Influence of sea ice loss and oceanic eddies to biological pump condition in the western Arctic Ocean

• Project/Area Number: 15H01736
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: ONODERA Jonaotaro 国立研究開発法人海洋研究開発機構, 地球環境観測研究開発センター, 主任研究員 (50467859)
• Co-Investigator(Kenkyū-buntansha): 田中 裕一郎 国立研究開発法人産業技術総合研究所, 地質調査総合センター, 研究部門長 (50357456) ; 渡邉 英嗣 国立研究開発法人海洋研究開発機構, 北極環境変動総合研究センター, 研究員 (50722550) ; 溝端 浩平 東京海洋大学, 海洋環境科学部門, 助教 (80586058)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥45,630,000 (Direct Cost: ¥35,100,000、Indirect Cost: ¥10,530,000); Fiscal Year 2018: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000); Fiscal Year 2017: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000); Fiscal Year 2016: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000); Fiscal Year 2015: ¥14,820,000 (Direct Cost: ¥11,400,000、Indirect Cost: ¥3,420,000)
• Keywords: 北極海 / 海洋物理 / 海洋循環 / 海洋渦 / 物質循環 / セジメントトラップ / 海洋低次生態系 / 海洋環境変動 / 物質輸送 / 数値モデル実験 / 沈降粒子 / 海洋科学 / 環境変動 / 海洋生態 / 自然現象観測・予測 / 北極海カナダ海盆 / チュクチ海 / ノースウィンド深海平原 / 海洋表層循環 / 沈降粒子フラックス / チャクチ海 / 微小プランクトン

Outline of Final Research Achievements

We studied relationship between physical oceanographic condition (dynamics of sea-surface current system and oceanic eddies) and transportation of shelf materials (such as plankton remains and lithogenic matters) to basin in Pacific side of the Arctic Ocean (western Canada Basin and Chukchi Borderland) where recent sea-ice reduction is remarkable. Annual and interannual fixed-point observation using sediment trap mooring showed that supply of shelf-origin particles increased when lateral advection of Pacific-origin water and oceanic eddies containing shelf matters reached to the monitoring stations. It was suggested that large interannual differences on physical oceanographic dynamics for 2011-2018 changed the distribution of laterally transported shelf-origin matters in offshore side of study region. It is suggested that those hydrographic changes influence to lower-trophic ecosystems applying shelf-origin matters in the basin side.

Academic Significance and Societal Importance of the Research Achievements

対象海域における年間を通じた海中の現場観測は事例が少なく、貴重な観測データを得ることができた。本課題で得られた観測データや研究成果は、北極海の環境変化にともなう生態系への影響など環境動態把握の一助となることが期待される。北極海中央域では、今後の海氷減少に伴い海洋資源の活用が期待されているが、その一方で環境保全に向けた北極生態系の動態理解はまだ不十分である。2017年秋に、少なくとも今後16年間は北極海において商用漁業を規制する取り決めが国際的に交わされた。それまでに多くの観測研究から環境評価を進める必要があり、本課題で得られたデータや成果は、その課題の基礎的な部分で貢献しうるものと思われる。

Research Products

• [Journal Article] Seasonal phenology of four dominant copepods in the Pacific sector of the Arctic Ocean: Insights from statistical analyses of sediment trap data (2019)
  • Author(s): Tokuhiro Koki、Abe Yoshiyuki、Matsuno Kohei、Onodera Jonaotaro、Fujiwara Amane、Harada Naomi、Hirawake Toru、Yamaguchi Atsushi
  • Journal Title: Polar Science Volume: 19 Pages: 94-111
  • DOI: 10.1016/j.polar.2018.08.006
  • NAID: 120006980044
  • Peer Reviewed
• [Journal Article] Winter transport of subsurface warm water toward the Arctic Chukchi Borderland (2017)
  • Author(s): Watanabe Eiji、Onodera Jonaotaro、Itoh Motoyo、Nishino Shigeto、Kikuchi Takashi
  • Journal Title: Deep Sea Research Part I: Oceanographic Research Papers Volume: 128 Pages: 115-130
