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Brigham, Lawson Walter. "Sea ice variability in Russian Arctic coastal seas : influences on the northern sea route". Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621873.
Pełny tekst źródłaDamer, Mouminat. "From Syrian Sea to Shining Sea". Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10751850.
Pełny tekst źródłaFrom Syrian Sea to Shining Sea is a collection of poetry that reflects the lives of Arab-Americans. Whether they may be first generation, Muslim, or immigrants, there is a piece within their self that reflects a longing for the homeland, ties to the motherland, and struggles that arose as a result of the Syrian Civil War. As a first-generation, Arab-American, Muslim woman I wrote these poems through the raw lens that is my experience.
Babb, David. "Sea ice motion within the Beaufort Sea". American Geophysical Union, 2013. http://hdl.handle.net/1993/23694.
Pełny tekst źródłaWilkinson, Jeremy. "Sea ice, convection and the Greenland Sea". Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/25132/.
Pełny tekst źródłaPettenuzzo, Daniele <1977>. "Sea Surface Temperature variations and air-sea physics parametrizations in the Mediterranean Sea". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2867/1/Pettenuzzo_Daniele_tesi.pdf.
Pełny tekst źródłaPettenuzzo, Daniele <1977>. "Sea Surface Temperature variations and air-sea physics parametrizations in the Mediterranean Sea". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2867/.
Pełny tekst źródłaHui, Tabitha Cheng Yee. "Steller sea lions and fisheries : competition at sea?" Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/32588.
Pełny tekst źródłaVon, Eye Maxine Jutta Erika. "Sea ice and convection in the Greenland Sea". Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648527.
Pełny tekst źródłaBonaduce, Antonio <1980>. "Sea-Level climate variability in the Mediterranean Sea". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4645/1/Bonaduce_Antonio_tesi.pdf.
Pełny tekst źródłaBonaduce, Antonio <1980>. "Sea-Level climate variability in the Mediterranean Sea". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4645/.
Pełny tekst źródłaBianchi, Alejandro. "Sea-air CO2 fluxes in the Patagonia sea". Paris 6, 2010. http://www.theses.fr/2010PA066613.
Pełny tekst źródłaMiller, Melissa Ann. "Characterization and epidemiologic investigation of apicomplexan parasites associated with meningoencephalitis in southern sea otters (Enhydra lutris nereis) and Pacific harbor seals (Phoca vitulina richardsi) /". Available via Proquest Digital Dissertations. Restricted to UC campuses, 2002. http://bibpurl.oclc.org/web/21243.
Pełny tekst źródłaHoskins, Robyn. "Sea Stories". ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2330.
Pełny tekst źródłaVice, President Research Office of the. "Sea Change". Office of the Vice President Research, The University of British Columbia, 2009. http://hdl.handle.net/2429/9510.
Pełny tekst źródłaKuninaka, Akira. "Air-sea interactions and water mass structure of the East China Sea and Yellow Sea". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA345980.
Pełny tekst źródła"March 1998." Thesis advisor(s): Peter C. Chu, Robert H. Bourke. Includes bibliographical references (p. 61-62). Also available online.
Schulz, Eric Werner mathematics UNSW. "Air-sea flux parameterisations in a shallow tropical sea". Awarded by:University of New South Wales. mathematics, 2002. http://handle.unsw.edu.au/1959.4/18659.
Pełny tekst źródłaElse, Brent. "Air-sea CO2 cycling in the southeastern Beaufort Sea". American Geophysical Union, 2011. http://hdl.handle.net/1993/8905.
Pełny tekst źródłaBramson, Laura S. "Air-sea interactions and deep convection in the Labrador Sea". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA342378.
Pełny tekst źródła"December 1997." Thesis advisor(s): Peter Guest, Roland Garwood. Includes bibliographical references (p. 73-74). Also available online.
Moreton, Steven Grahame. "Quaternary tephrochronology of the Scotia Sea and Bellingshausen Sea, Antarctica". Thesis, University of Gloucestershire, 1999. http://eprints.glos.ac.uk/4865/.
Pełny tekst źródłaLea, Daniel James. "Joint assimilation of sea surface temperature and sea surface height". Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393382.
Pełny tekst źródłaHuddleston, M. R. "Modelling the sea ice thickness distribution in the Greenland Sea". Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604716.
Pełny tekst źródłaSiddall, Mark. "Paleo-circulation of the Red Sea and global sea level". Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396754.
