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4. Report of Students' Activity

Author

SUGIMOTO, M., OGATA, E., KAMEI, C., SANKODA, H., and MATSUMOTO, T.

Abstract

スーパーグローバルハイスクール（SGH）の取り組み Practices of Super Global High School (SGH) Programs

Published
2019

22. Convergence in Nitrogen Deposition and Cryptic Isotopic Variation Across Urban and Agricultural Valleys in Northern Utah

Author

Hall, Steven J, Ogata, E. M., Weintraub, Samantha R, Baker, Michelle A., Ehleringer, James R, Czimczik, C I, Bowling, David R, and American Geophysical Union

Subjects
inorganic chemicals, Biology, land use, nitrogen deposition, nitrogen isotope, PM2.5, agriculture, urban
Abstract

The extent to which atmospheric nitrogen (N) deposition reflects land use differences and biogenic versus fossil fuel reactive N sources remains unclear yet represents a critical uncertainty in ecosystem N budgets. We compared N concentrations and isotopes in precipitation-event bulk (wet + dry) deposition across nearby valleys in northern Utah with contrasting land use (highly urban versus intensive agriculture/low-density urban). We predicted greater nitrate (NO3−) versus ammonium (NH4+) and higher δ15N of NO3− and NH4+ in urban valley sites. Contrary to expectations, annual N deposition (3.5–5.1 kg N ha−1 yr−1) and inorganic N concentrations were similar within and between valleys. Significant summertime decreases in δ15N of NO3− possibly reflected increasing biogenic emissions in the agricultural valley. Organic N was a relatively minor component of deposition (~13%). Nearby paired wildland sites had similar bulk deposition N concentrations as the urban and agricultural sites. Weighted bulk deposition δ15N was similar to natural ecosystems (−0.6 ± 0.7‰). Fine atmospheric particulate matter (PM2.5) had consistently high values of bulk δ15N (15.6 ± 1.4‰), δ15N in NH4+ (22.5 ± 1.6‰), and NO3− (8.8 ± 0.7‰), consistent with equilibrium fractionation with gaseous species. The δ15N in bulk deposition NH4+ varied by more than 40‰, and spatial variation in δ15N within storms exceeded 10‰. Sporadically high values of δ15N were thus consistent with increased particulate N contributions as well as potential N source variation. Despite large differences in reactive N sources, urban and agricultural landscapes are not always strongly reflected in the composition and fluxes of local N deposition—an important consideration for regional-scale ecosystem models.

Published
2016

29. Anatomy of a patient safety event: a pediatric patient safety taxonomy

Author

Woods, D. M., Ogata, E. S., Lannon, C., Johnson, J., Thomas, E. J., Mehra, M., and Holl, J. L.

Abstract

Background: Idiosyncratic terminology and frameworks in the study of patient safety have been tolerated but are increasingly problematic. Agreement on standard language and frameworks is needed for optimal improvement and dissemination of knowledge about patient safety.

Published
2005
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47. Differences in bone and vitamin D metabolism between primary hyperparathyroidism and malignancy-associated hypercalcemia.

Author

Nakayama, K, primary, Fukumoto, S, additional, Takeda, S, additional, Takeuchi, Y, additional, Ishikawa, T, additional, Miura, M, additional, Hata, K, additional, Hane, M, additional, Tamura, Y, additional, Tanaka, Y, additional, Kitaoka, M, additional, Obara, T, additional, Ogata, E, additional, and Matsumoto, T, additional

Published
1996
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