Alberto Marcelo Mestas-Nunez

Alberto Marcelo Mestas-Nunez
University of Texas at San Antonio | UTSA · Department of Earth and Planetary Sciences

PhD

About

60
Publications
12,140
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
7,383
Citations
Introduction
Alberto Marcelo Mestas-Nunez currently works at the Department of Earth and Planetary Sciences, University of Texas at San Antonio. Alberto does research in Oceanography, Climatology and Remote Sensing.
Additional affiliations
September 2016 - present
University of Texas at San Antonio
Position
  • Associate Professor of Research
June 2013 - June 2016
Texas A&M University - Corpus Christi
Position
  • Professor (Associate)
January 2013 - June 2016
National Science Foundation
Position
  • Managing Director
Education
January 1987 - March 1996
Oregon State University
Field of study
  • Physical Oceanography

Publications

Publications (60)
Article
Full-text available
The spatial pattern of latent heat flux (LHF) variability associated with El Niño-Southern Oscillation (ENSO) is extracted using 15 years (1993–2007) of monthly satellite-derived LHF over the global ocean. This ENSO LHF footprint agrees well with the El Niño evaporation pattern reported previously with a 3-year (1996–1998) weekly version of this da...
Article
Full-text available
Many believe that the Central American Seaway closed near 4 Ma, and that that closure led to increased salinity in the Caribbean Sea and stronger Meridional Overturning Circulation in the Atlantic, which facilitated the waxing and waning of ice sheets in the northern hemisphere. We offer an alternative explanation for Caribbean salinification. The...
Article
Full-text available
A new method is developed to estimate daily turbulent air–sea fluxes over the global ocean on a 0.25° grid. The required surface wind speed (w 10) and specific air humidity (q 10) at 10 m height are both estimated from remotely sensed measurements. w 10 is obtained from the SeaWinds scatterometer on board the QuikSCAT satellite. A new empirical mod...
Preprint
Polynyas are key sites of ice production during the winter and are important sites of biological activity and carbon sequestration during the summer. The Amundsen Sea Polynya (ASP) is the fourth largest Antarctic polynya, has recorded the highest primary productivity and lies in an embayment of key oceanographic significance. However, knowledge of...
Article
The fine spatial resolution of the ICESat-2 (IS2) satellite altimeter allows monitoring the evolution of sea ice thickness with detailed dynamic information (e.g. ridges and leads). In this study, we first assess the ability of IS2 to estimate thermodynamic ice growth and dynamic thickening during the ice-growing season in the central Arctic Ocean....
Article
Full-text available
Sentinel-1 C-band synthetic aperture radar (SAR) images can be used to observe the drift of icebergs over the Southern Ocean with around 1-3 d of temporal resolution and 10-40 m of spatial resolution. The Google Earth Engine (GEE) cloud-based platform allows processing of a large quantity of Sentinel-1 images, saving time and computational resource...
Preprint
Full-text available
Polynyas are key sites of ice production during the winter and are important sites of biological activity and carbon sequestration during the summer. The Amundsen Sea Polynya (ASP) is the fourth largest Antarctic polynya, has recorded the highest primary productivity and lies in an embayment of key oceanographic significance. However, knowledge of...
Article
Full-text available
NASA’s ICESat-2 has been providing sea ice freeboard measurements across the polar regions since October 2018. In spite of the outstanding spatial resolution and precision of ICESat-2, the spatial sparsity of the data can be a critical issue for sea ice monitoring. This study employs a geostatistical approach (i.e., ordinary kriging) to characteriz...
Preprint
Full-text available
Sentinel-1 C-band synthetic aperture radar (SAR) images can be used to observe the drift of icebergs over the Southern Ocean with around 1–3 days of temporal resolution and 10–40 m of spatial resolution. The Google Earth Engine (GEE) cloud-based platform allows processing of a large quantity of Sentinel-1 images, saving time and computational resou...
Article
Full-text available
The measurement of sea ice elevation above sea level or the “freeboard” depends upon an accurate retrieval of the local sea level. The local sea level has been previously retrieved from altimetry data alone by the lowest elevation method, where the percentage of the lowest elevations over a particular segment length scale was used. Here, we provide...
