Sea ice biogeochemistry
Polar ocean biogeochemistry 

Our laboratory is focusing on the biogeochemical cycles in the ocean and sea ice and their effects on the oceanic and atmospheric environment. Target parameters are organic and inorganic gasses in the ocean and sea ice. Research area is from Arctic, Okhotsk, Bering, Pacific, coast of Hokkaido to Southern Oceans. We welcome your joining as Master and Ph.D course students and JSPS postdoctoral fellow.

2004 May: Chukchi Sea, off Barrow, Alaska (Sea ice field course) 
 
2005, 2006, 2007, 2008, 2009, 2011, 2014, 2016, 2017, 2018, 2019, 2021, 2022, 2023. February/March: Southern Sea of Okhotsk/Saroma-ko Lagoon, Hokkaido, Japan 
 
2007 March: Baltic Sea, Finland (Sea ice field course) 
  
2008 May: Chukchi Sea, off Barrow, Alaska (Sea ice field course) 
 
2009 December–2010 March: Lützow-Holm Bay, off Syowa Station Antarctica (JARE51) 
  
2011 April–May: North of Svalbard, Arctic Ocean by Lance (ICE11) 
 
2012 January–April: Tempelfjorden in Svalbard, High Arctic (TEMP12) 
 
2012 September–November: Southern Ocean by Aurora Australis (SIPEX-II) 
  
2013 June–August: The Weddell Sea, Mid-winter cruise by Polarstern (AWECS) 
 
2015 February–March: Arctic Ocean, Mid-winter (leg 2): Norwegian Young Sea Ice cruise by Lance (N-ICE2015) 
 
2017 July–August: Bowdoin fjord, Greenland: ArCS project. 
 
2018 July-September: Gulf of Anadyr, Bering Sea by Prof. Multanovskiy (Mu18): ArCS project. 
 
2018 December-2019 January: Southern Ocean by Kaiyo-maru (KY18-4: Leg.1) (BROKE revisit cruise)
 
2020 January: Sea ice tank experiment in Roland von Glasow air-sea-ice chamber (University of East Anglia). ECV-Ice sea ice storage inter-comparison experiment. 
 
2020 February: Eddy covariance experiment in Tsukuba, Japan. ECV-Ice eddy covariance air-sea ice CO2 flux inter-comparison measurement.
 
2020 July-October: Central Arctic Ocean by Akademic Tryoshnikov and Polarstern (PS122/5): MOSAiC
 
2021 August-October: Pacific sector of Arctic Ocean by R/V Mirai (MR21-05C): ArCS II.

2022 April-June: Inter-comparison experiments in Cambridge Bay, Canada: ECV-Ice. 

2023 May: Eddy covariance CO2 flux measurement and sea ice biogeochemical study in Cambridge Bay, Canada: ArCS II. 

2023 July-August: Chukchi Sea, Arctic Ocean by Oshoro-maru: ArCS II.

As first and corresponding authors

Nomura, D., Sahashi, R., Takahashi, K. D., Makabe, R., Ito, M., Tozawa, M., Wongpan P., Matsuda, R., Sano, M., Yamamoto-Kawai, M., Nojiro, N., Tachibana, A., Kurosawa, N., Moteki, M., Tamura, T., Aoki, S., Murase, H. (2023). Biogeochemical characteristics of brash sea ice and icebergs during summer and autumn in the Indian sector of the Southern Ocean. Progress in Oceanography. 214, 103023, https://doi.org/10.1016/j.pocean.2023.103023.

Nomura, D., Kawaguchi, Y., Webb, A., Li, Y., Dall’osto, M., Schmidt, K., Droste, E. S., Chamberlain, E. J., Kolabutin, N., Shimanchuk, E., Hoppmann, M., Gallagher, M. R., Meyer, H., Mellat, M., Bauch, D., Gabarró, C., Smith, M. M., Inoue, J., Damm, E., Delille, B. (2023). Meltwater layer dynamics in a central Arctic lead: Effects of lead width, re-freezing, and mixing during late summer. Elementa, Science of the Anthropocene. 11: 1. DOI: https://doi.org/10.1525/elementa.2022.00102.

Nakajima, H., Nomura, D. (2022). Factors controlling the precipitation of ikaite crystals within sea ice in the laboratory experiment. Seppyo (The Japanese Society of Snow and Ice). In Japanese with English abstract. 84, 6, 503–514. https://doi.org/10.5331/seppyo.84.6_503.

Tamura, T. P., Nomura, D., Hirano, D., Tamura, T., Kiuchi, M., Hashida, G., Makabe, R., Ono, K., Ushio, S., Yamazaki, K., Nakayama, Y., Takahashi, K. D., Sasaki, H., Murase, H., Aoki, S. (2022). Impacts of basal melting of the Totten Ice Shelf and biological productivity on marine biogeochemical components in Sabrina Coast, East Antarctica. Global Biogeochemical Cycles. https://doi.org/10.1029/2022GB007510.

