|Funding for:||UK Students, EU Students|
|Funding amount:||NERC GW4+ funded studentship available for September 2022 entry. For eligible students, the studentship will provide funding of fees and a stipend which is currently £15,609 per annum for 2022-23.|
|Placed On:||26th October 2021|
|Closes:||10th January 2022|
Atmospheric particles (aerosols) are key to the Earth’s climate and affect air quality. Ammonia (NH3) is one of the principal precursor gases to aerosols (forming particulate ammonium, NH4+) and the primary base in the atmosphere, neutralising acids and facilitating new particle formation. Over the last few decades, pollution regulations (e.g. Clean Air Acts) have significantly reduced the emissions of acidic aerosol precursors in Europe and North America, including sulphur and nitrogen oxides emitted from fossil fuel combustion. However, NH3 emissions, driven largely by agriculture, have hardly decreased. This has resulted in long-term changes in aerosol pH and chemistry that are not well understood. Additionally, we lack understanding of natural NH3 sources. Oceanic NH4+ may be a key source of NH3 to the marine atmosphere, depending on biogeochemistry, water temperature and water pH. Estimates of air-sea NH3 flux on a regional/global scale are severely hampered by a) a paucity of marine atmospheric NH3 observations, and b) a lack of mechanistic studies of air-water NH3 exchange processes. As a result, NH3 is not well represented in global climate models and its impact is poorly constrained or neglected.
It is envisaged that this PhD project will combine long-term ambient observations, laboratory experiments, and an Earth System Model to significantly improve our understandings in atmospheric NH3 cycling, oceanic NH3 emissions, and the impact of NH3 on aerosols. The student is encouraged to define the proportional focus of the PhD. Some examples of research questions may be:
marine Atlantic, mainland Europe, Arctic) and how do they vary seasonally?
temperature and pH) and is the ocean a large source of NH3 to the marine atmosphere?
The student will receive project specific training in topics such as air-sea exchange, ocean biogeochemistry, and atmospheric chemistry. The student will also be trained to operate state-of-the-art instrumentation (PML), perform quantitative data analysis, and develop/code numerical models (UoE). The student will join an active postgraduate cohort at PML and will also have access to excellent training opportunities in a range of academic skills including scientific writing, presentation and communication, statistics through the Doctor Training Programme.
For eligible successful applicants, the studentships comprises:
Suited for someone with a passion for environmental research with an aptitude to adapt/operate scientific instrumentation and have interests in quantitative data analysis/numerical modelling. Applicants should be degree-level qualified in Environmental, Chemical, Marine or Atmospheric Sciences; those with other numerate degrees (e.g. Physics, Engineering, Mathematics) are also encouraged to apply.
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