Martin Montes

Martin Montes
1.Science Systems and Applications, Inc., 2.NASA, GSFC, 3.Florida Atlantic University, HBOI

PhD

About

56
Publications
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Introduction
Martin Montes currently works at NASA Goddard Space Flight Center, SSAI, Maryland, USA. Martin does research in Remote Sensing and Oceanography. Current projects include LiDAR inversion algorithms and improvement of aerosol classification over inland waters for atmospheric correction of high spatial resolution satellite optical imagery

Publications

Publications (56)
Article
Full-text available
A multispectral backscattering LiDAR (Light detection and range) system (hereafter Oculus) was integrated into a wave glider and used to estimate the scattering order (i.e., single vs multiple collisions) of LIDAR backscattering, the water inherent optical properties (IOPs), the biogeo-chemical characteristics of particulate scatterers (i.e., relat...
Article
Full-text available
Range-resolved detection of submerged scattering layers was investigated in the Gulf of Mexico based on vertical profiles made with a LiDAR (Light detection and range) system having a green laser (wavelength λ = 532 nm). The backscattering power (Sd) variability was decomposed in principal components (PCs) and related to non-polarized Sd, the Sd ra...
Article
Full-text available
Mass-specific absorption (ai∗(λ)) and scattering (bi∗(λ)) coefficients were derived for four size fractions (i = 0.2–0.4, 0.4–0.7, 0.7–10, and > 10 µm, λ = wavelength in nm) of suspended particulate matter (SPM) and with samples obtained from surface waters (i.e., 0–2 m depth) of the Saint Lawrence Estuary and Saguenay Fjord (SLE-SF) during June of...
Article
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Mass-specific absorption (aSPM*) and scattering (bSPM*) coefficients of suspended particulate matter (SPM) were measured for different size (0.2–0.4 µm, 0.4–0.7 µm, 0.7–10 µm, and >10 µm) and chemical (organic- vs mineral-rich) fractions in surface waters (i.e., 0–5 m depth) of the Saint Lawrence Estuary and Saguenay Fjords (SLE-SF) during spring o...
Article
The coastal waters of the West Antarctic Peninsula (WAP) are associated with large phytoplankton blooms dominated by large (>20 μm) diatoms however, nanoplankton (<20 μm) are also an important component of the food web. The dominant nanoflagellates in the WAP are cryptomonad algae. Using a twenty-year time series collected by the Palmer Long Term E...
Chapter
Full-text available
Applications LiDAR aux eaux côtières, aux eaux continentals et en océanographie
Article
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Tank experiments were performed at different water turbidities to examine relationships between the beam attenuation coefficient (c) and Weibull shape parameters derived from LiDAR waveforms measured with the Fine Structure Underwater LiDAR (FSUIL). Optical inversions were made at 532 nm, within a c range of 0.045-1.52 m-1 , and based on a LiDAR sy...
Chapter
The first LiDAR systems applied to aquatic environments were developed for underwater imaging by the US navy, This pioneer LiDAR system was developed by Radio Corporation of America (RCA) for conducting moreefficient military operations and improving the safety of divers. This primitive LiDAR was characterized by a blue-green laser with a laser pul...
Article
Full-text available
An empirical optical model for estimating the concentration of suspended particulate matter (CSPM) was developed in the upper part of the Saint Lawrence Estuary based on remote sensing reflectance (Rrs) measurements corresponding to medium-resolution imaging spectrometer (MERIS) spectral channels 7 and 9 (i.e., wavelengths centered at 665 and 708 n...
Article
The inversion of individual inherent optical properties (IOPs) is very challenging in optically complex waters and within the violet spectral range (i.e., 380-450 nm) due to the strong light attenuation caused by chromophoric dissolved organic matter, non-algal particulates and phytoplankton. Here, we present a technique to better discriminate ligh...
Article
Full-text available
The mapping of nearshore bathymetry based on spaceborne radiometers is commonly used for QC ocean colour products in littoral waters. However, the accuracy of these estimates is relatively poor with respect to those derived from Lidar systems due in part to the large uncertainties of bottom depth retrievals caused by changes on bottom reflectivity....
Conference Paper
Full-text available