Pełny tekst źródłaHentati-Sundberg, Jonas. "SEA CHANGE : Social-ecological co-evolution in Baltic Sea fisheries". Doctoral thesis, Stockholms universitet, Stockholm Resilience Centre, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-122372.
Pełny tekst źródłaAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 5: Manuscript.
Stampe, Elin. "Sonar Sea : The acoustic experience of the Baltic Sea dynamics". Thesis, Konstfack, Inredningsarkitektur & Möbeldesign, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7830.
Pełny tekst źródłaRoy, Indrani. "Solar signals in sea level pressure and sea surface temperature". Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6038.
Pełny tekst źródłaGutiérrez-Loza, Lucía. "Mechanisms controlling air-sea gas exchange in the Baltic Sea". Licentiate thesis, Uppsala universitet, Luft-, vatten- och landskapslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-409744.
Pełny tekst źródłaThunblom, Viktor, i Robert Nyberg. "CLEAN SEA : ALGSKÖRDNINGSMASKIN". Thesis, University of Kalmar, Kalmar Maritime Academy, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-2505.
Pełny tekst źródłaSmith, Marian Brunn. "A Fugitive Sea". VCU Scholars Compass, 2007. http://hdl.handle.net/10156/1952.
Pełny tekst źródłaHart, Chase M. "On sea-goats". Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1211390464/.
Pełny tekst źródłaGray, J. M. N. T. "Sea ice dynamics". Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240183.
Pełny tekst źródłaVan, de Noort Robert. "North Sea archaeologies". Thesis, University of Exeter, 2011. http://hdl.handle.net/10036/3312.
Pełny tekst źródłaJakub, Lucy(Lucy Marita). "Sea of change". Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/130207.
Pełny tekst źródłaCataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 13-16).
The Gulf of Maine is warming at a faster rate than 99.9 percent of the world ocean, a trend with uncertain implications for the last great maritime fishery: American lobster. Every year, fishermen, scientists, and managers wait to see if the fishery reverses its fantastic growth, which has been a salutary effect of climate change over the past three decades. The gulf has as many horizons as it has islands, and nobody knows the whole thing. Like the story of the blind men and the elephant, every person you ask, even the most expert, will describe a different gulf to you, and a different crisis. What's clear is that the ecosystems of the region have been shaped by many different pressures: domesticated by management, depleted by overfishing, shuffled by natural climatic cycles. The future of the gulf will depend not just on the trajectory of ocean warming, but on whether people can rethink the way we use the environment, and adapt to a changing world.
by Lucy Jakub.
S.M.
S.M. Massachusetts Institute of Technology, Department of Humanities
Oyedokun, Titus Oluwale. "Sea clutter simulation". Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/14557.
Pełny tekst źródłaThis dissertation presents the results of a study, the aim of which was the prediction of sea clutter characteristics including the temporal properties of the return signals as observed by a maritime surveillance radar system. The compound K distribution model used to generate clutter amplitude statistic enables the simulation of sea clutter with a good level of approximation to real radar data and this model forms the basis for the simulation of sea clutter amplitude statistic in this dissertation. Using this distribution, a sea clutter simulator is designed to generate correlated K distributed random variates from a predefined correlation function using the method by Ward and Tough [1 ]. Results from the sea clutter simulator shows that the simulated correlated random variates fit the theoretical K distribution PDF. Experimental sea clutter measurements were carried out using an experimental netted radar system. This was done at Scarborough Cape Town. Result obtained from the monostatic node is presented. This shows the amplitude statistics of the clutter as well as the temporal variation of the Doppler spectrum. Conclusions are drawn based on this results and suggestions made for further work.
Chen, Hao. "Late Pleistocene palaeoenvironmental reconstruction using sediment cores from the Bohai Sea, the Huanghai Sea and the Arabian Sea". Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/14477.
Pełny tekst źródłaMarchiori, Erica. "Parasitic infections in sea turtles and cetaceans in Mediterranean Sea waters, with a focus on the Adriatic Sea". Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426708.
