Papers in Meteorology and Geophysics最新文献_第9页

Attenuation Function of Displacement Amplitude for Magnitude Calculation. 用于震级计算的位移幅值衰减函数。

Papers in Meteorology and Geophysics Pub Date : 1999-01-01 DOI: 10.2467/MRIPAPERS.50.1

A. Katsumata

引用次数: 0

Source, path, and site effects estimated from S waves observed in southern Kanto, Japan. 从日本关东南部观测到的S波估计震源、路径和地点效应。

Papers in Meteorology and Geophysics Pub Date : 1999-01-01 DOI: 10.2467/MRIPAPERS.49.33

M. Hoshiba, Y. Yoshida, A. Katsumata, K. Maeda, Y. Ishikawa

引用次数: 0

An unsteady extension of Bernoulli's theorem. 伯努利定理的非定常推广。

Papers in Meteorology and Geophysics Pub Date : 1999-01-01 DOI: 10.2467/MRIPAPERS.49.29

H. Kanehisa

引用次数: 0

Asian Summer Monsoon Viewed from Energy Budget. 从能源收支看亚洲夏季风。

Papers in Meteorology and Geophysics Pub Date : 1999-01-01 DOI: 10.2467/MRIPAPERS.49.75

T. Ose

引用次数: 0

Long-Period Seismograph Magnitude of Explosion Earthquakes and B-Type Earthquakes at Sakurajima Volcano. 樱岛火山爆炸地震和b型地震的长周期地震仪震级。

Papers in Meteorology and Geophysics Pub Date : 1999-01-01 DOI: 10.2467/MRIPAPERS.49.59

T. Sakai, H. Yamasato, K. Uhira

{"title":"Long-Period Seismograph Magnitude of Explosion Earthquakes and B-Type Earthquakes at Sakurajima Volcano.","authors":"T. Sakai, H. Yamasato, K. Uhira","doi":"10.2467/MRIPAPERS.49.59","DOIUrl":"https://doi.org/10.2467/MRIPAPERS.49.59","url":null,"abstract":"長周期の地震波が卓越することの多い桜島火山の爆発地震とB型地震のマグニチュードを求めることを目的として、鹿児島地方気象台の桜島の観測点E点に長周期地震計を設置した。福岡管区気象台で震源要素が決定された一般地震のデータから、この長周期地震計の上下動成分によるマグニチュードMELVの計算式を求めたところ、MELV=logAV+1.37 logΔ+0.69 が得られた。この式は福岡管区気象台で決定されたマグニチュードとの系統的な差がなく、また M4.0 までの火山性地震に対して信頼性があると考えられる。この式を適用することにより、1996年に発生した171個の爆発地震のMELVは1.3∼3.1 に決定された。また、1996年1月に発生した120個のB型地震のMELVは0.7∼1.8に決定された。同じくE点に設置している短周期地震計の上下動成分についても同様にマグニチュード計算式を求め、爆発地震とB型地震のマグニチュードを算出し、MELVと比較したところ、MELVの方が平均してそれぞれ約0.21、約0.14大きくなった。これは、長周期成分が卓趣する爆発地震やB型地震の場合、短周期地震計では本来の振幅が得られないためである。","PeriodicalId":39821,"journal":{"name":"Papers in Meteorology and Geophysics","volume":"13 1","pages":"59-74"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69023483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transport of Sulfur Oxides over the East Asian Region by the Off-line Coupled Meteorological and Transport Model. 东亚地区硫氧化物的离线耦合气象-输送模式的输送。

Papers in Meteorology and Geophysics Pub Date : 1999-01-01 DOI: 10.2467/MRIPAPERS.50.97

J. Sato, H. Sasaki, T. Satomura

{"title":"Transport of Sulfur Oxides over the East Asian Region by the Off-line Coupled Meteorological and Transport Model.","authors":"J. Sato, H. Sasaki, T. Satomura","doi":"10.2467/MRIPAPERS.50.97","DOIUrl":"https://doi.org/10.2467/MRIPAPERS.50.97","url":null,"abstract":"A long-range sulfur transport model consisting of two submodels-a meteorological submodel and a dispersion submodel-has been developed to evaluate the extent of acid deposition in East Asia. The Japan Meteorology Agency's operational weather forecasting model was adopted and improved upon, and employed to predict meteorological variables. A Lagrangian particle method was used as the basis for the dispersion model, and a random walk calculation was used for the diffusion process. Dry deposition, below-cloud scavenging, and chemical transformation processes were also included. A numerical simulation was performed for the transport of sulfur oxides in East Asia in 1985, and the annual deposition was evaluated. The results of the simulation showed that the wet deposition of sulfur oxides originating from the Asian continent was roughly 0.05gS/m2/ year, and the dry deposition 0.02-0.17gS/m2/year. The observed wet deposition was about 1.0gS/m2/year, and although uncertain volcanic influence was included in this observed value, it was about 20 times lower than wet deposition of sulfur values observed in Japan. Calculated wet deposition values at four representative receptors were found to be much lower than observed values. Therefore, it was inferred that the contribution from foreign emission sources was extremely low, on the order of around ten percent. An evaluation of the impact of deposition in Kita-Kyushu (in western Japan) showed that emissions from South Korea, Taiwan and the southeastern region of China affected the Kita-Kyushu values. However, an evaluation of the impact of deposition in Niigata (on the Sea of Japan coast) showed that emissions from China dominated.","PeriodicalId":39821,"journal":{"name":"Papers in Meteorology and Geophysics","volume":"50 1","pages":"97-111"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69023714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Another Type of Downslope Windstorm in Smith's Model. 史密斯模型中的另一种下坡风暴。