The development of Phaeocystis cf globosa blooms in coastal waters off Viet Nam represents a major ecological problem that impact regional economical activities linked to fisheries and tourism. The objective of this study is to elaborate a technique for mapping P. globosa distributions off the Viet Nam coast based on satellite-derived ocean color o...
Conference Paper
LiDAR bathymetric biases due to geometric changes at the air-water and water-bottom interfaces are investigated based on calculations made with a modified version of the waveform simulator Wa-LID. Main assumptions include a homogeneous water column and a spaceborne LiDAR having a footprint smaller than 50 m and a wavelength centered at 532 nm. Prel...
Article
Full-text available
The understanding of phytoplankton dynamics in the Gulf of the Saint Lawrence (GSL) is critical for managing major fisheries off the Canadian East coast. In this study, the accuracy of two atmospheric correction techniques (NASA standard algorithm, SA, and Kuchinke's spectral optimization, KU) and three ocean color inversion models (Carder's empiri...
Article
Historical regional budgets of suspended particulate matter (SPM) in surface waters (i.e., 0-20 m depth) of the St. Lawrence Estuary (SLE) are not very accurate because of the lack of in situ measurements. The aim of this study was to improve the accuracy of SPM budgets in the SLE based on spaceborne ocean color measurements by investigating one ki...
Conference Paper
The use of MERIS-derived remote sensing reflectance ratios Rrs(705)/Rrs(665) and Rrs(750)/Rrs(665) have been highly successful for estimating chlorophyll concentration in diverse turbid coastal environments of the USA (Gilerson et al., 2010). Here, the response of these optical proxies with respect to changes on concentration and mineral content of...
Article
Full-text available
Spaceborne chlorophyll indices based on red fluorescence (wavelength = 680 nm) and water leaving radiance (L-w) in the visible spectrum (i.e., 400-700 nm) were evaluated in the St Lawrence Estuary (SLE) during September of 2011. Relationships between chlorophyll concentration (chl) and fluorescence were constructed based on fluorescence line height...
Article
Full-text available
1] Seasonal coherence between satellite-derived phytoplankton parameters (chlorophyll a concentration (Chl) and phytoplankton bloom initiation time (BIT)), environmental variables (sea ice concentration, surface solar radiation, and wind speed), and climate patterns (El Niño 3.4, the Southern Annular Mode, the Pacific South America pattern, the sem...
Article
Optical and chemical measurements were obtained in the St. Lawrence Estuary during spring of 2000 and 2001 to develop three biogeo-optical models for estimating concentration of suspended particulates (SPM) in optically complex waters where light absorption in the visible range is dominated by coloured dissolved organic matter (CDOM). SPM was compu...
Article
Subsurface optical layers distributed at two different depths were investigated in Monterrey Bay, East Sound, and the Black Sea based on spatial statistics of remote sensing reflectance (Rrs). The main objective of this study was to evaluate the use of Rrs(443)/Rrs(490) (hereafter R1) skewness (ψ) as an indicator of vertical optical structure in di...
Article
Full-text available
Relationships between the satellite-derived diffuse attenuation coefficient of downwelling irradiance (K(d)) and airborne-based vertical attenuation of lidar volume backscattering (α) were examined in two coastal environments. At 1.1 km resolution and a wavelength of 532 nm, we found a greater connection between α and K(d) when α was computed below...
Data
1] Seasonal coherence between satellite-derived phytoplankton parameters (chlorophyll a concentration (Chl) and phytoplankton bloom initiation time (BIT)), environmental variables (sea ice concentration, surface solar radiation, and wind speed), and climate patterns (El Niño 3.4, the Southern Annular Mode, the Pacific South America pattern, the sem...
Article
The Palmer, Antarctica LTER builds on meteorological, ocean color and seabird observations since the late 1970s. It occupies annually in summer a regional-scale grid extending 700 km northward from Charcot Island to Anvers Island, and 200 km cross-shelf from the coast to the shelfbreak. In addition to routine CTD profiles and zooplankton tows throu...
Article
Detection of sub-surface optical layers in marine waters has important applications in fisheries management, climate modeling, and decision-based systems related to military operations. Concurrent changes in the magnitude and spatial variability of remote sensing reflectance (Rrs) ratios and submerged scattering layers were investigated in coastal...
