Research statement 

I am interested in many topics on Environmental Geochemistry including atmospheric chemistry, biogeochemistry, etc. My motivation driven by curiosity is not limited to a “-sphere” (atmosphere, biosphere, cryosphere, etc.) or a “-phase” (gas-phase, liquid-phase, and solid-phase) but opened to the entire system in the Earth and Space. The ultimate motive of my research is to understand the origins and evolutions of all elements. My previous and current research projects span from fundamental isotope effects (e.g. kinetic and equilibrium fractionations for atmospheric photochemistry, microbial metabolism) to their applications in various fields including polar regions of Antarctica, Arctic, and “Third Pole” like the Tibetan Plateau and the Himalayas. In addition to the isotopologues analyses for the laboratory-based experiments and field campaigns, I also use global chemical transport models (GEOS-Chem) to help the quantitative understanding. 

My motivation is also opened to the development of the new analytical method for new isotopologues. I have so far developed several analytical systems by myself and I am familiar with high throughput isotopic measurements by laboratory automation. I believe the new finding is always created by the innovative isotope tracers such as the mass-independent isotope effects (MIF), site-specific isotope effect (SP), and clumped isotope effect (Clumped). I served as an elected councilor of the Geochemical Society of Japan between 2019-2021, and served as the secretary for event mission for Geochemical Society of Japan. 

Keyword: MIF; SP; Clumped; KIE; Aerosols (sulfate, nitrate, ammonium); Oxidants (O3, OH, H2O2); Carbonyl sulfide (COS or OCS); Ice Core; Glacier; Photochemistry; Microbial ecosystem; Atmospheric acidity Fields: Atmosphere (troposphere and stratosphere), Biosphere, Cryosphere

Publication

(* denotes corresponding author, #denotes student/postdoc in our group)

47. Kantnerová, K.,Hattori, S., Toyoda, S., Yoshida, N., Emmenegger, L., Bernasconi, S.M. and Mohn, J., 2022. Clumped isotope signatures of nitrous oxide formed by bacterial denitrification. Geochimica et Cosmochimica Acta, 328, 120-129, 2022.

46. Miyamoto, C., Iizuka, Y., Matoba, S.,Hattori, S. and Takahashi, Y., 2022. Gypsum formation from calcite in the atmosphere recorded in aerosol particles transported and trapped in Greenland ice core sample is a signature of secular change of SO2 emission in East Asia. Atmospheric Environment, 278, p.119061.

45. Baartman, S.L., Krol, M.C., Röckmann, T., Hattori, S., Kamezaki, K., Yoshida, N. and Popa, M.E.: A GC-IRMS method for measuring sulfur isotope ratios of carbonyl sulfide from small air samples.Open Research Europe, 1(105), p.105, 2022.

44. Zhai, S., X. Wang, J.R. McConnell, L. Geng, J. Cole-Dai, N. Chellman, T. Sherwen, R. Pound, K. Fujita, S. Hattori, J.M. Moch, L. Zhu, M.J. Evans, M. Legrand, P. Liu, D. Pasteris, Y.-C. Chan, L.T. Murray, and Becky Alexander, Anthropogenic impacts on tropospheric reactive chlorine since the preindustrial, Geophys. Res. Lett. 48 (14), e2021GL093808, doi: 10.1029/2021GL093808 (2021).

43. Wang, K., Hattori, S.*, Lin, M., Ishino, S., Alexander, B., Kamezaki, K., Yoshida, N., and Kang, S.*: Isotopic constraints on atmospheric sulfate formation pathways in the Mt. Everest region, southern Tibetan Plateau, Atmos. Chem. Phys., 21, 8357–8376, 2021.

42.Hattori, S.*, Y. Iizuka, B. Alexander, S. Ishino, K. Fujita, S. Zhai, T. Sherwen, N. Oshima, R. Uemura, A. Yamada, N. Suzuki, S. Matoba, A. Tsuruta, J. Savarino, and N. Yoshida, Isotopic evidence for acidity-driven enhancement of sulfate formation after SO2 emission control, Science Advances, 7(19), eabd4610, doi:10.1126/sciadv.abd4610 (2021).

