Grain Production from Distichlis Palmeri

Distichlis palmeri is a perennial rhizomous dioecious saltgrass endemic to the often-flooded tidal marshes of the Colorado River delta where water salinities can exceed that of seawater. In its natural habitat, female plants produce a grain that has historical relevance as a wild harvest staple of the Cocopah people. Grain production from plants grown from seed under greenhouse conditions required four years of maturation under paddy type cultivation.

Drought Frequency in Paleoclimate Records and Climate Models

I compare the drought duration in instrumental and paleoclimate records with long simulations from the latest Earth System Models. Instrumental and paleoclimate data indicate that decadal to multidecadal drought can be common around the globe. However, climate model data suggest that models are unable to capture and reproduce long periods of drought. Our findings suggest that the latest Intergovernmental Panel on Climate Change (IPCC AR5) climate models likely underestimate future drought risk.

Seasonality of Groundwater Recharge in the Basin and Range Province, Western North America

Groundwater is an important source of freshwater in semi-arid regions. It is critical to understand the current groundwater recharge regimes in basins throughout western North America. and how they might shift in the face of climate change. Watersheds in the Basin and Range Province are characterized by wet winters and variable summer precipitation determined by the dynamics of the North American Monsoon.

Fences, Ranchers, and Environmentalists

My project, a portion of my dissertation, explores Christo and Jeanne-Claude’s "Running Fence" as a roadmap for new directions in eco-critical studies of American art history. Although Christo and Jeanne-Claude’s "Running Fence" is often treated as a temporary land art installation, it needs to be considered in a broader framework.

Temperature-driven Seedling Drought Response in a Community of Sonoran Desert Winter Annual Plants

Drought-induced desiccation is the primary cause of mortality in this system of annual plants, and seedlings are especially vulnerable. A seedling’s environment is largely determined by germination timing, yet little is known about how germination cues match up to subsequent environments for growth and survival. To make this connection, we examined the effect of drought on seedling establishment in different temporal environments.

Decomposition Rates Along a Hydrological Gradient in the San Pedro Riparian National Conservation Area

Nearly 90% of net primary productivity enters the soil system where it decomposes. At broad scales, decomposition rates are typically represented as a function of annual mean temperature and moisture. The relationship at local scales, however, becomes more complex and disentangling the factors that drive decomposition (soil biology, plant chemistry) remains challenging.

Projections of Extreme Sea Level Rise Events along the Northeast Coast of North America

Authors: Paul Goddard and Jianjun Yin By analyzing long-term tide gauge (TG) records, we find an extreme sea level rise (SLR) event during 2009-10 along the Northeast Coast of North America. Within a two-year period, the coastal sea level north of New York City (NYC) jumped by up to 128 mm. Despite significant year-to-year fluctuation, this magnitude of SLR is unprecedented during the entire history of the TG records.

Northwest Migration

I am working on a collection of essays on American enclave (gated, secluded, intentional) communities and their relationships to a continually dissatisfying and unattainable desire for the American Dream.

Support for Linking Local Users and Multi-tiered Institutions into the IWRM Process: Water Insecurity in Tajikistan and Mexico

Participation amongst stakeholders and tiered institutions in collaborative policy making process is essential to IWRM’s stated goals of securing water for people in a manner that reconciles economic efficiency, social equity and environmental sustainability.

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