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Home > Tenured Faculties > Nakashima Yoshihiro

Tenured Faculties

Nakashima Yoshihiro

Affiliation Institute of Agriculture
Division Division of Environmental Science on Biosphere
Research field Field of Environmental Chemistry
Keyword(S) atmospheric chemistry in nighttime, nitrogen oxides, molecular spectroscopy
Research experience

・Apr. 2005-Mar. 2007: Postdoctral fellow, National Institute for Environmental Studies (NIES)
・Apr. 2007-Sep. 2008: Research Assisitant, Tokyo Metropolitan University
・Oct. 2008-Sep. 2012: Research Associate, Tokyo Metropolitan University
・Oct. 2012-Sep. 2017: Assistant Professor, Tokyo University of Agriculture and Technology
・Oct. 2017-present Associate Professor(Tenured), Tokyo University of Agriculture and Technology

Educational background

・1999: Graduated Faculty of Science, Kyushu University
・2001: Completed Graduate School of Science (Master course), Kyushu University
・2005: Completed Graduate School of Science (Doctoral course), Kyushu University

Selected papers and publications

* The latest information is shown at the member's website.
(At 2013)
・Yoshihiro Nakashima, Shungo Kato, Jim Greenberg, Peter Harley, Thomas Karl, Andrew Turnipseed, Eric Apel, Alex Guenther, Jim Smith, Yoshizumi Kajii, "Total OH reactivity measurements in ambient air in a southern Rocky Mountain ponderosa pine forest during BEACHON-SRM08 summer campaign", Atmospheric Environment, accepted.
・S. Kim, G. M. Wolfe, L. Mauldin, C. Cantrell, A. Guenther, T. Karl, A. Turnipseed, J. Greenberg, S. R. Hall, K. Ullmann, E. Apel, R. Hornbrook, Y. Kajii, Y. Nakashima, F. N. Keutsch, J. P. DiGangi, S. B. Henry, L. Kaser, R. Schnitzhofer, M. Graus, A. Hansel, W. Zheng, and F. F. Flocke, "Evaluation of HOx sources and cycling using measurement-constrained model calculations in a 2-methyl-3-butene-2-ol (MBO) and monoterpene (MT) dominated ecosystem", Atmos. Chem. Phys., 13, 2031-2044, (2013)
・Y. Nakashima, H. Tsurumaru, T. Imamura, I. Bejan, J. C. Wenger, Y. Kajii, "Total OH reactivity measurements in laboratory studies of the photooxidation of isoprene", Atmospheric Environment, 62, 243-247, (2012)
・J. P. DiGangi, S. B. Henry, A. Kammrath, E. S. Boyle, L. Kaser, R. Schnitzhofer, M. Graus, A. Turnipseed, J-H. Park, R. J. Weber, R. S. Hornbrook, C. A. Cantrell, R. L. Maudlin III, S. Kim, Y. Nakashima, G. M. Wolfe, Y. Kajii, E.C. Apel, A. H. Goldstein, A. Guenther, T. Karl, A. Hansel, and F. N. Keutsch, "Observations of glyoxal and formaldehyde as metrics for the anthropogenic impact on rural photochemistry", Atmos. Chem. Phys., 12, 9529-9543, (2012)
・A. Yoshino, Y. Nakashima, K. Miyazaki, S. Kato, J. Suthawaree, N. Shimo, S. Matsunaga, S. Chatani, E. Apel, J. Greenberg, A. Guenther, H. Ueno, H. Sasaki, J. Hoshi, H. Yokota, K. Ishii, Y. Kajii, "Study of air quality in urban central Tokyo - Comprehensive observations of total OH reactivity and reactive trace species", Atmospheric Environment, 49, 51-59, (2012)
・Y. Nakashima, N. Kamei, S. Kobayashi, Y. Kajii, "Total OH reactivity and VOC analyses for gasoline vehicular exhaust with a chassis dynamometer", Atmospheric Environment, 44, (2010), 468-475

Research Description

Nitrogen oxides (NOx) are one of the important species in troposphere and it acts as a precursor of the formation of photochemical oxidant. The increment of the concentration of oxidant is one of the important issues. To reduce the concentration of oxidant, it is essential to know the emission and loss amounts of NOx precisely and mechanism of the chemical reaction related with NOx. There are many reports for the output of NOx, while the loss amount of NOx has been unknown, especially loss process of NOx in nighttime. The main loss process in nighttime is (1) reaction of NO3 with volatile organic compounds (VOCs) and (2) heterogeneous reaction of N2O5 with aerosol. Loss amount of NOx by these reactions depend on the property of VOCs, diameter and component of aerosol, seasonal and geophysical conditions.
My research is the measurements of NO3 and N2O5 related with the loss process of NOx, and some trace species such as ozone, NO, NO2, VOCs and aerosol in nighttime. These measurements provide me the information about the loss amount of NOx during nighttime. I am trying to the measurements for each season and some places to know the dependence of the loss amount of NOx on the seasonal and geophysical conditions.

About TUAT's tenure-track program

The Tenure Track Program in TUAT provides me a good research environment because it provides me a sufficient fund, independent laboratory, good advice from senior researcher, and reduction of the load of education and committee work.

Future aspirations

The increment of the concentration of photochemical oxidant is one of the important issues. In addition developing countries has faced with the same issues. Photochemical oxidant acts not only on the atmospheric pollutant gas but also on the greenhouse gas. Viewed in this light, it has been thought that reduction of pollutant species contributes to the restriction of the greenhouse effect. I have believed that my research contributes to the solution of many atmospheric issues in some day.