Data
The AdjustaDepth TechnoEconomic Analysis was prepared by Mark E. Capron PE, Co-PI, under the direction of Kelly Lucas, PhD, PI and submitted April 3, 2019 to U.S. Department of Energy ARPA-E under Phase 1 Contract DE-AR0000916. Its 33 tabs present the cost and yield projections for growing Gracilaria tikvahiae in the Gulf of Mexico. It can be adapt...
Article
Full-text available
As part of the Polynyas and Ice Production in the Ross Sea (PIPERS) project, the IcePod system onboard the LC-130 aircraft based at McMurdo Station was flown over the Ross Sea, Antarctica in November 2016 and 2017, with the purpose of repeating the same lines that NASA’s Operation IceBridge (OIB) aircraft flew over in 2013. We resampled the lidar d...
Article
Full-text available
High sea ice production (SIP) generates high-salinity water, thus, influencing the global thermohaline circulation. Estimation from passive microwave data and heat flux models have indicated that the Ross Ice Shelf polynya (RISP) may be the highest SIP region in the Southern Oceans. However, the coarse spatial resolution of passive microwave data l...
Article
Full-text available
Sea ice acts as both an indicator and an amplifier of climate change. High spatial resolution (HSR) imagery is an important data source in Arctic sea ice research for extracting sea ice physical parameters, and calibrating/validating climate models. HSR images are difficult to process and manage due to their large data volume, heterogeneous data so...
Article
Full-text available
NASA's Operation IceBridge mission flew over the Ross Sea, Antarctica (20 and 27 November 2013) and collected data with Airborne Topographic Mapper (ATM) and Digital Mapping System (DMS). Using the DMS and reflectivity of ATM L1B, leads are detected to define local sea level height. The total freeboard is then obtained and converted to ice thicknes...
Poster
Full-text available
Test quality of glider mounted AD2CP current observations in the Northwestern Mediterranean (Ligurian) Sea using WMOP currents as a reference
Poster
Full-text available
High sea ice production (SIP) causes high-salinity water formation, influencing the global thermohaline circulation. Based on passive microwave data and a heat flux model, the Ross Ice Shelf polynya (RISP) region has been reported as the highest SIP region in the Southern Ocean. However, there are two limitations in previous methods: (1) the coarse...
Article
Full-text available
Global horizontal irradiance (i.e., shortwave downward solar radiation received by a horizontal surface on the ground) is an important geophysical variable for climate and energy research. Since solar radiation is attenuated by clouds, its variability is intimately associated with the variability of cloud properties. The spatial distribution of clo...
Technical Report
Full-text available
AdjustaDepth Project was funded by the U.S. Department of Energy Advanced Research Projects Agency - Energy to design an artificial reef system for growing and harvesting seaweed for advanced sustainable biofuels. The team discovered that the system grows more seaweed per hectare when it is part of a complete ecosystem with shellfish, finfish, and...
Article
Full-text available
Since the main attenuation of solar irradiance reaching the earth’s surface is due to clouds, it has been hypothesized that global horizontal irradiance attenuation and its temporal variability at a given location could be characterized simply by cloud properties at that location. This hypothesis is tested using global horizontal irradiance measure...
Article
Full-text available
Estimates of solar irradiance at the earth's surface from satellite observations are useful for planning both the deployment of distributed photovoltaic systems and their integration into electricity grids. In order to use surface solar irradiance from satellites for these purposes, validation of its accuracy against ground observations is needed....
Article
While many studies have described linkages between large-scale climate phenomena and precipitation and streamflow, fewer studies explicitly address the climatic modulations at sub-regional scales. This study quantifies statistically the temporal variability in precipitation and streamflow at a regional scale in the semi-arid area of South Texas ass...
Article
