Assessing influences of river discharge on declining Arctic sea ice

• Project/Area Number: 26340018
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: PARK Hotaek 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, 主任研究員 (10647663)
• Co-Investigator(Kenkyū-buntansha): 大島 和裕 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 (40400006)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 北極の海氷減少 / 河川流出量 / 河川水の熱フラックス / 数値モデル / 海氷減少 / 分布型水文モデル / 海洋領域モデル / 河川氷 / モデル

Outline of Final Research Achievements

This study aims to evaluate quantitatively discharge and heat flux flowing from the Arctic terrestrial rivers to the Arctic Ocean and their influences on the declining Arctic sea ice. So far, studies dealt with the relationship between the declining sea ice and river discharge are rarely found. This study quantitatively evaluated changes in discharges and heat fluxes from the Arctic terrestrial rivers and also examined their influences on the retreating sea ice combining observational data and numerical model. The model simulated warming river temperature, resulting in increases in the river heat fluxes. The increased river heat fluxes did warm the surface water of the shelf sea to 1－5℃, which had a contribution rate of about 10－20% to the declining sea ice. The contribution was significant in the spring season that the spring peak discharge is appeared due to snow melted water.

Research Products

• [Int'l Joint Research] Environment of Canada(Canada)
• [Int'l Joint Research] Alfred Wegener Institute(Germany)
• [Journal Article] Active layer thickness measurements using a handheld penetrometer at boreal and tundra sites in eastern Siberia (2017)
  • Author(s): Iijima, Y., H. Park, P. Ya. Konstantinov, G. G. Pudov, A. N. Fedorov
  • Journal Title: Permafrost and Periglacial Processes Volume: - Issue: 1 Pages: 306-313
  • DOI: 10.1002/ppp.1908
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Differences in behavior and distribution of permafrost-related lakes in Central Yakutia and their response to climatic drivers (2017)
  • Author(s): Ulrich M., H. Matthes, L. Schrrmeister, H. Park, Y. Iijima, A. Fedorov
  • Journal Title: Water Resources Research Volume: 53 Issue: 2 Pages: 1167-1188
  • DOI: 10.1002/2016wr019267
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Recent interdecadal changes in the interannual variability of precipitation and atmospheric circulation over northern Eurasia. (2016)
  • Author(s): Hiyama, T., Fujinami, H., Kanamori, H., Ishige, T., Oshima, K.,
  • Journal Title: Environmental Research Letters Volume: 11 Issue: 6 Pages: 065001-065001
  • DOI: 10.1088/1748-9326/11/6/065001
  • Peer Reviewed
• [Journal Article] Enhanced diapycnal mixing due to near-inertial internal waves propagating through an anticyclonic eddy in the ice-free Chukchi Plateau (2016)
  • Author(s): Yusuke Kawaguchi, Shigeto Nishino, Hiroki Takeda, Inoue Jun, Maeno Katsuhisa, Kazuhiro Oshima
  • Journal Title: Journal of Physical Oceanography Volume: 46 Issue: 8 Pages: 2457-2481
  • DOI: 10.1175/jpo-d-15-0150.1
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Quantification of warming climate-induced changes in terrestrial Arctic river ice thickness and phenology (2016)
  • Author(s): Park, H., Y. Yoshikawa, K. Oshima, Y. Kim, N.-D. Thanh, J. Kimball, and D. Yang
  • Journal Title: Journal of Climate Volume: 29 Issue: 5 Pages: 1733-1754