41. Ishino, S.#, Hattori, S.*, M. Legrand, Q. Chen, B. Alexander, J. Shao, J. Huang, L. Jaegle, B. Jourdain, S. Preunkert, A. Yamada, N. Yoshida, and J. Savarino, Regional characteristics of atmospheric sulfate formation in East Antarctica imprinted on 17O-excess signature, J. Geophys. Res. Atmos., e2020JD033583, doi: 10.1029/2020JD033583, 2021.

40. Chun, Y., Kim, D., Hattori, S., Toyoda, S., Yoshida, N., Huh, J., Lim, J., Park, J.: Temperature control on wastewater and downstream nitrous oxide emissions in an urbanized river system, Water Research, 187, 116417, 2020.

39. Lin M.#, Hattori, S., Wang K., Kang S., Thiemens M., Yoshida N.: A complete isotope (δ15N, δ18O, Δ17O) investigation of atmospherically deposited nitrate in glacial-hydrologic systems across the Third Pole region, J. Geophys. Res. Atmos., 125, 19, 2020

38. Wang, K.#, Hattori, S., Kang, S., Lin, M., Yoshida, N.: Isotopic constraints on the formation pathways and sources of atmospheric nitrate in the Mt. Everest region, Environmental Pollution, Volume 267, 115274, 2020.

37.Hattori, S.*, Kamezaki, K.*#, Yoshida, N.: Constraining the atmospheric OCS budget from sulfur isotopes Proc. Natl. Acad. Sci. USA, 117(34), 20447-20452, DOI: doi.org/10.1073/pnas.2007260117, 2020.

36. Ishino, S.*#, Hattori, S.*, Savarino, J., Legrand, M., Albalat, E., Albarede, F., Preunkert, S., Jourdain, B., Yoshida, N.: Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle, Scientific Reports, 9, 12378, 2019.

35.Hattori, S.*, Nuñez Palma, Y.#, Itoh, Y., Kawasaki, M., Fujihara, Y., Takase, K.,  & Yoshida, N.: Isotopic evidence for seasonality of microbial internal nitrogen cycles in a temperate forested catchment with heavy snowfall,  Science of the Total Environment, 690, 290-299 , 2019.

34. K. Goto-Azuma, M. Hirabayashi, H. Motoyama, T. Miyake, T. Kuramoto, R. Uemura, M. Igarashi, Y. Iizuka, T. Sakurai, S. Horikawa, K. Suzuki, T. Suzuki, K. Fujita, Y. Kondo, Hattori, S. & Y. Fuji: Reduced marine phytoplankton sulphur emissions in the Southern Ocean during the past seven glacials, Nature Communications, volume 10, Article number: 3247 (2019)

33. Kamezaki, K.#, Hattori, S.*, Iwamoto, Y., Ishino, S., Furutani, H., Miki, Y., ... & Yoshida, N. (2019). Tracing the sources and formation pathways of atmospheric particulate nitrate over the Pacific Ocean using stable isotopes. Atmos. Environ..,152-166, 2019.

32. Geng, L., Savarino, J., Caillon, N., Gautier, E., Farquhar, J., Dottin III, J. W., Magalhaes, N., Hattori, S., Ishino, S., Yoshida, N., Albarede, F., Abalate, E., Cartigny, P., Ono, S., Thiemens, M. H.: Intercomparison measurements of two 33S enriched sulfur isotope standards, J. Anal. At. Spectrom, 34, 1263-1271, 2019.

31. Kamezaki, K.#, Hattori, S.*, Bahlmann, E., and Yoshida, N.: Large-volume air sample system for measuring 34S ∕ 32S isotope ratio of carbonyl sulfide, Atmos. Meas. Tech., 12, 1141-1154, https://doi.org/10.5194/amt-12-1141-2019, 2019.