Pełny tekst źródłaLe infestazioni parassitarie contribuiscono alla mortalità naturale in popolazioni di tartarughe marine e cetacei in tutto il mondo. A prescindere dai diversi fattori dipendenti dall’ospite che possono influenzare l’esito di tali infestazioni, alcuni parassiti, dai protozoi agli elminti, possiedono un alto potenziale patogeno, tale da essere causa primaria di morte. Infestazioni da Trematodi Digenei del sistema cardiocircolatorio (Digenea:Spirorchiidae) sono un’ importante causa di morbidità in popolazioni di tartarughe marine degli oceani Pacifico e Atlantico. Per indagare la presenza e la patologia di questa infestazione nel Mediterraneo, sono stati raccolti dati da 168 tartarughe Caretta caretta spiaggiate lungo la costa adriatica nord occidentale in un periodo di sei anni. L’approccio parassitologico, sia tradizionale che molecolare, e lo studio anatomopatologico hanno rivelato la presenza di uova e adulti di Hapalotrema mistroides e Neospirorchis – Neogen 11 con prevalenze di 15.5% e 6.0% rispettivamente. Sono state riscontrate lesioni lievi, tra cui enterite granulomatosa multifocale e vasculite cronica focale a carico dei grossi vasi. Il sequenziamento dei markers genomici (28S e ITS-2) e l’analisi filogenetica hanno permesso di verificare l’identità dei nostri campioni con quelli isolati in Florida. Analisi genetiche effettuate sugli ospiti hanno portato a concludere che il ciclo vitale di questi parassiti può completarsi all’interno del Mediterraneo. Un nuovo metodo rapido per la quantificazione dell’intensità di infestazione è stato quindi messo a punto. È stata studiata la correlazione tra l’emissione di uova nelle feci e la presenza di uova nei tessuti attraverso l’applicazione di test statistici, che hanno rivelato l’inattendibilità del valore della carica di uova fecali al fine di stimare la gravità dell’infestazione in vivo. Per quanto riguarda i cetacei, la crassicaudosi è una delle più gravi elmintiasi in questi animali ma ciononostante i dati sull’epidemiologia di Crassicauda spp. sono ancora scarsi, a causa delle limitazioni poste dal campionare queste specie ospite e alla difficoltà di ottenere campioni parassitologici integri. La presenza e la patologia della crassicaudosi sono state studiate in balenottere comuni (Balaenoptera physalus) spiaggiate lungo le coste italiane. Gravi lesioni collegate alla presenza di nematodi adulti nel sistema circolatorio e nei reni sono state trovate in cinque animali (5/7), in presenza di insufficienza renale in un caso e arterite dei vasi mesenterici associata alla presenza di larvae migrans di nematodi spiruridi. Gli studi morfologici, comparati con le descrizioni in letteratura, hanno permesso di identificare i parassiti adulti come Crassicauda boopis. Sono state sequenziate le regioni di barcoding sui parassiti adulti e sulle larve e, parallelamente, altri individui di Crassicauda spp., isolati da odontoceti, sono stati studiati morfologicamente e molecolarmente. Un’analisi multigenica sulle regioni barcode ha rivelato che il segmento ITS-2 si è rivelato il più efficiente nella distinzione di specie all’interno del genere Crassicauda. Questa analisi apre nuove questioni riguardo l’identità delle larve migrans e il ciclo vitale di questi nematodi. Durante l’esame parassitologico, elementi immaturi di Pennella spp. sono stati isolati da una balenottera e descritti morfologicamente per la prima volta. Dati molecolari preliminari sono stati ottenuti al fine di chiarire la tassonomia del genere Pennella. Toxoplasma gondii è stato isolato da un altro esemplare, associato a infezione cronica. I dati parassitologici raccolti hanno rivelato l’importanza di un continuo monitoraggio della salute di queste specie che tenga in considerazione il potenziale effetto delle parassitosi sulla mortalità naturale.
Tadross, Mark Alexander. "Microwave remote sensing of young sea ice in the Greenland Sea". Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624765.
Pełny tekst źródłaNelis, Patrick M. "The transfer of radionuclides from sea to land in sea spray". Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/15496.
Pełny tekst źródłaTorres, Parra R. Ricardo. "Sea-level variability in the Caribbean Sea over the last century". Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/367215/.
Pełny tekst źródłaRamos, Manuela Fangueiro. "Sea anemones (Anthozoa: actiniaria) fauna of the North Atlantic deep sea". Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/3495.