Silyakova, A., Nomura, D., Kotovitch, M., Fransson, A., Delille, B., Chierici, M., Granskog, M. A. (2022). Methane release from open leads and new ice following an Arctic winter storm event. Polar Science. 33. 100874. https://doi.org/10.1016/j.polar.2022.100874.

Horikawa, T., Nomura, D., Kanna, N., Fukamachi, Y., Sugiyama, S. (2022). Effects of the glacial meltwater supply on carbonate chemistry in Bowdoin Fjord, northwestern Greenland. Frontiers in Marine Science. 9:873860. doi: 10.3389/fmars.2022.873860. 

Sahashi, R., Nomura, D., Toyota, T., Tozawa, M., Ito, M., Wongpan, P., Ono, K., Simizu, D., Naoki, K., Nosaka, Y., Tamura, T., Aoki, S., Ushio, S. (2022). Effects of snow and remineralization processes on nutrient distributions in multi-year Antarctic landfast sea ice. Journal of Geophysical Research-Oceans. 127, e2021JC018371. https://doi.org/10.1029/2021JC018371.

Nomura, D., Ikawa, H., Kawaguchi, Y., Kanna, N., Kawakami, T., Nosaka, Y., Umezawa, S., Tozawa, M., Horikawa, T., Sahashi, R., Noshiro, T., Kaba, I., Ozaki, M., Kondo, F., Ono, K., Yabe, I. S., Son, E. Y., Toyoda, T., Kameyma, S., Wang, C., Obata, H., Ooki, A., Ueno, H., Kasai, A. (2022). Atmosphere–sea ice–ocean interaction study in Saroma-ko Lagoon, Hokkaido, Japan 2021. Bulletin of Glaciological Research, 40, 1–17, doi: 10.5331/bgr.21R02.

Nomura, D., Abe, H., Hirawake, T., Ooki, A., Yamashita, Y., Murayama, A., Ono, K., Nishioka, J. (2021). Formation of dense shelf water associated with sea ice freezing in the Gulf of Anadyr estimated with oxygen isotopic ratio. Progress in Oceanography, 196, 102595, https://doi.org/10.1016/j.pocean.2021.102595.
 
Kiuchi, M., Nomura, D., Hirano, D., Tamura, T., Hashida, G., Ushio, S., Simizu, D., Ono, K., Aoki, S. (2021). The effect of basal melting of the Shirase Glacier Tongue on the CO2 system in Lützow-Holm Bay, East Antarctica. Journal of Geophysical Research-Biogeosciences, 126, e2020JG005762. http://doi.org/10.1029/2020JG005762.
 
Murakami, K., Nomura, D., Hashida, G., Nakaoka, S., Kitade, Y., Hirano, D., Hirawake, T., Ohshima, K.I. (2020). Strong biological carbon uptake and carbonate chemistry associated with dense shelf water outflows in the Cape Darnley polynya, East Antarctica. Marine Chemistry, 225, 103842, https://doi.org/10.1016/j.marchem.2020.103842.

Nomura, D., Wongpan, P., Toyota, T., Tanikawa, T., Kawaguchi, Y., Ono, T., Ishino, T., Tozawa, M., Tamura, T. P., Yabe, I. S., Son, E. Y., Vivier, F., Lourenco, A., Lebrun, M., Nosaka, Y., Hirawake, T., Ooki, A.., Aoki, S, Else, B., Fripiat, F., Inoue, J., Vancoppenolle, M. (2020). Saroma-ko Lagoon Observations for sea ice Physico-chemistry and Ecosystems 2019 (SLOPE2019). Bulletin of Glaciological Research, 38, 1–12, doi:10.5331/bgr.19R02. 

Nomura, D., Kanna, N., Ooki, A. (2019). Effects of glacier and sea ice melting on the biogeochemical cycles in the surface water of the Arctic Ocean. In Japanese with English abstract, figures, and table. Chikyu-Kagaku (Geochemistry), 53, 149-158, doi:10.14934/chikyukagaku.53.149.
 
Nomura, D. (2018). Effects of sea ice freezing and melting on air-sea CO2 exchange. Archives of Atmospheric Chemistry Research, In Japanese, 38, 038A03. 

Nomura, D., Granskog, M.A., Fransson, A., Chierici, M., Silyakova, A., Ohshima, K.I., Cohen, L., Delille, B., Hudson, S.R., Dieckmann, G.S. (2018). CO2 flux over young and snow-covered Arctic pack ice in winter and spring. Biogeosciences, 15, pp3331–3343, https://doi.org/10.5194/bg-15-3331-2018.

Nomura, D., Aoki, S., Simizu, D., Iida, T. (2018). Influence of sea ice crack formation on the spatial distribution of nutrients and microalgae in flooded Antarctic multi-year ice. Journal of Geophysical Research-Oceans. DOI:10.1002/2017JC012941.
 
Nomura, D. (2015). Effects of sea-ice growth and decay processes on the biogeochemical cycles in the polar oceans. Umi no Kenkyu (Oceanography in Japan), In Japanese with English abstract and figures, 24, 2. https://doi.org/10.5928/kaiyou.24.2_51.
 
