scholarly journals Carbonate ion concentration in glacial-age deep waters of the Caribbean Sea

2002 ◽  
Vol 3 (3) ◽  
pp. 1-14 ◽  
Author(s):  
Wallace S. Broecker ◽  
Elizabeth Clark
Keyword(s):  
Caribbean Sea ◽  
Ion Concentration ◽  
Carbonate Ion ◽  
Deep Waters ◽  
The Caribbean

scholarly journals Ba, B, and U element partitioning in magnesian calcite skeletons of Octocorallia corals

2015 ◽  
Vol 12 (1) ◽  
pp. 413-444 ◽  
Author(s):  
T. Yoshimura ◽  
A. Suzuki ◽  
N. Iwasaki
Keyword(s):  
Carbon Sources ◽  
Deep Ocean ◽  
Ion Concentration ◽  
Dissolved Carbon ◽  
Oxygen And Carbon Isotope ◽  
Carbonate Ion ◽  
Deep Waters ◽  
Element Partitioning ◽  
Physicochemical Factors ◽  
Positive Correlations

Abstract. Barium, boron and uranium element partitioning and oxygen and carbon isotope fractionation of high-Mg calcite skeletons of Octocorallia corals were investigated. The dissolved Ba concentration in seawater and the coral Ba/Ca ratio showed a clear positive correlation. The empirically derived barium partition coefficient is comparable to previous data for not only calcitic corals but also intermediate- to deep-water-dwelling scleractinian corals whose skeletons are composed of aragonite. Octocorallia corals are geologically important producers of biominerals, and they provide long-term records (up to hundreds of years) of environmental conditions in the deep ocean. Our data suggest that Ba/Ca ratios in Octocorallia corals may be a useful proxy for nutrients in intermediate and deep waters. The Ba/Ca ratio, a possible proxy for pH or carbonate ion concentration in seawater, showed the largest correlation with δ13C among the examined parameters. This result implies that the pH of the extracytoplasmic calcifying fluid (ECF) simultaneously influences δ18O, δ13C, and Ba/Ca by influencing the relative contributions of dissolved carbon sources in the ECF. Positive correlations of Ba/Ca with δ18 and δ13C suggest that δ18 and δ13C are enriched in light isotopes when conditions are less alkaline, suggesting a potential role of biological alkalinity pumping becomes more favorable with decreasing calcifying fluid pH. Substantial inter- and intra-specimen variations in Ba/Ca suggest that physicochemical factors do not exert a dominant systematic control on U incorporation.

scholarly journals First register of the Tantulocarida order Boxshall and Lincoln, 1983 (Crustacea) in deep waters of the Colombian Caribbean

2021 ◽  
Vol 50 (1) ◽  
pp. 171-178
Author(s):  
Juan Cortés ◽  
Néstor Hernando ◽  
Maryela Bolaño
Keyword(s):  
Caribbean Sea ◽  
Optical Microscope ◽  
Hydrocarbon Exploration ◽  
Morphometric Characters ◽  
Deep Waters ◽  
The Caribbean ◽  
Exploration Area ◽  
Host Parasite ◽  
First Time ◽  
Made In

The presence of parasitic crustaceans of the order Tantulocarida in the Caribbean Sea is reported for the first time. The organisms were found parasitizing a Cumacea of the genus Eudorellla and two Tanaidaceans of the genus Tanaella, between 2,420 and 2,786 m deep. The organisms came from the benthic community samplings made in Ocean Caribbean ecoregion (COC), in a hydrocarbon exploration area. The organisms were analyzed in the laboratory with an optical microscope and stereoscope; photographs were taken, and diagrams were made to describe the main morphological and morphometric characters. Four tantulocaridans were found, of which one was male and the other sexual females. Due to host-parasite specificity and the lack of reports in the Caribbean Sea, it is highly likely that these collected species are new to science.

scholarly journals Diel foraging behavior of gravid leatherback sea turtles in deep waters of the Caribbean Sea

2010 ◽  
Vol 213 (23) ◽  
pp. 3961-3971 ◽  
Author(s):  
J. Casey ◽  
J. Garner ◽  
S. Garner ◽  
A. S. Williard
Keyword(s):  
Foraging Behavior ◽  
Sea Turtles ◽  
Caribbean Sea ◽  
Deep Waters ◽  
The Caribbean ◽  
Leatherback Sea Turtles

scholarly journals A mechanism for freshening the Caribbean Sea in pre‐Ice Age time

