Article
Environmental Sciences
K. J. Albin, R. Jyothibabu, S. Santhi Krishnan, K. T. Alok, C. K. Sherin, G. V. M. Gupta
Summary: Phytoplankton size classes play a crucial role in marine ecosystems by organizing the food chain and trophic pathways. This study examines the changes in Phytoplankton size classes in the Northeastern Arabian Sea during different phases of the Northeast Monsoon. The results show that nanoplankton predominated in all three phases of the monsoon, followed by microplankton and picoplankton. The study also compared algorithm-based data to in-situ data and found that one algorithm provided more realistic results while the other showed a high degree of variation.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Review
Oceanography
Jan-Erik Tesdal, Hugh W. Ducklow, Joaquim I. Goes, Igor Yashayaev
Summary: The Labrador Sea is becoming more productive with more intense and widespread phytoplankton blooms. Nutrient concentrations in the upper Labrador Sea are positively correlated with chlorophyll-a concentrations and strongly correlated with winter convection depth.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Anil Kumar Vijayan, B. Bikram Reddy, V Sudheesh, Prachi Hemant Marathe, Vishnu N. Nampoothiri, N. Harikrishnachari, P. Kavya, G. V. M. Gupta, M. Ramanamurthy
Summary: The study investigates the community composition of phytoplankton in the eastern Arabian Sea during the winter monsoon, highlighting distinct spatial heterogeneity in phytoplankton distribution between coastal and offshore regions. The dominance of diatoms in coastal waters and the presence of mixotrophic ecosystem in offshore waters were observed. Nutrient dynamics and hydrodynamics play a key role in structuring the phytoplankton assemblage in different regions of the eastern Arabian Sea during the winter monsoon period.
JOURNAL OF MARINE SYSTEMS
(2021)
Article
Oceanography
Sravanthi Nukapothula, Ali P. Yunus, Chuqun Chen, Raju Attada, Allu Chinna Narayana
Summary: A major dust storm occurred in the northern Arabian Sea in January 2022, causing a significant decrease in visibility. Using MODIS and satellite reanalysis model data, our study examined the potential consequences and processes of this dust storm event, as well as its impact on sea surface temperature variability. We observed a substantial increase in dust mass concentrations (88%) during the event date compared to normal days, followed by an intense cooling (6.7 degrees C) in the region. Furthermore, there was an increase in latent heat flux concentrations (476 wm 2) and aerosol optical depth (1.4) over the northern Arabian Sea.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2023)
Article
Environmental Sciences
Shuangling Chen, Yu Meng
Summary: Accurate and robust measurements from ocean color satellites are crucial for studying changes in surface ocean properties. In this study, a locally-tuned chlorophyll algorithm was used to investigate the spatial expansion of phytoplankton blooms in the Ross Sea. The results showed that the blooms were larger than previously estimated and correlated with sea surface temperature, wind speed, and sea ice concentration.
Article
Environmental Sciences
Yehya Elsayed, Sofian Kanan, Ahmad Farhat
Summary: This study in the GCC region near two major airports reports seasonal variations in meteorological parameters, atmospheric dust, and dust-borne heavy metals concentrations. The concentrations of heavy metals, PM2.5, and PM10 fluctuated with meteorological conditions, with potential harm to human health. The chemical correlation between atmospheric dust and regional desert sand implies the localized origin of smaller dust particles.
ENVIRONMENTAL POLLUTION
(2021)
Article
Geosciences, Multidisciplinary
Wei Shi, Menghua Wang
Summary: This study investigates the dynamics of phytoplankton biomass in the Arabian Sea using chlorophyll-a as an indicator. It reveals that the summer and winter monsoons play different roles in driving phytoplankton blooms, with seasonal variability being more significant than interannual variability.