  • DOI: 10.1016/j.dsr.2017.08.009
  • Peer Reviewed
• [Journal Article] Wintertime variability of the Beaufort Gyre in the Arctic Ocean derived from CryoSat-2/SIRAL observations (2016)
  • Author(s): Mizobata, K., E. Watanabe, and N. Kimura
  • Journal Title: Journal of Geophysical Research Volume: 121 Issue: 3 Pages: 1685-1699
  • DOI: 10.1002/2015jc011218
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Distribution and vertical fluxes of silicoflagellates, ebridians, and the endoskeletal dinoflagellate Actiniscus in the western Arctic Ocean (2016)
  • Author(s): Onodera J, Watanabe E, Nishino S, Harada N
  • Journal Title: Polar Biology Volume: 39 Issue: 2 Pages: 327-341
  • DOI: 10.1007/s00300-015-1784-y
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Wind-driven interannual variability of sea ice algal production in the western Arctic Chukchi Borderland (2015)
  • Author(s): Watanabe, E., J. Onodera, N. Harada, M. N. Aita, A. Ishida, and M. J. Kishi
  • Journal Title: Biogeosciences Volume: 12 Issue: 20 Pages: 6147-6168
  • DOI: 10.5194/bg-12-6147-2015
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 北極海におけるカイアシ類群集構造の 季節変化およびその海域間比較 (2019)
  • Author(s): 徳弘航季、阿部義之、Eva-Maria Noethig、小野寺丈尚太郎、藤原周、三瓶真、松野孝平、山口 篤
  • Organizer: 海洋生物シンポジウム
• [Presentation] Lateral advection of biogenic particles in the southwestern Canada Basin, Arctic Ocean (2018)
  • Author(s): Jonaotaro Onodera, Eiji Watanabe, Kohei Mizobata, Yuichiro Tanaka, Motoyo Itoh, Naomi Harada
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] チャクチ海北東部陸棚縁辺部における太平洋起源水の移流について (2018)
  • Author(s): 村松美幌、上野洋路、伊東素代、渡邉英嗣、小野寺丈尚太郎
  • Organizer: 日本海洋学会
• [Presentation] Sea ice-ocean modeling study collaborated with the western Arctic sediment trap (2018)
  • Author(s): Eiji Watanabe
  • Organizer: POLAR 2018 SCAR/IASC Open Science Conference
  • Int'l Joint Research
• [Presentation] 西部北極海における再懸濁粒子の輸送モデリング (2018)
  • Author(s): 渡邉英嗣
  • Organizer: J-ARC Net共同研究集会
• [Presentation] Sea-ice thickness from moored ice-profiling sonar in the Canada Basin, Arctic Ocean (2018)
  • Author(s): Itoh, M., Y. Fukamachi, N. Kimura, R. A. Krishfield, T. Kikuchi, E. Moriya, J. Onodera, and N. Harada
  • Organizer: Fifth International Symposium on Arctic Research (ISAR-5)
  • Int'l Joint Research
• [Presentation] Seasonal variability of near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean (2018)
  • Author(s): Kawaguchi, Y., M. Itoh, Y. Fukamachi, E. Moriya, J. Onodera, and T. Kikuchi
  • Organizer: Fifth International Symposium on Arctic Research (ISAR-5)
  • Int'l Joint Research
• [Presentation] Settling particle flux and the possible influence of surface atmospheric forcing in the southern Northwind Abyssal Plain (2018)
  • Author(s): Onodera, J., Harada, N., and E. Watanabe
  • Organizer: Fifth International Symposium on Arctic Research (ISAR-5)
  • Int'l Joint Research
• [Presentation] Seasonal changes in the population structure of four dominant copepods collected by a sediment trap moored in the western Arctic Ocean (2018)
  • Author(s): Tokuhiro, K., Abe, H., Matsuno, K., Onodera, J., Fujiwara, A., Harada, N., Hirawake, T., Yamaguchi, A.
