2009 LTER All Scientists Meeting - Paleoclimatology

Using Carbon Isotopes in Tree Rings to Understand Hydrologic Change in South Florida

Carrie Rebenack — Wed, 15 Jul 2009 20:34:53 +0000

Poster Number:

156

Presenter/Primary Author:

Carrie Rebenack

Co-Authors:

William T Anderson

Co-Authors:

Paolo Cherubini

Co-Authors:

Magdalena Nötzli

Carbon isotopes are valuable tools for determining the overall ambient conditions under which trees incorporate seasonal growth, and can act as indicators of periods of environmental stress, including salt water intrusion and droughts. When coupled with traditional dendrochronological analyses, carbon isotopes can potentially relay a high-resolution history of localized hydrologic conditions, and highlight intervals of increased tropical cyclone activity and precipitation frequency as well as long-term trends in freshwater availability.

Student Poster:

Yes

Links between summer winds and paleolimnology in the McMurdo Dry Valleys

Maciek Obryk — Wed, 01 Jul 2009 15:51:35 +0000

Poster Number:

Presenter/Primary Author:

Maciek Obryk

Co-Authors:

Peter T. Doran

The history of perennially ice covered lakes in the McMurdo Dry Valleys (MCM), Antarctica have been extensively studied under the Long Term Ecological Research (LTER) project. The lakes are formed in endorheic basins enclosed by topographic relief or glaciers. Over the past century, the lakes have experienced an overall trend of continuous lake level rise despite decrease in solar radiation (Doran et al, 2002). Variability/increase of lake levels is caused by the sole water source; melt from nearby glaciers during austral summer months.

Student Poster:

Yes

Paleosol Record of Late Quaternary Wind and Water Erosion and Transport Events, Jornada Basin LTER, Southern New Mexico

David Rachal — Sat, 20 Jun 2009 16:40:16 +0000

Poster Number:

Presenter/Primary Author:

David Rachal

Co-Authors:

Monger, H.C.

Co-Authors:

Okin, G.S.

Wind and Water erosion are two dominant, interrelated transport processes that influence the dynamics of arid and semi-arid ecosystems. Complex interactions between wind and water erosion and transport events vary across different landscape units, exhibiting varying degrees of dominance; thereby, affecting soil types, topography, and the movement of soil parent material over spatial and temporal scales. Historic and prehistoric interactions of these erosion events between different landform units are poorly documented in the stratigraphic record.

Student Poster:

Yes