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| 1 | 赤道太平洋潜流变化特征及其与异常海温东传显示文摘应用TOGA-TAO实测海流资料(ADCP)和SODA同化海流和海温资料,分析探讨了赤道太平洋潜流的季节和年际变化特征,以及与赤道异常暖水东传的内在联系.揭示了El Nino事件中异常暖水东传的物理机制.结果表明,赤道太平洋潜流具有明显的季节变化和年际变化特征.潜流的垂直最大深度可由海表层至300~400m,其多年平均最大流速可达100 cm/s.潜流最大中心的纬向变化位置基本维持在160°W-130°W之间.在年际变化中,赤道潜流变化特征非常明显,尤其是在El Nino事件发生过程中,赤道潜流出现明显的加强现象.其最大流速可达140 cm/s以上.在西太平洋暖池区域次表层暖水东传之前,位于中东太平洋次表层的赤道潜流就已出现加强,其最大流速中心沿温跃层不断加强和东移,'引导'来自西太平洋暖池区域次表层的异常暖水向东传播.因此,可以认为西太平洋暖池区域异常暖水的东传与赤道潜流的强度和东传存在密切关系,也就是说在El Nino事件中,赤道潜流的变化是导致西太平洋暖池区域次表层异常暖水东传的重要机制. | 陈锦年 吕新艳 胡敦欣 | 2005 | 水科学进展2005，16，6： | 7 |
| 2 | Preliminary study on decadal variations of EI Nino-associated adjustment in the tropical Pacific thermocline显示文摘Statistical analysis about ENSO index represented by SSTA in Nino3 with several datasets shows obviously decadal changes in the dominant period and amplitude of ENSO. Correlation analysis about the composite E1 Nino events before and after 1976 exhibits obviously decadal changes in the propagation and intensity of the oceanic anomaly related to the variation of SSTA in Nino3. In the composite E1 Nino before 1976, the coherence is relatively weak between the oceanic anomaly in the tropical Pacific and the SSTA in the Nino3 region; the area with significant correlation coefficient is relatively small; the oceanic anomaly related to Nino3 SSTA propagates faster. The above changes correspond well to the decadal changes of ENSO cycles. Some preliminary explanations are given based on the analysis of the decadal changes in the thermocline. The tropical thermocline shoals after 1976 except in the equatorial far East Pacific and the inclination of the tropical thermocline deep west and shallow east patterns weakens. Much of the oceanic anomaly from the relative higher latitude contributes to the slow propagation of the oceanic anomaly in the North Pacific. The air-sea coupling in the tropical Pacific intensifies after 1976 corresponding to decadai change of the ENSO amplitude. Decadai adjustment of the thermocline may have influenced the propagation and intensity of the oceanic anomaly related to the ENSO and intensity of air-sea interaction in the tropical Pacific, and changed the dominant period of ENSO and its amplitude. | MENGXiangfeng WUDexing HURuijin | 2004 | Acta Oceanologica Sinica2004，23，3： | 6 |
| 3 | Simulation evaluation and future prediction of the IPCC—AR4 GCMs on the extreme temperatures in China显示文摘On the basis of the temperature observations during 1961-2000 in China,seven coupled general circulation models'(GCMs)extreme temperature products are evaluated supplied by the Intergovernmental Panel on Climate Change's 4th Assessment Report(IPCC-AR4).The extreme temperature indices in use are frost days(FD),growing season length(GSL),extreme temperature range(ETR),warm nights(TN90),and heat wave duration index(HWDI).Results indicate that all the seven models are capable of simulating spatial and temporal variations in temperature characteristics,and their ensemble acts more reliable than any single one.Among the seven models,GFDL-CM2.0 and MIROC3.2 performances are much better.Besides,most of the models are able to present linear trends of the same positive/negative signs as the observations but for weaker intensities.The simulation effects are different on a nationwide basis,with 110°N as the division,east(west)of which the effects are better(worse)and the poorer over the Qinghai-Tibetan Plateau in China.The predictions for the 21st century on emissions scenarios show that except decreases in the FD and ETR,other indices display significant increasing trend,especially for the indices of HWDI and TN90,which represent the notable extreme climate.This indicates that the temperature-related climate is moving towards the extreme.In the late 21st century,the GSL and TN90(HWDI)increase most notably in southwest China(the Qinghai-Tibetan Plateau),and the FD decrease most remarkably in the Qinghai-Tibetan Plateau,northwest and northeast of China.Apart from South China,the yearly change range of the extreme temperature is reduced in most of China. | WANG Ji JIANG Zhihong SONG Jie LOU Dejun | 2008 | Acta Oceanologica Sinica2008，27，3： | 2 |
