wind-driven equatorial dynamics, leading to SST warming and affecting local atmospheric conditions.
Article
Environmental Sciences
Jianhuang Qin, Lei Zhou, Ruiqiang Ding, Baosheng Li
Summary: Research shows that the Central Indian Ocean (CIO) mode index exhibits a high predictability limit during the Indian summer monsoon period, mainly due to the long predictability limits of intraseasonal sea surface temperature and zonal wind. This mode is expected to improve the prediction skills of the Indian summer monsoon.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Chemistry, Analytical
Sergey A. Piontkovski, Alexandr Melnik, Irina M. Serikova, Vladislav P. Evstigneev, Sergey Dobretsov
Summary: This study reveals the significant variation of bioluminescent potential in the upper mixed layer of the western Indian Ocean during the winter monsoon season. The maximal potential is associated with cyclonic eddy, and the fine-scale measurements show higher spatial heterogeneity. The trend of bioluminescent potential variance is similar to the zooplankton biomass.
Article
Oceanography
Motoki Nagura, Michael J. Mcphaden
Summary: The frequency spectra of meridional velocity measurements in the central equatorial Indian Ocean show two distinct peaks at quasi biweekly periods. The variability in these two frequency bands represents wind-driven mixed Rossby-gravity waves, with different spatial structures. The results are consistent with linear mixed Rossby-gravity wave theory and surface wind forcing is the primary driver of these waves.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Article
Meteorology & Atmospheric Sciences
Xia Zhao, Guang Yang, Dongliang Yuan, Yazhou Zhang
Summary: Previous studies have shown that the tropical Indian Ocean basin mode (IOB) plays a role in the phase transition of ENSO, but they did not differentiate between the two types of ENSO. This study finds that the boreal winter-spring IOB is more likely to induce the central-Pacific (CP) ENSO than the eastern-Pacific ENSO one year later. The study also highlights the need to improve simulation of the IOB's contribution to ENSO diversity in CMIP5 models.
Article
Geosciences, Multidisciplinary
Yazhou Zhang, Jianping Li, Yina Diao, Zhaolu Hou, Ting Liu
Summary: This study explores the link between the interannual variability of the Indian Ocean tripole and summertime cold extremes in Central Siberia. The positive phase of the Indian Ocean tripole leads to increased precipitation in southern tropical Asia, which in turn affects the temperature in Central Siberia by modulating the tropospheric air expansion/compression.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Guang Yang, Xia Zhao, Dongliang Yuan, Yazhou Zhang, Lin Liu, Shiqiu Peng
Summary: Previous studies have shown that the sea surface temperature anomalies (SSTA) in the tropical Atlantic or Indian Ocean during boreal winter-to-spring can lead to central-Pacific (CP) type El Nino-Southern Oscillation (ENSO) events in the following winter. This study uses observational data and CMIP5 model simulations to demonstrate the strong relationship between the winter-to-spring north tropical Atlantic (NTA) SSTA or Indian Ocean Basin (IOB) mode and CP ENSO events. The synergistic effect of IOB and NTA SSTA can lead to more severe CP ENSO events in the subsequent winter through adjustments in the Walker circulation.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Nining Sari Ningsih, Sholihati Lathifa Sakina, Raden Dwi Susanto, Farrah Hanifah
Summary: This study investigated the zonal current characteristics in the southeastern tropical Indian Ocean using simulation results, revealing distinctive features of currents in different regions. Current variations in the South Java Current region, the Indonesian Throughflow-South Equatorial Current region, and the transition zone were found to have different dominant timescales and influences from ENSO and the Indian Ocean Dipole.
