• 한국우주과학회:학술대회논문집(한국우주과학회보)
• /
• 한국우주과학회 2006년도 한국우주과학회보 제15권2호
• /
• pp.106-106
• /
• 2006

• 한국수자원학회:학술대회논문집
• /
• 한국수자원학회 2005년도 학술발표회(2)
• /
• pp.1162-1163
• /
• 2005

• 한국우주과학회:학술대회논문집(한국우주과학회보)
• /
• 한국우주과학회 2001년도 한국우주과학회보 제10권2호
• /
• pp.65-65
• /
• 2001

• 수산해양기술연구
• /
• 제34권4호
• /
• pp.419-432
• /
• 1998

• 한국대기환경학회:학술대회논문집
• /
• 한국대기환경학회 2002년도 추계학술대회 논문집
• /
• pp.389-390
• /
• 2002

• 한국제4기학회지
• /
• 제18권2호통권23호
• /
• pp.19-22
• /
• 2004

Seasonal changes of topograpy, sediment grain size and accumulation rate on the Gomso-Bay tidal flat(Fig. 1), west coast of Korea, have studied in order to understand the seasonal accumulation pattern and preservation potential of tidal-flat sediments. Seasonal levelings across the tidal flat show that the landward movement of both intertidal sand shoals and cheiers accelerates during the winter and typhoon period, but it almost stops in summer when mud deposition is instead predominant on the middle to upper tidal flat. Seasonal variations of mean grain size were largest on the upper part of middle tidal flat where summer mud layers were eroded during the winter and typhoon periods(Fig. 2). Measurements of accululation depths from sea floor to basal plate reveal that accumulation rates were seasonally controlled according to the elevation of tidal-flat surface(Table 1) : the upper flat, where the accumulation rate of summer was generally higher than that of winter, was characterized by a continuous deposition throughout the entire year, whereas on the middle flat, sediment accumulations were concentrated in winter realtive to summer, and were intermittently eroded by typhoons. The lower tidal flat were deposited mostly in winter and eroded during summer typhoons. Cancores taken across the tidal flat reveal that sand-mud interlaers resulting from such seasonal changes of energy regime are preserved only in the upper part of the deposits and generally replaced by storm layers downcore(Fig. 3). Based on above results, it is suggested that the storm deposits formed by winter stors and typhoons would consist of the major part of the Gomso-Bay deposits(Fig. 4).

• 수면정신생리
• /
• 제12권2호
• /
• pp.111-116
• /
• 2005

목 적：기분과 행동에서의 계절적 변동에 대한 많은 연구들이 여러 국가에서 시행되었으며 한국에서도 의과대학생들을 대상으로 한 연구는 있었지만 아직 청소년들을 대상으로 한 결과는 보고되지 않았었다. 본 연구의 목표는 한국의 고등학생들에서 기분과 행동의 계절적 변동의 빈도를 평가하기 위하여 시행되었다. 방 법：서울의 남동쪽 지역에 거주하는 656명의 남녀공학 고등학교 학생들이 이 연구에 참여하였다. 연구대상자들은 계절성 양상 평가 설문지(SPAQ)의 한국어 번역판을 통하여 응답하였다. 이들에게서 계절성 정동장애(SAD)와 아임상성 계절성 정동장애(S-SAD)의 유무를 평가하기 위하여서는 Kasper가 제시한 기준에 따랐다. 결 과：결측치가 발생한 설문지를 제외하고 전체 565부의 설문지가 분석에 사용되었다. 연구에 참여한 이들의 평균 연령은 16.73(SD=0.65)세였다. 이들에서의 전반적 계절성 점수의 평균은 5.88(SD=4.72)이었다. 응답자의 73.1%는 자신들이 계절성의 변화가 생활에 영향을 미친다고 보고하였다. 전체 SAD의 유병률은 13.6%, S-SAD의 유병률은 10.8%로 나타났다. 이 중 여름철 SAD는 5.1%, 여름철 S-SAD는 3.2%였으며, 겨울철 SAD는 0.5%, 겨울철 S-SAD는 1.1%로 조사되었다. 결 론：여름철 SAD 및 S-SAD의 유병률이 겨울철보다 더 높게 나타났으며 이는 기존의 다른 아시아 국가인 중국이나 일본의 결과와 유사한 것이다. 여름 동안의 고온 다습한 날씨에서 오는 불쾌감이 결과에 영향을 미쳤을 가능성이 있다고 생각된다. 이는 SPAQ의 적용에 있어서 동아시아 국가의 기후 특성에 맞는 계절성 정동장애를 위한 새로운 기준이 필요함을 보여준다.

