利用1957—2006共50年高分辨率的长时间序列海洋模式OFES(OGCM for the Earth Simulator)数据,对北赤道流(NEC)的分叉规律及其与ENSO循环的关系进行了分析。结果表明:(1)NEC分叉纬度具有明显的季节和年际变化,周期主要呈现为3—6个月的...利用1957—2006共50年高分辨率的长时间序列海洋模式OFES(OGCM for the Earth Simulator)数据,对北赤道流(NEC)的分叉规律及其与ENSO循环的关系进行了分析。结果表明:(1)NEC分叉纬度具有明显的季节和年际变化,周期主要呈现为3—6个月的季节内振荡和2年、2—7年左右ENSO尺度周期振荡以及10年以上的年代际变化。在季节尺度上,分叉位置春季偏南,秋季偏北,并且分叉纬度随深度的增加向北移动,其北移幅度冬季最大,夏季最小。而在年际变化尺度上,NEC分叉纬度具有较强的年际变化信号,与ENSO循环密切相关,El Ni?o年分叉位置偏北,La Ni?a年分叉位置偏南。(2)NEC分叉纬度的变化与北太平洋0—30°N之间的纬向风应力旋度积分零线位置密切相关,零线的南北偏移导致了分叉位置的改变,在不同深度上,零线位置对分叉纬度改变的影响时间不同,表层需1个月,而500 m深度则需4个月左右。(3)NEC分叉影响着黑潮(KC)与(棉兰老流)MC的流量分配率,其年际异常变化与冷、暖ENSO事件发生密切相关,当El Ni?o发生时,KC流量分配率减少,MC流量分配率增加;La Ni?a年情况则相反。展开更多
自黑潮脱落并由吕宋海峡进入中国南海的中尺度涡(简称脱落涡旋)对黑潮与南海的水体交换、热量及物质输送等过程均有十分重要的作用。基于1993—2013年OFES(OGCM for the Earth Simulator)模式数据产品,分析研究了脱落涡旋的统计特征及...自黑潮脱落并由吕宋海峡进入中国南海的中尺度涡(简称脱落涡旋)对黑潮与南海的水体交换、热量及物质输送等过程均有十分重要的作用。基于1993—2013年OFES(OGCM for the Earth Simulator)模式数据产品,分析研究了脱落涡旋的统计特征及其温盐流三维结构,并与卫星观测结果进行对比分析。OFES模式的海表面高度数据和卫星高度计数据的统计结果都表明气旋式脱落涡旋(脱落冷涡)绝大部分在黑潮西侧边缘生成,反气旋式脱落涡旋(脱落暖涡)则大部分在黑潮控制区(包括黑潮流套区)生成,脱落暖涡的数量远多于脱落冷涡的。OFES模式数据得到的脱落涡旋个数和出现频率较卫星观测结果要明显偏低。此外,由OFES模式数据得到的脱落涡旋三维结构表明,黑潮控制区和黑潮西侧边缘生成的脱落冷涡的流场垂向影响深度差异较大,而脱落暖涡的流场垂向影响深度一般达水深1000 m以深,脱落涡旋的位势温度的垂向影响深度与该涡的流场垂向影响深度相当,其盐度的垂向影响深度则较浅;脱落涡旋的温盐结构受黑潮的影响较大。展开更多
Previous work from this laboratory has demonstrated that the induction of c-fos by angiotensin (Ang) Ⅱ in vascular smooth muscle cells (VSMC) is mediated by at least two enhancer elements, the serum response element ...Previous work from this laboratory has demonstrated that the induction of c-fos by angiotensin (Ang) Ⅱ in vascular smooth muscle cells (VSMC) is mediated by at least two enhancer elements, the serum response element (SRE) and the cyclic AMP response element (CRE). These two elements appear to act independently and equally. The current study is aimed at identifying the trans-acting proteins that interact with these enhancer ele-.ments to mediate this response. Rat aortic smooth muscle (RASM) cells were grown in culture and made quiescent by placing them in a defined serum-free media for 48 hours.Aug Ⅱor vehicle was then added, the cells harvested 30 minutes later and nuclear extracts isolated. Gel mobility shift assay were then performed.gel shifts done with wild type SRE oligonucleotide demonstrated that two specific proteins bound to this element.Mutations in central CArG box of the SRE inhibited binding but mutations in the ets binding site in the SRE had no effect. Extracts from Aug Ⅱor vehicle treated cells demonstrated an identical pattern of binding. Similar experiments performed with CRE noligonucleotide identified three proteins which bound to CRE. Again,no differences were observed between vehicle