  • DOI: 10.1175/jcli-d-15-0569.1
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments (2016)
  • Author(s): Park, H., Y. Kim, and J. Kimball
  • Journal Title: Remote Sensing of Environment Volume: 175 Pages: 349-358
  • DOI: 10.1016/j.rse.2015.12.046
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Enhancement of Arctic storm activity in relation to permafrost degradation in eastern Siberia (2016)
  • Author(s): Iijima, Y., T. Nakamura, H. Park, Y. Tachibana, and A. Fedorov
  • Journal Title: International Journal of Climatology Volume: - Issue: 13 Pages: 4265-4275
  • DOI: 10.1002/joc.4629
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The GRENE-TEA Model Intercomparison Project (GTMIP): overview and experiment protocol for Stage 1 (2015)
  • Author(s): S. Miyazaki, K. Saito, J. Mori, T. Yamazaki, T. Ise, H. Arakida, T. Hajima, Y. Iijima, H. Machiya, T. Sueyoshi, H. Yabuki, E. J. Burke, M. Hosaka, K. Ichii, H. Ikawa, A. Ito, A. Kotani, Y. Matsuura, M. Niwano, T. Nitta, R. Oishi, T. Ohta, H. Park, T. Sasai, A. Sato, H. Sato, A. Sugimoto, R. Suzuki
  • Journal Title: Geoscientific Model Development Volume: 8 Issue: 9 Pages: 2841-2856
  • DOI: 10.5194/gmd-8-2841-2015
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Climate and year-to-year variability of atmospheric and terrestrial water cycles in the three great Siberian rivers (2015)
  • Author(s): Oshima, K., Y. Tachibana, T. Hiyama
  • Journal Title: Journal of Geophysical Research: Atmospheres Volume: 未定 Issue: 8 Pages: 3043-3062
  • DOI: 10.1002/2014jd022489
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] An observation-based assessment of the influences of air temperature and snow depth on soil temperature in Russia (2014)
  • Author(s): Park, H., A. Sherstiukov, A.N. Fedorov, and I.V. Polyakov
  • Journal Title: Environmental Research Letters Volume: 9 Issue: 6 Pages: 064026-064026
  • DOI: 10.1088/1748-9326/9/6/064026
  • Peer Reviewed / Open Access
• [Journal Article] Effect of snow cover on pan-Arctic permafrost thermal regimes (2014)
  • Author(s): Hotaek Park, Alexander N. Fedorov, Mikhail N. Zheleznyak, Pavel Y. Konstantinov, John E. Walsh
  • Journal Title: Climate Dynamics Volume: 44 Issue: 9-10 Pages: 2873-2895
  • DOI: 10.1007/s00382-014-2356-5
  • Peer Reviewed
• [Journal Article] Recent air temperature changes in the permafrost landscapes of northeastern Eurasia (2014)
  • Author(s): Fedorov, A. N., R. N. Ivanova, H. Park, T. Hiyama, and Y. Iijima
  • Journal Title: Polar Science Volume: 8 Issue: 2 Pages: 114-128
  • DOI: 10.1016/j.polar.2014.02.001
  • Peer Reviewed
• [Presentation] Impacts of the Arctic river heat flux on declining sea ice (2017)
  • Author(s): Park H., H. Oshima, Y. Yoshikawa
  • Organizer: International Symposium on the Cryosphere in a Changing Climate
  • Place of Presentation: Rutherford House, Wellington, New Zeland
  • Year and Date: 2017-02-13
  • Int'l Joint Research
• [Presentation] Climate warming induced changes in terrestrial Arctic river ice thickness and phenology (2016)
  • Author(s): Park H., D. Yang
  • Organizer: AGU 2016 Fall Meeting
  • Place of Presentation: Moscone Center, San Francisco, USA
  • Year and Date: 2016-12-15
  • Int'l Joint Research / Invited
• [Presentation] Impacts of river heat flux on the declining Beaufort sea ice (2016)
  • Author(s): Park H.
