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Lipidomic and Genomic Investigation of Mahoney Lake, B.C.
(2014-02-25)
Photic-zone euxinia (PZE) is associated with several times in Earth's history including Phanerozoic extinction events and long parts of the Proterozoic. One of the best modern analogues for extreme PZE is Mahoney Lake in ...
Quantifying Methane Emissions Using Satellite Observations
(2014-02-25)
Methane is the second most influential anthropogenic greenhouse gas. There are large uncertainties in the magnitudes and trends of methane emissions from different source types and source regions. Satellite observations ...
On Sea Level - Ice Sheet Interactions
(2014-02-25)
This thesis focuses on the physics of static sea-level changes following variations in the distribution of grounded ice and the influence of these changes on the stability and dynamics of marine ice sheets. Gravitational, ...
Testing and Improving ENSO Models by Process Using Transfer Functions
(Wiley-Blackwell, 2010)
Some key elements of ENSO are not consistently well captured in GCMs. However, modifying the wrong parameters may lead to the right result for the wrong reason. We introduce “transfer functions” to quantify the input/ ...
Isoprene Emissions in Africa Inferred from OMI Observations of Formaldehyde Columns
(European Geosciences Union, 2012)
We use 2005–2009 satellite observations of formaldehyde (HCHO) columns from the OMI instrument to infer biogenic isoprene emissions at monthly 1 × 1° resolution over the African continent. Our work includes new approaches ...
The Effect of Milankovitch Variations in Insolation on Equatorial Seasonality
(American Meteorological Society, 2010)
Although the sun crosses the equator 2 times per year at the equinoxes, at times in the past the equatorial insolation has had only one maximum and one minimum throughout the seasonal cycle because of Milankovitch orbital ...
Upper-Ocean Singular Vectors of the North Atlantic Climate with Implications for Linear Predictability and Variability
(Wiley-Blackwell, 2012)
The limits of predictability of the meridional overturning circulation (MOC) and upper-ocean temperatures due to errors in ocean initial conditions and model parametrizations are investigated in an idealized configuration ...
Toward an improved understanding of the global biogeochemical cycle of mercury
(2014-06-06)
Mercury (Hg) is a potent neurotoxin, has both natural and anthropogenic sources to the environment, and is globally dispersed. Humans have been using Hg since antiquity and continue its use in large quantities, mobilizing ...
Interaction and Variability of Ice Streams under a Triple-Valued Sliding Law and Non-Newtonian Rheology
(Wiley-Blackwell, 2011)
Ice streams are regions of fast flowing glacier ice that transport a significant portion of the total ice flux from present ice sheets. The flow pattern of ice streams can vary both temporally and spatially. In particular, ...
The Role of Ocean Dynamics in the Optimal Growth of Tropical SST Anomalies
(American Meteorological Society, 2010)
The role of ocean dynamics in optimally exciting interannual variability of tropical sea surface temperature (SST) anomalies is investigated using an idealized-geometry ocean general circulation model. Initial temperature ...