Interannual to decadal variability of phosphate in the Oyashio region: Roles of wind-driven ocean current and tidally induced vertical mixing in the Sea of Okhotsk
Interannual to decadal variability of phosphate in the Oyashio region: Roles of wind-driven ocean current and tidally induced vertical mixing in the Sea of Okhotsk
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亲潮地区磷酸盐的年际至年代际变化：风驱动洋流和潮汐引起的鄂霍次克海垂直混合的作用
DOI：
10.1016/j.pocean.2021.102615
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发表时间：
2021
影响因子：
4.1
通讯作者：
Uchimoto Keisuke
中科院分区：
文献类型：
--
作者：
Nakanowatari Takuya;Nakamura Tomohiro;Mitsudera Humio;Nishioka Jun;Kuroda Hiroshi;Uchimoto Keisuke
在Oyashio地区，在磷酸盐（PO 4）浓度等地球化学参数中观察到了显着的气候信号，并就可能的原因进行了辩论。利用一个简单的冰-海耦合模式，研究了Oyashio地区表层PO 4年际-年代际变化的控制机制及其与气候变化的关系。1980-2010年和18.6年的潮汐混合强度在千岛海峡的大气再分析数据被迫后投实验定性模拟的年际-年代际变化的表面PO 4，包括一个现实的季节性周期。Oyashio地区模拟的PO 4年际波动在冬季是突出的，其特点是逐年变化。混合层中PO 4的收支分析表明，冬季PO 4的增加是由横向平流和局地垂直对流引起的。负责横向平流的PO 4的地转流的变化主要是有关的正压响应逮捕的地形波在鄂霍次克海以及在北太平洋的风驱动的环流，这两者都是受冬季季风大气模式的强度。在年代际尺度（>7年）上，Oyashio地区表层PO 4的时间变化具有年代际尺度波动的特征，在1985、1995和2005年（1990和2000年）前后出现正（负）峰值。一系列的敏感性实验表明，PO 4的年代际变化在很大程度上是由大气风条件解释，但是，调制18.6年的潮汐混合是不可忽略的。风强迫实验数据的诊断分析表明，年代际PO 4信号是平流从鄂霍次克海，在那里8年领先的冬季Ekman上升流供应PO 4丰富的水在北方陆架地区，并负责的大气环流与西太平洋模式。我们的模型模拟表明，冬季风驱动的电流系统在鄂霍次克海是重要的系统喂养表面营养物质到Oyashio地区的年际-年代际的时间尺度。
In the Oyashio region, remarkable climatic signals are observed in biogeochemical parameters such as phosphate (PO4) concentration and debate continues regarding possible causes. Using a regional ice–ocean coupled model with a simple biogeochemical cycle, this study investigated the mechanisms controlling interannual–decadal variations in surface PO4in the Oyashio region and their relationships to climate change. Hindcast experiments forced with atmospheric reanalysis data for 1980–2010 and 18.6-year tidal mixing strength in the Kuril Straits qualitatively simulated interannual–decadal variations of surface PO4, including a realistic seasonal cycle. Interannual fluctuations of simulated PO4in the Oyashio region are prominent in winter and characterized by year-to-year variability. Budget analysis of PO4in the mixed layer showed that the wintertime increase in PO4is caused by lateral advection as well as by local vertical convection. The geostrophic current variability responsible for lateral advection of PO4is related primarily to the barotropic response of arrested topographic waves in the Sea of Okhotsk as well as the wind-driven gyre in the North Pacific, both of which are regulated by the strength of the wintertime monsoon atmospheric pattern. On a decadal timescale (>7 years), temporal variations of surface PO4in the Oyashio region are characterized by decadal-scale fluctuation with positive (negative) peaks around 1985, 1995, and 2005 (1990 and 2000). A series of sensitivity experiments demonstrated that the decadal variability of PO4is largely explained by atmospheric wind conditions; however, modulation by 18.6-year tidal mixing is not negligible. Diagnostic analysis of wind-forced-experiment data revealed that the decadal PO4signal is advected from the Sea of Okhotsk, where 8-year leading wintertime Ekman upwelling supplies PO4-rich water in the northern shelf region, and that the responsible atmospheric circulation is related to the West Pacific pattern. Our model simulation suggests that the wintertime wind-driven current system in the Sea of Okhotsk is important to the system feeding surface nutrients into the Oyashio region on an interannual–decadal timescale.
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影响因子：
3.5
作者：
Itoh, Sachihiko;Yasuda, Ichiro
通讯作者：
Yasuda, Ichiro
影响因子：
5.2
作者：
J. Nishioka;T. Nakatsuka;Y. Watanabe;I. Yasuda;K. Kuma;H. Ogawa;N. Ebuchi;Alexey I. Scherbinin
通讯作者：
J. Nishioka;T. Nakatsuka;Y. Watanabe;I. Yasuda;K. Kuma;H. Ogawa;N. Ebuchi;Alexey I. Scherbinin
影响因子：
56.9
作者：
A. Tsuda;S. Takeda;H. Saito;J. Nishioka;Y. Nojiri;I. Kudo;H. Kiyosawa;A. Shiomoto;K. Imai;T. Ono;A. Shimamoto;D. Tsumune;T. Yoshimura;T. Aono;A. Hinuma;Masatoshi Kinugasa;Koji Suzuki;Y. Sohrin;Yoshifumi Noiri;H. Tani;Y. Deguchi;N. Tsurushima;H. Ogawa;K. Fukami;K. Kuma;T. Saino
通讯作者：
A. Tsuda;S. Takeda;H. Saito;J. Nishioka;Y. Nojiri;I. Kudo;H. Kiyosawa;A. Shiomoto;K. Imai;T. Ono;A. Shimamoto;D. Tsumune;T. Yoshimura;T. Aono;A. Hinuma;Masatoshi Kinugasa;Koji Suzuki;Y. Sohrin;Yoshifumi Noiri;H. Tani;Y. Deguchi;N. Tsurushima;H. Ogawa;K. Fukami;K. Kuma;T. Saino
日本北海道东太平洋沿岸大陆架区域海洋状况的季节变化
DOI：
10.5928/kaiyou.24.1_49
发表时间：
2009
期刊：
Oceanography in Japan
影响因子：
--
作者：
Akira Kusaka;T. Ono;Tomonari Azumaya;H. Kasai;Sachiko Oguma;Y. Kawasaki;K. Hirakawa
通讯作者：
K. Hirakawa
DOI：
--
发表时间：
2009
期刊：
Deep Sea Research, I 56
影响因子：
--
作者：
Matsuda;Junji
通讯作者：
Junji