2014 ◽  
Vol 29 (6) ◽  
pp. 508-517 ◽  
Author(s):  
Alberto M. Mestas‐Nuñez ◽  
Peter Molnar
Keyword(s):  
Caribbean Sea ◽  
Ice Age ◽  
The Caribbean

scholarly journals Implications of GNSS-Inferred Tropopause Altitude Associated with Terrestrial Gamma-Ray Flashes

2021 ◽  
Vol 13 (10) ◽  
pp. 1939
Author(s):  
Tao Xian ◽  
Gaopeng Lu ◽  
Hongbo Zhang ◽  
Yongping Wang ◽  
Shaolin Xiong ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Thermal Structure ◽  
Deep Convection ◽  
Caribbean Sea ◽  
Negative Bias ◽  
Upper Troposphere ◽  
Cold Anomaly ◽  
The Caribbean ◽  
Geographic Distributions

The thermal structure of the environmental atmosphere associated with Terrestrial Gamma-ray Flashes (TGFs) is investigated with the combined observations from several detectors (FERMI, RHESSI, and Insight-HXMT) and GNSS-RO (SAC-C, COSMIC, GRACE, TerraSAR-X, and MetOp-A). The geographic distributions of TGF-related tropopause altitude and climatology are similar. The regional TGF-related tropopause altitude in Africa and the Caribbean Sea is 0.1–0.4 km lower than the climatology, whereas that in Asia is 0.1–0.2 km higher. Most of the TGF-related tropopause altitudes are slightly higher than the climatology, while some of them have a slightly negative bias. The subtropical TGF-producing thunderstorms are warmer in the troposphere and have a colder and higher tropopause over land than the ocean. There is no significant land–ocean difference in the thermal structure for the tropical TGF-producing thunderstorms. The TGF-producing thunderstorms have a cold anomaly in the middle and upper troposphere and have stronger anomalies than the deep convection found in previous studies.

Axinyssa ambrosia and Axinyssa yumae (Porifera, Halichondrida): two valid sponge species from the Caribbean Sea

Zootaxa ◽  
2013 ◽  
Vol 3682 (3) ◽  
pp. 495 ◽  
Author(s):  
SVEN ZEA ◽  
DIEGO VALDERRAMA ◽  
ANA MARÍA MARTÍNEZ
Keyword(s):  
Caribbean Sea ◽  
Sponge Species ◽  
The Caribbean

scholarly journals Nonlinear analysis of the occurrence of hurricanes in the Gulf of Mexico and the Caribbean Sea

2018 ◽  
Vol 25 (2) ◽  
pp. 291-300 ◽  
Author(s):  
Berenice Rojo-Garibaldi ◽  
David Alberto Salas-de-León ◽  
María Adela Monreal-Gómez ◽  
Norma Leticia Sánchez-Santillán ◽  
David Salas-Monreal
Keyword(s):  
Time Series ◽  
Gulf Of Mexico ◽  
Nonlinear Analysis ◽  
Chaotic Behavior ◽  
Caribbean Sea ◽  
Historical Record ◽  
Nonlinear Analyses ◽  
The North ◽  
The Caribbean ◽  
The Individual

Abstract. Hurricanes are complex systems that carry large amounts of energy. Their impact often produces natural disasters involving the loss of human lives and materials, such as infrastructure, valued at billions of US dollars. However, not everything about hurricanes is negative, as hurricanes are the main source of rainwater for the regions where they develop. This study shows a nonlinear analysis of the time series of the occurrence of hurricanes in the Gulf of Mexico and the Caribbean Sea obtained from 1749 to 2012. The construction of the hurricane time series was carried out based on the hurricane database of the North Atlantic basin hurricane database (HURDAT) and the published historical information. The hurricane time series provides a unique historical record on information about ocean–atmosphere interactions. The Lyapunov exponent indicated that the system presented chaotic dynamics, and the spectral analysis and nonlinear analyses of the time series of the hurricanes showed chaotic edge behavior. One possible explanation for this chaotic edge is the individual chaotic behavior of hurricanes, either by category or individually regardless of their category and their behavior on a regular basis.

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