Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 101 for “"In situ data"”.
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Phytoplankton dynamics in lakes and the Baltic Sea: a combination of satellite and in situ data
Fütoplankton on veekogude toiduvõrgustike alus ning mängib võtmerolli toitainete ja maailma kliima reguleerimisel. Kuid kui tingimused on sobivad, võivad mõned liigid, eriti tsüanobakterid, moodustada kahjulikke õitsenguid, mis ohustavad ökosüsteeme ja inimeste tervist. Antud töö uurib, kuidas neid …
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Time variability of sea surface parameters in the tropical Atlantic using satellite and in situ data
The influence of the tropical Atlantic Ocean over the climate of Europe, Africa and America is well known today. However, several questions about high-frequency processes in this region remain open. This thesis addresses the characterisation of the diurnal and other short timescale variability of …
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Hydrographic conditions of a continental shelf region in the Northwest African Upwelling System from in-situ data
This study investigates the hydrographic and dynamic properties of the continental shelf region between Cape Juby (28.5 °N) and Agadir (30.4 °N) within the Moroccan Sub-region of the North West African Upwelling System. Data came from two cruises conducted in June (beginning of summer) and November …
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UNDERSTANDING OF THE VARIABILITY OF PHYTOPLANKTON ECOSYSTEM FUNCTION PROPERTIES: A SYNERGISTIC USE OF REMOTE SENSING AND IN SITU DATA
… Almost every part of the aquatic regime is dominated by microscopic plants called phytoplankton. Being at the bottom of the food chain, these ecological drivers influence the earth's climate system as well as the biodiversity trends of other organisms such as zooplankton, fish, sea birds and …
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Multispectral classification and reflectance of glaciers: in situ data collection, satellite data algorithm development, and application in Iceland & Svalbard
… of the hydrological cycle, are key to understanding regional and global climate change, and are important contributors to global sea level rise, regional water resources and local biodiversity. Multispectral (visible and near-infrared) remote sensing has been used for studying GIC and their …
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Comparing in situ and satellite temperature data on the Agulhas Bank to understand changes in anchovy (Engroulis encrasicolus) distribution
Satellite data have high spatial/ temporal resolution, extensive coverage and are easily accessible, making them a common part of many studies on the oceans. One such important study to use satellite data found a relationship between the cross-shelf SST difference on the Agulhas Bank and the …
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Detecting long-term trends in water quality parameters using remote sensing techniques
Estuarine systems have undergone extensive alteration as a result of anthropogenic activities. Detecting the magnitude of alteration and anticipating future change are crucial for managing these systems, but challenging because they require long-term records of chemical and biological water …
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Trophic State Monitoring Of Lakes And Reservoirs Using Remote Sensing
… that provide water for critical needs, such as drinking water, agriculture, recreation, fisheries, wildlife, and other uses. However, there is increasing concern that anthropogenic eutrophication threatens the usability of these natural resources. Therefore, this research investigates these …
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On the subtropical front in the South Atlantic Ocean
The region surrounding the Tristan da Cunha Archipelago has received little attention to date due to its remote location. An extensive revision of previous literature covers the majority of oceanographic research undertaken in the region of interest. New satellite derived oceanographic data sets …
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Analysis of water volume change of the lakes and reservoirs in the Mississippi River basin using Landsat imagery and satellite altimetry
In recent years, the demand for freshwater has been steadily increasing owing to population growth and economic expansion. Surface waters such as lakes and reservoirs function as a dominant factor in mankind's freshwater provision. Analysis of changes in their water storage is consequently vital …
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Interannual variability in Indian Ocean surface waters and tuna-environment relationships : filling the gaps with a coupled bio-physical ocean model
Study of the Indian Ocean has lagged behind that of the Atlantic and Pacific, with large knowledge gaps remaining in our understanding of regional or basin-scale controls on productivity and higher trophic levels. A lack of in situ data, especially for mid and upper trophic-level organisms, has …
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Uncovering the Ground Thermal Regime of Coastal Labrador: The Influential Effects of Snow and Vegetation on Ground Temperatures
… and local scale factors. Snow cover has been linked to differences in ground temperatures over short distances (< 5 m) because of its thermal buffering properties which slows energy exchanges between the ground and atmosphere. Accurate derivation and characterization of the effects of snow …
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Simulation of annual cycles of phytoplankton, zooplankton and nutrients using a mixed layer model coupled with a biological model
In oceanography, the mixed layer refers to the near surface part of the water column where physical and biological variables are distributed quasi homogeneously. Its depth depends on conditions at the air-sea interface (heat and freshwater fluxes, wind stress) and on the characteristics of the flow …
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Quantifying phytoplankton biomass and sediment in river plumes along the Agulhas Bank using remotely sensed data with deep learning techniques
River plumes play a major role in land-sea connectivity by providing essential nutrients, sediment, and organic matter to marine environments, and maintaining ecosystem function and habitat structure. Phytoplankton communities' reliance on riverine nutrient deposition to build up their biomass and …
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Contaminated Sweeping Langmuir Probes on Sounding Rocket Platforms
<p>Sweeping Langmuir Probes (SLPs) are one of the most commonly used probes on sounding rocket missions. They offer measurements of plasma density, electron temperature, and both relative and absolute payload charging. One of the major implementation challenges, however, is contamination on the …
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Vandens lygio vertinimas upėse naudojant palydovinius Copernicus duomenis /
… lakes are important freshwater resources, providing drinking water for many people around the world and are essential for all life forms. Monitoring water parameters in rivers, lakes and other water bodies is difficult due to high costs and low accessibility of sites. Cost-effective remote …
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Armada: A Robust Latency-Sensitive Edge Cloud in Heterogeneous Edge-Dense Environments
Edge computing has enabled a large set of emerging edge applications by exploiting data proximity and offloading latency-sensitive and computation-intensive workloads to nearby edge servers. However, supporting edge application users at scale in wide-area environments poses challenges due to …
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Monitoring of the Interstellar Dust Stream in the Inner Solar System Using Data of Different Spacecraft
Interstellar dust plays a key role in many astrophysical processes. However, until recently, astronomers could infer some properties of interstellar dust only through observations of starlight extinction and infrared emission. Therefore, the in-situ detection of interstellar dust, based on …
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Satellite-based Assessments Of Ocean Acidification For The Hawaiian Islands Region
Ocean acidification (OA) is a growing global environmental concern with impacts affecting regions all over the world, including remote areas such as Hawai‘i. OA is gaining worldwide attention due to environmental impacts including the detrimental effects of OA on coral reefs. Increased …
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Understanding the physical, chemical and biological processes across the subtropical convergence during austral automn
A research survey was conducted, consisting of six transects between 38°- 46°S and 38 - 41°45'E, during the austral autumn of 2007. The aim of the survey was to investigate the physical, chemical and biological dynamics of the Subtropical Convergence (STC), in the SW Indian sector of the Southern …
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