Article
Meteorology & Atmospheric Sciences
Kuiping Li, Qin He, Yang Yang, Zhi Li, Weidong Yu
Summary: The diversity of quasi-biweekly mode in the Indian Ocean (IO) is limited. This study identifies two dominant summer modes, QBWM1 and QBWM2, with QBWM1 being IO basin-dependent and QBWM2 being closely associated with the northwestern Pacific. The maintenance mechanism of QBWM1 is understood through moisture dynamics, while QBWM2 is propagated through convectively coupled Rossby waves. Overall, the study provides important insights into the atmospheric circulation patterns in the IO and their impact on the South Asian monsoon.
JOURNAL OF CLIMATE
(2022)
Article
Environmental Sciences
Ze Meng, Lei Zhou, Jianhuang Qin, Baosheng Li
Summary: The study highlights the need for further understanding of the Indian summer monsoon, particularly the intraseasonal variabilities, and examines the remote forcing from the Southern Hemisphere on the monsoon system. It shows that the equatorial warm SST anomalies over the southeastern Indian Ocean can enhance surface latent heat flux and strengthen the northward-propagating monsoon intraseasonal oscillations, leading to increased rainfall events over the monsoon region. Improved SST simulations over SEIO in climate models can result in more realistic northward propagation and equatorial rainfall, while unsatisfactory simulations are attributed to deficient ocean-atmosphere interaction and weak variability of intraseasonal oceanic signals in the region.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Sihua Huang, Bin Wang, Zhiping Wen, Zesheng Chen
Summary: Previous studies have found a strong connection between the tropical easterly jet (TEJ) and Indian summer monsoon rainfall (ISMR), but this relationship breaks down from 1994 to 2003. This breakdown is attributed to increased rainfall variability over the tropical eastern Indian Ocean (TEIO).
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Jin Liu, Dongxiao Wang, Tingting Zu, Ke Huang, Oscar Y. W. Zhang
Summary: Based on 12 years of salinity data, significant positive salinity anomalies were found in the central tropical Indian Ocean. Ocean dynamic processes played a more important role than surface buoyancy fluxes in causing these anomalies. These high salinity anomalies reflect the response of the upper ocean to climate events and may impact regional air-sea interactions and large-scale processes.
Article
Geosciences, Multidisciplinary
Shuguang Wang, Adam H. Sobel
Summary: The authors propose a new approximation method to understand the moisture modes in idealized models of tropical intraseasonal oscillations. This method provides physical insights and filters out disturbances, enhancing the understanding of these oscillation patterns.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Baochao Liu, Qinglei Su, Huiwu Wang, Guang Yang, Yue Fang, Yongliang Duan, Yongcan Zu
Summary: An intrathermocline eddy (ITE) was observed over the southeastern tropical Indian Ocean, showing a typical lens-like structure and carrying a high salinity water mass that originated from the equatorial Indian Ocean. The formation of the ITE was closely related to local wind, and its hydrological characteristics differed from surface anticyclonic eddies in the area.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yaodong Xue, Yongfeng Cheng, Qing Li, Kai Wang, Wenlong Xu, Weisheng Du
Summary: The mechanical failure mechanism of rock masses containing internal joints under impact loading was studied using a combination of experimental and numerical methods. A dynamic failure mechanism model was proposed based on the research results, which is of great significance for understanding the failure process of rocks containing joints and for engineering applications.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Environmental Sciences
Jianhuang Qin, Lei Zhou, Baosheng Li, Ze Meng
Summary: This study examines the prediction skill of the Central Indian Ocean (CIO) mode in subseasonal-to-seasonal (S2S) air-sea coupled models. The ECMWF and UKMO models show significantly higher skills compared to other models. The decline in CIO mode prediction skill is attributed to the reduced signal of subseasonal zonal winds over the tropical central Indian Ocean.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Chaojie Wang, Wenling Li, Fangyuan Chen, Yaqian Cheng, Xin Huang, Bingxue Zou, Yunli Wang, Wenlong Xu, Shuping Qu
Summary: Ethylene biosynthesis and signal transduction are important in plant sex differentiation. This study identified and characterized 13 ACS genes in pumpkin, and found that 4 of them were expressed in both female and male flowers. Additionally, the expression levels of 2 ACS genes were upregulated after treatment, resulting in increased number of female flowers.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Meteorology & Atmospheric Sciences
Baosheng Li, Lei Zhou, Tao Lian, Ting Liu, Jianhuang Qin, Yan Du, Dake Chen
Summary: The role of the intraseasonal sea surface temperature (SST) gradient in the northward-propagating monsoon intraseasonal oscillation (MISO) is examined. It is found that the positive meridional SST gradient induces positive wind convergence and leads to convection. This study highlights the importance of the SST meridional gradient in the feedback to MISO.
