301 research outputs found
Climate change impacts to the Arctic Ocean revealed from high resolution GEOTRACES Po-210-Pb-210-Ra-226 disequilibria studies
No full textAuthor Posting. © American Geophysical Union, 2022. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 127(5), (2022):
e2021JC018359, https://doi.org/10.1029/2021JC018359.Climate change is transforming the Arctic Ocean in unprecedented ways which can be most directly observed in the systematic decline in seasonal ice coverage. From the collection and analysis of particulate and dissolved activities of 210Po and 210Pb from four deepwater superstations, as a part of the US Arctic GEOTRACES cruise during 2015, and in conjunction with previously published data, the temporal and spatial variations in their activities, inventories and residence times are evaluated. The results show that the partitioning of particulate and dissolved phases has changed significantly in the 8 years between 2007 and 2015, while the total 210Po and 210Pb activities have remained relatively unchanged. Observed total 210Po/210Pb activity ratio was less than unity in all deepwater stations, implying disequilibria in the entire water column. From the distribution of total 210Po and 210Pb in the upper 500 m of all major Arctic Basins, the derived scavenging efficiencies decrease as per the following sequence: Makarov Basin > Gakkel Bridge > Canada Basin Nansen Basin ∼ Amundsen Basin > Alpha Ridge, which is the reverse order of the calculated residence times of 210PoT. The scavenging intensities differ between the fully ice-covered, partially ice-covered, and no ice-covered stations, as observed from the differences in the average activities of 210Po and 210Pb. The average settling velocity of particulate matter based on the 210Pb activity is similar to the published values based on 230Th, indicating removal mechanism(s) of Th and Pb is (are) similar.This work was supported by National Science Foundation grants (NSF-PLR-1434578, MB; and NSF-OPP-1435376 KM). Mark Baskaran (PI) and Kanchan Maiti were independently funded by NSF.2022-10-0
Report of Sampling and Analytical Activities: Groundwater from the Vicinity of the Industrial Excess Landfill, Uniontown, Ohio
No full textGroundwater samples were collected in two sampling trips, on July 15, 2005 and October 20, 2005. All samples were collected personally by the investigators (Michael E. Ketterer and Mark M. Baskaran), working in the capacity of paid environmental consultants on behalf of the Concerned Citizens of lake Township (CCLT). Water samples were obtained from existing domestic/residential wells, irrigation wells, and one pre-established monitoring well, all of which were located on private property accessed with explicit permission given to CCLT. Samples from irrigation and monitoring wells (DK, GZ, NB, and MW-25s) were collected using a submersible 12V battery powered pump, equipped with fluorinated ethylene- propylene tubing.
This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works.
If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/cclt/1001/thumbnail.jp
Environmental and Climate Proxies Embedded in Coral Skeletons
No full textScleractinian (hard layered) corals live for several centuries or longer in the tropical surface waters that comprise about half of the total surface area of the world’s oceans. Coral reefs in the tropical surface waters are the largest biologically produced natural features over the Earth’s surface. About 20% of modern carbonate accumulation takes place in coral reefs. The relatively thick annual growth bands of coral skeleton (usually around 10 mm a year) have provided a wealth of information on the climate and environmental changes that occurred in the past. These environmental archives are becoming essential to forecast the future climate and environmental changes in their local habitats in the tropical regions including the Indo-Pacific Warm Pool region that plays a significant role in the world ocean and atmospheric circulation, hence in the entire globe. Deep-sea scleractinian corals often living more than a millennium have been found in most oceans, and these slow-growing corals (a few micron meters a year) have also been found to faithfully record climate and environmental changes that occurred in the ocean. This chapter introduces the status of the scientific investigation on a coral skeleton climate and environmental proxies to the audience who are interested in coral reef with respect to climate and environmental change. It will briefly cover the biomineralization process, methods of sampling coral cores and subsequent cleaning for further chemical analysis, skeleton age determinations, and the utilities of selected chemical elements and selected isotope proxies (Li, B, C, N, O, F, Na, Ca, V, Cr, Mn, Fe, Ni, Cu, Zn, Y, Mo, Cd, I, Ba, REEs, Nd, Pb, U, Pu). This chapter is largely dealt with surface-dwelling tropical corals, but it also includes some proxy studies on deep corals.1 Introduction and Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
R. John Morrison, Jing Zhang, Gi Hoon Hong, and Thamasak Yeemin
2 Anthropogenic Environmental Impacts on Coral Reefs in the Western and
South-Western Pacific Ocean . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
R. John Morrison and W. G. L. Aalbersberg
3 Advances in Coral Biology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Thamasak Yeemin, Vo Si Tuan, and Suharsono
4 Reef Ecology in the Western Pacific for Adaptation to Global Change . . . . . . . 55
Makamas Sutthacheep, Thamasak Yeemin, and Porfirio M. Aliño
5 Biogeochemical Dynamics of Coral Reef Systems . . . . . . . . . . . . . . . . . . . . . . . 99
Jing Zhang, Yi Xu, Hui Huang, Xiu Bao Li, Wei Zheng, and Dao Ru Wang
6 Environmental and Climate Proxies Embedded in Coral Skeletons . . . . . . . . . 135
Gi Hoon Hong, Suk Hyun Kim, and Mark Baskaran
7 Synthesis and Future Perspectives on the Coral Reefs in the Western Pacific
Region . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Jing Zhang, Gi Hoon Hong, R. John Morrison, and Thamasak Yeemin
Postscript . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Delivery of Bioactive Molecule, b-Carotene - A Pro-Vitamin-A Carotenoid From Natural Source Using Microencapsulation Technique for its better Efficacy
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Microencapsulation of Lutein and its Bioavailability for Macular Pigment Deficiency Disorder
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Influence of Vegetable Oils Rich in Specific Fatty Acids on Bioavailability of Β-Carotene from Leafy Greens In Vitro
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Protein and Polysaccharide Based Nanoencapsules Loaded with Β-Carotene for Modulating Bioavailability and Antioxidant Property
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Formulation of Edible Coating for Tomato using Aloe vera with functional ingredients
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Biochemical Changes during Ripening in Wood Apple Fruits with reference to Pectic Polysaccharides
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Biochemical and Microbiological quality attributes of Cauliflower (Brassica oleraceae cv botrytis) during Storage
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
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