  • Organizer: Fifth International Symposium on Arctic Research (ISAR-5)
  • Int'l Joint Research
• [Presentation] 北極海炭酸系モデリング： 海面CO2フラックスの妥当性評価 (2017)
  • Author(s): 渡邉 英嗣
  • Organizer: J-ARC Net共同研究集会「北極海環境変動に関する発展的な異分野連携共同研究策定のための研究集会」
  • Place of Presentation: 北海道大学（北海道・札幌市）
  • Year and Date: 2017-03-15
• [Presentation] バロー北方沖とハンナ峡谷北部における沈降粒子と水塊環境の通年観測 (2017)
  • Author(s): 小野寺丈尚太郎、溝端浩平, 渡邉英嗣, 田中裕一郎, 木元克典, 原田尚美
  • Organizer: J-ArcNet共同利用研究集会「北極海環境変動に関する発展的な異分野連携共同研究策定のための研究集会」
  • Place of Presentation: 北海道大学（北海道・札幌市）
  • Year and Date: 2017-03-15
• [Presentation] Ocean Acidification in the Western Arctic Ocean - Its Impact on the Marine Plankton- (2017)
  • Author(s): Harada, N., K. Kimoto, and J. Onodera
  • Organizer: JSPS/NORPAN Symposium ‘Past, present, and future of the Arctic and Antarctic’ (Japan-Norway ASIW follow up symposium) - What’s done, What’s being done, What’s to be done after ASIW 2016
  • Int'l Joint Research
• [Presentation] A new approach to the partition of the biogenic silica production using Microfocus X-ray CT: radiolarian silica flux in the Chukchi Borderland (2017)
  • Author(s): Ikenoue, T., K. Kimoto, J. Onodera, K. R. Bjorklund, E. Watanabe, M. C. Honda, N. Harada, M. Itoh, S. Nishino, and T. Kikuchi
  • Organizer: 15th Meeting of the International Association of Radiolarists (InterRad XV)
  • Int'l Joint Research
• [Presentation] Sea-ice thickness from moored ice-profiling sonar in the Canada Basin, Arctic Ocean (2017)
  • Author(s): Itoh, M., Y. Fukamachi, N. Kimura, R. A. Krishfield, T. Kikuchi, E. Moriya, J. Onodera, and N. Harada
  • Organizer: Arctic Change 2017
  • Int'l Joint Research
• [Presentation] Advection of shelf materials in settling particles off the Barrow Canyon, western Arctic Ocean. (2017)
  • Author(s): Onodera, J., E. Watanabe, K. Mizobata, Y. Tanaka, K. Oguri, and N. Harada
  • Organizer: Ecosystem Study for Sub-Arctic and Arctic Seas (ESSAS) Annual Meeting
  • Int'l Joint Research
• [Presentation] Modeling study on regional variability in Arctic marine biological pump (2017)
  • Author(s): Watanabe, E.
  • Organizer: Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Workshop
  • Int'l Joint Research
• [Presentation] Decadal variations in ice algal productivity simulated by a pan-Arctic ice-ocean ecosystem model (2017)
  • Author(s): Watanabe, E.
  • Organizer: Ecosystem Study for Sub-Arctic and Arctic Seas (ESSAS) Annual Meeting
  • Int'l Joint Research
• [Presentation] Arctic sea ice-ocean modeling study in collaboration with sediment trap measurements (2017)
  • Author(s): Watanabe, E.