and AugⅡtreated extracts. An antibody to serum response factor(SRF),which binds to the SRE, supershifted the proteins that bound to the SRE. When gel shifts with RASM cells extracts were compared to gel shifts from either NIH 3T3 fibroblast cell extraes of HeLa cell extracts,a different pattern of protein binding was observed using the SRE oligonucleotide.In contrast to the studies with the SRF antibody,an antibody to CRE binding protein (CREB)-43, the most common CREB protein, failed to recognize protein from RASM extract in a supershift assay. When the gel shift pattern with the CRE oligonucleotide between RASM, 3T3 and HeLa cell extracts was compared,no similarity was seen. Taken together,'these data suggest that stimulation of c-for in VSMC's occurs via activation of a unique set of proteins. Activation of these proteins is not due to new protein synthesis. Further work will be aimed at identifying these proteins and studying their mechanism of activation in VSMC's.展开更多
为增强浮式生产储油和卸油装置(Floating Production Storage And Offloading,FPSO)航行辅助系统设计的科学性和合理性,对航行辅助系统的结构、设计、设备选型、布置原则等进行介绍。在对相关规范分析和实船验证的基础之上,提出一套完整...为增强浮式生产储油和卸油装置(Floating Production Storage And Offloading,FPSO)航行辅助系统设计的科学性和合理性,对航行辅助系统的结构、设计、设备选型、布置原则等进行介绍。在对相关规范分析和实船验证的基础之上,提出一套完整的FPSO航行辅助系统设计方法。研究成果可为FPSO航行辅助系统的设计提供一定参考。展开更多
利用高分辨率的长时间序列海洋模式资料OFES(OGCM for the Earth Simulator),对北太平洋低纬度西边界流的时空分布特征及其与ENSO循环的联系进行了初步分析。结果表明:北太平洋低纬度西边界流具有明显的季节和年际变化特征。在季节尺度...利用高分辨率的长时间序列海洋模式资料OFES(OGCM for the Earth Simulator),对北太平洋低纬度西边界流的时空分布特征及其与ENSO循环的联系进行了初步分析。结果表明:北太平洋低纬度西边界流具有明显的季节和年际变化特征。在季节尺度上,整个NMK系统都表现为春强秋弱,而在年际尺度上,NEC和KC主要为2-7年的ENSO周期;MC主要表现为准两年周期振荡。另外,整个NMK系统与ENSO循环密切相关,当ElNio发生时,NMK系统流量增大,流系加强,而当LaNia发生时,NMK系统流量减小,流系变弱。整个过程大约为6-10个季节,是一个准ENSO过程。展开更多
文摘利用1957—2006共50年高分辨率的长时间序列海洋模式OFES(OGCM for the Earth Simulator)数据,对北赤道流(NEC)的分叉规律及其与ENSO循环的关系进行了分析。结果表明:(1)NEC分叉纬度具有明显的季节和年际变化,周期主要呈现为3—6个月的季节内振荡和2年、2—7年左右ENSO尺度周期振荡以及10年以上的年代际变化。在季节尺度上,分叉位置春季偏南,秋季偏北,并且分叉纬度随深度的增加向北移动,其北移幅度冬季最大,夏季最小。而在年际变化尺度上,NEC分叉纬度具有较强的年际变化信号,与ENSO循环密切相关,El Ni?o年分叉位置偏北,La Ni?a年分叉位置偏南。(2)NEC分叉纬度的变化与北太平洋0—30°N之间的纬向风应力旋度积分零线位置密切相关,零线的南北偏移导致了分叉位置的改变,在不同深度上,零线位置对分叉纬度改变的影响时间不同,表层需1个月,而500 m深度则需4个月左右。(3)NEC分叉影响着黑潮(KC)与(棉兰老流)MC的流量分配率,其年际异常变化与冷、暖ENSO事件发生密切相关,当El Ni?o发生时,KC流量分配率减少,MC流量分配率增加;La Ni?a年情况则相反。
文摘自黑潮脱落并由吕宋海峡进入中国南海的中尺度涡(简称脱落涡旋)对黑潮与南海的水体交换、热量及物质输送等过程均有十分重要的作用。基于1993—2013年OFES(OGCM for the Earth Simulator)模式数据产品,分析研究了脱落涡旋的统计特征及其温盐流三维结构,并与卫星观测结果进行对比分析。OFES模式的海表面高度数据和卫星高度计数据的统计结果都表明气旋式脱落涡旋(脱落冷涡)绝大部分在黑潮西侧边缘生成,反气旋式脱落涡旋(脱落暖涡)则大部分在黑潮控制区(包括黑潮流套区)生成,脱落暖涡的数量远多于脱落冷涡的。OFES模式数据得到的脱落涡旋个数和出现频率较卫星观测结果要明显偏低。此外,由OFES模式数据得到的脱落涡旋三维结构表明,黑潮控制区和黑潮西侧边缘生成的脱落冷涡的流场垂向影响深度差异较大,而脱落暖涡的流场垂向影响深度一般达水深1000 m以深,脱落涡旋的位势温度的垂向影响深度与该涡的流场垂向影响深度相当,其盐度的垂向影响深度则较浅;脱落涡旋的温盐结构受黑潮的影响较大。