  • Organizer: Annual Scientific Meeting 2016 ArcticNet
  • Place of Presentation: RBC Convention Centre, Winnipeg, Canada
  • Year and Date: 2016-12-06
  • Int'l Joint Research
• [Presentation] Climate warming induced changes in ecohydrological environment of the terrestrial Arctic (2016)
  • Author(s): Park H., Y. Yoshikawa, K. Oshima, D. Yang
  • Organizer: IXth International Symposium, Yakutsk, 2016
  • Place of Presentation: IBPC, Yakutsk, Russia
  • Year and Date: 2016-11-02
  • Int'l Joint Research
• [Presentation] Influence of Okhotsk high on spring river discharge in eastern Siberia (2016)
  • Author(s): Oshima, K., H. Park, Y. Yoshikawa
  • Organizer: 2nd International congress on water
  • Place of Presentation: Centro Cultural Marcos Valcarcel, Ourense, Spain
  • Year and Date: 2016-10-27
  • Int'l Joint Research
• [Presentation] Model assessment of influences of snow depth on pan-Arctic permafrost temperature (2016)
  • Author(s): Park H., A. Fedorov, P. Konstantinov
  • Organizer: International Conference of Permafrost 2016
  • Place of Presentation: Kongresshotel Potsdam, Potsdam, Germany
  • Year and Date: 2016-06-20
  • Int'l Joint Research
• [Presentation] A factor controlling long-term variations of the Siberian water cycles during the past two centuries (2016)
  • Author(s): Oshima, K., K. Ogata, H. Park, Y. Tachibana
  • Organizer: EGU General Assembly 2016
  • Place of Presentation: Austria Center Vienna, Vienna, Austria
  • Year and Date: 2016-04-20
  • Int'l Joint Research
• [Presentation] Permafrost vulnerability and active layer thickness increases over the high northern latitudes inferred from satellite remote sensing and process model assessments (2016)
  • Author(s): Park H., Y. Kim
  • Organizer: EGU General Assembly 2016
  • Place of Presentation: Austria Center Vienna, Vienna, Austria
  • Year and Date: 2016-04-18
  • Int'l Joint Research
• [Presentation] Design of hydrothermal and biogeochemical observation network in Northeastern Siberia (2016)
  • Author(s): Park, H., Y. Iijima, A. Fedorov
  • Organizer: Arctic Observing Summit 2016
  • Place of Presentation: University of Alaska Fairbanks, Alaska, USA
  • Year and Date: 2016-03-15
  • Int'l Joint Research
• [Presentation] Possible implications of terrestrial river discharge with Arctic coastal ice (2015)
  • Author(s): Park, H., K. Oshima, Y. Yoshikawa, D. Yang
  • Organizer: American Geophysical Union Fall Meeting 2015
  • Place of Presentation: Moscone, San Francisco, USA
  • Year and Date: 2015-12-17
  • Int'l Joint Research
• [Presentation] 北極陸域の河川氷に対する温暖化の影響 (2015)
  • Author(s): 朴 昊澤, 吉川 泰弘 , 大島 和裕
  • Organizer: 日本シベリア学会第一回研究大会
  • Place of Presentation: 北海道大学、北海道、札幌市
  • Year and Date: 2015-11-22
• [Presentation] Warming climate-derived changes in terrestrial Arctic evapotranspiration budget and the impact to hydrological cycle (2015)
  • Author(s): Park, H., K. Oshima
  • Organizer: 第６回極域科学シンポジウム
  • Place of Presentation: 国立極地研究所、東京都、立川市
  • Year and Date: 2015-11-19
• [Presentation] 東西シベリア水循環の過去200年の長期変動要因 (2015)
  • Author(s): 大島和裕, 緒方香都, 朴昊澤, 立花義裕
  • Organizer: 第6回極域科学シンポジウム
  • Place of Presentation: 国立極地研究所、東京都、立川市
  • Year and Date: 2015-11-16
• [Presentation] 北極陸域河川氷の変化に対する温暖化の影響 (2015)
  • Author(s): 朴 昊澤 , 吉川 泰弘 , 大島 和裕 , 矢吹 裕伯
  • Organizer: 雪氷研究大会
  • Place of Presentation: 信州大学、長野県、松本市
  • Year and Date: 2015-09-14
• [Presentation] Influences of the changing Arctic terrestrial freshwater on Arctic sea ice (2015)
  • Author(s): Park, H., K. Oshima, Y. Yoshikawa, and D. Yang
  • Organizer: 26th General Assembly of the International Union of Geodesy and Geophysics (IUGG 2015)