30. Gautier, E., Savarino, J., Hoek, J., Erbland, J., Caillon, N., Hattori, S., Yoshida, N., Albalat, E., Albarede, F, Farquhar, J.: 2600-years of stratospheric volcanism through sulfate isotopes Nature Communications, volume 10, Article number: 466 (2019)

29. Ijiri, A., Inagaki, F., Kubo, Y., Adhikari, R. R., Hattori, S., Hoshino, T., and 35 authors. (2018). Deep-biosphere methane production stimulated by geofluids in the Nankai accretionary complex. Science Advances, 4(6), eaao4631.

28. Yue, F. J., Li, S. L., Liu, C. Q., Mostofa, K. M., Yoshida, N., Toyoda, S., Wang, S. L., Hattori, S., & Liu, X. L. (2018). Spatial variation of nitrogen cycling in a subtropical stratified impoundment in southwest China, elucidated by nitrous oxide isotopomer and nitrate isotopes. Inland Waters, Volume 8, Issue 2,186-195.

27. Noro, K.#, Hattori, S.*, Uemura, R., Fukui, K., Hirabayashi M., Kawamura K., Takenaka N., Yoshida, N.: Spatial variation of isotopic compositions of snowpack nitrate related to post-depositional processes in eastern Dronning Maud Land, East Antarctica, Geochemical Journal Express Letter, Vol. 52 (No. 2), pp. e7-e14, 2018.

26. Iizuka, Y., Uemura, R., Fujita, K., Hattori, S., Seki, O., Miyamoto, C., Suzuki, T., Yoshida, N., Motoyama, H., Matoba, S.: A 60‐year record of atmospheric aerosol depositions preserved in a high‐accumulation dome ice core, southeast Greenland. J. Geophys. Res. Atmos. 10.1002/2017JD026733, 123 (1), 574-589, 2018

25. Geng, L., Savarino, J., Savarino, C., Caillon, N., Cartigny, P., Hattori, S., Ishino, S., Yoshida, N.: A simple and reliable method reducing sulfate to sulfide for multiple sulfur isotope analysis. Rapid Communications in Mass Spectrometry. 32(4):333-341, doi: 10.1002/rcm.8048, 2018.

24. Maeda, K., Toyoda, S., Philippot, L., Hattori, S., Nakajima, K., Ito, Y., Yoshida, N.: Relative contribution of nirK- and nirS- bacterial denitrifiers as well as fungal denitrifiers to nitrous oxide production from dairy manure compost. Environ. Sci. Technol., 51 (24), pp 14083–14091, 2017

23. Ogawa, T.#, Hattori, S., Kamezaki, K., Kato, H., Yoshida, N., Katayama, Y. *: Isotopic Fractionation of Sulfur in Carbonyl Sulfide by Carbonyl Sulfide Hydrolase of Thiobacillus thioparus THI115, Microbes and Environments, Vol. 32, 4, 367-375, 2017

22. Ishino, S.#, Hattori, S., Savarino, J., Jourdain, B., Preunkert, S., Legrand, M., Caillon, N., Barbero, A., Kuribayashi, K., Yoshida, N.: Seasonal variations of triple oxygen isotopic compositions of atmospheric sulfate, nitrate and ozone at Dumont d’Urville, coastal Antarctica, Atmos. Chem. Phys., 17, 3713-3727, 2017 (Highlight articles)

21.Hattori, S.*, Savarino, J., Kamezaki, K., Ishino, S., Dyckmans, J., Fujinawa, T., Caillon, N., Barbero, A., Mukotaka, A., Toyoda, S., Well, R., Yoshida, N.: Automated system measuring triple oxygen and nitrogen isotope ratios in nitrate using the bacterial method and N2O decomposition by microwave discharge, Rapid Commun. Mass Spectrom., 30 (24), 2635-2644, 2016

20. Kamezaki, K.#, Hattori, S.*, Ogawa, T., Toyoda, S., Kato, H., Katayama, Y., Yoshida, N.,: Sulfur isotopic fractionation of carbonyl sulfide during degradation by soil bacteria, Environ. Sci. Technol., 50 (7), 3537–3544, DOI:10.1021/acs.est.5b05325, 2016.