JOURNAL OF CLIMATE
(2023)
Article
Materials Science, Ceramics
Wenzhi Sun, Liyan Fan, Xinxin Zhang, Denghu Wei, Mengmeng Jiao, Wenlong Xu, Hongwu Zhang
Summary: The properties of orange-emitting SLNMPO-0.5:Eu2+ and SLNMPO-1:Eu2+ phosphors with broad emission bands were investigated. It was found that they exhibited better photoluminescence properties and more red emissions compared to SMPO:Eu2+. These phosphors have the potential to be used in high-quality warm white light-emitting diode (WLED) devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Characterization & Testing
Yaodong Xue, Yongfeng Cheng, Qing Li, Weisheng Du, Wenlong Xu
Summary: This paper investigates the dynamic stress intensity factor (DSIF) at the crack tip of a PMMA beam with an internal offset crack under impact loading. The stress intensity factor and velocity of the mixed-mode crack tip under static and dynamic loading were derived using the transmission caustic method. Drop hammer loading tests were conducted on different specimens with biased cracks in the beam to obtain dynamic fracture mechanics parameters. The crack initiation angle and expansion path of impact-generated expansion cracks were analyzed based on theoretical analysis, and the differences between the fracture process and specimens containing internal symmetric cracks were discussed.
Article
Environmental Sciences
Hang Lv, Guifen Wang, Wenlong Xu, Yinxue Zhang, Long Jiang
Summary: Seasonal patterns of marine net primary production (NPP) in the South China Sea (SCS) were studied using monthly climatological NPP data from 2003 to 2020. The study revealed spatial differences in NPP seasonality and its departures from climatology in extreme El Nino-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) years. The differences in NPP seasonality were attributed to factors such as river discharge, summer upwelling, mixing, nutricline depth, and wind-driven mixing. The study also found that extreme climate events, such as ENSO and super IOD, influenced the NPP seasonal cycle in the SCS.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Jianhuang Qin, Heng Liu, Baosheng Li
Summary: In April 2022, a high surface air temperature record was reported over Northwestern India. This study investigates the contribution of interannual variability to Indian surface air temperature and possible reasons for the extreme temperatures in April 2022. The results show that the interannual variability of surface air temperature is captured by the first two leading modes using empirical orthogonal function analysis. Both modes exhibit the highest values over Northwestern India and are energetically active in 2022. The first mode is associated with the Indian Ocean Basin Mode and an anomalous anti-cyclone in the troposphere, while the second mode is influenced by the Rossby wave train from the North Atlantic to the north of India. The active Indian Ocean Basin Mode and strong Rossby wave source account for the extreme surface air temperature over northwestern India in April 2022. Additionally, the Indian regional mean temperature during April is well-represented by the indices of the Indian Ocean Basin Mode and tropospheric anomalous anti-cyclone, which can improve temperature predictions over India.
