scholarly journals INFLUENCIA DEL RÍO SINÚ Y EL MAR CARIBE EN EL SISTEMA LAGUNAR DE CISPATÁ

2016 ◽  
Vol 37 (1) ◽  
Author(s):  
Mauricio Ruiz Ochoa ◽  
Gladys Bernal ◽  
Jaime Polanía
Keyword(s):  
Time Series ◽  
Sea Level ◽  
Caribbean Sea ◽  
Data Logging ◽  
Lagoon System ◽  
Regulation Effect ◽  
El Sistema ◽  
The Caribbean ◽  
The One ◽  
Del Rio

The influence of the Sinú River and the Caribbean Sea over the Cispatá lagoon system was studied through annual and interannual analysis, as well as the tendency of hydrological (precipitation, discharge), and marine (SST, level) time series. The hydrological series were correlated with ONI, NAO and PDO macroclimatic indices, and, from data logging of flow stations down of Urrá I dam, their effects over the lagoon system were studied. No significant correlation between the precipitation and ENSO was found. The flow of the river basin highlands contribute with 50% of the one released. The flow coming into the lagoon system displayed a monomodal cycle. Positive flow anomalies were associated with La Niña, negative ones with El Niño. We found that the regulation effect on the flow by Urrá I is noticeable in the Angostura de Urrá, Pasacaballo, and Caño Grande stations, whereas in the Cotoca Abajo station it is not substantial. The sea level and the SST registered a 25 cm rise in 44 years, and one of 0.6 °C in 20 years, respectively. Four prospective scenarios on the river – sea influence over the lagoon system were presented, considering the sea level rise. The first two scenarios suppose that the communications between the Sinú River and the lagoon system will last; and the following two that one of the two arms of the river that feed the system will clog.

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.

scholarly journals Sea level extremes in the Caribbean Sea

2014 ◽  
Vol 119 (8) ◽  
pp. 4714-4731 ◽  
Author(s):  
R. Ricardo Torres ◽  
Michael N. Tsimplis
Keyword(s):  
Sea Level ◽  
Caribbean Sea ◽  
The Caribbean

Sea-level trends and interannual variability in the Caribbean Sea

2013 ◽  
Vol 118 (6) ◽  
pp. 2934-2947 ◽  
Author(s):  
R. Ricardo Torres ◽  
Michael N. Tsimplis
Keyword(s):  
Interannual Variability ◽  
Sea Level ◽  
Caribbean Sea ◽  
The Caribbean

scholarly journals CARACTERIZACION GEOMORFOLOGICA DE LA LLANURA DELTAICA DEL RIO MAGDALENA CON ENFASIS EN EL SISTEMA LAGUNAR DE LA CIENAGA GRANDE DE SANTA MARTA, COLOMBIA

2016 ◽  
Vol 25 ◽  
Author(s):  
Gladys Bernal
Keyword(s):  
Sierra Nevada ◽  
Cross Section ◽  
Barrier Island ◽  
Lagoon System ◽  
El Sistema ◽  
Salt Pan ◽  
Dominant Process ◽  
Magdalena River ◽  
Del Rio ◽  
Geomorphic Units

The plain located between Magdalena river and Sierra Nevada de Santa Marta has been divided into five geomorphic units: Magdalena floodplain; present delta lagoon system; marginal lagoon system; beach and barrier island and alluvial foothill plain. The features of each one are product of specific events in time. The marginal lagoon system and its barrier island conform a scheme of lagoon - barrier - sea. Salamanca shore is dominated by waves and is subjected to recession. A general cross section of the island includes seabeach- dunes-plain with vegetation-salt pan-plain with vegetation-mangrove-lagoon. The marginal lagoon system (which includes Ciénaga Grande) is strongly dependent of vegetation. Toward northwest desertification is the dominant process and toward northeast (alluvial foothill plain) it,s

scholarly journals Regional sea level change and variability in the Caribbean sea since 1950

2012 ◽  
Vol 2 (2) ◽  
pp. 125-133 ◽  
Author(s):  
H. Palanisamy ◽  
M. Becker ◽  
B. Meyssignac ◽  
O. Henry ◽  
A. Cazenave
Keyword(s):  
Sea Level ◽  
Tide Gauge ◽  
Caribbean Sea ◽  
Tide Gauge Records ◽  
Level Change ◽  
The Past ◽  
Regional Sea Level ◽  
The Mean ◽  
The Caribbean ◽  
Regional Sea Level Change

Regional sea level change and variability in the Caribbean sea since 1950We investigate the regional variability in sea level in the Caribbean Sea region over the past 60 years (1950-2009) using an Empirical Orthogonal Function (EOF)-based 2-dimensional past sea level reconstruction (a mean of 3 reconstructions based on few long tide gauge records and different sea level grids from satellite altimetry and ocean circulation models) and satellite altimetry data for the last two decades. We find that over the past 60 years, the mean rate of sea level rise in the region was similar to the global mean rise (~1.8 mm/yr). The interannual mean sea level of the placeCaribbean region appears highly correlated with El Nino-Southern Oscillation (ENSO) indices. Interpolation of the sea level reconstruction grid at different sites, in particular at the Caribbean Islands where tide gauge records are either very short or inexistent, shows that locally, the sea level trend is on the order of 2 mm/yr, i.e. only slightly larger than the mean trend over the region. Besides, correlation with ENSO is in general good, especially since the mid-1980s. We also find a significant correlation between the interannual variability in sea level and hurricane activity, especially over the past decade during which hurricane intensity and sea level interannual variability have both increased.

