M. Dolores Pérez-Hernández

M. Dolores Pérez-Hernández
Universidad de Las Palmas de Gran Canaria | ULPGC · Instituto Universitario de Oceanografía y Cambio Global (IOCAG)

Ph.D. in Physical Oceanography

About

38
Publications
8,603
Reads
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469
Citations
Citations since 2016
22 Research Items
426 Citations
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2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Additional affiliations
October 2019 - present
Universidad de Las Palmas de Gran Canaria
Position
  • PostDoc Position
August 2017 - October 2019
Marine and Freshwater Research Institute
Position
  • Researcher
May 2015 - May 2018
Woods Hole Oceanographic Institution
Position
  • PostDoc Position
Education
September 2009 - July 2011
September 2004 - July 2009

Publications

Publications (38)
Article
Full-text available
Monthly mapped sea level anomalies (MSLA) of the NW Atlantic in the region immediately downstream of the Gulf Stream (GS) separation point reveal a leading mode in which the path shifts ca.100km meridionally about a nominal latitude of 39° N, producing coherent sea level anomaly (SLA) variability from 72° W to 50° W. This mode can be captured by us...
Article
Full-text available
The Atlantic Meridional Overturning Circulation (AMOC) plays a vital role in global climate, redistributing heat, and freshwater. It is predicted to decline due to anthropogenic climate change, with major implications for global climate. Accurately assessing AMOC strength with in situ observations has inspired a number of dedicated observing system...
Article
Full-text available
The global upper ocean has been warming during the last decades accompanied with a chlorophyll‐a (Chl‐a) and productivity decrease. Whereas subtropical gyres show similar trends, Eastern Boundary Upwelling Systems are thought to increase in productivity due to increased trade winds. This study analyzes recent trends in sea surface temperature (SST)...
Article
Full-text available
Poleward undercurrents are well-known features in Eastern Boundary upwelling systems. In the California Current upwelling system, the California poleward undercurrent has been widely studied, and it has been demonstrated that it transports nutrients from the equatorial waters to the northern limit of the subtropical gyre. However, in the Canary Cur...
Article
Full-text available
[[Accepted for publication in Journal of Geophysical Research: Oceans. Copyright (2020) American Geophysical Union. Further reproduction or electronic distribution is not permitted.]] Atlantic Water (AW) enters the Arctic through Fram Strait as the West Spitsbergen Current (WSC). When reaching the south of Yermak Plateau, the WSC splits into the S...
Article
Full-text available
[[An edited version of this paper was published by AGU. Copyright (year) American Geophysical Union.]] The Atlantic Water (AW) inflow through Fram Strait, largest oceanic heat source to the Arctic Ocean, undergoes substantial modifications in the Western Nansen Basin (WNB). Evaluation of the Mercator system in the WNB, using 1,500 independent tempe...
Article
Full-text available
Data from repeat hydrographic surveys over the 25‐year period 1993 to 2017, together with satellite altimetry data, are used to quantify the temporal and spatial variability of the North Icelandic Irminger Current (NIIC), East Icelandic Current (EIC), and the water masses they advect around northern Iceland. We focus on the warm, salty Atlantic Wat...
Article
Full-text available
Four hydrographic cruises carried out between ~26.5 and 31°N in the eastern North Atlantic Subtropical Gyre in fall (2016 and 2017) and spring (2017 and 2018) are used to identify water masses and infer oceanic circulation. Geostrophic velocities are initially adjusted by referencing them to data from a Lower Acoustic Doppler Current Profiler (LADC...
Poster
Full-text available
The characteristics and seasonality of the Svalbard branch of the Atlantic Water (AW) boundary current in the Eurasian Basin are investigated using data from a six-mooring array deployed near 30 o E between September 2012 and September 2013. The instrument coverage extended to 1200 m depth and approximately 50 km offshore of the shelfbreak, which l...
Article
Full-text available
A coordinated atmosphere-ocean research project, centered on a rare wintertime field campaign to the Iceland and Greenland Seas, seeks to determine the location and causes of dense water formation by cold-air outbreaks. The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere-ocean research program investigating climate processes in the...
Article
Full-text available
The characteristics and seasonality of the Svalbard branch of the Atlantic Water (AW) boundary current in the Eurasian Basin are investigated using data from a six-mooring array deployed near 30°E between September 2012 and September 2013. The instrument coverage extended to 1,200-m depth and approximately 50 km offshore of the shelf break, which l...
Article
A World Ocean Circulation Experiment Hydrographic Program along with a Global Repeat Hydrography Program occupied sections along 66°W in the North West Atlantic Ocean in 2003 and 2012. Hydrographic variables, tracers and LADCP measurements were collected in situ. This section together with the North American and South American Coasts create a close...
Article
We quantify Atlantic Water heat loss north of Svalbard using year-long hydrographic and current records from three moorings deployed across the Svalbard Branch of the Atlantic Water boundary current in 2012–2013. The boundary current loses annually on average 16 W m⁻² during the eastward propagation along the upper continental slope. The largest ve...
Article
Full-text available
Transports of suspended particulate (POCsusp) and dissolved (DOC) organic carbon are inferred from a box-model covering the eastern boundary of the North Atlantic subtropical gyre. Corresponding net respiration rates (R) are obtained from a net organic carbon budget that is based on the transport estimates, and includes both vertical and lateral fl...