  • Place of Presentation: Prague Congress Center, Prague, Czech Republic
  • Year and Date: 2015-06-26
  • Int'l Joint Research
• [Presentation] A factor controlling long-term variations of the Siberian river discharges during the past two centuries (2015)
  • Author(s): Oshima, K., K. Ogata, H. Park and Y. Tachibana
  • Organizer: 26th General Assembly of the International Union of Geodesy and Geophysics (IUGG 2015)
  • Place of Presentation: Prague Congress Center, Prague, Czech Republic
  • Year and Date: 2015-06-23
  • Int'l Joint Research
• [Presentation] シベリア河川流量の長期変動とその要因 (2015)
  • Author(s): 大島和裕，緒方香都，朴昊澤，立花義裕
  • Organizer: 日本気象学会2015年度春季大会
  • Place of Presentation: つくば国際会議場、茨城県、つくば市
  • Year and Date: 2015-05-22
• [Presentation] Epoch differences in water cycles in eastern and western Siberia during the past two centuries (2015)
  • Author(s): Oshima, K., K. Ogata, H. Park and Y. Tachibana
  • Organizer: The Fourth International Symposium on the Arctic Research (ISAR-4)
  • Place of Presentation: Toyama International Conference Center, Toyama, Toyama
  • Year and Date: 2015-04-28
  • Int'l Joint Research
• [Presentation] Increases in pan-Arctic river water temperature and heat flux to the Arctic Ocean (2015)
  • Author(s): Park, H., K. Oshima, Y. Yoshikawa, D. Yang
  • Organizer: The Fourth International Symposium on the Arctic Research (ISAR-4)
  • Place of Presentation: Toyama International Conference Center, Toyama, Toyama
  • Year and Date: 2015-04-28
  • Int'l Joint Research
• [Presentation] Model assessment for changing terrestrial processes over pan-Arctic region (2015)
  • Author(s): Park, H., Y. Iijima
  • Organizer: PEEX Science Conference
  • Place of Presentation: Helsinki, Finland
  • Year and Date: 2015-02-10 – 2015-02-13
• [Presentation] Variability of ice sheet thickness and water temperature in Arctic major rivers (2014)
  • Author(s): Park, H., Y. Yoshikawa, K. Oshima
  • Organizer: 2014 AGU Fall meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] Epoch difference in water cycle in Siberia: Long-term variation of the Lena River discharge (2014)
  • Author(s): Oshima, K.., K. Ogata, H. Park, Y. Tachibana
  • Organizer: 2014 AGU Fall meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] A retrospective analysis of snow-cover impacts on permafrost thermal regimes (2014)
  • Author(s): Hotaek Park, Alexander N. Fedorov
  • Organizer: Arctic Change 2014 Conference
  • Place of Presentation: Ottawa, Canada
  • Year and Date: 2014-12-08 – 2014-12-12
• [Presentation] 北極大河川の氷厚と水温環境の変化 (2014)
  • Author(s): 朴昊澤，吉川泰弘，大島和裕
  • Organizer: 日本気象学会2014年秋季大会
  • Place of Presentation: 福岡国際会議場（福岡県、福岡市）
  • Year and Date: 2014-10-21 – 2014-10-23
• [Presentation] Model assessment for changing interaction of snow-permafrost (2014)
  • Author(s): Hotaek Park, Alexander N. Fedorov
  • Organizer: 4th European Conference on Permafrost
  • Place of Presentation: Evora, Portugal
  • Year and Date: 2014-06-18 – 2014-06-21
• [Presentation] Effect of snow depth on pan-Arctic permafrost thermal regimes (2014)
  • Author(s): 朴 昊澤、Alexander N. Fedorov, John E. Walsh
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜（神奈川県、横浜市）
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] 年代によって異なる東西シベリアの水循環 (2014)
  • Author(s): 大島和裕，緒方香都，朴昊澤，立花義裕
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜（神奈川県、横浜市）
  • Year and Date: 2014-04-28 – 2014-05-02
• [Book] 気象研究ノート第230号ー陸面過程モデルによる北極陸面プロセスの変化の評価 (2014)
  • Author(s): 朴昊澤
  • Total Pages: 16
  • Publisher: 日本気象学会
• [Book] 気象研究ノート第230号ーシベリア域における大気陸域水循環 (2014)
  • Author(s): 大島和裕
  • Total Pages: 15
  • Publisher: 日本気象学会
• [Remarks] 北極環境変動総合研究センター
  • URL: http://www.jamstec.go.jp/iace/j/