Pełny tekst źródłaA dissertação da Tese de Mestrado enquadra-se no âmbito do estudo do material recolhido durnte as expedições realizadas na Planície Abissal de Porcupine e no Talude Noroeste Irlandês. Estas expedições integram, respectivamente, três programas: BENGAL financiado pela UE com o Programa de Tecnologia e Ciência Marinha (MAST III), PROSPEC e CARACOLE coordenados pelo IFREMER. O objectivo deste trabalho centra-se principalmente no estudo da fauna de actiniários recolhidos nas campanhas efectuadas durante a época de 1996 a 2001 (PROSPEC- 96; BENGAL - 97/98; CARACOLE - 2001), e na análise biogeográfica desta fauna profunda do Atlântico Nordeste. Este estudo contribui com informação sobre 1) novos registos e redescrições do material recolhido no Nordeste Atlantico; 2) a variabilidade dos caractéres utilizados para a identificação das espécies, 3) a distribuição geográfica e batimétrica destas espécies, 4) análises da distribuição dentro da área de estudo atendendo às variáveis ambientais disponíveis; 5) actualização de dados taxonómicos e biogeograficos das especies que compõem a fauna do Ártico, o Norte Atlântico (Nordeste e Noroeste Atlântico, Lusitâneo e Mauritâneo) e o Mediterrâneo; e 6) a composição e afinidades faunísticas na comparação com outras áreas biogeográficas do Norte Atlântico. Neste contexto, foi discutida a origem da fauna de anemonas de oceano profundo.
This Master thesis is integrated in the study of the deep-sea fauna collected during expeditions carried out in the Porcupine Abyssal Plain and the Irish North-western Slopes. These campaigns integrate, respectively, three programs: BENGAL sponsored by the Marine Science and Technology Program (MAST III) from the EU, PROSPEC and CARACOLE coordinated by IFREMER. This work focus mainly the study of the actiniarian fauna collected in the mentioned campaigns during the years 1996 to 2001 (PROSPEC-96; BENGAL- 97/98; CARACOLE-2001), and the biogeographical approach of the deep-sea fauna of the Northeast Atlantic. This study contributes with information on: 1) new records and redescriptions of material collected in the Northeast Atlantic; 2) the variability of the used characters for the species identification; 3) the geographic and bathymetric distribution of these species; 4) the distributional analyses in the study area in relation to the environmental variables available; 5) an update of taxonomic and biogeographic data of the Arctic, North Atlantic (Northeast and North-west Atlantic, Lusitanian and Mauritanian) and Mediterranean areas; and 6) the composition and faunistic affinities in comparison to other biogeographical areas of the North Atlantic. In this context, the origin of the North Atlantic deep-sea anemones fauna is discussed.
IFREMER
18.06.05.79.01
Bartolomeu, Ana Sofia Sebastião. "Sea level validation in MSYM model for the South China Sea". Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12010.
Pełny tekst źródłaA região do Mar do Sul da China, e os Estreitos da Malásia e Singapura são caracterizados por um comportamento complexo da maré sob a influência dos Oceanos Pacífico e Índico, mas também devido à batimetria e geografia da região. Enquanto a maré é semidiurna no Estreito da Malásia, esta apresenta um carácter misto e diurno entre o Estreito de Singapura e o Mar do Sul da China. Para além da complexidade da região, esta é também economicamente importante e a sua navegabilidade deve ser garantida. Neste sentido, a Hidromod desenvolveu uma aplicação numérica hidrodinâmica para o Estreito da Malásia (modelo MSYM), a partir do modelo MOHID. O modelo MSYM permite, entre outos parâmetros, reproduzir o nível do mar, que necessitam de ser validados. Para a validação do modelo, as previsões são comparadas com observados (disponíveis), sendo este o principal objetivo deste trabalho. Numa primeira parte, foi feita a validação do nível do mar para seis marégrafos do GLOSS incluídos na região do Mar do Sul da China e Estreitos da Malásia e Singapura. A comparação entre observações e previsões numéricas revelou um coeficiente de correlação superior a 0.95 (considerando todas as estações) e um RMSE centrado próximo dos 10 cm nas estações localizadas no Estreito da Malásia (utilizando o domínio de maior resolução horizontal) e de 15 – 20 cm na costa Este da Malásia. Por outro lado, a região é fortemente influenciada por monções de Nordeste (entre Novembro e Março) e de Sudoeste (entre Maio e Setembro) que, atuando sobre o Mar do Sul da China tendem a gerar anomalias positivas ou negativas da maré no Estreito de Singapura, respetivamente. Para estudar este fenómeno, foi analisado o nível do mar em Tanjong Pagar (no Estreito de Singapura), identificando-se anomalias do nível do mar positivas e negativas. São exemplos o dia 25 de Dezembro, associado a uma forte intensidade do vento de Nordeste (anomalia positiva) e o dia 7 de Fevereiro relacionado com uma variação da direção do vento (anomalia negativa). Ambas as anomalias são da ordem de 30 cm e as discrepâncias entre o nível do mar observado e simulados pelo MSYM correspondem principalmente à maré residual (meteorológica). Por fim, a análise da maré em duas estações localizadas no Estreito da Malásia revelou diferenças significativas entre dados observados e previsões numéricas em maré morta, que estão associadas essencialmente à reprodução da maré astronómica pelo modelo MSYM.