  • Organizer: IAPSO-IAMAS-IAGA Joint Assembly
  • Int'l Joint Research / Invited
• [Presentation] Winter transport of subsurface warm water toward the Arctic Chukchi Borderland (2017)
  • Author(s): Watanabe, E., J. Onodera, M. Itoh, S. Nishino, and T. Kikuchi
  • Organizer: Arctic Science Summit Week (ASSW)
  • Int'l Joint Research
• [Presentation] 西部北極海バロー峡谷沖における陸棚物質の水平輸送の通年モニタリング (2017)
  • Author(s): 小野寺丈尚太郎, 渡邉英嗣, 溝端浩平, 田中裕一郎, 小栗一将, 原田尚美
  • Organizer: 日本地球惑星科学連合大会 (JpGU)
• [Presentation] 北極海の沈降粒子捕集環境の観察 (2017)
  • Author(s): 小野寺丈尚太郎, 小栗一将, 田中裕一郎, 原田尚美
  • Organizer: 日本海洋学会秋季大会
• [Presentation] バロー北方沖とハンナ峡谷における粒子輸送の時系列観測 (2017)
  • Author(s): 小野寺丈尚太郎, 渡邉英嗣, 溝端浩平
  • Organizer: J -ArcNet北極海環境変動に関する発展的な異分野連携共同研究策定のための研究集会
• [Presentation] 北極海カナダ海盆におけるアイスアルジー基礎生産量の十年規模変動 (2017)
  • Author(s): 渡邉英嗣
  • Organizer: 日本海洋学会秋季大会
• [Presentation] Wind-driven variability in subsurface warm layers of the Chukchi shelf break (2016)
  • Author(s): Eiji Watanabe, Jonaotaro Onodera, Motoyo Itoh, Shigeto Nishino, Takashi Kikuchi
  • Organizer: ArcticNet Annual Science Meeting
  • Place of Presentation: ウィニペグ（カナダ）
  • Year and Date: 2016-12-07
  • Int'l Joint Research
• [Presentation] 北極海生態系モデリングの現状と課題： FAMOSプロジェクトの紹介 (2016)
  • Author(s): 渡邉 英嗣
  • Organizer: 東京大学大気海洋研究所共同利用研究集会
  • Place of Presentation: 東京大学大気海洋研究所（千葉県・柏市）
  • Year and Date: 2016-11-17
• [Presentation] Potential environmental changes in the western Arctic and the western North Pacific: their impacts on lower trophic level organisms (2016)
  • Author(s): Naomi Harada, Katsunori Kimoto, Jonaotaro Onodera, Eiji Watanabe, Koji Sugie, Masahide Wakita, Tetsuichi Fujiki
  • Organizer: North Pacific Marine Science Organization 2016 Annual Meeting
  • Place of Presentation: サンディエゴ（米国）
  • Year and Date: 2016-11-07
  • Int'l Joint Research / Invited
• [Presentation] Winter ocean heat transport driven by subsurface shelf-break jet north of Chukchi Sea (2016)
  • Author(s): Eiji Watanabe
  • Organizer: Forum for Arctic Modeling and Observational Synthesis (FAMOS) Workshop
  • Place of Presentation: ウッズホール（米国）
  • Year and Date: 2016-11-03
  • Int'l Joint Research
• [Presentation] 北極海チャクチ陸棚縁における冬季海氷下の亜表層暖水輸送 (2016)
  • Author(s): 渡邉 英嗣， 小野寺 丈尚太郎， 伊東 素代， 西野 茂人， 菊地 隆
  • Organizer: 日本海洋学会2016年度秋季大会
  • Place of Presentation: 鹿児島大学（鹿児島県・鹿児島市）
  • Year and Date: 2016-09-14
• [Presentation] 北極海環境変動における中規模渦の役割 (2016)
  • Author(s): 渡邉 英嗣
  • Organizer: 日本海洋学会2016年度秋季大会
  • Place of Presentation: 鹿児島大学（鹿児島県・鹿児島市）
  • Year and Date: 2016-09-13
  • Invited
• [Presentation] Shelf-basin interaction: its impact on Arctic marine biological pump (2016)
  • Author(s): Eiji Watanabe
  • Organizer: Japan-Norway Arctic Science and Innovation Week (ASIW)
  • Place of Presentation: 東京国際交流館プラザ平成（東京都・江東区）
  • Year and Date: 2016-06-02
  • Int'l Joint Research
• [Presentation] 西部北極海における厳冬期の亜表層暖水輸送 (2016)
  • Author(s): 渡邉 英嗣， 小野寺 丈尚太郎， 伊東 素代， 西野 茂人， 菊地 隆
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ（千葉県・千葉市）
  • Year and Date: 2016-05-26
• [Presentation] 北極海チャクチ海台における亜表層水温極大の年々変動メカニズム (2016)
