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Effects of the El Niño / Southern Oscillation on the climate of New Zealand
Brambus, Ondřej ; Huth, Radan (advisor) ; Müller, Miloslav (referee)
The climatic phenomena El Nino, Southern Oscillation (SO), their interaction (ENSO) and effects of ENSO on the climate of New Zealand is investigated in this bachelor's thesis. The thesis is divided into three parts. The first one (chapter 3) explains the terminology, general connections and conditions favorable for origination of an ENSO event. The second part (chapter 4) summarizes the main research related to ENSO effects on the climate of New Zealand. In this part not only meteorological and climatological studies are mentioned, but also hydrological or dendrochronological studies. The last part (chapter 5) is based on my research which examines influences in SOI (Southern Oscillation Index) changes to temperature and precipitation variables in New Zealand. During El Nino events the yearly temperature amplitude in Northern part of North Island of New Zealand tends to be bigger than the amplitude during La Nina events. This conclusion is based on correlation analysis between SOI and temperature datasets. Impact of SOI changes on precipitation variability was not confirmed.
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The analysis of glacial retreat of selected mountain regions of New Zealand and natural hazards from GLOFs
Brambus, Ondřej ; Vilímek, Vít (advisor) ; Šobr, Miroslav (referee)
This thesis analyses the glacier fluctuations in New Zealand since late Pliocen until today (2017) and evaluates GLOFs (Glacier Lake Outburst Floods) hazards from all proglacial lakes of New Zealand. Background research of a wide range of scientific sources was used to describe New Zealand glacier fluctuations during the last ~2.6 Ma, uncover local climatic and tectonic specifics, describe uneven behaviour of different glacier types and summarise current knowledge about climatological forcings to New Zealand glaciers. Compared to the timing of glaciations in the Norther Hemisphere, an earlier onset of LGM (Last Glacial Maximum) and LIA (Little Ice Age) was recorded in New Zealand. A dramatic glacier advance of short- to medium-response time glaciers was recorded between 1983 and 1999. This advance was caused by changes of atmospheric and oceanic circulation patterns around New Zealand. A detailed study of the past events revealed that really few events were recorded in New Zealand history. While englacial outburst floods are relatively common from Franz Josef Glacier, no moraine dam rupture and only two GLOFs from a proglacial lake were recorded in New Zealand history. Inventory of proglacial lakes of New Zealand completed from remote sensing data was done to further evaluate the hazards of GLOFs. 25...
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Effects of the El Niño / Southern Oscillation on the climate of New Zealand
Brambus, Ondřej ; Huth, Radan (advisor) ; Müller, Miloslav (referee)
The climatic phenomena El Nino, Southern Oscillation (SO), their interaction (ENSO) and effects of ENSO on the climate of New Zealand is investigated in this bachelor's thesis. The thesis is divided into three parts. The first one (chapter 3) explains the terminology, general connections and conditions favorable for origination of an ENSO event. The second part (chapter 4) summarizes the main research related to ENSO effects on the climate of New Zealand. In this part not only meteorological and climatological studies are mentioned, but also hydrological or dendrochronological studies. The last part (chapter 5) is based on my research which examines influences in SOI (Southern Oscillation Index) changes to temperature and precipitation variables in New Zealand. During El Nino events the yearly temperature amplitude in Northern part of North Island of New Zealand tends to be bigger than the amplitude during La Nina events. This conclusion is based on correlation analysis between SOI and temperature datasets. Impact of SOI changes on precipitation variability was not confirmed.
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