간행물
한국지구과학회지 KCI 등재 The Journal of The Korean Earth Science Society
- 발행기관 한국지구과학회
- 자료유형 학술지
- 간기 격월간
- ISSN 1225-6692 (Print)2287-4518 (Online)
- 수록기간 1979 ~ 2024
- 주제분류 자연과학 > 지구과학 자연과학 분류의 다른 간행물
- 십진분류KDC 450DDC 550
권호리스트/논문검색
제9권 제1호 (1988년 6월) 7건
1.
1988.06
구독 인증기관 무료, 개인회원 유료
The characteristics of the anomaly level, variability and distribution of monthly mean precipitation have been investigated at 4 different weather stations on Cheju Island, Korea. The results of this study are as follows : 1) The SE area of Cheju Island turns out to be the heavy rain area from February to July than the NW area of the island. The heavy rain area migrates from the SE area to the NE area during the period from August to January. 2) The rainy season, in which monthly mean precipitation is more than 180mm, appears in Cheju City and Sungsan from June to August, in Seoguipo from April to August, and in Daejung from June to July. On the other hand, the dry season, in which monthly mean precipitation is less than 100㎜, appears in Cheju City from October to May, in Sungsan from December to February in Seoguipo from October to February, and in Daejung from October to March. 3) The variability of precipitation on Cheju Island appears high during the 'Changma' spell and it is also high in autumn, particularly in October, and appears low in March and April. 4) The frequency of the anomaly level shows maximum not only on the normal level but the lower normal level and the upper normal level in monthly precipitation. The annual frequency distribution of each anomaly level shows maximum on the normal level, and the frequency of the lower normal level is a lot higher than the lower normal level. 5) The precipitation of the summer season acts as an important variable in deciding between the dry year and the moisture year. In particular, this applies to the large precipition of June in the moisture year and the small precipitation of July and August in the dry year.
4,600원
2.
1988.06
구독 인증기관 무료, 개인회원 유료
The effective temperatures and the bolometric corrections of 0-G type stars and derived from de-reddened monochrometric and integrated fluxes obtained by absolute spectrophotometry on the ground and satellite (IUE, 1985, OAO : Code and Meade, 1979 ; Code et al., 1980), using the method simillar to that of Code et al.(1976) with the LTE model atmospheres by Kurucz(1979). The effective temperatures and the bolometric corrections derived from this work are found to be in good agreement with those of Code et al. (1976), Morossi and Malagnini (1985), Malagnini et al. (1985) etc., being significant for basic astrophysical quantities.
4,300원
3.
1988.06
구독 인증기관 무료, 개인회원 유료
The plate tectonics is the theory which can systematically interpret various kinds of changes of crusts on the earth surfaces. If the concepts of this theory is taken a triangular position and systematically played up at the curricula of the earth science in the high school, this theory may be able to become the most adequate subject for students to interest in the earth science. The aim of this study is the making out the expanded model of the unit of plate tectonics for the purpose of the more effective teaching-learning of the plate tectonics and the improvement of curricula on the plate tectonics in the high school.
5,100원
4.
1988.06
구독 인증기관 무료, 개인회원 유료
1) 洛東江 河口둑 斷面績 堆積物의 堆積相과 粒廣分析에 의하면 -20m∼-50m 以下의 礫質 堆積物은 洪績世의 河川堆積物로, 그리고 그 上位의 砂泥質 堆積物은 現世의 混成環境 堆積物로 밝혀졌다. 2) 洛東三角洲 一帶 水域에 대한 水底地質圖가 作成되었으며 構成堆積物은 sand, muddy sand, sandy mud, 및 mud이다. 본 資料는 浚渫工事의 基礎가 된다. 試料採取는 skin SCUBA diving에 의한 直接採取였다. 3) 洛東三角洲 一帶 水域의 echo sounding으로 調査된 水深은 最大 17m에 達한다. 4) 音響測深에 의한 洛東三角洲 水域의 水底起伏(bottom configuration)은 下流로 갈수록 水深이 반드시 增加하는 것이 아니라 上部 三角洲 水域의 水深이 下部보다 더 깊은 곳도 있어 流路를 따라 <도형생략>이 있음이 確認되었다. 5) 洛東三角洲의 下部에는 4∼5個의 潮汐砂洲(tidal bars)가 발달하며 본 삼각주는 潮流優勢三角洲(tide-dominant delta)로 밝혀졌다. 6) 洛東江 盆地 南部의 地質은 先白堊紀 基盤巖, 前期 白堊紀 洛東流, 後期白堊紀 佛國寺統, 現世의 沖積層으로 構成된다. 7) 洛東三角洲의 造構環境은 Sino-Korea Block(中國-韓國 地塊) 內의 安全塊 위에 位置하나 地體 構造上 Sikhote-Alin Block의 中央에 위치하는 慶尙盆地 東南端의 본 河口둑지점은 梁山斷層이 通過하므로 地震安全度의 長期的 測定이 必要하다. 8) 洛東三角洲의 堆積相 分析에 의하면 洛東三角洲의 中心部는 沈降現象을 일으켰으며 造構環境이 安定되고 海水準이 靜的으로 上昇하는 河口地域에서 三角洲가 形成되었다. 