scholarly journals CARACTERÍSTICAS HIDROGRÁFICAS DEL SISTEMA LAGUNAR LOS MICOS-QUEMADA EN EL CARIBE HONDUREÑO

2009 ◽  
Vol 1 ◽  
pp. 215
Author(s):  
Carlos L. Brenes ◽  
Rosario Benavides Morera ◽  
Daniel Ballestero
Keyword(s):  
Dissolved Oxygen ◽  
Central Area ◽  
Sampling Period ◽  
Temporal Variations ◽  
Entire Body ◽  
Surface Salinity ◽  
Lagoon System ◽  
El Sistema ◽  
The Caribbean ◽  
Maximum Turbidity

Auspiciado por el Proyecto PREPAC (Plan Regional de Pesca y Acuicultura Continental) se realizó un levantamiento hidrográfico en 27 estaciones en el sistema lagunar Micos-Quemada en el litoral Caribe de Honduras. Los muestreos mensuales se extendieron de octubre del 2005 a mayo del 2006 y se determinaron la temperatura, el pH, el oxígeno disuelto, la salinidad y la turbidez. La temperatura superficial osciló entre los 24.2 y 31.8°C, con variaciones temporales extremas del orden de los 7°C. Lo valores más bajos se ubican al final y principio de año (octubre-febrero). La salinidad superficial presenta un marcado ciclo estacional, con valores superiores a 12 durante los meses secos en prácticamente todo el cuerpo de agua, mientras que en la época lluviosa (octubre a febrero) están alrededor de 6. Los valores de pH encontrados para el período de estudio se ubicaron entre los 7.8 y 8.7. Los valores más altos se localizan en la zona central del sistema lagunar y los más bajos en las zonas cercanas a las orillas. Los máximos valores de turbidez se observan en febrero y diciembre. La zona con aguas más claras se localiza en la región cercana a la Barra de Miami en el lado noroeste de la laguna. El oxígeno superficial varió entre 5.0 mg/L y 7.6 mg/L durante los meses de octubre a febrero. La variación temporal del oxígeno disuelto muestra que los máximos y mínimos para todo el período de estudio se localizaron en octubre y mayo respectivamente. A hydrographic survey funded by PREPAC (Plan Regional de Pesca y Acuicultura Continental) was carried out in the Micos-Quemada lagoon system in the Caribbean coast of Honduras. From October 2005 to May 2006 27 sampling stations were occupied to measure pH, dissolved oxygen, salinity, and turbidity. Surface temperatures were between 24.2 and 31.8°C during the sampling period, with extreme temporal variations close to 7°C. Minimum temperatures were observed between October and February. Surface salinity showed a clear seasonal cycle, with values greater than 12 during the dry months virtually over the entire body of water, while during the rainy season (October to February) salinity values were around 6. Values for pH were between 7.8 and 8.7 during the study. The highest pH values were found in the central area of the lagoon system and the lowest in the areas close to the banks, likely due to the degradation of organic matter and to the contribution from the tributary. Maximum turbidity was observed in February and December, while the area with clearest water was located near the bar. Surface oxygen concentration varied between 5.0 and 7.6 mg/L from October to February. Maximum and minimum values of dissolved oxygen were observed in October and May, respectively.

scholarly journals Inventory of ascidians (Tunicata, Ascidiacea) from the National Park La Restinga, Isla Margarita, Venezuela

2010 ◽  
Vol 10 (1) ◽  
pp. 209-218 ◽  
Author(s):  
Rosana Moreira Rocha ◽  
Edlin Guerra-Castro ◽  
Carlos Lira ◽  
Sheila Marquez Pauls ◽  
Ivan Hernández ◽  
...  
Keyword(s):  
Introduced Species ◽  
National Park ◽  
Caribbean Sea ◽  
Colonial Species ◽  
Management Procedures ◽  
The Caribbean ◽  
Ecteinascidia Turbinata ◽  
Del Rio

Although ascidians form a conspicuous part of sessile assemblages in the Caribbean, no specialized inventories have been developed in Venezuela, except for a list of 15 species reported from Margarita Island (1984). Here we present the results of a taxonomic workshop held in the Universidad de Oriente, Boca del Rio, Margarita Island during April 20-25 of 2009, sponsored by the NaGISA-Caribbean Sea program. La Restinga National park was surveyed and we found 29 species belonging to 19 genera and 10 families. The most abundant colonial species were Clavelina oblonga, Aplidium accarense, Polyclinum constellatum, Distaplia bermudensis, Symplegma rubra, S. brakenhielmi, Botrylloides nigrum and Ecteinascidia turbinata. Among the solitary ascidians Phallusia nigra, Ascidia curvata, Microcosmus exasperatus, Styela canopus, Styela sp.1 and Styela sp. 2 were the most abundant. The ascidian diversity in this lagoon is one of the highest for similar habitats in the Caribbean and seven species are new registers for Venezuela (Ascidia curvata, Ecteinascidia styeloides, Aplidium accarense, Distaplia stylifera, Trididemnum orbiculatum, Symplegma rubra, and S. brakenhielmi). One point of concern for the conservation of la Restinga National Park is the presence of possible introduced species, and some management procedures are suggested.