Article
Full-text available
The Southern Ocean is a climatically sensitive region that plays an important role in the regional and global modulation of atmospheric CO(2). Based on satellite-derived sea ice data, wind and cloudiness estimates from numerical models (National Centers for Environmental Prediction-National Center for Atmospheric Research reanalysis), and in situ m...
Article
Full-text available
Optical properties derived from ocean color imagery represent vertically-integrated values from roughly the first attenuation length in the water column, thereby providing no information on the vertical structure. Robotic, in situ gliders, on the other hand, are not as synoptic, but provide the vertical structure. By linking measurements from these...
Article
Full-text available
Characterization of 3-D underwater light fields from above the sea surface requires passive and active remote sensing measurements. In this work, we suggest the use of passive ocean color sensors and lidar (Light Detection and Ranging) to examine the vertical structure of optical properties in marine waters of the Northern Part of the Gulf of Alask...
Article
Full-text available
The climate of the western shelf of the Antarctic Peninsula (WAP) is undergoing a transition from a cold-dry polar-type climate to a warm-humid sub-Antarctic-type climate. Using three decades of satellite and field data, we document that ocean biological productivity, inferred from chlorophyll a concentration (Chl a), has significantly changed alon...
Article
Full-text available
Contribution of heterotrophic marine bacteria (HB) to the particulate beam attenuation coefficient (c(p)) was estimated as a function of latitude in diverse marine regions. Calculations were based on Surface measurements (0 to 20 in depth) of bacterial abundance and biovolume, physio-optical empirical relationships, and light. scattering models. Re...
Article
Full-text available
Spatial ocean-observing technologies are permitting researchers to collect data for sustained periods on broad continental shelves. Key technologies used are satellites, high-frequency (HF) radar, and autonomous underwater gliders, which together have allowed study of Mid-Atlantic Bight (MAB) dynamics for the past decade. MAB stratification is the...
Article
The temporal and spatial variability of phytoplankton size structure of waters west of the Antarctica Peninsula (WAP) was investigated between 1997 and 2006. Time series of satellite-derived (phytoplankton size structure index or γbbp, chlorophyll a concentration or chlT, and sea-ice extent) and shipboard (temperature, salinity, nutrients, and mixe...
Article
We report on results of a long-term (1993-2007) time series sediment trap moored at 170 m to the west of the Antarctic Peninsula in the mid-continental shelf region (350 m depth; 64°30′S, 66°00′W). This is a region characterized by late spring-summer diatom blooms, moderately high seasonal primary productivity (50-150 mmol C m-2 d-1 in December-Feb...
Article
Full-text available
Remote‐sensing models based on total (b b) and particle (b bp) backscattering are proposed for estimating phytoplankton size‐structure characteristics over the Western Antarctic Peninsula (WAP) waters. It is hypothesized that phytoplankton assemblages with larger cells will have lower spectral b b and b bp slopes (γ). Likewise, a higher concentrati...
Article
Full-text available
Variability of particulate beam attenuation coefficient at 532 nm (cp (532)) and microbial planktonic community (heterotrophic bacteria and phytoplankton) was analyzed in coastal waters of Southern California. The goal of this study was to explore heterotrophic bacteria (HB) response (cell abundance, BA, and carbon production, BCP) with respect to...
Article
Full-text available
Long-term impact of the Pacific oyster Crassostrea gigas farms on the phytoplankton biomass as chlorophyll a concentration (chl-a), abundance and productivity (PP) of the western arm of Bahía San Quintín (Falsa Bay), a coastal lagoon influenced by the California Current coastal upwelling, was evaluated after two decades of commercial cultures. High...
Article
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In order to understand the relationships between the dynamics of phytoplankton populations in the surface microlayer (MIL) and in the water column below (SSW), this study used high-performance liquid chromatography-derived pigment markers in samples from a coastal lagoon of Baja California (Estero de Punta Banda, EPB) under summer (October 2003) an...