| 4 | Skewness of subsurface ocean temperature in the equatorial Pacific based on assimilated data显示文摘The skewness of subsurface temperature anomaly in the equatorial Pacific Ocean shows a significant asymmetry between the east and west.A positive temperature skewness appears in the equatorial eastern Pacific,while the temperature skewness in the western and central Pacific is primarily negative.There is also an asymmetry of the temperature skewness above and below the climatological mean thermocline in the central and western Pacific.A positive skewness appears below the thermocline,but the skewness is negative above the thermocline.The distinctive vertical asymmetry of the temperature skewness is argued to be attributed to the asymmetric temperature response to upward and downward thermocline displacement in the presence of the observed upper-ocean vertical thermal structure.Because of positive(negative) second derivative of temperature with respect to depth below(above) the thermocline,an upward and a downward shift of the thermocline with equal displacement would lead to a negative temperature skewness above the thermocline but a positive skewness below the thermocline.In the far eastern equatorial Pacific,the thermocline is close to the base of the mixed layer,the shape of the upper-ocean vertical temperature profile cannot be kept.Positive skewness appears in both below the thermocline and above the thermocline in the far eastern basin.Over the central and eastern Pacific,the anomalies of the subsurface waters tend to entrain into the surface mixed layer(by climatological mean upwelling) and then affect the SST.Hence,the positive(negative) subsurface skewness in the far eastern(central) Pacific may favor positive(negative) SST skewness,which is consistent with the observational fact that more La Nia(El Nio) occur in the central(eastern) Pacific.The present result implies a possible new paradigm for El Nio and La Nia amplitude asymmetry in the eastern Pacific. | 苏京志 张人禾 LI Tim 容新尧 | 2009 | Chinese Journal of Oceanology and Limnology2009，27，3： | 2 |
| 5 | Phylogenetic analysis of bacterial community in deep-sea sediment from the western Pacific “warm pool”显示文摘A depth profile of bacterial community structure in one deep-sea sediment core of the western Pacific 'warm pool' (WP) was investigated and compared with that in a sediment sample from the eastern Pacific (EP) by phylogenetic analysis of 16S rDNA fragments. Five bacterial 16S rDNA clone libraries were constructed, and 133 clones with different restriction fragment length polymorphism (RFLP) patterns were sequenced. A phylogenetic analysis of these sequences revealed that the bacterial diversity in a sample from the WP was more abundant than that in the EP sample. The bacterial population in the sediment core of WP was composed of eight major lineages of the domain bacteria. Among them the γ-Proteobacteria was the predominant and most diverse group in each section of WP sediment core, followed by the α-Proteobacteria. The genus Colwellia belonging to γ-Proteobacteria was predominant in this sample. The shift of bacterial communities among different sections of the WP sediment core was δ-, ε-Proteobacteria, and Cytopahga-Flexibacteria-Bacteroides (CFB) group. The ratios between them in the bacterial communities all showed inversely proportional to the depth of sediment. The sequences related to sulphate reducing bacteria (SRB) were detected in every section. The bacterial community structure in this sediment core might be related to the environmental characteristics of the surface seawater of the western Pacific WP. | ZHAO Jing ZENG Runying | 2005 | Acta Oceanologica Sinica2005，24，5： | 2 |
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