19.Hattori, S.*, Ishino, S., Kamezaki, K., and Yoshida N.: Review of Stable Isotope Analysis for Atmospheric Sulfate and Its Related Species, Earozoru Kenkyu, 31(1),  2016. [In Japanese with English abstract]

18. Maeda, K., Toyoda, S., Yano, M., Hattori, S., Fukasawa, M., Nakajima, K., and Yoshida, N.: Isotopically enriched ammonium shows high nitrogen turnover in the pile top zone of dairy manure compost, Biogeosciences, 13, 1341-1349, doi:10.5194/bg-13-1341-2016, 2016

17. Zou, Y., Hirono, Y., Yanai, Y., Hattori, S., Toyoda, S., Yoshida, N.: Rainwater, soil water, and soil nitrate effects on oxygen isotope ratios of nitrous oxide produced in a green tea (Camellia sinensis) field in Japan, Rapid Commun. Mass Spectrom, Volume 29, Issue 9, 891–900, 2015

16. Endo, Y., Danielache, S.O., Ueno, Y., Hattori, S., Johnson M. S., Yoshida., N., Kjaergaard H. G.: Photoabsorption cross-section measurements of 32S, 33S, 34S and 36S sulfur dioxide from 190 to 220 nm. J. Geophys. Res. Atmos., 120 (6), 2546-2557, D2430110.1002/2014JD021671 2015

15.Hattori, S.*, Toyoda, A., Toyoda, S., Ishino S., Ueno, Y., Yoshida, N.: Determination of the Sulfur Isotope Ratio in Carbonyl Sulfide using Gas Chromatography/Isotope Ratio Mass Spectrometry on Fragment Ions 32S+, 33S+, and 34S+ Analytical Chemistry, 87, 477−484, DOI: 10.1021/ac502704d, 2015

14. Kawagucci, S., Kobayashi, M.#, Hattori, S., Yamada, K., Ueno, Y., Takai, K., Yoshida, N.: Hydrogen isotope systematics among H2-H2O-CH4 during the growth of the hydrogenotrophic methanogen Methanothermobacter thermoautotrophicus strain ΔH Geochimica et Cosmochimica Acta, vol 142, 601-614, 2014

13. Zou, Y.#, Hirono, Y., Yanai, Y., Hattori, S., Toyoda, S., Yoshida, N.: Isotopomer analysis of nitrous oxide accumulated in soil cultivated with tea (Camellia sinensis) in Shizuoka, central Japan, Soil Biology and Biochemistry, Volume 77, October 2014, Pages 276-291, ISSN 0038-0717,

12.Hattori, S.*, Schmidt, J. A., Johnson, M. S., Danielache, S. O., Yamada, A., Ueno, Y., and Yoshida, N.*: SO2 photoexcitation mechanism links mass-independent sulfur isotopic fractionation in cryospheric sulfate to climate impacting volcanism, Proc. Natl. Acad. Sci. USA, vol.110 no. 44, 17656-17661, doi:10.1073/pnas.1213153110, 2013.

11. Schmidt, J. A., Johnson, M. S., Hattori, S., Yoshida, N., Nanbu, S., and Schinke, R.: OCS photolytic isotope effects from first principles: sulfur and carbon isotopes, temperature dependence and implications for the stratosphere, Atmos. Chem. Phys., 13, 1511-1520, doi:10.5194/acp-13-1511-2013, 2013.

