Oceanic iron supply mechanisms which support the spring diatom bloom in the Oyashio region, western subarctic Pacific

スポンサーリンク

概要

• 論文の詳細を見る

• Multiyear (2003-2008) time series observations along the A line provided information on the temporal variability of the dissolved iron (diss-Fe) concentration in the Oyashio region of the western subarctic Pacific, and the data indicated that there was an annual cycle in the concentration of surface diss-Fe occurring every year. Diss-Fe was supplied into the surface water in this region every winter and supports the spring phytoplankton bloom after development of the thermocline. The diss-Fe concentration was drawn down during the phytoplankton bloom period and was depleted in summer in some water masses. Then diss-Fe increased from autumn to winter with the increasing depth of the surface mixed layer. The high diss-Fe concentrations in the surface layer in winter were controlled by mesoscale oceanic intrinsic processes, such as vertical winter mixing and horizontal Fe-rich intermediate water transport. Difference in magnitude of the winter mixing processes among different water masses caused the heterogeneous distribution of diss-Fe concentration in the surface layer. Moreover, the vertical section profiles along a cross-Oyashio transect showed the occurrence of Fe-rich intermediate water, and upward transport of materials from the intermediate water to the surface layer via tidal and winter mixing processes are important mechanisms to explain the high winter surface diss-Fe concentrations. Additionally, the substantially higher diss-Fe/NO3 ratio in the winter surface layer in this studied area other than the high-nutrient low-chlorophyll region indicates that the winter surface water in the Oyashio and the Oyashio-Kuroshio transition zone has a high potential to stimulate phytoplankton growth.