文摘Previous work from this laboratory has demonstrated that the induction of c-fos by angiotensin (Ang) Ⅱ in vascular smooth muscle cells (VSMC) is mediated by at least two enhancer elements, the serum response element (SRE) and the cyclic AMP response element (CRE). These two elements appear to act independently and equally. The current study is aimed at identifying the trans-acting proteins that interact with these enhancer ele-.ments to mediate this response. Rat aortic smooth muscle (RASM) cells were grown in culture and made quiescent by placing them in a defined serum-free media for 48 hours.Aug Ⅱor vehicle was then added, the cells harvested 30 minutes later and nuclear extracts isolated. Gel mobility shift assay were then performed.gel shifts done with wild type SRE oligonucleotide demonstrated that two specific proteins bound to this element.Mutations in central CArG box of the SRE inhibited binding but mutations in the ets binding site in the SRE had no effect. Extracts from Aug Ⅱor vehicle treated cells demonstrated an identical pattern of binding. Similar experiments performed with CRE noligonucleotide identified three proteins which bound to CRE. Again,no differences were observed between vehicle and AugⅡtreated extracts. An antibody to serum response factor(SRF),which binds to the SRE, supershifted the proteins that bound to the SRE. When gel shifts with RASM cells extracts were compared to gel shifts from either NIH 3T3 fibroblast cell extraes of HeLa cell extracts,a different pattern of protein binding was observed using the SRE oligonucleotide.In contrast to the studies with the SRF antibody,an antibody to CRE binding protein (CREB)-43, the most common CREB protein, failed to recognize protein from RASM extract in a supershift assay. When the gel shift pattern with the CRE oligonucleotide between RASM, 3T3 and HeLa cell extracts was compared,no similarity was seen. Taken together,'these data suggest that stimulation of c-for in VSMC's occurs via activation of a unique set of proteins. Activation of these proteins is not due to new protein synthesis. Further work will be aimed at identifying these proteins and studying their mechanism of activation in VSMC's.
文摘为增强浮式生产储油和卸油装置(Floating Production Storage And Offloading,FPSO)航行辅助系统设计的科学性和合理性,对航行辅助系统的结构、设计、设备选型、布置原则等进行介绍。在对相关规范分析和实船验证的基础之上,提出一套完整的FPSO航行辅助系统设计方法。研究成果可为FPSO航行辅助系统的设计提供一定参考。
文摘利用高分辨率的长时间序列海洋模式资料OFES(OGCM for the Earth Simulator),对北太平洋低纬度西边界流的时空分布特征及其与ENSO循环的联系进行了初步分析。结果表明:北太平洋低纬度西边界流具有明显的季节和年际变化特征。在季节尺度上,整个NMK系统都表现为春强秋弱,而在年际尺度上,NEC和KC主要为2-7年的ENSO周期;MC主要表现为准两年周期振荡。另外,整个NMK系统与ENSO循环密切相关,当ElNio发生时,NMK系统流量增大,流系加强,而当LaNia发生时,NMK系统流量减小,流系变弱。整个过程大约为6-10个季节,是一个准ENSO过程。