10. Danielache, S., Hattori, S., Johnson, M.S., Ueno Y., Nanbu, S., Yoshida, N.: Photoabsorption cross-section measurements of 32S, 33S, 34S and 36S sulfur dioxide for the B1B1-X1A1 absorption band, J. Geophys. Res. Atmos.,  VOL. 117, D24301,doi:10.1029/2012JD017464, 2012

9. Nakagawa, M., Ueno, Y., Hattori, S., Umemura, M., Yagi, A., Takai, K., Koba K., Sasaki, Y., Makabe, A., Yoshida, N. Seasonal change in microbial sulfur cycling in monomictic Lake Fukami-ike, Japan, Limnol. Oceanogr., 57(4), 974-988, DOI: 10.4319/lo.2012.57.4.0974. 2012.

8.Hattori, S.*, Nashimoto, H., Kimura, H., Koba, K., Yamada, K., Shimizu, M., Watanabe, H., Yoh, M., Yoshida, N.: Hydrogen and carbon isotope fractionation by thermophilic hydrogenotrophic methanogens from a deep aquifer under coculture with fermenters. Geochem. J., 46, 3, 193-200, doi:10.2343/geochemj.1.0161, 2012

7. Enghoff, M. B., Bork, N., Hattori, S., Meusinger, C., Nakagawa, M., Pedersen, J. O. P., Danielache, S. O., Ueno, Y., Johnson, M. S., Yoshida, N., and Svensmark, H.: An isotope analysis of ionising radiation as a source of sulphuric acid, Atmos. Chem. Phys., 12, 5319-5327, doi:10.5194/acp-12-5319-2012, 2012.

6.Hattori, S.*, Schmidt J., Mahler D., Danielache, S., Johnson M. S., Yoshida N.: Isotope Effect in the Carbonyl Sulfide Reaction with O(3P), J. Phys. Chem. A, 116, 3521-3526, doi: 10.1021/jp2120884, 2012.

5. Schmidt, J. A., Johnson, M. S., Jung, Y., Danielache, S. O., Hattori, S., Yoshida, N. Predictions of the sulfur and carbon kinetic isotope effects in the OH + OCS reaction, Chem. Phys. Lett., 531, 64-69, DOI:10.1016/j.cplett.2012.02.049, 2012.

4.Hattori, S.*, Danielache, S. O., Johnson, M. S., Schmidt, J. A., Kjaergaard, H. G., Toyoda, S., Ueno, Y., and Yoshida, N.: Ultraviolet absorption cross sections of carbonyl sulfide isotopologues OC32S, OC33S, OC34S and O13CS: isotopic fractionation in photolysis and atmospheric implications, Atmos. Chem. Phys., 11, 10293-10303, doi:10.5194/acp-11-10293-2011, 2011.

3. Toyoda, S., Suzuki, Y., Hattori, S., Yamada, K., Fujii, A., Yoshida, N., Kouno, R., Murayama, K., Shiomi, H. Isotopomer Analysis of Production and Consumption Mechanisms of N2O and CH4 in an Advanced Wastewater Treatment System Environ. Sci. Tech., 45 (3), 917-922, doi: 10.1021/es102985u, 2011.

2. Kimura, H., Nashimoto, H., Shimizu, M., Hattori, S., Yamada, K., Koba, K., Yoshida, N., Kato, K.: Microbial methane production in deep aquifer associated with the accretionary prism in Southwest Japan. The ISME Journal, 4, 531-541, doi:10.1038/ismej.2009.132, 2010.

1. Kimura, H., Mori, K., Nashimoto, H., Hattori, S., Yamada, K., Koba, K., Yoshida, N., Kato, K.: Biomass production and energy source of thermophiles in a Japanese alkaline geothermal pool. Environ. Microbiol., 12, 480-489, doi: 10.1111/j.1462-2920.2009.02089.x., 2010.

Seiichi Tejima Doctoral Dissertation Award, 2013

Young Scientist Award, Geochemical Society of Japan, 2015

Tokyo Tech. Education Award (received for our class group), 2018

Asahi Group Environmental & Sustainability Research Award, 2022

Hirata Award (平田賞), Japanese Society of Snow and Ice, 2022