The South China Sea region, and the Malacca and Singapore Straits are known for the complex behavior of their tides, which are under the influence of the Pacific and Indian Oceans, and are modified by the bathymetry and geography of the region. While the tide is semidiurnal in the Malacca Strait, in the Singapore Strait and the South China Sea the tides are mixed and diurnal. In spite of the region’s dynamic complexity, it is an economically important region, and its navigability needs to be assured. As such, Hidromod has developed a hydrodynamical numerical application for the Malacca Strait (the MSYM model) from the MOHID model. The MSYM model calculates, among other parameters, the sea level that needs to be validated. In order to validate the model, the predictions are compared with (available) observations, which is the main goal of this work. In a first part, a validation of the sea level for six GLOSS tide-gauges in the South China Sea region and the Straits of Malacca and Singapore was done. This analysis revealed a correlation coefficient between observations and predictions of over 0.95 (taking every station into account) and a RMSE centered around 10 cm in the stations in the Malacca Strait (using the domain with higher horizontal resolution), and of 15-20 cm in the East coast of Malacca. On the other hand, the region is deeply influenced by Northeast monsoons (between November and March) and by Southwest monsoons (between May and September). These act over the South China Sea and tend to induce positive or negative sea level anomalies in the Singapore Strait. In order to study this phenomenon, the sea level in Tanjong Pagar (in the Singapore Strait) was studied, and the positive and negative anomalies were identified. For example, the 25th of December is linked with a strong northeasterly wind (positive) while in the 7th of February with a shift in the wind direction there is a negative anomaly. Both anomalies are in the order of 30 cm and the differences between the observed and predictions sea levels are mainly due to the residual tide (meteorological). Finally, the tidal analysis in two stations located in the Malacca Strait has revealed significant differences between observed data and simulations, during neap tide, which are mostly associated with the reproduction of the astronomical tide by the MSYM model.
Morrison, Isobel. "Desert To Sea: White Fantasies, Red Rivers, and The Salton Sea". Scholarship @ Claremont, 2017. http://scholarship.claremont.edu/scripps_theses/1070.
Pełny tekst źródłaReddy, Tasha Elise. "Oceanography of the Ross Sea : ocean circulation, sea ice, and phytoplankton /". May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Pełny tekst źródłaAvens, Larisa I. "Homing behavior, navigation, and orientation of juvenile sea turtles". Online version in pdf format, 2003. http://www.sefsc.noaa.gov/PDFdocs/Avens%5FDissertation%5F2003.pdf.
Pełny tekst źródłaCheng, Bin. "On the modelling of sea ice thermodynamics and air-ice coupling in the Bohai Sea and the Baltic Sea". Helsinki : Finnish Institute of Marine Research, 2002. http://ethesis.helsinki.fi/julkaisut/mat/fysik/vk/cheng/.
Pełny tekst źródłaKaczmarska, Anna Izabela. "Seasonal and interannual sea surface height variability in the Nordic Seas". Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/336399/.
Pełny tekst źródłaOwen, Ellie. "The use of fatty acid signature analysis to investigate diets of North Sea seabirds". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=33428.
Pełny tekst źródłaBryan, Kyle A. "Simulation of sea based logistics support of operational maneuver from the sea". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA401221.
Pełny tekst źródłaThesis Advisor(s): Kang, Keebom ; Doerr, Kenneth. "December 2001." Includes bibliographical references (p. 79-80). Also available in print.
Alonso, Arroyo Alberto. "Contributions to land, sea, and sea ice remote sensing using GNSS-reflectometry". Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/404062.