9) 洛東三角洲 堆積物 內에 發達하는 成長斷層, 崩落斷層의 斷層系를 두明하여 河口둑의 安全을 圖謀해야 한다. 10) 洛東三角洲 水域에 대한 11種의 貝類는 skin SCUBA diving으로 수집되었으며 一部는 水中 video로 觀察되었다. 先端砂洲에서는 새 발자국 標本이 採取되었다. 11) 自然環境에 대한 洛東江 河口둑의 影響 ① 汽水域, 潮間帶, 砂洲 및 河岸 低濕地 地域의 減少를 招來했으나 淡水湖가 創出됨으로써 淡水域이 確保되었고 高水數地가 確保되었다. ② 湖底에 堆積作用 增加 ③ 三角洲 一帶의 洪水 危險度 增加 ④ 下部 三角洲의 波蝕作用 激增 ⑤ 河口둑의 地質地盤 安定性에 영향 ⑥ 産業개발에 附隨하여 食水源의 長期的 汚染 ⑦ 騷音, 振動, 風廛 및 大氣汚染公害 12) 管理指針 : 河口둑의 管理指針과 三角洲 一帶의 地質學的 公害의 低減策은 아래와 같다. ① 河口湖 低質物의 浮游度를 높여 自然排出의 效率化를 爲한 적절한 水門調節 및 裝置 ② 洪水災害 豫防을 위해 兩岸堤坊의 補完 그리고 三角洲 末端과 構造物 保護를 위한 防波堤 建設 ③ 河口둑 堆積物 地盤의 安定性 維持 ④ 河口湖의 淡水維持 및 汚染低減策 請究를 爲한 探査 ⑤ 自然災害 및 公害 低減策 請究를 爲한 探査 ⅰ) 河口湖에 流入되는 運搬物質의 直接 測定 ⅱ) 水準測量, 水中測量 및 航空測量 ⅲ) 地球物理探査 ⅳ) 水底堆積物, 河底形態, 底棲生態界의 水中 video 撮影을 通한 分析 ⅴ) 水底堆積物의 化學的 및 鑛化學的 分析 ⑥ 洛東江 河口湖의 管理는 水中 video 觀察로 完璧을 기한다. ⑦ 東洋最大의 철새도래지가 破壞되고 있으므로 自然保護의 標本이 되겠끔 주남 저수지와 같은 새로운 철새도래지를 마련해주거나 철새 移住를 誘導하지 않으면 안된다.
6,300원
5.
1988.06
구독 인증기관 무료, 개인회원 유료
A power spectral analysis is made seasonally for the data of daily mean temperature and pressure at Seoul(37°34'N, 126°58'E), Chupungnyong(36°13'N, 128°00'E), Kwangju(35°08'N, 126°55'E) from March 1961 to February 1986. The time sequences of the power spectra for the daily mean pressure show that power spectral density is generally high at the period of 20-30days and 10 days in winter, 15-20 days and 8.6 days in spring, summer and autumn. For the daily mean temperature, the power spectral density is generally lower than that of pressure and changes largely following the seasons, high in winter and low in summer. The time sequences of the' power spectra are much the same pattern as that of pressure in spring and autumn, but in winter show high power spectral density at the period of 5.5-7.5 days, much the same period as '3 cold days and 4 warm days' which is the popular weather lore on the winter temperature fluctuations in Korea. Judging from the phase differences between observation stations of temperature and pressure changes, which is less than 20 degrees, the phase changes of temperature occurs in sequence of Seoul, Chupungnyong, Kwangju and in case of pressure much the same as in the temperature at the period of above 15 days, but below the period of about 15 days in the opposite sequence. The correlations between the interannual changes of seasonal mean of weather elements and the power spectral density at each period are investigated to show that the positive correlation is between the power spectral density at the period of above 20 days and temperature in summer, that at below 4.5 days and precipitation in spring, that at below 6.7 days and temperature in winter.
4,000원
6.
1988.06
구독 인증기관 무료, 개인회원 유료
We study the luminosity and mass functions of open clusters using the data published by the United States Navel Observatory to figure out the relationships between these functions and the cluster ages. Slope ranges of the luminosity (dlogN/dMv) and mass function (-dlogN/d(log m/m@)) are 0.09-0.52(avg.=0.26, var.=0.01), 0.43-5.49(avg.=1.7, var.=0.63) respectively. These large ranges do not support the mass function is universal, but the function is time dependent. Despite of the poor relationship between the luminosity function and the cluster age, we obtain a good relationship in the mass function. We can understand this good relationship with a viewpoint of stellar evolution. We do age analyses in terms of the metal abundance and the number density of the open clusters. We get the fact that the less metal abundances and the less number densities, the more steep in the slopes of the mass function.
5,400원
7.
1988.06
구독 인증기관 무료, 개인회원 유료
The structure and change of the salinity front formed by the outflow of Keum River into the adjacent sea is investigated through the analysis of some possible data. The outflow of the river has no peculiar direction and controlled by the various factors. The analysis of data which are obtained at March and October show that at March, the salinity front is weakened as compared with October. The outflow pattern is not uniform but varies significantly with time period less than one week.
4,000원
