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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.12
- 수록면
- 437 - 445 (9page)
- DOI
- http://dx.doi.org/10.4217/OPR.2014.36.4.437
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초록· 키워드
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A time-series sediment trap was operated at a water depth of 4950 m from July 2003 to May 2004 at KOMO station (10o30'N, 131o20'W) in the northeastern equatorial Pacific, with the aim of understanding the temporal variation of planktonic foraminifera assemblages in response to the seasonal shift of Inter-Tropical Convergence Zone (ITCZ). A total of 22130 planktonic foraminifera specimens belonging to 30 species and 11 genera were identified, which shows a distinct seasonal variation with high values (125~288 specimens m?2 day?1) in the winter to spring (December-May) and low values (16~23 specimens m?2 day?1) in the fall (September-November). In addition, seasonal ecological differences of foraminifera assemblages are distinctly recognizable: omnivorous foraminifera occurred predominantlyduring the summer season, whereas herbivorous ones were dominant during the winter season. Such seasonal variations correspond to the seasonal shift of the ITCZ. Enhanced occurrence of herbivorous species during the winter-spring season seems a result of surface water mixing generated by the southward shift of the ITCZ. The increase in omnivorous species during the summer season may be due to the northward movement of the ITCZ caused by weakened wind speed, resulting in the intensification of water column stratification and nutrient-poor environment. A significant reduction of planktonic foraminifera specimens during the fall is attributed to heavy precipitation and reduction in light intensity.
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참고문헌 (38)
참고문헌 신청
Amador JA / 2006 / Atmospheric forcing of the eastern tropical Pacific: A review / Prog Oceanogr 69 : 101 ~ 142
Andreasen DJ / 1997 / Tropical Pacific Ocean thermocline depth reconstructions for the Last Glacial Maximum / Paleoceanography 12(3) : 395 ~ 413
Barber RT / 1996 / Primary productivity and its regulation in the equatorial Pacific during and following the 1991-1992 El Niño / Deep-Sea Res Pt II 43 : 933 ~ 969
Bijma J / 1990 / Temperature and salinity limits for growth and survival of some planktonic foraminifers in laboratory cultures / J Foramin Res 20(2) : 95 ~ 116
Chaisson WP / 1995 / Planktonic foraminiferal assemblages and paleoceanographic change in the trans-tropical Pacific Ocean: A comparison of west (Leg 130) and east (Leg 138) / latest Miocene to Pleistocene. Proc Ocean Drill Program Sci Results 138 : 555 ~ 597
Andreasen DJ / 1997 / Tropical Pacific Ocean thermocline depth reconstructions for the Last Glacial Maximum / Paleoceanography 12(3) : 395 ~ 413
Barber RT / 1996 / Primary productivity and its regulation in the equatorial Pacific during and following the 1991-1992 El Niño / Deep-Sea Res Pt II 43 : 933 ~ 969
Bijma J / 1990 / Temperature and salinity limits for growth and survival of some planktonic foraminifers in laboratory cultures / J Foramin Res 20(2) : 95 ~ 116
Chaisson WP / 1995 / Planktonic foraminiferal assemblages and paleoceanographic change in the trans-tropical Pacific Ocean: A comparison of west (Leg 130) and east (Leg 138) / latest Miocene to Pleistocene. Proc Ocean Drill Program Sci Results 138 : 555 ~ 597
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