Papers in Meteorology and Geophysics Pub Date : 1998-01-01 DOI: 10.2467/MRIPAPERS.49.1

H. Kanehisa

引用次数: 0

3-D Mountain Waves by the Lokal-Modell of DWD and the MRI Mesoscale Nonhydrostatic Model. DWD局域模式和MRI中尺度非流体静力模式的三维山波。

Papers in Meteorology and Geophysics Pub Date : 1998-01-01 DOI: 10.2467/MRIPAPERS.49.7

Kazuo Saito, G. Doms, U. Schaettler, J. Steppeler

{"title":"3-D Mountain Waves by the Lokal-Modell of DWD and the MRI Mesoscale Nonhydrostatic Model.","authors":"Kazuo Saito, G. Doms, U. Schaettler, J. Steppeler","doi":"10.2467/MRIPAPERS.49.7","DOIUrl":"https://doi.org/10.2467/MRIPAPERS.49.7","url":null,"abstract":"A brief comparison between the Deutscher Wetterdienst's next generation nonhydrostatic regional forecast model (the Local-Modell of DWD) and the Meteorological Research Institute mesoscale nonhydrostatic model (MRI-NHM) is performed by computing the numerical solutions of the 3-dimensional mountain waves over an isolated circular mountain. For linear cases with a free-slip lower boundary condition, both models well reproduce the characteristics of the Smith's (1980) analytic solutions for the 3-dimensional nonhydrostatic mountain waves. Analysis of the CPU time of the two models with the CRAY C-98 of DWD shows the tendency that the Local-Modell (time-splitting, horizontally explicit model) is relatively efficient in lower horizontal resolution while MRI-NHM (3D-implicit model) becomes more efficient at higher horizontal resolution. This is because the number of small time step integrations of the horizontally explicit model increases when the horizontal resolution becomes higher. The CPU time for one iterative procedure in the direct method for the three dimensional elliptic pressure equation in MRI-NHM is 2.1∼2.6 times of that for one small time step integration in the Lokal-Modell. A rough yardstick which determines the comparative efficiency of the two models is given by the relative magnitude between the Courant-number for sound wave speed and the number of iterative procedures in the elliptic pressure equation solver in the 3D implicit model.","PeriodicalId":39821,"journal":{"name":"Papers in Meteorology and Geophysics","volume":"49 1","pages":"7-19"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69023553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Storm Surge Simulation using POM and a Revisitation of Dynamics of Sea Surface Elevation Short-Term Variation. 基于POM的风暴潮模拟与海面高程短期变化动力学回顾。

Papers in Meteorology and Geophysics Pub Date : 1998-01-01 DOI: 10.2467/MRIPAPERS.48.79

Shinya Minato

引用次数: 8

Crustal deformation due to a pressure source with directivity. 有方向性压力源引起的地壳变形。

Papers in Meteorology and Geophysics Pub Date : 1998-01-01 DOI: 10.2467/MRIPAPERS.48.101

T. Tsukakoshi, T. Odaka

{"title":"Crustal deformation due to a pressure source with directivity.","authors":"T. Tsukakoshi, T. Odaka","doi":"10.2467/MRIPAPERS.48.101","DOIUrl":"https://doi.org/10.2467/MRIPAPERS.48.101","url":null,"abstract":"近年の伊豆半島における地殻の上下変動の図を参照すると、(1) 隆起の中心が移動すること、(2) 目玉状の振幅の大きな隆起域に隣接して小振幅の沈降域があること、など幾つか特徴的な現象が見受けられる。本研究では、指向性を有する圧力源モデルを新たに導入して、三次元有限要素法による数値解析等を行い、これらの地殻変動現象がこのモデル、あるいは球状均等圧力源モデルによって定性的に説明可能であるかの考察を行った。その結果、(1) については複数の分布した均等圧力源あるいは指向性圧力源により説明可能である。(2) についても同様である。しかし、均等圧力源モデルでは沈降域の目玉の真下に圧力源 (減圧) が存在しなければならないが、ある特定の期間に典型的に見られた上下変動パターンの場合、沈降域の目玉の付近に圧力源となる火山などは分布せず、均等圧力源では説明困難であり、指向性圧力源で説明できる可能性があることがわかった。その他、指向性圧力源は、開口断層に比べて、隆起域に隣接して生じる沈降域をより効率的に生じ得ることを示した。また、球状均等圧力源モデルに対して計算を行い、本稿で用いた数値解法の妥当性を確認するとともに、低速度表層の存在がそれの無い場合に比べて水平変位を1.3倍程増大させることなどを示した。","PeriodicalId":39821,"journal":{"name":"Papers in Meteorology and Geophysics","volume":"48 1","pages":"101-113"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69023505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0