Ocean-atmosphere interaction over sea surface temperature front along Kuroshio Extension and North Pacific subtropical front.
沿黑潮延伸带和北太平洋副热带锋的海表温度锋面的海洋-大气相互作用。
基本信息
- 批准号:17340137
- 负责人:
- 金额:$ 10.36万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2007
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Over the western North Pacific east of the Japan, sea surface temperature (SST) shows a steep front across the Kuroshio Extension (KE). The SST gradient near the KE is 5℃/200 km through seasons, therefore changes in SST are very large in that region. In the present study, we conducted global positioning system (GPS) radio sonde atmospheric soundings across the front in July 2005 (January 2006) as a research cruise of research vessel (R/V) Roger Revelle, Scripps Institute of Oceanography (R/V Hakuho-maru, Ocean Research Institute, University of Tokyo).In early summer, whilst the lower atmosphere overlying the KE region exhibits synoptic disturbances, SST front is nearly the same for several weeks during the cruise due the large inertia of the ocean. Analyses of the atmospheric soundings and ceilometer measurement show that the vertical structure of atmospheric boundary layer is modified across the front. In case of warm/moist (cold/dry) air mass overlying the KE region, a cloud regime shift from cumulus to low-level stratus, occasionally to fog (from stratus with solid cloud deck to broken stratus scattering with lower cloud base) is observed across warm-to-cold SST.In deep winter, the near surface is always unstable because of warm ocean and cool/dry atmosphere. Hence, the main inversion is formed at the top of well-mixed layer. Temporal variation of the mixed layer top (MLT), which is mostly corresponding to the observed cloud base, is well correlated with surface heat flux. The lag correlation becomes the maximum when the flux leads by 5-12 hours the MLT. After a passage of synoptic storm, the surface heat flux occasionally exceeded 800W m^<-2> and thereby the stratus and stratocumulus were formed at the MLT.These observational findings indicate that the marine atmospheric boundary layer is modified by the spatial changes in SST along the KE front even though the overlying atmosphere displays its synoptic distrubances.
在日本以东的北太平洋西部,海面温度(SST)显示出横跨黑潮延伸带(KE)的陡峭锋面。 KE附近的海温梯度为5℃/200 km,季节变化较大,因此该地区海温变化较大。在本研究中,我们于 2005 年 7 月(2006 年 1 月)作为斯克里普斯海洋学研究所的罗杰·雷维尔研究船(R/V Hakuho-maru,东京大学海洋研究所)的研究巡航,对锋面进行了全球定位系统(GPS)无线电探空仪大气探测。初夏,当覆盖 KE 区域的低层大气表现出天气扰动时,海温锋面 由于海洋的巨大惯性,航行期间的几个星期几乎没有变化。大气探测和云高仪测量的分析表明,大气边界层的垂直结构在锋面发生了变化。在暖/湿(冷/干)气团上覆KE区域的情况下,在暖海温到冷海温的范围内观察到云态从积云转变为低层层云,偶尔转变为雾(从具有坚实云层的层云到具有较低云底的破碎层云)。在深冬,由于温暖的海洋和凉爽/干燥的大气,近地表总是不稳定。因此,主要反转形成在充分混合层的顶部。混合层顶部(MLT)的时间变化主要对应于观测到的云底,与地表热通量密切相关。当通量超前 MLT 5-12 小时时,滞后相关性变得最大。经过一次天气风暴后,地表热通量偶尔会超过800W m^-2>,从而在MLT处形成层云和层积云。这些观测结果表明,尽管上覆大气显示出天气扰动,但海洋大气边界层仍受到KE锋面海温空间变化的修正。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
北太平洋十年規模変動:黒潮・親潮続流域の大気海洋相互作用に注目して
北太平洋年代际波动:关注黑潮-亲潮伸展盆地的大气-海洋相互作用
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:C. Bueh;H. Nakamura;西井和晃・中村 尚;野中正見・谷本陽一・中村 尚
- 通讯作者:野中正見・谷本陽一・中村 尚
気候変動における環オホーツク地域の重要性
环鄂霍茨克地区在气候变化中的重要性
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:C. Bueh;H. Nakamura;西井和晃・中村 尚;野中正見・谷本陽一・中村 尚;中村 尚・本田明治・高谷康太郎
- 通讯作者:中村 尚・本田明治・高谷康太郎
Structure and dynamics of the summertime Pacific-Japan (PJ) teleconnection pattern
夏季太平洋-日本(PJ)遥相关模式的结构和动态
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Kosaka;Y.;H. Nakamura
- 通讯作者:H. Nakamura
中緯度海洋水温フロントと大気境界層に関する観測的研究
中纬度海洋温度锋和大气边界层观测研究
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:中村 尚;三瓶岳昭;後藤敦史;堀田大介;野中正見;谷本陽一;謝 尚平;小橋史明・谷本陽一・村山利幸・岩坂直人・時長宏樹・野中正見・根田昌典;谷本陽一
- 通讯作者:谷本陽一
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TANIMOTO Youichi其他文献
TANIMOTO Youichi的其他文献
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Surface wind adjustment and its feedback to the ocean surface layers over the gyre boundary regions
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$ 10.36万 - 项目类别:
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- 批准号:
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15540416 - 财政年份:2003
- 资助金额:
$ 10.36万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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