Dissertation/ Thesis
Saharan dust deposition effects on production in the Mediterranean Sea
| العنوان: | Saharan dust deposition effects on production in the Mediterranean Sea |
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| المؤلفون: | Gallisai, Rachelle |
| المساهمون: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Peters, Francesc |
| المصدر: | TDX (Tesis Doctorals en Xarxa) |
| بيانات النشر: | Universitat Politècnica de Catalunya |
| سنة النشر: | 2016 |
| المجموعة: | Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
| مصطلحات موضوعية: | Àrees temàtiques de la UPC::Enginyeria agroalimentària::Ciències de la terra i de la vida::Biologia, Contaminants orgànics de l'aigua, Costes -- Aspectes ambientals |
| جغرافية الموضوع: | east=34.189453125, north=34.41597338448186, name=Mar Mediterrània Oriental, east=18.048010500000032, north=34.5531284, east=6.064453125, north=40.91351257612757, name=Mar Mediterrània Occidental |
| Time: | name=Mar Mediterrània Central |
| الوصف: | The potential capacity of fertilization of surface oceans by atmospheric deposition is of scientific interest. This is especially true in the oligotrophic Mediterranean Sea. Its surface waters are extremely poor in nutrients necessary for plankton growth. At the same time, it borders with the largest and most active desert area in the world and the atmosphere over the basin is subject to frequent injections of mineral dust particles. Moreover, future scenarios foresee increases in the region's aridity, thus increasing the dust load, as well as changes in ocean stratification that will increase the potential impact of dust deposition on surface waters. Thus, it is important to study the links between deposition and plankton stimulation. In this context, the present thesis addresses relationships between desert dust deposition and phytoplankton dynamics in the Mediterranean Sea. It places especial emphasis: (1) on the seasonal and geographical patterns of both dust deposition and chlorophyll variability, (2) on the correlation between dust deposition and chlorophyll concentration, (3) on the analysis of the large deposition events and (4) on the effects on chlorophyll concentration due to very large dust deposition events occurred between 2000 and 2007. Broadly, dust deposition seasonal dynamics shows highest values in late autumn and winter in the Central and Eastern Mediterranean. While, the high dust deposition occurs close to Africa with a decreasing gradient from South to North in the basin. By contrast, the distribution of chlorophyll shows decreasing gradients both from West to East and from North to South. In addition, its broadest variability was found in the Western Mediterranean, coinciding with the highest chlorophyll concentrations on average. Positive correlations between dust deposition and chlorophyll concentration were found in large areas of the Mediterranean Sea, with a clear South to North decreasing gradient in correlation coefficient. This is especially true for the Central and the Eastern ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| وصف الملف: | 114 p.; application/pdf |
| اللغة: | English |
| Relation: | Gallisai, R. Saharan dust deposition effects on production in the Mediterranean Sea. Tesi doctoral, UPC, Departament d'Enginyeria Civil i Ambiental, 2016. DOI 10.5821/dissertation-2117-105829 .; http://hdl.handle.net/2117/105829; http://hdl.handle.net/10803/404092 |
| DOI: | 10.5821/dissertation-2117-105829 |
| الاتاحة: | http://hdl.handle.net/2117/105829 http://hdl.handle.net/10803/404092 https://doi.org/10.5821/dissertation-2117-105829 |
| Rights: | L'accés als continguts d'aquesta tesi queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons: http://creativecommons.org/licenses/by-nc-sa/4.0/ ; http://creativecommons.org/licenses/by-nc-sa/4.0/ ; Open Access |
| رقم الانضمام: | edsbas.EB392BE9 |
| قاعدة البيانات: | BASE |
| DOI: | 10.5821/dissertation-2117-105829 |
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