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| 1 | 黑潮延伸体区域海表温度锋的时空变化特征分析显示文摘利用NOAA最优插值逐日海表温度资料和AVISO中心的海表高度异常资料,分析了黑潮延伸体区域的海表温度锋的时空变化特征以及导致其年代际变化可能的原因。结果表明,气候平均态的黑潮延伸体区域海表温度锋位于黑潮延伸体区域北部边缘,在143°E和150°E附近存在两个弯曲,SST水平梯度最大值出现在142°E附近,强度超过4.5℃/(100 km),其后强度自西向东逐渐递减,在149°E附近又出现一个较弱的大值中心,在141~153°E范围内,海表温度锋位置的平均值为36.25°N,强度的平均值为3.22℃/(100 km)。黑潮延伸体区域的海表温度锋南北位置的季节变化很弱,而其强度的季节变化非常显著。相较于较弱的季节变化,海表温度锋位置的年际和年代际的低频变化则要显著得多,其南北变化跨度超过2°。海表温度锋强度的年际和年代际的低频变化也较强,超过4.5℃/(100 km)。黑潮延伸体区域的海表温度锋的变化与太平洋年代际振荡(PDO)以及北太平洋涡旋振荡(NPGO)存在显著的相关关系,NPGO和PDO在中东太平洋区域会强迫产生海表高度异常,随后向西传播,在约3年后到达黑潮延伸体区域,使该区域流场发生变化产生海洋热平流异常,最终导致海表温度锋强度发生变化。 | 刘明洋 谭言科 李崇银 余沛龙 殷明 | 2017 | 热带气象学报2017，33，6： | 2 |
| 2 | A comparison of the strength and position variability of the Kuroshio Extension SST front显示文摘This study compares the seasonal and interannual-to-decadal variability in the strength and position of the Kuroshio Extension front(KEF)using high-resolution satellite-derived sea surface temperature(SST)and sea surface height(SSH)data.Results show that the KEF strength has an obvious seasonal variation that is similar at different longitudes,with a stronger(weaker)KEF during the cold(warm)season.However,the seasonal variation in the KEF position is relatively weak and varies with longitude.In contrast,the low-frequency variation of the KEF position is more distinct than that of the KEF strength even though they are well correlated.On both seasonal and interannual-to-decadal time scales,the western part of the KEF(142°–144°E)has the greatest variability in strength,while the eastern part of the KEF(149°–155°E)has the greatest variability in position.In addition,the relationships between wind-forced Rossby waves and the low-frequency variability in the KEF strength and position are also discussed by using the statistical analysis methods and a wind-driven hindcast model.A positive(negative)North Pacific Oscillation(NPO)-like atmospheric forcing generates positive(negative)SSH anomalies over the central North Pacific.These oceanic signals then propagate westward as Rossby waves,reaching the KE region about three years later,favoring a strengthened(weakened)and northward(southward)-moving KEF. | Peilong Yu Lifeng Zhang Mingyang Liu Quanjia Zhong Yongchui Zhang Xin Li | 2020 | Acta Oceanologica Sinica2020，39，5： | 1 |
| 3 | A dual-period response of the Kuroshio Extension SST to Aleutian Low activity in the winter season显示文摘Based on our previous work, the winter sea surface temperature(SST) in the Kuroshio Extension(KE) region showed significant variability over the past century with periods of ~6 a between 1930 and 1950 and ~10 a between1980 and 2009. How the activity of the Aleutian Low(AL) induces this dual-period variability over the two different timespans is further investigated here. For the ~6 a periodicity during 1930–1950, negative wind stress curl(WSC)anomalies in the central subtropical Pacific associated with an intensified AL generate positive sea surface height(SSH) anomalies. When these wind-induced SSH anomalies propagate westwards to the east of Taiwan, China two years later, positive velocity anomalies appear around the Kuroshio to the east of Taiwan and then the mean advection via this current of velocity anomalies leads to a strengthened KE jet and thus an increase in the KE SST one year later. For the ~10 a periodicity during 1980–2009, a negative North Pacific Oscillation-like dipole takes2–3 a to develop into a significant positive North Pacific Oscillation-like dipole, and this process corresponds to the northward shift of the AL. Negative WSC anomalies associated with this AL activity in the central North Pacific are able to induce the positive SSH anomalies. These oceanic signals then propagate westward into the KE region after 2–3 a, favoring a northward shift of the KE jet, thus leading to the warming of the KE SST. The feedbacks of the KE SST anomaly on the AL forcing are both negative for these two periodicities. These results suggest that the dual-period KE SST variability can be generated by the two-way KE-SST-AL coupling. | YU Peilong ZHANG Lifeng LIU Hu LIU Xing ZHU Juan | 2017 | Acta Oceanologica Sinica2017，36，9： | 1 |
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