Surface winds (equivalent neutral wind velocities at 10 m) from scatterometer missions since 1992 have been used to build up a 20-year climate series. Optimal interpolation and kriging methods have been applied to continuously provide surface wind speed and direction estimates over the global ocean on a regular grid in space and time. The use of ot...
Article
Full-text available
Gum Hollow Delta is a small microtidal, aggradational to slightly progradational, hyperpycnal, tropical-cyclonedominated delta in Nueces Bay (Texas). The delta formed over the past 80 years following anthropogenically diverted, high sediment-laden stream runoff through Gum Hollow Creek into Nueces Bay. Gum Hollow Delta formed episodically due to hi...
Article
Full-text available
A study of the evolution of North Padre Island (southern Texas Gulf Coast) dunes was carried out using LIDAR topographic data, dune vibracores through the center of the dunes, and grab samples of shoreface sand at four locations along a cross-shore profile. Grain-size analyses of the vibracores show vertical variations in shoreface sand deposition...
Article
Full-text available
Uncertainties in turbulent ocean-atmosphere heat flux estimates, both among the estimates and between them and ground truth, suggest that further comparisons are needed. We analyze estimates from the French Research Institute for Exploitation of the Sea (IFREMER) and the Woods Hole Oceanographic Institution's Objectively Analyzed air-sea Fluxes (WH...
Article
Full-text available
The seasonal and interannual variability of moisture transports over the Intra-Americas Sea (including the Gulf of Mexico and the Caribbean Sea) is evaluated using the NCEP–NCAR global reanalysis. The seasonal variability of these moisture transports is consistent with previous studies and shows distinctive winter and summer regimes. Boreal winter...
Conference Paper
Full-text available
The Gulf of Mexico contains hundreds of active hydrocarbons seeps. Seepage in the Northern and Southern Gulf of Mexico tend to `leak' through conduits generated by salt techtonism and related processes. Hydrocarbons are then transported to the sea surface in oily bubbles, once on the surface the oil spreads into layers approximately .1µm thick, det...
Article
Full-text available
Several oceanic operational programs use remotely sensed fluxes to complement atmospheric operational analyses from major national weather prediction centers. The main goal of this study is to evaluate the ability of the ocean model (ORCA) to correctly simulate the dynamic of the tropical Pacific Ocean in 1996–98 when forced by the satellite turbul...
Article
Full-text available
The objective of our work is to estimate the net heat exchange across the air-sea interface in the tropical and subtropical Atlantic Ocean using mainly satellite data. The net flux and the various terms will be used to study the processes in the upper ocean related to changes in sea surface temperature (SST). This variable influences atmospheric ci...
Article
Full-text available
In this paper, we review interdecadal climatic variability in the eastern tropical Pacific Ocean. This variability dominates the climatic fluctuations in the North Pacific on scales between ENSO and the centennial trend and is commonly referred to as the Pacific Decadal Oscillation or PDO. We include a historical overview and a summary of observati...
Article
Full-text available
The seasonal and anomaly variability of satellite-derived weekly latent heat fluxes occurring over the global oceans during a 3-yr period (January 1996-December 1998) is investigated using EOF and harmonic analyses. The seasonal cycle of latent heat flux is estimated by least squares fitting the first three (annual, semiannual, and 4 month) harmoni...
Article
Full-text available
This study estimates discrepancies in moisture flux divergence in the Intra-Americas Sea (IAS; including the Gulf of Mexico and the Caribbean Sea) calculated using sounding observations, the NCEP Eta high-resolution regional analysis, and the NCEP-NCAR coarse-resolution global reanalysis. The main purpose of this exercise is to quantify the uncerta...
Article
Full-text available
This study estimates discrepancies in moisture flux divergence in the Intra-Americas Sea (IAS; including the Gulf of Mexico and the Caribbean Sea) calculated using sounding observations, the NCEP Eta high-resolution regional analysis, and the NCEP-NCAR coarse-resolution global reanalysis. The main purpose of this exercise is to quantify the uncerta...