Pełny tekst źródłaAquesta tesi doctoral aprofundeix en el coneixement de les tècniques de teledetecció passives utilitzant senyals emesos pels satèl·lits de navegació (GNSS) amb l'objectiu de recuperar diferents paràmetres geofísics del terreny. La tesi conté dues parts ben diferenciades a banda de la introducció, estat de l'art i conclusions. La primera part analitza la tècnica coneguda com a patró d'interferències, utilitzada prèviament en una altra tesi doctoral, i proposa certes millores per la seva aplicabilitat. En primer lloc es decideix afegir polarització horitzontal a la ja existent polarització vertical, i s'estudia la recuperació d'humitat del sòl utilitzant només polarització horitzontal i combinant les dues polaritzacions per corregir els efectes de la rugositat del terreny. A continuació es demostra que la mesura de desfasament entre els dos patrons d'interferència està directament relacionada amb la humitat del terreny. Es va realitzar una campanya de mesures a Austràlia per provar empíricament tots els desenvolupaments teòrics i algorismes proposats. En segon lloc s'analitza l'aplicabilitat del patró d'interferències en la mesura de l'altura de les onades (SWH) i del nivell del mar (MSSL), tots dos de forma precisa. L'estimació de l'alçada de les onades és un procés totalment nou basat en mesurar el punt on el patró d'interferències perd la coherència. L'estimació del nivell del mar es basa en l'anàlisi espectral del patró d'interferències provant diferents estimadors espectrals. Atès que la tècnica del patró d'interferència està limitada en cobertura per les seves característiques estàtiques, la investigació duta a terme en aquesta tesi doctoral va migrar cap a tècniques GNSS-R escateromètriques. El principal objectiu a assolir va ser el d'augmentar la cobertura dels diferents instruments GNSS-R de mesura. En conseqüència, la segona part d'aquesta tesi analitza l'aplicabilitat d'aquestes tècniques des de diferents plataformes terrestres (mòbils i fixes), aerotransportades i satèl·lit. Les plataformes terrestres fixes han permès derivar algoritmes de recuperació d'humitat i les mòbils estendre la validació d'aquests. Les plataformes aerotransportades s'han utilitzat per mirar l'estadística del camp elèctric reflectit quan la superfície on es reflecteixen els senyals GNSS va variant (terra plana o terra rugosa, i mar). També han servit per desenvolupar diferents algorismes amb l'objectiu de determinar les components coherent i incoherent del senyal reflectit. De la mateixa manera, dades de reflectivitat coherent mesurades des d'aquestes plataformes han estat comparades amb altres tècniques de teledetecció passiva com la radiometria de microones, altament utilitzada en la mesura d'humitat de terreny, i altres sensors òptics, multi-espectrals, i tèrmics. Aquests resultats han permès suggerir la possible sinergia de dades d'ambdues tecnologies. Un algorisme per detectar la presència de gel sobre el mar també ha estat desenvolupat mitjançant l'ús de dades GNSS-R escateromètriques satel·litals de la missió UK TDS-1. Aquest algorisme es basa en mesurar el grau de coherència de la forma d'ona reflectida. Finalment, s'ha realitzat un estudi de l'efecte de la vegetació en els senyals GNSS que la travessen, per tal de poder corregir aquest efecte en els algoritmes de recuperació d'humitat del terreny.
Guo, Larsén Xiaoli. "Air-Sea Exchange of Momentum and Sensible Heat Over the Baltic Sea". Doctoral thesis, Uppsala University, Department of Earth Sciences, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3357.
Pełny tekst źródłaLong term measurements are used to explore the wave impact on the momentum and sensible heat transfer in the marine atmospheric surface layer. This is important in determining the boundary conditions of atmosphere-ocean coupled models of many scales. In those models classical similarity theories developed over land are commonly used, but they have shown to be questionable over sea.
It is found that during pure wind sea conditions, the wind law, which is valid over land, is also valid over the sea. The sea surface roughness resembles that of a solid rigid surface. It scales with the surface elevation and decreases with wave age. When the sea surface is dominated by swell, wave influence is felt through the whole boundary layer. The wind profile is shown to be a function of wave state, and the classical wind law is modified when swell is present. Measurements and a wind over wave coupled model reveal that the momentum exchange depends on a combination of wind and wave condition.
The exchange of sensible heat does not show the similar dependence on the wave state as the momentum. However at strong winds when waves break, the effect of spray becomes significant, increasing the exchange coefficient considerably.
Guo, Larsén Xiaoli. "Air-sea exchange of momentum and sensible heat over the Baltic Sea /". Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://publications.uu.se/theses/91-554-5565-4/.
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