A5001738517- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
- Climate variability and models
- Ocean Acidification Effects and Responses
- Coral and Marine Ecosystems Studies
- Isotope Analysis in Ecology
- Underwater Vehicles and Communication Systems
- Geology and Paleoclimatology Research
- Marine and coastal plant biology
- Atmospheric and Environmental Gas Dynamics
- Marine and fisheries research
Millennium Institute of Oceanography
2019-2023
University of Valparaíso
2023
University of Concepción
2015-2021
Millennium Science Initiative
2021
Agencia Nacional de Investigación y Desarrollo
2021
Universidad Católica del Norte
2011
The Humboldt eastern boundary upwelling system, due to its proximity the equator is highly sensitive equatorial Pacific disturbances, particularly those associated with El Niño Southern Oscillation (ENSO). This has consequences for so-called oxygen minimum zone, an extensive area of low waters at intermediate depths that impacts marine biota. During warm Nino events, OMZ tends shrink in upper margin along both Peru and central Chile but magnitude change characteristics events. Here,...
The analysis of synoptic satellite data total chlorophyll-a (Chl-a) and the environmental drivers that influence nutrient light availability for phytoplankton growth allows us to understand spatio-temporal variability biomass. In Panama Bight Tropical region (PB; 1–9°N, 79–84°W), spatial distribution Chl-a is mostly related seasonal wind patterns intensity localized upwelling centers. However, association between different physical variables still not fully assessed. this study, we evaluate...
Abstract We investigate the seasonal variability of southern tip (30°–38°S) eastern South Pacific oxygen minimum zone (OMZ) based on a high horizontal resolution (1/12°) regional coupled physical‐biogeochemical model simulation. The simulation is validated by available in situ observations and OMZ documented. OMZ, bounded contour 45 μM, occupies large volume (4.5x10 4 km 3 ) during beginning austral winter (3.5x10 at end spring, just 1 2 months after southward transport Peru‐Chile...
Oxygen minimum zones (OMZs) are extended oceanic regions for which dissolved oxygen concentration is extremely low. They suspected to be expanding in response global warming. However, currently, the mechanisms by OMZ varies climate variability still uncertain. Here, of subtropical off central Chile a regional coupled physical–biogeochemical model simulation was analyzed period 2000–2008, noting that its fluctuations were significant despite relatively weak amplitude El Niño/Southern...
Abstract Gliders have become an efficient and reliable oceanographic platform for measuring physical biogeochemical properties of the seawater, global glider fleet is rapidly expanding. In Chile, observations been carried out in very different environments, from mild upwelling region subtropical northern Chile to channels southern Patagonia. Herein, we briefly present results obtained oxygen minimum zone off Concepcion (∼36°30′S). Many new features observed this thanks relatively high...
Abstract Oceanic trenches are an important sink for organic matter (OM). However, little is known about how much of the OM reaching hadal region derives from sunlit surface ocean and other sources. We provide new insight into sources in Atacama Trench by examining elemental stable isotope composition carbon nitrogen bulk throughout entire water column down to bathyal sediments. Moreover, we estimated particulate (POC) concentration downward flux. Our results, based on two‐way variance...
The release of vast quantities sulfide from the sediment into water column, known as a sulfidic event, has detrimental consequences on fish catches, including downstream effects other linked element cycles. Despite being frequent occurrences in marine upwelling regions, our understanding factors that moderate event formation and termination are still rudimentary. Here, we examined biogeochemical hydrodynamic conditions underpinned formation/termination one largest sulfur plumes to be...
Abstract Many seaweed species are particularly important for passive marine dispersal, yet relatively little is known about their floating and stranding dynamics. Here, we studied these dynamics two kelp over four consecutive years at mid‐latitudes (30°S). Floating kelps were found during all seasons, but Macrocystis pyrifera was always more abundant than Durvillaea incurvata . Highest biomasses reached summer fall, whereas considerable stranded on nearby shores only observed summer. The...
Abstract Seven oceanographic expeditions were conducted between the years 2013 and 2018 to determine horizontal vertical distribution schemes in epipelagic mesopelagic copepod community structure of Caribbean Oceanic ecoregion (CAO) variables that regulate it. Four indicator species are suggested for North Equatorial Current Surface Water (CSW) mass ( Clausocalanus furcatus , Oncaea venusta Temora stylifera T. turbinate ) two deep-water masses such as Western Atlantic Central (NACW)...
<p>Modeling studies have shown that mesoscale eddies significantly contribute to modulate the variability of oxygen minimum zone (OMZ) eastern South Pacific at seasonal and interannual time scales. Nevertheless, only few observations properties these eddies. Particularly subsurface (intrathermocline) may play an important role in dynamics southern tip this OMZ. In work we analyze characteristics based on underwater glider observations, along with oceanographic cruises satellite...