Article
Full-text available
Satellite-derived estimates of weekly latent heat flux for the tropical and subtropical Atlantic Ocean (40°S to 40°N) were calculated for a one-year period from September 30, 1996 to September 28, 1997 (52 weeks). The oceanic variables required to estimate evaporation (sea surface temperature, surface wind speed, and surface air humidity) were obta...
Article
Full-text available
Surface fluxes of momentum, freshwater, and energy across the air-sea interface determine oceanic circulation and its variability at all timescales. The goal of this paper is to estimate and examine some ocean surface flux variables using satellite measurements. The remotely sensed data come from the European Remote Sensing (ERS) satellite scattero...
Article
Full-text available
We investigated different climatic factors affecting South Florida (climate divisions 4, 5 and 6) precipitation. The climatic indexes used here are based on over a century of global sea surface temperature anomalies. The climatic associations are studied for different seasons and in three frequency bands (intra-seasonal, inter-annual and decadal)....
Chapter
Full-text available
This chapter overviews modern climate variability on a planetary scale, with emphasis on climate manifestations in the Western Hemisphere. From instrumental observations taken, both atmospheric and oceanic variables considered their relationships on timescales ranging from interannual to multidecadal. Three of the most important climate modes are t...
Article
Full-text available
The years 1995 to 2000 experienced the highest level of North Atlantic hurricane activity in the reliable record. Compared with the generally low activity of the previous 24 years (1971 to 1994), the past 6 years have seen a doubling of overall activity for the whole basin, a 2.5-fold increase in major hurricanes (≥50 meters per second), and a five...
Article
Full-text available
North Atlantic sea surface temperatures for 1856-1999 contain a 65-80 year cycle with a 0.4°C range, referred to as the Atlantic Multidecadal Oscillation (AMO) by Kerr (2000). AMO warm phases occurred during 1860-180 and 1940-1960, and cool phases during 1905-1925 and 1970-1990. The signal is global in scope, with a positively correlated co-oscilla...
Article
Full-text available
North Atlantic sea surface temperatures for 1856–1999 contain a 65–80 year cycle with a 0.4 °C range, referred to as the Atlantic Multidecadal Oscillation (AMO) by Kerr [2000]. AMO warm phases occurred during 1860–1880 and 1940–1960, and cool phases during 1905–1925 and 1970–1990. The signal is global in scope, with a positively correlated co-oscil...
Article
Full-text available
Using an updated Kaplan et al. global SST anomaly (SSTA) dataset (1870-1999), we construct a canonical representation of El Niño-Southern Oscillation (ENSO). When this canonical ENSO is subtracted from the data, we are left with a residual (non-ENSO) dataset for SSTA that includes inter-seasonal to multi-decadal variability. Over the eastern equato...
Article
Full-text available
The properties (spatial orthogonality and temporal uncorrelatedness) of orthogonally rotated empirical modes depend on the normalization of the modes, prior to rotation. It is shown here that these properties also depend on how the empirical modes are formulated. The preferred convention is one that allows us to reconstruct the data from the unrota...
Chapter
Full-text available
In this chapter we review much of the recent work by others regarding the nature of the global modes of sea surface temperature (SST) variability and the SST involvement in interannual to multidecadal climate variability. We also perform our own analysis of global SST so as to describe the SST variability associated with El Niño/Southern Oscillatio...
Article
Full-text available
A varimax rotation was applied to the EOF modes of global SST derived by Enfield and Mestas-Nuñez (1999). The SST anomaly record is more than a century long, with a global complex EOF representation of ENSO and a linear trend removed at every grid point. The rotated EOF modes capture localized centers of variability that contribute to the larger sc...
Article
Full-text available
El Niño-Southern Oscillation (ENSO) is a global phenomenon with significant phase propagation within and between basins. We capture and describe this in the first mode of a complex empirical orthogonal function (CEOF) analysis of sea surface temperature anomaly (SSTA) from the mid-19th century through 1991. We subsequently remove the global ENSO fr...