Poster
Full-text available
Atlantic Water (AW) carries a vast amount of heat and salt into the Arctic Ocean, circulating through the various basins via a system of boundary currents. This fundamentally influences the hydrographic structure of the Arctic and ventilates the lower halocline. Despite the importance of AW to the Arctic system, we presently don’t know how much AW...
Article
A South Atlantic ring is studied through remote sensing altimetry, hydrographic stations, and drifters' trajectories. The ring's core was characterized by warmer and saltier Indian Ocean waters. At the time of the cruise, the ring's signature extended radially out to 124 km and vertically down to 2000 m, and its core absolute dynamic topography (AD...
Article
Full-text available
Decadal differences in the Falkland Plateau are studied from the two full-depth hydrographic data collected during the ALBATROSS (April 1999) and MOC-Austral (February 2010) cruises. Differences in the upper 100 dbar are due to changes in the seasonal thermocline, as the ALBATROSS cruise took place in the austral fall and the MOC-Austral cruise in...
Article
The Atlantic meridional overturning circulation (AMOC) is continually monitored along 26°N by the RAPID-MOCHA array. Measurements from this array show a 6.7 Sv seasonal cycle for the AMOC, with a 5.9 Sv contribution from the upper-mid-ocean. Recent studies argue that the dynamics of the eastern Atlantic is the main driver for this seasonal cycle; s...
Article
Data from a shipboard hydrographic/velocity survey carried out in September 2013 of the region north of Svalbard in the Nansen Basin are analyzed to characterize the Atlantic Water (AW) boundary current as it flows eastward along the continental slope. Eight meridional transects across the current, spanning an alongstream distance of 180 km, allow...
Article
This study examines the seasonal cycle of the Atlantic Meridional Overturning Circulation (AMOC) and its eastern boundary contributions. The cycle has a magnitude of 6 Sv, as measured by the RAPID/MOCHA/WBTS project array at 26°N, which is driven largely by the eastern boundary. The eastern boundary variations are explored in the context of the reg...
Thesis
Full-text available
NCEP Wind-stress and temperature and salinity data from Argo have been used together with a steady model to estimate the meridional velocity and volume and heat transport in the Equatorial Indian Ocean for a seven years period (2003-2009). Total volume transport of the wind stress curl shows a northward and southward flow for theWinter and Summer M...
Technical Report
Full-text available
This cruise report covers scientific operations conducted during RRS James Cook Cruise 103. The purpose of the cruise was the refurbishment of an array of moorings spanning the latitude of 26.5°N from the Bahamas to the Canary Islands. Cruise JC103 departed from Port of Spain on Wednesday 23rd April 2014, calling twice at Nassau, Bahamas before fin...
Article
Transatlantic hydrographic sections along latitudes 7.5N and 24.5N have been repeated with about 20 years difference, at the beginning of the 1990s and 2010s. For each period, an inverse model is applied to the closed box bound by both sections. The model imposes mass conservation for individual layers, defined by isoneutral surfaces, and the whole...
Poster
Full-text available
The source of the Canary Current has been inferred from an inverse box model applied to the hydrographic data of a survey carried out in 2009 in the northeast subtropical gyre (29–37°N, 9–24°W). The Portugal Current is observed between 13.5 and 14.8°W at 37°N carrying inline image Sv southward. This current presumably merges with the eastward trans...
Poster
Full-text available
Transatlantic hydrographic sections along latitudes 7.5N and 24.5N have been repeated with about 20 years di erence, at the beginning of the 1990s and 2010s. For each period, an inverse model is applied to the box bound by both sections. The model imposes mass conservation for individual layers, de ned by isoneutral surfaces, and the whole water co...
Article
1] Dinitrogen (N 2) fixation and dissolved organic nitrogen (DON) release rates were measured on fractionated samples (>10 mm and <10 mm) along 24.58N in the subtropical North Atlantic. Net N 2 fixation rates (N 2 assimilation into biomass) ranged from 0.01 to 0.4 nmol N L À1 h À1 , and DON release rates ranged from 0.001 to 0.09 nmol N L À1 h À1 ....
Article
[1] The source of the Canary Current has been inferred from an inverse box model applied to the hydrographic data of a survey carried out in 2009 in the northeast subtropical gyre (29–37°N, 9–24°W). The Portugal Current is observed between 13.5 and 14.8°W at 37°N carrying Sv southward. This current presumably merges with the eastward transport of t...
Article
Full-text available
NCEP Wind-stress and temperature and salinity data from Argo have been used together with a steady model to estimate the meridional velocity and volume and heat transport in the Equatorial Indian Ocean for a seven years period (2003-2009). Total volume transport of the wind stress curl shows a northward and southward flow for theWinter and Summer M...
Article
Full-text available
High spatial resolution hydrographic data, including Lowered Acoustic Doppler Current Profiler (LADCP) measurements, were acquired along a meridional section at 24.5W in October 2009. The data are analyzed in detail with the purpose of definitively defining and quantifying the zonal Azores Current System. The Azores Current and Azores Countercurren...
Thesis
Full-text available
NCEP Wind-stress and temperature and salinity data from Argo have been used together with a steady model to estimate the meridional velocity and volume and heat transport in the Equatorial Indian Ocean for a seven years period (2003-2009). Total volume transport of the wind stress curl shows a northward and southward flow for the Winter and Summer...

