根据2006年1-6月中国鱿钓船在西南大西洋的生产统计和表面水温（SST）、海面高度距平值（SSHA）的资料，利用海洋地理信息系统软件Marine explorer 4．0绘制了各月产量、日产量与SST和SSHA的关系图，推测出各月渔场的最适SST和SSHA值，...根据2006年1-6月中国鱿钓船在西南大西洋的生产统计和表面水温（SST）、海面高度距平值（SSHA）的资料，利用海洋地理信息系统软件Marine explorer 4．0绘制了各月产量、日产量与SST和SSHA的关系图，推测出各月渔场的最适SST和SSHA值，并经K-S检验。结果表明：1—3月中心渔场主要分布在45°S、60°W附近海域，各月最适SST分别为11～12℃、12～13℃、12～13℃；4-6月中心渔场主要分布在42°S、58°W附近海域，各月最适SST分别为11～13℃、9～11℃、8～9℃。中心渔场主要分布在SSHA=0附近海域。中心渔场分布与SST和SSHA关系极为密切，可作为渔情分析指标。展开更多
Category 5 typhoon Megi was the most intense typhoon in 2010 of the world. It lingered in the South China Sea （SCS） for 5 d and caused a significant phytoplankton bloom detected by the satellite image. In this study...Category 5 typhoon Megi was the most intense typhoon in 2010 of the world. It lingered in the South China Sea （SCS） for 5 d and caused a significant phytoplankton bloom detected by the satellite image. In this study, the authors investigated the ocean biological and physical responses to typhoon Megi by using chlorophyll-a （chl-a） concentration, sea surface temperature （SST）, sea surface height anomaly （SSHA）, sea surface wind measurements derived from different satellites and in situ data. The chl-a concentration （〉3 mg/m3） increased thirty times in the SCS after the typhoon passage in comparison with the mean level of October averaged from 2002 to 2009. With the relationship of wind stress curl and upwelling, the authors found that the speed of upwelling was over ten times during typhoon than pre-typhoon period. Moreover, the mixed layer deepened about 20 m. These reveal that the enhancement of chl-a concentration was triggered by strong vertical mixing and upwelling. Along the track of typhoon, the maximum sea surface cooling （6-8~C） took place in the SCS where the moving speed of typhoon was only 1.4-2.8 m/s and the mixed layer depth was about 20 m in pre-typhoon period. However, the SST drop at the east of the Philippines is only 1-2~C where the translation speed of typhoon was 5.5-6.9 m/s and the mixed layer depth was about 40 m in pre-typhoon period. So the extent of the SST drop was probably due to the moving speed of typhoon and the depth of the mixed layer. In addition, the region with the largest decline of the sea surface height anomaly can indicate the location where the maximum cooling occurs.展开更多
用60 a Hadley气候中心的月平均海温资料,用EOF分析重构了4月份印度洋海温的一致变化型异常,并以此驱动IAP9层大气环流模式,分别研究了海温异常初期适应阶段、异常当月和气候平均夏季3种时间尺度下大气高度场响应的传播和分布特征。研...用60 a Hadley气候中心的月平均海温资料,用EOF分析重构了4月份印度洋海温的一致变化型异常,并以此驱动IAP9层大气环流模式,分别研究了海温异常初期适应阶段、异常当月和气候平均夏季3种时间尺度下大气高度场响应的传播和分布特征。研究发现,初期适应阶段,高度场响应的垂直传播约需4 d,且受控于整层无辐散约束;冷暖位相高度响应的水平传播路径差异较大,表现出明显的非对称性。海温异常当月,冷位相会激发出全球纬向Rossby波;而暖位相则激发出两半球洋面上2个大圆波列,且均有显著正压性。对气候平均夏季的北半球冷相位,高度响应表现为太平洋上空的3条异常纬带;对暖相位则表现为太平洋和大西洋上空的2个大圆波列。而南半球的高度场对冷位相响应主要表现为2波结构的绕极驻波,暖相位激发出环球的同心异常纬带。展开更多
文摘根据2006年1-6月中国鱿钓船在西南大西洋的生产统计和表面水温（SST）、海面高度距平值（SSHA）的资料，利用海洋地理信息系统软件Marine explorer 4．0绘制了各月产量、日产量与SST和SSHA的关系图，推测出各月渔场的最适SST和SSHA值，并经K-S检验。结果表明：1—3月中心渔场主要分布在45°S、60°W附近海域，各月最适SST分别为11～12℃、12～13℃、12～13℃；4-6月中心渔场主要分布在42°S、58°W附近海域，各月最适SST分别为11～13℃、9～11℃、8～9℃。中心渔场主要分布在SSHA=0附近海域。中心渔场分布与SST和SSHA关系极为密切，可作为渔情分析指标。
基金The National Basic Research Program "973" Program of China under contract No.2009CB421202the National Natural Science Foundation of China under contract Nos 40976110 and 40706061+1 种基金the Public Science and Technology Research Funds Projects of Ocean under contract No.200905012the Zhejiang Provincial Natural Science Foundation of China under contract No.Y5090381
文摘Category 5 typhoon Megi was the most intense typhoon in 2010 of the world. It lingered in the South China Sea （SCS） for 5 d and caused a significant phytoplankton bloom detected by the satellite image. In this study, the authors investigated the ocean biological and physical responses to typhoon Megi by using chlorophyll-a （chl-a） concentration, sea surface temperature （SST）, sea surface height anomaly （SSHA）, sea surface wind measurements derived from different satellites and in situ data. The chl-a concentration （〉3 mg/m3） increased thirty times in the SCS after the typhoon passage in comparison with the mean level of October averaged from 2002 to 2009. With the relationship of wind stress curl and upwelling, the authors found that the speed of upwelling was over ten times during typhoon than pre-typhoon period. Moreover, the mixed layer deepened about 20 m. These reveal that the enhancement of chl-a concentration was triggered by strong vertical mixing and upwelling. Along the track of typhoon, the maximum sea surface cooling （6-8~C） took place in the SCS where the moving speed of typhoon was only 1.4-2.8 m/s and the mixed layer depth was about 20 m in pre-typhoon period. However, the SST drop at the east of the Philippines is only 1-2~C where the translation speed of typhoon was 5.5-6.9 m/s and the mixed layer depth was about 40 m in pre-typhoon period. So the extent of the SST drop was probably due to the moving speed of typhoon and the depth of the mixed layer. In addition, the region with the largest decline of the sea surface height anomaly can indicate the location where the maximum cooling occurs.
文摘用60 a Hadley气候中心的月平均海温资料,用EOF分析重构了4月份印度洋海温的一致变化型异常,并以此驱动IAP9层大气环流模式,分别研究了海温异常初期适应阶段、异常当月和气候平均夏季3种时间尺度下大气高度场响应的传播和分布特征。研究发现,初期适应阶段,高度场响应的垂直传播约需4 d,且受控于整层无辐散约束;冷暖位相高度响应的水平传播路径差异较大,表现出明显的非对称性。海温异常当月,冷位相会激发出全球纬向Rossby波;而暖位相则激发出两半球洋面上2个大圆波列,且均有显著正压性。对气候平均夏季的北半球冷相位,高度响应表现为太平洋上空的3条异常纬带;对暖相位则表现为太平洋和大西洋上空的2个大圆波列。而南半球的高度场对冷位相响应主要表现为2波结构的绕极驻波,暖相位激发出环球的同心异常纬带。
