Study of sea-ice and oceanic variability off the northern Alaskan coast
Project/Area Number |
15H03721
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Meteorology/Physical oceanography/Hydrology
|
Research Institution | Hokkaido University |
Principal Investigator |
|
Co-Investigator(Kenkyū-buntansha) |
大島 慶一郎 北海道大学, 低温科学研究所, 教授 (30185251)
伊東 素代 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, 技術研究員 (60373453)
|
Research Collaborator |
Pnyushkov Andrey
Hirano Daisuke
|
Project Period (FY) |
2015-04-01 – 2019-03-31
|
Project Status |
Completed (Fiscal Year 2018)
|
Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2017: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
|
Keywords | 北極海 / 海氷 / 係留観測 / 現場観測 |
Outline of Final Research Achievements |
Time-series data of sea-ice thickness have been accumulated for eight years by the mooring observation conducted in the coastal region off northern Alaska. We revealed that large yearly variability in ice thickness is caused by variability in sea-ice drift pattern associated with local winds.
Based on time-series oceanic data, we showed that the generation and maintenance of the coastal polynya in this region are governed by not only offshore sea-ice drift but upwelled warm subsurface water, and winter water formed in this region is influenced by not only Pacific-origin water but also Atlantic-origin water.
|
Academic Significance and Societal Importance of the Research Achievements |
海氷の面積や拡がりは人工衛星によって正確に観測できるが、厚さについては衛星によって十分な精度と頻度で観測するのはまだ困難なのが現状である。北極海全体などの大きなスケールで海氷厚の実態を把握するには、衛星観測が不可欠であるが、その精度を向上させるためには、現場における検証データを取得することが重要である。本研究では、まだまだ不足している海氷厚のデータを継続的に取得している点に意義があり、その成果は将来的な航路利用などにも資するものであると言える。
|
Report
(5 results)
Research Products
(75 results)
-
-
-
-
-
-
-
[Journal Article] Seasonal to mesoscale variability of water masses and atmospheric conditions rn Barrow Canyon, Chukchi Sea2019
Author(s)
Pickart, R. S., C. Nobre, P. Lin, K. R. Arrigo, C. J. Ashjian, C. Berchok, L. W. Cooper, J. M. Grebmeier, I. Hartwell, J. He, M. Itoh, T. Kikuchi, S. Nishino, and S. Vagle
-
Journal Title
Deep-Sea Research Part II: Topical Studies in Oceanography
Volume: 印刷中
Related Report
Peer Reviewed / Int'l Joint Research
-
-
-
[Journal Article] Winter water formation in coastal polynyas of the eastern Chukchi shelf: Pacific and Atlantic influences2018
Author(s)
Hirano, D., Y. Fukamachi, K. I. Ohshima, E. Watanabe, A. R. Mahoney, H. Eicken, M. Itoh, D. Simizu, K. Iwamoto, J. Jones, T. Takatsuka, T. Kikuchi, and T. Tamura
-
Journal Title
Journal of Geophysical Research
Volume: 123
Issue: 8
Pages: 5688-5705
DOI
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
[Journal Article] CO2 flux over young and snow-covered Arctic pack ice in winter and spring.2018
Author(s)
Nomura, D., M. A. Granskog, A. Fransson, M. Chierici, A. Silyakova, K. I. Ohshima, L. Cohen, B. Delille, S. R. Hudson, and G. S. Dieckmann
-
Journal Title
Biogeosciences
Volume: 15
Issue: 11
Pages: 3331-3343
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
-
-
-
-
-
-
[Journal Article] Landfast sea ice breakouts: Stabilizing ice features, oceanic and atmospheric forcing at Barrow, Alaska2016
Author(s)
Jones, J., H. Eicken, A. Mahoney, Rohith MV, C. Kambhamettu, Y. Fukamachi, K. I. Ohshima, J. C. George
-
Journal Title
Continental Shelf Research
Volume: 126
Pages: 50-63
DOI
Related Report
Peer Reviewed / Int'l Joint Research
-
[Journal Article] A wind-driven, hybrid latent and sensible heat coastal polynya off Barrow, Alaska2016
Author(s)
Hirano, D., Y. Fukamachi, E. Watanabe, K. I. Ohshima, K. Iwamoto, A. Mahoney, H. Eicken, D. Shimizu, and T. Tamura
-
Journal Title
Journal of Geophysical Research
Volume: 121
Issue: 1
Pages: 980-997
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
-
[Journal Article] Water properties, heat and volume fluxes of Pacific water in Barrow Canyon during summer 20102015
Author(s)
Itoh, M., R. S. Pickart, T. Kikuchi, Y. Fukamachi, K. I. Ohshima, D. Simizu, K. R. Arrigo, S. Vagle, J. Heg, C. Ashjian, J. T. Mathis, S. Nishino, and C. Nobre
-
Journal Title
Deep-Sea Research I
Volume: 102
Pages: 43-54
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
-
[Journal Article] Taking a look at both sides of the ice: comparison of ice thickness and drift speed as observed from moored, airborne and shore-based instruments near Barrow, Alaska2015
Author(s)
Mahoney, A. R., H. Eicken, Y. Fukamachi, K. I. Ohshima, D. Simizu, C. Kambhamettu, R. MV, S. Hendricks, and J. Jones
-
Journal Title
Annals of Glaciology
Volume: 56
Issue: 69
Pages: 363-372
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Sea ice as a record of freshwater fluxes: a comparison of isotopic composition near an Antarctic ice shelf and off the Alaskan coast2016
Author(s)
Inga J. Smith, Alexander J. Gough, Patricia J. Langhorne, Hajo Eicken, Andrew R. Mahoney, Gregory H. Leonard, Robert Van Hale, Yasushi Fukamachi, Stefan Jendersie, Joshua Jones, Timothy G. Haskell
Organizer
IGS International Symposium on Interactions of Ice Sheets and Glaciers with the Ocean
Place of Presentation
La Jolla (USA)
Year and Date
2016-07-12
Related Report
Int'l Joint Research
-
-
-
-
-
[Presentation] Spatio-temporal variations of stratification and its factors in the Chukchi Sea2016
Author(s)
Onuka, M., Ueno, M., Itoh, M., Kikuchi, T., Nishino, S., Watanabe, E., Hirawake, T., Yamamoto-Kawai, M., and Mizobata, K.