JOURNAL OF MARINE SYSTEMS
(2022)
Article
Environmental Sciences
Anran Liao, Dongmei Han, Xianfang Song, Shengtian Yang
Summary: This study revealed that the variations of harmful algal blooms in a reclaimed-water-source river depend on the river hydraulic conditions, indicating that upstream areas with river-like characteristics may support algae growth while downstream areas with lake-like characteristics may experience algae decline during storm events. Water temperature and flow velocity play key roles in influencing algal bloom dynamics in different parts of the river system.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Marine & Freshwater Biology
Allison R. Hrycik, Shannon McFarland, Ana Morales-Williams, Jason D. Stockwell
Summary: Springtime in temperate lakes is characterized by a phytoplankton bloom, followed by a grazing crustacean zooplankton bloom. The timing and species composition of these events may be influenced by antecedent conditions and climate change. Winter conditions have a strong impact on the succession and species composition of both phytoplankton and zooplankton.
Article
Geosciences, Multidisciplinary
Elizabeth J. Drenkard, Jasmin G. John, Charles A. Stock, Hyung-Gyu Lim, John P. Dunne, Paul Ginoux, Jessica Y. Luo
Summary: Deposition of mineral dust plays a crucial role in upper-ocean biogeochemical processes by delivering iron to iron-limited regions. This study examines the impact of dynamically changing iron deposition on tropical Pacific Ocean biogeochemistry using a fully coupled earth system model. The results show that increasing emissions and radiative forcing lead to enhanced dust and iron deposition, which align with soil moisture decreases and precipitation increases. The increased delivery of soluble iron reduces iron limitation in the equatorial Pacific and affects primary production and organic carbon flux. These findings highlight the importance of considering land-air-sea interactions when projecting ocean biogeochemical changes.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Green & Sustainable Science & Technology
Qi Liu, Yulu Tian, Yang Liu, Ming Yu, Zhaojiang Hou, Kejian He, Hui Xu, Baoshan Cui, Yuan Jiang
Summary: This study investigated phytoplankton communities at 110 sites in the Dongjiang River basin, China, and found that dissolved organic matter (DOM) is closely related to phytoplankton biomass and taxonomic composition, with different types of DOM having varying effects on phytoplankton community dynamics. The results suggest that DOM may serve as a potential warning of phytoplankton blooms.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Eko Siswanto, Yoshikazu Sasai, Kazuhiko Matsumoto, Makio C. Honda
Summary: By analyzing ocean color data, we found that the instability of the Kuroshio Extension affects the phenology of phytoplankton during winter-spring. Unstable Kuroshio Extension leads to higher chlorophyll-a (CHL) levels during winter and spring, due to increased nutrient and light availability. This finding suggests that the instability of the Kuroshio Extension may have implications for higher trophic level organisms in the ecosystem.
Article
Multidisciplinary Sciences
Brandon Kieft, Zhou Li, Samuel Bryson, Robert L. Hettich, Chongle Pan, Xavier Mayali, Ryan S. Mueller
Summary: This study found that different heterotrophic populations selectively assimilate exudates from common marine phytoplankton, with unique metabolic adaptations. The carbon assimilation rates calculated from SIP data provide a deeper mechanistic understanding of consumer succession and carbon use during marine bloom events.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Review
Oceanography
Jayashree Ghosh, Kunal Chakraborty, Trishneeta Bhattacharya, Vinu Valsala, Balaji Baduru
Summary: This study examines the impact of coastal upwelling dynamics on the spatio-temporal variability of pCO2 in the southeastern Arabian Sea (SEAS). It finds that the cold deeper water rising to the surface during upwelling decreases surface ocean pCO2, while carbon-rich upwelling waters increase pCO2. Temperature, dissolved inorganic carbon, and biological activities also affect pCO2 variability, but coastal upwelling dynamics dominate in controlling this variability.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Yi Xu, Ying Wu, Peng Xiu, Jianzhong Ge, Jing Zhang
Summary: The study evaluates the seasonal and interannual variability of phytoplankton in the East China Sea (ECS) and identifies the environmental determinants that drive these variations. The findings highlight the importance of the triangular area in the ECS in understanding phytoplankton dynamics, with climate-sensitive environmental drivers playing a key role in the region.
FRONTIERS IN MARINE SCIENCE
(2022)