Article
Full-text available
Several kinds of analysis are applied to the departures of sea surface temperatures from climatology (SSTA, 1856-1991) to determine the degree to which SSTA of opposite sign in the tropical North and South Atlantic occur. Antisymmetric ("dipole") configurations of SSTA on basin scales are not ubiquitous in the tropical Atlantic. Unless the data are...
Article
Full-text available
Accurate records of basinwide Atlantic and U.S. landfalling hurricanes extend back to the mid 1940s and the turn of the century, respectively, as a result of aircraft reconnaissance and instrumented weather stations along the U.S. coasts. Such long-term records are not exceeded elsewhere in the tropics. The Atlantic hurricanes, U.S. landfalling hur...
Article
Full-text available
The Gulf of Mexico (GOM) circulation is simulated using the DieCAST ocean model, with a horizontal resolution of 1/12 and 20 vertical layers. The results compare well with observations of both large and small scale features, including Loop Current frontal occlusions associated with frontal eddies. The simulation is carried out without any data assi...
Article
Full-text available
Two and three-dimensional oceanic flows around small islands patterned after Barbados, W.I. (13° 10′ N latitude: 59° 30′ W longitude) were modeled numerically to investigate island wake effects. The two-dimensional simulations closely agreed with laboratory flows, for both attached and shedding wake regimes. As expected, results for a flat bottom c...
Article
Full-text available
Changes in sea level in the South Pacific from July to September 1978 are estimated from Seasat scatterometer vector wind data based on Sverdrup dynamics assuming a flat-bottom barotropic ocean. These changes in Sverdrup sea level are compared with the changes in sea level observed by the Seasat altimeter for the same time period. The sea level cha...
Article
Full-text available
Four years of ocean vector wind data are used to evaluate statistics of wind stress over the ocean. Raw swath wind stresses derived from the Quick Scatterometer (QuikSCAT) are compared with five different global gridded wind products, including products based on scatterometer observations, meteorological analysis winds from the European Centre for...
Article
Full-text available
Seasat scatterometer and altimeter data are analyzed to investigate time-dependent Sverdrup dynamics in the Southern Ocean (40°S to 60°S) over seasonal time scales. Sverdrup dynamics are shown to be inadequate to describe the circulation in the South Atlantic and Indian oceans. The Sverdrup circulation in the South Pacific is reasonable north of 55...
Article
Full-text available
Three months of vector wind observations from the Seasat-A satellite scatterometer (SASS) were used to construct gridded fields of monthly average wind stress and wind stress curl over the global ocean. These fields were examined to identify features either poorly resolved or not present in wind stress fields constructed from conventional data. Par...
Article
Full-text available
The specific objectives of this paper emphasize estimation of global latent heat flux over the oceans with high spatial and temporal resolution using satellite radar and radiometer measurements. Consistency of the same surface parameters retrieved from several satellites is assured. The flux fields are compared to in-situ observations and atmospher...
Article
Full-text available
1] Both the annual number of Atlantic tropical storms forming south of 23.5°N and of Atlantic major hurricanes increased between the 1970's/1980's and 1995 – 2000. These increases are coincident with a multi-decadal warming in North Atlantic SST suggesting that the high activity of 1995 – 2000 may persist for the next $10 to 40 years. However, duri...

Questions

Question (1)
Question
"Participation of underrepresented minorities has long been an issue for science and engineering occupations, with participation rates well below that of whole population demographics as well as all occupational categories. Since 2007, the percentage of underrepresented minorities working in science and engineering occupations has ranged between 15% to 25% below that of whole population demographic trends with environmental science and geoscience occupations having the lowest participation rates."
From:

Network

Cited By

Projects

Projects (6)
Project
Identify and explain lin