• Journal of the korean society of oceanography
• /
• 제32권2호
• /
• pp.63-68
• /
• 1997

Stable isotope profiles with fine-scale resolution were constructed from the fossil mollusk shells, Mercernaria mercernaria, obtained from the late Pleistocene transgressive deposits of Gomez Pit, Virginia, USA. Incremental sampling were made along the axis of maximum growth to provide high-resolution ${\delta}^{18}$O and ${\delta}^{13}$C records. The ${\delta}^{18}$O shell profiles exhibit a series of pronounced cycles in the overall amplitude, corresponding to strong seasonal variations in temperature, which is apparently positive environmental variable. Contrasts between the patterns of ${\delta}^{18}$O and ${\delta}^{13}$C profiles reflect the relationship influencing the seasonal carbon cycling in the shallow marine environment. Positive anomalies of the ${\delta}^{13}$C values during the summer were observed to be out of phase with the ${\delta}^{18}$O profile. Such relatively heavier carbon source may be alternated due to seasonal methanogenesis during the summer. A hypothesized methane-based system may be operated in the shallow and marginal marine environment, resulting in a ${\delta}^{13}$C enriched bicarbonate pool, in which the heavier isotope seems to be incorporated to the shell carbonate.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
• /
• pp.373-377
• /
• 2002

The Measurement of Pollution in the Troposphere (MOPITT) instrument is an eight-channel gas correlation radiometer launched on the Earth Observing System (EOS) Terra spacecraft in 1999. Its main objectives are to measure carbon monoxide (CO) and methane (CH4) concentrations in the troposphere. This work analyzes tropospheric carbon monoxide distributions using MOPITT data in East Asia and compared ozone distributions. In general, seasonal CO variations are characterized by a spring peak and decreased in the summer. Also, this work revealed that the seasonal cycles of CO are spring maximum and summer minimum with averaged concentrations ranging from 118ppbv to 170ppbv. The CO monthly means show a similar profiles to those of O3. This fact clearly indicates that the high concentration of CO in spring is caused by two possible causes: the photochemical CO production in the troposphere, transport of the CO in the northeast Asia. The CO and O3 seasonal cycles in northeast Asia are influenced extensively by the seasonal exchange of the different types of air mass due to the Asian monsoon. The continental air masses contain high concentrations of O3 and CO due to higher continental background concentrations and sometimes due to the contribution of regional pollution. In summer the transport pattern is reversed. The Pacific marine air masses prevail over Korea, so that the marine air masses bring low concentrations of CO and O3, which tend to give the apparent minimum in summer.

• 한국지하수토양환경학회:학술대회논문집
• /
• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
• /
• pp.408-412
• /
• 2004

A total of 23 springs distributed in the southern and northern sides of Mt. Hala in Jeju Island were seasonally sampled and analyzed for their major ion chemistry and oxygen and hydrogen isotope compositions to investigate their hydrogeochemical and isotopic characteristics. Dissolved ion concentrations of the south-side springs slightly increase with decreasing altitude. This indicates that dissolved ion concentrations of groundwater recharged at higher altitudes increase by water-rock interaction during the downgradient migration of groundwater through highly permeable volcanic aquifer. Dissolved ion concentrations of the north-side springs also slightly increase with decreasing altitude, but dramatically increase at ～300 m.a.s.l. This may indicate a sudden input of contaminants to the north-side groundwater system around ～300 m.a.s.l. Springs located in areas above ～300 m.a.s.l. have very low concentrations of dissolved ions, showing little seasonal variations. Whereas springs located in areas below ～300 m.a.s.l. show a big seasonal variation in the concentration of dissolved ions. Seasonal variation of oxygen isotope compositions of springs is ～3$\textperthousand$ for high-altitude springs (～1700 m.a.s.l.) and is ～2$\textperthousand$ near shore, indicating an attenuation of the variation through mixing with other groundwater bodies during migration.