GEOSCIENCE LETTERS
(2023)
Article
Fisheries
Yang Du, Xiaoman Hu, Jifeng Chen, Wenlong Xu, Hao Li, Jiong Chen
Summary: This study investigated the effects of adding different concentrations of cup plant to the shrimp's feed on their growth performance, hepatopancreas and intestinal microstructure, gene expression, enzyme activity, as well as intestinal microorganisms and resistance to Vibrio parahaemolyticus E1 and White spot syndrome virus (WSSV) infection. The results showed that adding cup plant at different concentrations significantly improved the shrimp's growth rate, survival rate, and resistance to V. parahaemolyticus E1 and WSSV, with the best effect observed at 5% addition. The addition of cup plant also improved the shrimp's hepatopancreas and intestinal tissues, increased enzyme activity and immune-related gene expression, and regulated the composition of intestinal flora. In summary, cup plant can promote shrimp growth, enhance disease resistance, and serve as a potential environmentally-friendly alternative to antibiotics.
FISH & SHELLFISH IMMUNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Xuhua Cheng, Mingyu Zhao, Wei Duan, Long Jiang, Jiajia Chen, Chengcheng Yang, Yifei Zhou
Summary: During the altimeter era, there was significant decadal variability in the sea level of the South China Sea and western tropical Pacific. This variability was explained by the decadal variability of Walker Circulation associated with the Pacific Decadal Oscillation, as well as wind forced westward propagating Rossby waves. However, the interior wind forcing had minimal contribution to the decadal variability in the South China Sea, while remote forcing from the western tropical Pacific through oceanic bridge played a dominant role.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Wenlong Xu, Guifen Wang, Xuhua Cheng, Xiaogang Xing, Jianhuang Qin, Guidi Zhou, Long Jiang, Bingzhang Chen
Summary: In this study, the influence of mesoscale eddies on the subsurface chlorophyll maximum (SCM) layers in the South China Sea was examined using a coupled model. The results showed that eddies play a significant role in shaping the depth, thickness, and magnitude of SCM layers. The effects of eddies on SCM layers are most pronounced near the center of eddies and also influence the phytoplankton community structure.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Oceanography
Shufen Chen, Long Jiang, Xuhua Cheng, Guanghong Liao, Theo Gerkema
Summary: Estuarine-coastal systems, such as the Jiangsu coastal waters, are susceptible to pollution due to their low flushing efficiency. Understanding the vulnerability and flushing efficiency can provide valuable insights for environmental managers in estuarine-coastal systems with recurrent pollution.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Oceanography
Chengcheng Yang, Xuhua Cheng, Jin-Song von Storch, Jianhuang Qin, Bo Qiu
Summary: This study investigates the interannual variability of the Antarctic Circumpolar Current (ACC) in different basins and reveals significant differences in the Indian basin, the Pacific and Atlantic basins. The interannual variation in the Indian basin is correlated with the Southern Annular Mode (SAM), while in the Pacific and Atlantic basins it is modulated by the El Nino-Southern Oscillation (ENSO).
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Meteorology & Atmospheric Sciences
P. J. Vidya, Sourav Chatterjee, M. Ravichandran, S. Gautham, M. Nuncio, R. Murtugudde
Summary: This study examines the drivers behind the increasing trend in the Genesis Potential Index (GPI) of tropical cyclones in the Arabian Sea during the post-monsoon season. The study finds that increased atmospheric moisture loading, ocean heat content, and reduced vertical wind shear are the main factors contributing to the intensification of cyclone GPI. The study also identifies the influence of changes in the northern high-latitude climate on the cyclone genesis through the alteration of the subtropical jet and upper atmospheric circulation.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Chengcheng Yang, Xuhua Cheng, Jianhuang Qin
Summary: This study evaluates the performances of monthly OBP data from six GRACE products with two different solutions by comparing them with observed records at the Drake Passage. The results show that spherical harmonic products are better at capturing monthly OBP variability than mascon products at the Drake Passage. The skills of all GRACE products are higher in the south of the Polar Front and reach a minimum correlation with observations in the Local Dynamics Array (LDA) region, suggesting that spatial differences are mainly attributed to local mesoscale processes with high-frequency bottom eddy kinetic energy (EKE), making monthly OBP variations from GRACE products unreliable in eddy-rich regions.
GEOSCIENCE LETTERS
(2023)
