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SESE graduate student Marisol Juarez Rivera describes her poster, “Is oxygen supersaturation in Tempe Town Lake mainly driven by abiotic processes?”

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CAP and Sevilleta students at South Mountain Preserve, with the city of Phoenix in the background.

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Figure 4.  The Arctic is warming twice as fast as the rest of the planet. 

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Figure 3. Soil waters had to be filtered in a oxygen-free glove bag back in the lab at Toolik Field Station to avoid oxidation of reduced iron before the start of experiments.

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Researchers at Toolik Lake

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Figure 1. Red-orange oxidized iron precipitates across the arctic landscapes.

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Fig.4 Karla takes a traditional bulk density sample at 100 cm.

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Fig.4 Karla takes a traditional bulk density sample at 100 cm.

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Fig.3 Chris So separates large rocks from soil and root material.

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Fig.2 Soil profiles from three different watersheds with increasing rock content from 15% to >35% from left to right.