Dynamical downscaling of future sea-level change in the western North Pacific using ROMS

• Material Type: 博士論文
• Title: Dynamical downscaling of future sea-level change in the western North Pacific using ROMS
• Author/Editor: 劉, 昭君
• Author Heading: 劉, 昭君
• Publication, Distribution, etc.: Hokkaido University
• Publication Date: 2016-03-24
• Publication Date (W3CDTF): 2016-03-24
• Alternative Title: ROMSを用いた力学的ダウンスケーリングによる北西太平洋の将来海面高度変化の予測
• Contributor: 見延, 庄士郎; 古屋, 正人; 稲津, 將; 佐々木, 克徳; Hanna, Na; 鈴木, 立郎
• Degree grantor/type: 北海道大学
• Date Granted: 2016-03-24
• Date Granted (W3CDTF): 2016-03-24
• Dissertation Number: 甲第12241号
• Degree Type: 博士(理学)
• Conferring No. (Dissertation): 甲第12241号
• Text Language Code: eng
• NDC: 400
• Target Audience: 一般
• Note (General): The future regional sea-level (RSL) rise in the western North Pacific is investigatedby dynamical downscaling with the Regional Ocean Modeling System (ROMS) with aneddy-permitting 0.25° resolution based on three Coupled Model Intercomparison ProjectPhase 5 (CMIP5) climate models— MIROC-ESM, CSIRO-Mk3.6.0, and GFDL-CM3—under the highest greenhouse-gas emission Representative Concentration Pathway (RCP)8.5 scenario. The dynamical downscaling is performed for two epochs, historical run(1950–2000) and future run (2051–2100). The historical run, ROMS-Hist, is forced withthe air-sea fluxes calculated from Coordinated Ocean Reference Experiment version 2(COREv2). Three future runs— ROMS-MIROC, ROMS-CSIRO, and ROMS-GFDL—are forced with an atmospheric field constructed by adding the difference between theclimate model parameters for the 21st and 20th century to the forcing fields in ROMS-Hist.The downscaled future RSLs commonly exhibit strong, bullseye-like RSL risemaxima centered on 41°N, 142°E to the east of the Tsugaru Strait, and three zonallyaligned maxima along 37°N between 140°E and 160°E. In all ROMS downscaling, theRSL rise along the eastern coast of Japan is generally one-third or less of the RSL risemaxima off the eastern coast of Japan. The projected regional (total) sea level rises alongHonshu coast during 2081–2100 relative to 1981–2000 are 22–29 (101–108), 8–15 (73–80), and 8–18 (80–90) cm in ROMS-MIROC, ROMS-CSIRO, and ROMS-GFDL,respectively. The largest downscaled RSL rise along the Japan coast occurs at the Sanrikucoast in all models. Although the CMIP5 models substantially underestimate the maximaof the offshore RSL rise compared with the ROMS downscaling, the discrepancies of theRSL rise along the Honshu coast between the climate models and ROMS downscalingare less than 10 cm. The maxima of the RSL rise to the east of the Tsugaru Strait andthose along 37°N are probably related to the enhanced northward intrusion of theKuroshio Current along the eastern coast of Japan and to the northward shift of theKuroshio Extension, respectively. The projected RSL change along Hokkaido coastduring 2081–2100 relative to 1981–2000 is smaller than that on Honshu coast. AtOkinawa Island, RSL changes are nearly 30 cm in ROMS-MIROC and ROMS-CSIRO,which is higher than those along Honshu. The difference of RSL rise at Okinawa Islandbetween ROMS-CSIRO and CSIRO-Mk3.6.0 exceeds 10 cm.ROMS-MIROC and ROMS-GFDL simulations suggest that the RSL changes arelikely induced by wind stress changes rather than heat or freshwater fluxes at the surface,whereas ROMS-CSIRO suggests that heat and freshwater fluxes play relatively largerroles than other two models. All ROMS simulations commonly show that thethermosteric components give the major features of regional dynamic height (RDH) andthus major regional sea-level changes, while halosteric components contribute to yieldoverall meridional gradients in regional sea-level changes.; (主査) 教授 見延 庄士郎, 教授 古屋 正人, 准教授 稲津 將, 講師 佐々木 克徳, 助教 Na Hanna, 技術研究員 鈴木 立郎 （国立研究開発法人・海洋研究開発機構）; 理学院（自然史科学専攻）
• DOI: 10.14943/doctoral.k12241; https://doi.org/10.14943/doctoral.k12241
• Persistent ID (NDL): info:ndljp/pid/9984726; https://dl.ndl.go.jp/pid/9984726
• Collection: 障害者向け資料
• Collection (Materials For Handicapped People:1): テキストデータ
• Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2016-06-03T01:05:16+09:00
• Date Created (W3CDTF): 2016-03
• Format (IMT): PDF
• Access Restrictions: 国立国会図書館内限定公開
• Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
• Availability of remote photoduplication service: 可
• Periodical Title (URI): http://dx.doi.org/10.14943/doctoral.k12241; http://hdl.handle.net/2115/61708
• Is Referenced By (URI): http://hdl.handle.net/2115/61709
• Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

• Summary, etc.: The future regional sea-level (RSL) rise in the western North Pacific is investigatedby dynamical downscaling with the Regional Ocean Modeling System ...