Tristan McKenzie

Tristan McKenzie
University of Gothenburg | GU · Department of Marine Sciences

PhD Geology & Geophysics

About

21
Publications
1,724
Reads
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110
Citations
Citations since 2017
18 Research Items
110 Citations
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Introduction
I recently completed my PhD in Geology and Geophysics at the University of Hawaiʻi at Mānoa focusing on the intersection of coastal hydrology, submarine groundwater discharge, water contamination, and sea-level rise. I am particularly interested in the combining field-based geochemical techniques and machine learning. I am currently funded by a Marie Skłodowska Curie postdoctoral fellowship working at the University of Gothenburg, Sweden.
Additional affiliations
June 2018 - present
University of Hawaiʻi at Mānoa
Position
  • Research Assistant
Description
  • Hawaiʻi Data Science Institute
August 2016 - June 2018
University of Hawaiʻi at Mānoa
Position
  • Research Assistant
Description
  • University of Hawaiʻi Sea Grant
March 2015 - May 2016
University of Hawaiʻi at Mānoa
Position
  • Undergraduate Research Assistant
Education
August 2018 - May 2021
University of Hawaiʻi at Mānoa
Field of study
  • Coastal Hydrology
August 2016 - July 2018
University of Hawaiʻi at Mānoa
Field of study
  • Coastal Hydrology
June 2014 - May 2016
University of Hawaiʻi at Mānoa
Field of study
  • Geology and Geophysics

Publications

Publications (21)
Article
Several reactors at the Fukushima Dai-ichi Nuclear Power Plant suffered damage on March 11, 2011, resulting in the release of radiocesium ((134)Cs and (137)Cs), as well as other radionuclides, into the atmosphere. A week later, these isotopes were detected in aerosols over the state of Hawai'i and in milk samples analyzed on the island of Hawai'i....
Article
Full-text available
Groundwater-surface water interactions drive water quality in both streams and the coastal ocean, where groundwater discharge occurs in streams as baseflow and along the coastline as submarine groundwater discharge (SGD). Groundwater contributions to streams and to the coastal ocean were quantified in three urban streams in Kāne'ohe Watershed, Hawa...
Article
Full-text available
Submarine groundwater discharge (SGD) is rarely considered as a pathway for contaminants of emerging concern (CECs). Here, we investigated SGD as a source of CECs in Sydney Harbour, Australia. CEC detection frequencies based on presence/absence of a specific compound were >90% for caffeine, carbamazepine, and dioxins, and overall ranged from 25 to...
Article
Full-text available
Sea‐level rise (SLR) is expected to compromise coastal wastewater infrastructure (WIS) via groundwater inundation (GWI). We conducted a field‐based study in urban Honolulu, Hawai'i using spring tides as a proxy for future sea levels to quantify the hydrologic connection of WIS. This study focused on two possible pathways: (1) direct GWI of WIS and...
Article
Full-text available
It is relatively well accepted that climate change can affect human pathogenic diseases; however, the full extent of this risk remains poorly quantified. Here we carried out a systematic search for empirical examples about the impacts of ten climatic hazards sensitive to greenhouse gas (GHG) emissions on each known human pathogenic disease. We foun...
Article
Full-text available
Groundwater is a vital resource for humans and groundwater dependent ecosystems. Coastal aquifers and submarine groundwater discharge (SGD), both influenced by terrestrial and marine forces, are increasingly affected by climate variations and sea-level rise. Despite this, coastal groundwater resources and discharge are frequently poorly constrained...
Presentation
Climate change-driven sea level rise (SLR) is increasingly stressing and decreasing the efficacy of coastal wastewater infrastructure due to its vulnerability to flooding by tidal groundwater inundation. This can result in flooded sewer mains and onsite sewage disposal systems (OSDS), lowering the efficiency of treatment and increasing the potentia...
Article
Full-text available
International research is necessary in aquatic sciences because water moves across borders. Historically, international collaborations have been useful in conducting oceanographic research programs, which span large distances and require several funding sources. Although valuable, international research can have unforeseen challenges to the unprepa...
Presentation
Dense coastal population, permeable geology, and extreme tides on Pacific Islands result in anthropogenically-derived pollution entering groundwater, which then can be transported to streams and the coastal ocean. This study takes a novel approach by looking at groundwater baseflow and submarine groundwater discharge (SGD) as a continuous vector fo...
Presentation
Pacific islands water resources are particularly vulnerable to contamination because the islands typically have small watersheds, permeable geologic substrates, and short subsurface pollutant residence times, all resulting in minimal natural remediation. We have applied a multi-tracer source-tracking approach in Kāneʻohe Bay watershed, located on t...
Presentation
Reactors at the Fukushima Dai-ichi Nuclear Power Plant suffered damage in March 2011, resulting in the release of radiocesium (134Cs and 137Cs) into the atmosphere. A week later, Fukushima-derived cesium was detected in aerosols over the state of Hawaiʻi as well as in milk samples analyzed from the island of Hawaiʻi. This study estimated the magnit...
Poster
We have applied a novel approach using radon, δ15N and δ18O values of nitrate, and contaminants of emerging concern (CECs) to identify groundwater pathways of anthropogenic contaminants. This approach was applied in Kāneʻohe watershed, located on the windward side of Oʻahu, which has been subject to persistent near shore water pollution. Previous r...
Poster
Kāneʻohe Bay, a reef-dominated embayment located on the windward side of Oʻahu, has been subject to persistent water pollution issues. Recent water quality issues in northwestern Kāneʻohe Bay have emerged forcing the Hawaiʻi State Department of Health to close beaches near Kahaluʻu Lagoon. Contamination transport from the Kahaluʻu watershed is susp...
Poster
Groundwater contribution to streams and estuaries has been suggested to significantly affect water quality on Pacific islands. A stream complex and coastline in Kahaluu, located on the windward side of Oahu, Hawaii, was studied to demonstrate the importance of groundwater in delivering nutrients, dissolved inorganic carbon, and anthropogenic pollut...
Conference Paper
On March 11, 2011, several reactors at the Fukushima Dai-ichi Nuclear Power Plant suffered damage and released the radioisotopes 131I, 134Cs, and 137Cs into the atmosphere. A week later, these isotopes were detected in aerosols over the state of Hawaiʻi and in milk samples analyzed from the island of Hawaiʻi. This study estimated the magnitude of c...
Poster
On March 11, 2011, several reactors at the Fukushima Dai-ichi Nuclear Power Plant suffered damage and released the radioisotopes iodine-131, cesium-134, and cesium-137 into the atmosphere. A week later, these isotopes were detected in aerosols over the state of Hawaii and in milk samples analyzed from the Big Island. Because the detected levels wer...
Article
Full-text available
In March of 2011, the radioisotopes cesium-134 (134Cs) and cesium-137 (137Cs) were released into the atmosphere from the damaged Fukushima Dai-ichi Nuclear Power Plant. This study estimated the magnitude of atmospheric fallout of these isotopes on Oʻahu and Hawaiʻi, and examined the patterns of cesium wet deposition with precipitation in mushroom s...

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Cited By

Projects

Projects (4)
Project
Conducting a geochemical study focusing on groundwater inundation caused by increasing sea-levels on the island of Oʻahu, Hawaiʻi.
Project
Researching ways to improve wastewater source-tracking from OSDS using a suite geochemical tracers with applications to several locations on the island of Oʻahu, Hawaiʻi.
Archived project
We are quantifying ground versus surface water fluxes and their associated geochemical components, including nutrients, CECs, and trace metals (among others) in a polluted stream complex in order to asses how the groundwater effects water quality in streams as well as along a tropical coastline.