Organizer
2015 Ocean Sciences Meeting
Place of Presentation
ニューオーリンズ(アメリカ合衆国)
Year and Date
2016-02-25
Related Report
Int'l Joint Research
-
[Presentation] Validation of AMSR-E thin ice algorithm based on moored ice profiling sonar measurement2016
Author(s)
Fukamachi, Y., Ohshima, K. I., Iwamoto, K., Tamura, T., Nihashi, S.
Organizer
Workshop on satellite data for Arctic research and applications, Side event during Arctic Frontiers 2016
Place of Presentation
トロムソ(ノルウェー)
Year and Date
2016-01-27
Related Report
Int'l Joint Research
-
-
-
-
[Presentation] Sea ice formation on continental shelves: a comparison of water mass signals near an Antarctic ice shelf and off the Alaskan coast2015
Author(s)
Smith, I. J., Gough, A. J., Langhorne, P. J., Eicken, H., Mahoney, A. R., Leonard, G. H., Van Hale, R., Fukamachi, Y., Jendersie, S., Jones, J., Haskell, T. G.
Organizer
IGS International Symposium on Contemporary Ice-Sheet Dynamics
Place of Presentation
ケンブリッジ(イギリス)
Year and Date
2015-08-08
Related Report
Int'l Joint Research
-
[Presentation] A wind-driven, hybrid latent and sensible heat coastal polynya at Barrow, Alaska2015
Author(s)
Hirano, D., Fukamachi, Y., Watanabe, E., Iwamoto, K., Mahoney, A. R., Eicken, H., Simizu, D., Ohshima, K. I., and Tamura, T.
Organizer
26th IUGG General Assembly 2015
Place of Presentation
プラハ(チェコ)
Year and Date
2015-06-27
Related Report
Int'l Joint Research
-
[Presentation] Sediment upward dispersion and frail ice formation by strong wnd events -A possible mechanism of iron supply to sea ice2015
Author(s)
Ito, M., Ohshima, K. I., Nishioka, J., Kusumoto, Y., Mizuta, G., Fukamachi, Y.
Organizer
2015 ESSAS Annual Science Meeting
Place of Presentation
シアトル(アメリカ合衆国)
Year and Date
2015-06-17
Related Report
Int'l Joint Research
-
-
[Presentation] A wind-driven, hybrid latent and sensible heat coastal polynya at Barrow, Alaska2015
Author(s)
Hirano, D., Fukamachi, Y., Watanabe, E., Iwamoto, K., Mahoney, A. R., Eicken, H., Simizu, D., Ohshima, K. I., and Tamura, T.
Organizer
Fourth International Symposium on the Arctic Research (ISAR-4)
Place of Presentation
富山国際会議センター(富山県富山市)
Year and Date
2015-04-28
Related Report
Int'l Joint Research
-
[Presentation] SIZONet: Multi-purpose, multi-platform observations to inform responses to an Arctic sea ice cover in transformation2015
Author(s)
Eicken, H., Mahoney, A. R., Dammann, D. O., Jones, J., Hendricks, S., Fukamachi, Y., Ohshima, K. I., Haas, C., Gerland, S., Makshtas, A.
Organizer
Fourth International Symposium on the Arctic Research (ISAR-4)
Place of Presentation
富山国際会議センター(富山県富山市)
Year and Date
2015-04-28
Related Report
Int'l Joint Research
-
[Presentation] Characteristics of sea-ice draft revealed by a moored ice-profiling sonar in the Chukchi Sea off Barrow, Alaska2015
Author(s)
Fukamachi. Y., Simizu, D., Ohshima, K. I., Iwamoto, K., Eicken, H., Mahoney, A. R.
Organizer
Fourth International Symposium on the Arctic Research (ISAR-4)
Place of Presentation
富山国際会議センター(富山県富山市)
Year and Date
2015-04-28
Related Report
Int'l Joint Research
-
-
-