Questions

Question (1)
Question
There is a wide variety of winds, from observations and models. I always use several of them and compare between results. This leads me to the question of which to trust more in each region. I thought that perhaps we can talk about which wind do you use/trust more, where and why?

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Cited By

Projects

Projects (6)
Archived project
The stability of the Earth’s climate depends on the transport of different properties by the Meridional Overturning Circulation (MOC). Surface waters become deep waters at high latitudes, from where they slowly reach all the deep oceans, reconvert to intermediate waters and return to the surface, mainly in the Antarctic and equatorial Atlantic. This belt transports heat, fresh water, carbon and nutrients, among other properties. Each of these properties has a temporal oceanic memory (Memoria Oceánica del Clima – MOC in Spanish) and has the capacity of controlling future climate. Probably the least well know part of this belt, but yet a most important one, is the path and transformation experienced by the intermediate waters, from the Southern Ocean to the Equatorial Atlantic. The main objective of this project is to investigate the transport and transformations experienced by the intermediate waters in their trip from the Austral Ocean until their reincorporation to the surface waters in the Equatorial Atlantic. With this objective we will determine the fluxes of mass, heat, fresh water, carbon and nutrients from the Southern Ocean until the Equatorial region, and we will quantify the incorporation of intermediate waters to the surface ocean in the Equatorial Atlantic. To obtain these results we will develop different models, and carry out and analyze different data set, from an interdisciplinary perspective. This includes the analysis of several public dataset, calibration efforts for a new satellite sensor, cruises measuring physical, chemical and biological variables, idealized and general circulation models, and the further development of autonomous drifting buoys.
Project
The Malaspina circumnavigation expedition was an interdisciplinary research project to assess the impact of global change on the oceans and explore their biodiversity. The 250 scientists on board the Hespérides and Sarmiento de Gamboa embarked on an eight-month expedition (starting in December 2010) scientific research with training for young researchers - advancing marine science and fostering the public understanding of science. The project was under the umbrella of the Spanish Ministry of Science and Innovation's Consolider – Ingenio 2010 programme and was led by the Spanish National Research Council (CSIC) with the support of the Spanish Navy. It is named after the original scientific Malaspina Expedition between 1789 and 1794, that was commanded by Alejandro Malaspina. Due to Malaspina's involvement in a conspiracy to overthrow the Spanish government, he was jailed upon his return and a large part of the expedition's reports and collections were put away unpublished, not to see the light again until late in the 20th century.
Archived project
Some controversies existed on wether the Canary Current was a southward extention of the Portugal Current or an eastern branch of the Azores Current. The ORCA project was born to solve this controversy by sampling the eastern boundary of the Subtropical Gyre during fall 2009. A total of 91 stations covering the region 28.5-37.0 ºN and 9.1-24.5ºW During fall, the Canary Current is on its stronger state.