Relative sea level highstands of the Yucatán Peninsula, Mexico, constrained by speleothem growth periods

2020 ◽  
Author(s):  
Simon Dominik Steidle ◽  
Sophie Warken ◽  
Norbert Frank ◽  
Julius Förstel ◽  
Nils Schorndorf ◽  
...  
Keyword(s):  
Sea Level ◽  
Trace Element Analysis ◽  
Caribbean Sea ◽  
First Record ◽  
Peak Height ◽  
Planetary Science ◽  
Scale Growth ◽  
Relative Sea Level ◽  
Element Analysis ◽  
The Caribbean

<p>The loading of the North American continent with ice sheets causes a geomorphologic response. As a result of this process, a NW-SE gradient of relative sea level developed in the Caribbean during periods of glaciation. In order to distinguish geomorphologic and eustatic contributions it is important to resolve timing and amplitude of relative sea level at different positions in the Caribbean.</p><p>The cave systems around Tulum, Quintana Roo, Mexico are presently submerged and well-connected to the nearby Atlantic with a low hydraulic head gradient. Speleothems must have formed during periods of lower sea level, thus providing constraints on the maximum elevation of relative sea level for given periods of time. Conversely, periods of growth cessation could have been caused by sea level rise thus indicating minimum relative sea level during highstands.</p><p>Here, we present <sup>230</sup>Th/U dated submerged speleothems that grew during MIS5a-d as well as MIS1/2, MIS6 and MIS11/12.</p><p>Growth of a single stalagmite (QUE01) at -10.8±0.1m (relative to today's sea level) was interrupted twice. Petrographical studies and trace element analysis indicate that submergence caused millennial-scale growth stops in QUE01 during MIS5. The proposed highstands are between 109.4±0.3ka and 105.0±0.3ka as well as between 104.5±0.4ka and 96.9±0.4ka.</p><p>While a previous study [1] constrains the amplitude to <9.9m, this study further improves the timing. This is the first record in this area that yields bracketing ages for those highstands from a speleothem that is very close to the peak height. In order to reconstruct a Caribbean sea level gradient, the combined Yucatán record acts as a counterpiece to a similar study from the northern end of the Caribbean sea level gradient which reports highstands at that time with a higher relative sea level [4].</p><p>Speleothem growth during MIS1/2 (19-8ka) relates to conflicting local sea level markers [2,3] and contains century-scale growth stops. Samples dating back to MIS6 and MIS11/12 highlight the potential for sea level reconstruction in this area before MIS5.</p><p>[1] Moseley et al. (2013) <em>Journal of Quaternary Science</em> <strong>28</strong> 293-300<br>[2] Moseley et al. (2015) <em>The Holocene</em> <strong>25</strong> 1511-1521<br>[3] Hering et al. (2018) <em>Journal of Quaternary Science</em> <strong>33</strong> 444-454<br>[4] Wainer et al. (2017) <em>Earth and Planetary Science Letters</em> <strong>457</strong> 325-334</p>

scholarly journals Predictability of non-phase-locked baroclinic tides in the Caribbean Sea

Ocean Science ◽  
2019 ◽  
Vol 15 (5) ◽  
pp. 1287-1305
Author(s):  
Edward D. Zaron
Keyword(s):  
Sea Level ◽  
Forecast Error ◽  
Caribbean Sea ◽  
Forecast Model ◽  
Sea Surface ◽  
Spatial And Temporal Variability ◽  
Tide Gauges ◽  
Sea Level Anomalies ◽  
The Caribbean ◽  
The Difference

Abstract. The predictability of the sea surface height expression of baroclinic tides is examined with 96 h forecasts produced by the AMSEAS operational forecast model during 2013–2014. The phase-locked tide, both barotropic and baroclinic, is identified by harmonic analysis of the 2-year record and found to agree well with observations from tide gauges and satellite altimetry within the Caribbean Sea. The non-phase-locked baroclinic tide, which is created by time-variable mesoscale stratification and currents, may be identified from residual sea level anomalies (SLAs) near the tidal frequencies. The predictability of the non-phase-locked tide is assessed by measuring the difference between a forecast – centered at T+36, T+60, or T+84 h – and the model's later verifying analysis for the same time. Within the Caribbean Sea, where a baroclinic tidal sea level range of ±5 cm is typical, the forecast error for the non-phase-locked tidal SLA is correlated with the forecast error for the subtidal (mesoscale) SLA. Root mean square values of the former range from 0.5 to 2 cm, while the latter ranges from 1 to 6 cm, for a typical 84 h forecast. The spatial and temporal variability of the forecast error is related to the dynamical origins of the non-phase-locked tide and is briefly surveyed within the model.

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