首页> 外文期刊>海洋理工学会誌 >エルニーニョ•ラニーニヤ現象時における全球規模大気•海洋間運動量フラックスの相違の評価
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エルニーニョ•ラニーニヤ現象時における全球規模大気•海洋間運動量フラックスの相違の評価

机译:厄尔尼诺-拉尼娜事件期间全球大气与海洋动量通量差异的评估

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摘要

気候変動の予測を行う際,大気•海洋間での乱流輸送 現象である物質•熱•運動量輸送を正確に評価する必要 がある.特に,大気•海洋間運動量輸送は,風波や海洋 循環などの主な駆動源であり,物質•熱輸送を促進させ る作用もあるため,予測精度向上に重要である.%The drag coefficient is very important parameter that is used to calculate the air-sea momentum flux. Although the many estimation models of the drag coefficient have been proposed and discussed (conditions with extreme wind, wind wave, swell, etc.), the agreement has not reached yet. Comparison and evaluation of the model's characteristics have been performed. However, assessment related climate change has not been done. For a global phenomenon associated with climate change due to change in wind speed, we focused on the El Nino and La Nina phenomenon. In this study, using the sea surface wind data, we investigated the influence of the air-sea momentum flux estimation for the year when the phenomenon occurred and did not occur. CCMP (Cross-Calibrated Multi-Platform) of NASA was used the sea surface wind data. The period is from January to December of El Nino phenomenon, La Nina phenomenon, and normal period. Studies of Charnock (1955) and Takagaki et al.(2012) (consider the extreme wind speed range) were used for the drag coefficient model. The annual mean global air-sea momentum flux showed that the maximum and minimum air-sea momentum flux value corresponded the normal period and the El Nino phenomenon, respectively. And the difference was as small as 7.4% and 7.0% in both models. In every month, it showed the maximum and minimum is the normal period and the El Nino phenomenon in both models, and the difference was as big as approximately 13.9% and 13.8%. We also investigated the difference of the air-sea momentum flux for each phenomena in 10 degree latitude bands and the proposed seven sea areas. As a results, the difference between the maximum and the minimum value corresponded to the La Nina and EI Nino phenomenon showed approximately 18% from the north latitude 50° to the north latitude 60° in the high wind speed region. The wind speed in the North Atlntic showed that sea wind speed is a very large value for the El Nino and La Nina phenomenon. Therefore, in this region, the value of air-sea momentum flux corresponding to the El Nino and La Nina phenomenon was larger than that corresponding to the other phenomena.
机译:在预测气候变化时,有必要准确评估大气与海洋之间的湍流传输现象,即物质,热量和动量传输。阻力系数是用于计算海气动量通量的一个非常重要的参数,尽管它具有促进质量和热传递的作用,但对提高预测精度非常重要。提出并讨论了许多阻力系数估算模型(极端风,风浪,浪涌等条件下),但尚未达成共识,已对该模型的特性进行了比较和评估。气候变化尚未完成。对于由风速变化引起的与气候变化有关的全球现象,我们重点研究了厄尔尼诺现象和拉尼娜现象。在这项研究中,我们使用海表风数据调查了海平面变化的影响。发生和未发生该现象的年份的海-海动量通量估计。使用NASA的CCMP(跨校准多平台)海表风数据。该时间段是厄尔尼诺ph的1月到12月Enomenon,La Nina现象和正常时期,将Charnock(1955)和Takagaki等人(2012)(考虑极端风速范围)的研究用于阻力系数模型。最大和最小气海动量通量值分别对应于正常时期和厄尔尼诺现象,两个模型之间的差异最小为7.4%和7.0%,每个月的最大和最小值为两种模式都具有正常周期和厄尔尼诺现象,两者的差异分别约为13.9%和13.8%。我们还研究了10个纬度带中每种现象的海气动量通量的差异,并提出了七个结果,在高风速地区从北纬50°到北纬60°对应于拉尼娜现象和EI Nino现象的最大值和最小值之间的差异显示为大约18%。 ee北大西洋的d表明海风速是厄尔尼诺和拉尼娜现象的一个非常大的值,在该区域中,对应于厄尔尼诺和拉尼娜现象的海气动量通量的值大于与其他现象相对应。

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  • 来源
    《海洋理工学会誌》 |2017年第2期|1-7|共7页
  • 作者单位

    近畿大学大学院総合理工学研究科;

    〒577-8502大阪府東大阪市小若江3-4-1;

    近畿大学理工学部;

    〒577-8502大阪府東大阪市小若江3-4-1;

    兵庫県立大学工学研究科;

    〒671-2280兵庫県姫路市書写2167;

    同志社大学高機能微粒子センター;

    〒610-0394京都府京田辺巿多々羅都谷1-3,国立研究開発法人海洋研究開発機構地球情報基盤センター;

    〒236-0001神奈川県横浜市金沢区昭和町3173-25;

    近畿大学理工学部;

    〒577-8502大阪府東大阪市小若江3-4-1;

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