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 11 of 11 for “"solar variability"”.
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Assessing Broadband and Spectral Irradiance Variability for Solar Nowcasting Using Statistical Analysis and Machine Learning
Solar photovoltaic (PV) resources are a key enabling technology in the global energy transition towards a more sustainable future. However, PV generation is highly variable due to the dynamic shading caused by clouds. To mitigate the effects of PV variability on electrical grid stability, grid …
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High resolution palaeoceanography and palaeoclimatology from mid and high latitude Late Cretaceous laminated sediments
… relate to Northern Hemisphere Annular Mode (NAM) variability. Together with the QBO signals, this suggests NAM variability was robust during the Late Cretaceous. Similar frequency peaks occur in the Marca Shale which, supported by several sedimentological lines of evidence, indicates the presence …
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Attribution of stratospheric ozone change and associated climate impacts
… forcings such as greenhouse gases (GHGs) and solar variability. This thesis explores the climate impacts of stratospheric ozone depletion, and how we can attribute, with high confidence, the causes of observed changes in stratospheric ozone. First, the linkages between Antarctic ozone loss and …
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Testing the late-Holocene climate signal from ombrotrophic bogs in southernmost Chile and the Falkland Islands: a multi-proxy, multi-profile and multi-site approach
… test the late-Holocene climate signal related to variability of the SWW. Three sites were investigated: San Juan and Karukinka bog, southernmost Chile and San Carlos, a Sphagnum dominated bog, discovered in the Falkland Islands, to form a regional comparison. A multi-proxy approach was used, …
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Comparison and Investigation of Solar Spectral Irradiance with Solar Aspect Monitor
… thermosphere is derived. The uniquely stable solar activity during 2010 allows the local time variation of NO to be observed with limited influence of solar variability. The comparison with a 1D model shows good agreement at altitude above 120 km, suggesting that most of the local time …
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Setting the Holocene clock using varved lake sediments in Sweden
… of cosmogenic nuclides in combination with solar variability. The “8.2 ka cold event” was recorded as a c. 300-year long period of distinctly colder climate conditions centred at c. 7800 cal. BP in the two varved lake sediment sequences in N Sweden. Pollen influx rates indicate that the …
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Imaging the sun with the Drao synthesis telescope
… algorithms were written to produce solar images. To reduce the solar signals to an acceptable level for the telescope electronics, 20dB attenuators were introduced in the 1420 MHz receivers. The tracking and fringe-controller software was modified to allow for the motion of the Sun …
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Mid- to Late Holocene flood reconstruction from two varved sediment profiles of pre-alpine Lake Ammersee (Southern Germany)
… understanding past, present, and future flood variability. Successively enhanced radiative forcing under global warming enhances atmospheric water-holding capacity and is expected to increase the likelihood of strong floods. In addition, natural climate variability affects the frequency and …
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Alternative methods for mitigating natural photovoltaic variability: dynamic HVAC load compensation and curtailed PV power
… resources onto the electric grid increases variability and decreases grid stability. Energy storage can help mitigate some of these effects, but conventional energy storage such as batteries is typically expensive and has other disadvantages such as round trip inefficiency and limited …