  • Author(s): 渡邉英嗣, 小野寺丈尚太郎, 伊東素代, 西野茂人, 菊地隆
  • Organizer: 2016年度日本海洋学会春季大会
  • Place of Presentation: 東京大学（東京都文京区）
  • Year and Date: 2016-03-15
• [Presentation] Diatom settling flux and sea surface hydrography at the southeastern slope of Chukchi Abyssal Plain in 2012-2013 (2016)
  • Author(s): Onodera J, Watanabe E, Nishino S, Honda MC, Harada N
  • Organizer: Ecosystem Study for Sub-Arctic and Arctic Seas (ESSAS) 2016 Annual Meeting
  • Place of Presentation: 横浜ワールドポーターズ（神奈川県横浜市）
  • Year and Date: 2016-03-09
  • Int'l Joint Research
• [Presentation] Overwinter transport of subsurface warm water around the Arctic Chukchi Borderland (2016)
  • Author(s): Watanabe E, Onodera J, Itoh M, Nishino S, Kikuchi T
  • Organizer: Ecosystem Study for Sub-Arctic and Arctic Seas (ESSAS) 2016 Annual Meeting
  • Place of Presentation: 横浜ワールドポーターズ（神奈川県横浜市）
  • Year and Date: 2016-03-07
  • Int'l Joint Research
• [Presentation] Validation/calibration of sea surface salinity estimated by L-band microwave radiometers SAC-D/Aquarius in the Pacific sector of the Arctic Ocean (2016)
  • Author(s): Mizobata K, Satoh H
  • Organizer: Ecosystem Study for Sub-Arctic and Arctic Seas (ESSAS) 2016 Annual Meeting
  • Place of Presentation: 横浜ワールドポーターズ（神奈川県横浜市）
  • Year and Date: 2016-03-07
  • Int'l Joint Research
• [Presentation] Overwinter transport of subsurface warm water around the Arctic Chukchi Borderland (2016)
  • Author(s): Watanabe E, Onodera J, Nishino S, Kikuchi T
  • Organizer: 2016 Ocean Sciences Meeting
  • Place of Presentation: the Ernest N. Morial Convention Center, 米国ルイジアナ州ニューオリンズ市
  • Year and Date: 2016-02-22
  • Int'l Joint Research
• [Presentation] 西部北極海における亜表層水温極大モデリング (2015)
  • Author(s): 渡邉英嗣
  • Organizer: 平成27年度北海道大学低温科学研究所共同利用研究集会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2015-12-10
• [Presentation] 北極海チャクチ深海平原の春季水温極大 (2015)
  • Author(s): 渡邉英嗣, 小野寺丈尚太郎, 西野茂人, 菊地隆
  • Organizer: 2015年度日本海洋学会秋季大会
  • Place of Presentation: 愛媛大学（愛媛県松山市）
  • Year and Date: 2015-09-28
• [Presentation] Sea ice algal response to Beaufort Gyre Variation (2015)
  • Author(s): Watanabe E, Onodera J, Harada N, Aita MN, Ishida A, Kishi MJ
  • Organizer: Fourth International Symposium on the Arctic Research (ISAR-4)
  • Place of Presentation: 富山国際会議場（富山県富山市）
  • Year and Date: 2015-04-27
  • Int'l Joint Research
• [Presentation] Settling Diatom Flux Reflecting Hydrographic Change In The Western Arctic Ocean, 2010-2012 (2015)
  • Author(s): Onodera J, Watanabe E, Harada N
  • Organizer: Fourth International Symposium on the Arctic Research (ISAR-4)
  • Place of Presentation: 富山国際会議場（富山県富山市）
  • Year and Date: 2015-04-27
  • Int'l Joint Research
• [Presentation] Intra-seasonal variability of the Beaufort Gyre and its impact on the fate of Arctic Sea ice in the Pacific Sector of the Arctic Ocean (2015)
  • Author(s): Mizobata K, Kimura N
  • Organizer: European Geophysical Union General Assembly 2015
  • Place of Presentation: Austria Center Vienna, オーストリア・ウィーン
  • Year and Date: 2015-04-14
  • Int'l Joint Research