Article
Full-text available
Empirical relationships to estimate vertical attenuation coefficient of photosynthetically available radiation (KPAR) using Secchi disk, vertical black disk, and horizontal sighting ranges for San Quintín Bay, Baja California, were developed. Radiometric PAR profiles were used to calculate KPAR. Vertical (ZD) and horizontal (HS) sighting ranges wer...
Article
Empirical airborne remote-sensing relationships were examined to estimate chlorophyll a concentration in the first optical depth (chlFOD) of coastal waters of Afgonak/Kodiak Islands during July–August 2002. Band-ratio and spectral-curvature models were tested using satellite remote-sensing reflectance (Rrs(λ)) measurements. Additional shipboard and...
Article
The widespread use of laser line scanners (LLS) aboard autonomous underwater vehicles (AUV) and remotely operated vehicles (ROV) in the last decade has opened a unique window to a series of homeland security applications. Numerical experiments were performed to calculate the target signal and the effect of background medium (bottom, water) signals...
Article
There are 361 ports of interest to the US Coast Guard regarding homeland security issues. Speed and accuracy of inspections there for "foreign objects" is critical to maintaining the flow of commerce through these ports. A fusion of acoustic and optical imaging technologies has been implemented to rapidly locate anomalies acoustically and inspect t...
Article
Full-text available
Benthic metabolism was measured at 3 representative lagoon bottom sites in San Quintin Bay, Baja California, Mexico, during winter and summer from 1997 to 2000. At each site, and in every sampling period, three 0.5 m diameter transparent acrylic hemispherical domes were installed on bare sediment for ~24 h to determine fluxes of dissolved inorganic...
Article
Full-text available
Seasonal and annual integrated phytoplankton production (AIP) of a shallow lagoon of the NW coast of Baja California, Estero de Punta Banda, was estimated during inverse-estuarine conditions in 1998 and 1999, a non-El Nino year. Estero de Punta Banda is a coastal lagoon with no city/industrial waste input; its primary production is comparable to th...
Article
Full-text available
Attenuation of photosynthetically available radiation (PAR) measured using a light meter, was related to Secchi disk, horizontal black disk and horizontal sighting ranges observed in a coastal lagoon of the Southern California Current System. Vertical attenuation coefficient (KPAR) was calculated from radiometric PAR profiles. Vertical (ZD) and hor...
Article
Full-text available
We generated photosynthesis–irradiance (P–E) and phytoplankton absorption data for a coastal lagoon of northwestern Baja California. This was done for different seasons and tidal conditions. Using the vertical attenuation coefficient of light we partitioned the lagoon into two regions to run the 14C incubation experiments: an outer and an inner reg...
Article
Empirical relationships to estimate vertical attenuation coefficient of photosynthetically available radiation (KPAR) using Secchi disk, vertical black disk, and horizontal sighting ranges for San Quintín Bay, Baja California, were developed. Radiometric PAR profiles were used to calculate KPAR. Vertical (ZD) and horizontal (HS) sighting ranges wer...
Article
Long-term impact of the Pacific oyster Crassostrea gigas farms on the phytoplankton biomass as chlorophyll a concentration (chl-a), abundance and productivity (PP) of the western arm of Bahía San Quintín (Falsa Bay), a coastal lagoon influenced by the California Current coastal upwelling, was evaluated after two decades of commercial cultures. High...
Article
In this work we explore potential relationships between particle beam attenuation at 660 nm (cp), chlorophyll a concentration (chl), heterotrophic bacteria abundance (BA) and carbon productivity (BCP) in oceanic waters of different latitudes, trophic levels, and upwelling conditions. It is hy- pothesized that cp is positively related to BA and BCP...
Article
Full-text available
Distribution of total suspended particulate matter (SPM) in the St Lawrence estuary was investigated based on spaceborne ocean colour measurements. Biogeo-optical models were constructed and validated with in situ biogeochemical and optical data obtained during spring of 2000 and 2001. The resulting remote sensing reflectance (R rs) model was appli...

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