Nomura, D., Yoshikawa-Inoue, H., Kobayashi, S., Nakaoka, S., Nakata, K., Hashida, G. (2014). Winter to summer evolution of pCO2 in surface water and air-sea CO2 flux in the seasonal ice zone of the Southern Ocean. Biogeosciences, 11, pp5749–5761. https://doi.org/10.5194/bg-11-5749-2014.
 
Nomura, D., Granskog, M.A., Assmy, P., Simizu, D., Hashida, G. (2013). Arctic and Antarctic sea ice acts as a sink for atmospheric CO2 during periods of snow melt and surface flooding. Journal of Geophysical Research-Oceans, 118, doi:10.1002/2013JC009048. https://doi.org/10.1002/2013JC009048.
 
Nomura, D., Assmy, P., Nehrke, G., Granskog, M.A., Fischer, M., Dieckmann, G.S., Fransson, A., Hu, Y., Schnetger, B. (2013). Characterization of ikaite (CaCO3•6H2O) crystals in first-year Arctic sea ice north of Svalbard. Annals of Glaciology, 54, 62, pp125–131, doi:10.3189/2013AoG62A034. https://doi.org/10.3189/2013AoG62A034.
 
Nomura, D., Simizu, D., Chavanich, S., Shinagawa, H., Fukuchi, M. (2012). An artificial pool experiment in Antarctic sea ice: Effects of sea-ice melting on physical and biogeochemical components of pool water. Antarctic Science, doi.10.1017/S0954102012000284. https://doi.org/10.1017/S0954102012000284.
 
Nomura, D., Koga, S., Kasamatsu, N., Shinagawa, H., Simizu, D., Wada, M., Fukuchi, M. (2012). Direct measurements of DMS flux from Antarctic fast sea ice to the atmosphere by a chamber technique. Journal of Geophysical Research-Oceans, 117, C04011, doi: 10.1029/2010JC006755. https://doi.org/10.1029/2010JC006755.
 
Nomura, D., McMinn, A., Hattori, H., Aoki, S., Fukuchi, M. (2011). Incorporation of nitrogen compounds into sea ice from atmospheric deposition. Marine Chemistry, 127, pp90–99. https://doi.org/10.1016/j.marchem.2011.08.002.
 
Nomura, D., Simizu, D., Shinagawa, H., Oouchida, C., Fukuchi, M. (2011). Biogeochemical properties of water in surface ponds on Antarctic fast ice and relationship to underlying sea ice properties. Journal of Glaciology, 57, 205, pp1–9. https://doi.org/10.3189/002214311798043825.
 
Nomura, D., Ooki, A., Simizu, D., Fukuchi, M. (2011). Bromoform concentrations in slush-layer water in Antarctic fast ice. Antarctic Science, 23, 6, pp623–628. https://doi.org/10.1017/S0954102011000459.
 
Nomura, D., Kasamatsu, N., Tateyama, K., Kudoh, S., Fukuchi, M. (2011). DMSP and DMS in coastal fast ice and under-ice water of Lützow-Holm Bay, eastern Antarctica. Continental Shelf Research, 31, pp1377–1383. https://doi.org/10.1016/j.csr.2011.05.017.
 
Nomura, D., Eicken, H., Gradinger, R., Shirasawa, K. (2010). Rapid physically driven inversion of the air-sea ice CO2 flux in the seasonal landfast ice off Barrow, Alaska after onset of surface melt. Continental Shelf Research, 30, pp1998–2004. https://doi.org/10.1016/j.csr.2010.09.014.
 
Nomura, D., Nishioka, J., Granskog, M., Krell, A., Matoba, S., Toyota, T., Hattori, H., Shirasawa, K. (2010). Nutrient distributions associated with snow and sediment layers in sea ice of the southern Sea of Okhotsk. Marine Chemistry, 119, pp1–8. https://doi.org/10.1016/j.marchem.2009.11.005.
 
Nomura, D., Yoshikawa-Inoue, H., Toyota, T., Shirasawa, K. (2010). Effects of snow, snowmelting and refreezing processes on air–sea-ice CO2 flux. Journal of Glaciology, 56, 196, pp262–270. https://doi.org/10.3189/002214310791968548.
 
Nomura, D., Takatsuka, T., Ishikawa, M., Kawamura, T., Shirasawa, K., Yoshikawa-Inoue, H. (2009). Transport of chemical components in sea ice and under-ice water during melting in the seasonally ice-covered Saroma-ko Lagoon, Hokkaido, Japan. Estuarine, Coastal and Shelf Science, 81, pp201–209. https://doi.org/10.1016/j.ecss.2008.10.012.
 
Nomura, D., Inoue-Yoshikawa, H., Toyota, T. (2006). The effect of sea-ice growth on air-sea CO2 flux in a tank experiment. Tellus, 58B, pp418–426. https://doi.org/10.1111/j.1600-0889.2006.00204.x.