• American Geophysical Unionの論文
• 2011-02-16

著者

• 齊藤 宏明

  東北水研

• 斉藤 宏明

  東北水研

• YOSHIMURA TAKESHI

  Central Research Institute of Electric Power Industry

• ONO TSUNEO

  Hokkaido National Fisheries Research Institute

• Nishioka Jun

  Institute Of Low Temperature Science Hokkaido University

• Saito H

  Tohoku National Fisheries Research Institute

• Ono Tsuneo

  Fisheries Res. Agency Hokkaido Jpn

• 齊藤 宏明

  水研セ東北水研

関連論文

• SARES (Saroma-Resolute Studies) プロジェクトにおける1992年2月ー3月のサロマ湖の生物学的観測資料 (英文)
• 紫外線遮光下における厚岸湾の植物プランクトンの光合成率の増加〔英文〕
• 1990年8-9月の千島列島周辺海域における栄養塩分布特性
• Temporal changes in community composition of heterotrophic bacteria during in situ iron enrichment in the western subarctic Pacific (SEEDS-II)
• Primary productivity, bacterial productivity and nitrogen uptake in response to iron enrichment during the SEEDS II
• 北西太平洋亜寒帯域を中心とした海洋環境変動と低次生態系変動
• 西部亜寒帯太平洋A-lineにおける1990-1994年の栄養塩,クロロフィルαおよびネットプランクトン量の季節変動
• 流体中の粒子遭遇理論を用いた動物プランクトン摂餌に関する研究
• 海洋システム研究における生物モニタリング (総特集 継続的な海洋観測ネットワーク(1)その構築に向けて)
• Evidence for the Grazing Hypothesis : Grazing Reduces Phytoplankton Responses of the HNLC Ecosystem to Iron Enrichment in the Western Subarctic Pacific (SEEDS II)
• Iron supply to the western subarctic Pacific : Importance of iron export from the Sea of Okhotsk
• Recent Comparability of Oceanographic Nutrients Data : Results of a 2003 Intercomparison Exercise Using Reference Materials
• Temporal Change of Dissolved Inorganic Carbon in the Subsurface Water at Station KNOT (44°N, 155°E) in the Western North Pacific Subpolar Region
• Mesozooplankton response to iron enrichment during the diatom bloom and bloom decline in SERIES (NE Pacific)
• Phytoplankton community response to Fe and temperature gradients in the NE (SERIES) and NW (SEEDS) subarctic Pacific Ocean
• 環境変動に伴う海洋生物大発生現象に関する研究プロジェクト(POMAL)について
• 海のミジンコ海深くCO_2封印 : 地球規模の炭素循環に重要な役割
• 独立行政法人水産総合研究センターが実施している水産資源の変動予測技術に関するプロジェクト研究-IV.「深層生態系」- : 海洋システム科学における水産資源研究
• A ラインにおける低次生産モニタリング
• 北太平洋亜寒帯域およびその縁辺海におけるカイアシ類Neo-calanus cristatus, N. plum chrusおよびN. flemingeriの体サイズの地理変化: 特に親潮域における大型N. flemingeriの起源について
• Aラインにおける低次生産モニタリング (総特集 水産海洋研究におけるモニタリング)
• 親潮域における栄養塩類及びプランクトンの季節変動及び経年変動--Aライン観測10年の概要
• 道東沖の基礎生産と動物プランクトン
• 春季の親潮域および移行域における珪酸塩と硝酸塩の消費過程 (総特集 黒潮親潮移行域の物理・生物・化学過程) -- (3章 黒潮親潮移行域の低次生物生産)
• 親潮域における低次生産特性とカイアシ類日周摂食リズムに関する研究(1998年度日本海洋学会岡田賞受賞記念講演)
• Isotopic Tracers for Water Masses in the Coastal Region of Eastern Hokkaido
• Has the 1998 Regime Shift Also Occurred in the Oceanographic Conditions and Lower Trophic Ecosystem of the Oyashio Region?
• Response of lower trophic organisms to nutrient input and effects on carbon budget : a mesocosm experiment
• Seasonal and Interannual Variation of DIC in Surface Mixed Layer in the Oyashio Region : A Climatological View
• Interannual variation in Neocalanus biomass in the Oyashio waters of the western North Pacific
• Increased Stratification and Decreased Lower Trophic Level Productivity in the Oyashio Region of the North Pacific : A 30-Year Retrospective Study
• Life histories of Eucalanus bungii and Neocalanus cristatus (Copepoda : Calanoida) in the western subarctic Pacific Ocean
• Geographical Variation of Body Size of Neocalanus cristatus, N. plumchrus and N. flemingeri in the Subarctic Pacific and Its Marginal Seas: Implications for the Origin of Large Form of N. flemingeri in the Oyashio Area
• Life history strategies of subarctic copepods Neocalanus flemingeri and N. plumchrus, especially concerning lipid accumulation patterns
• Estimation of Standing Stock of Chlorophyll a and Primary Production from Remote-Sensed Ocean Color in the Oyashio Region, the Western Subarctic Pacific, during the Spring Bloom in 1997
• Nutrient Regeneration at Bottom after a Massive Spring Bloom in a Subarctic Coastal Environment, Funka Bay, Japan
• Change in the water quality in Lake Ohnuma, Hokkaido, Japan: a comparison of 1977 and 1996
• Differences in cell viabilities of phytoplankton between spring and late summer in the northwest Pacific Ocean
• The Docosahexaenoic Acid Content in the Lipid of Albacore Thunnus alalunga Caught in Two Separate Localities
• Comparison of Time-Dependent Tracer Ages in the Western North Pacific : Oceanic Background Levels of SF_6, CFC-11, CFC-12 and CFC_113
• 親潮域における低次生産の季節変動特性と橈脚類日周摂食リズムに関する研究
• Oceanic iron supply mechanisms which support the spring diatom bloom in the Oyashio region, western subarctic Pacific
• Annual Anthropogenic Carbon Transport into the North Pacific Intermediate Water through the Kuroshio/Oyashio Interfrontal Zone: An Estimation from CFCs Dsitribution
• Temporal Trends in Apparent Oxygen Utilization in the Upper Pycnocline of the North Pacific : 1980-2000
• Re-Estimation of Annual Anthropogenic Carbon Input from Oyashio into North Pacific Intermediate Water
• Seasonal Change of Oceanographic Conditions and Chlorophyll a Vertical Distribution in the Southwestern Okhotsk Sea during the Non-Iced Season
• Iron Deficiency in Micro-Sized Diatoms in the Oyashio Region of the Western Subarctic Pacific during Spring
• Biogeochemical data of the 52nd Japanese Antarctic Research Expedition in austral summer of 2010-2011
• 仙台湾における震災後の海洋環境
• 岡田賞受賞者からの提言(21世紀の海洋学の展望1)
• Biogeochemical data and chlorophyll a concentrations of phytoplankton during a cruise of the 53rd Japanese Antarctic Research Expedition in the austral summer of 2011-2012

もっと見る 閉じる

スポンサーリンク