期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
Seasonal Variability of the Yellow Sea/East China Sea Surface Fluxes and Thermohaline Structure 被引量:12
1
作者 peter chu 陈玉春 Akira KUNINAKA 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2005年第1期1-20,共20页
We use the U.S. Navy's Master Oceanographic Observation Data Set (MOODS) forthe Yellow Sea/ East China Sea (YES) to investigate the climatological water mass features and theseasonal and non-seasonal variabilities... We use the U.S. Navy's Master Oceanographic Observation Data Set (MOODS) forthe Yellow Sea/ East China Sea (YES) to investigate the climatological water mass features and theseasonal and non-seasonal variabilities of the thermohaline structure, and use the ComprehensiveOcean-Atmosphere Data Set (COADS) from 1945 to 1989 to investigate the linkage between the fluxes(momentum, heat, and moisture) across the air-ocean interface and the formation of the water massfeatures. After examining the major current systems and considering the local bathymetry and watermass properties, we divide YES into five regions: East China Sea (ECS) shelf, Yellow Sea (YS) Basin,Cheju bifurcation (CB) zone, Taiwan Warm Current (TWC) region, Kuroshio Current (KC) region. Thelong term mean surface heat balance corresponds to a heat loss of 30 W m^(-2) in the ESC and CBregions, a heat loss of 65 W m^(-2) in the KC and TWC regions, and a heat gain of 15 W m^(-2) in theYS region. The surface freshwater balance is defined by precipitation minus evaporation. The annualwater loss from the surface for the five subareas ranges from 1.8 to 4 cm month^(-1). The freshwater loss from the surface should be compensated for from the river run-off. The entire watercolumn of the shelf region (ECS, YS, and CB) undergoes an evident seasonal thermal cycle withmaximum values of temperature during summer and maximum mixed layer depths during winter. However,only the surface waters of the TWC and KC regions exhibit a seasonal thermal cycle.. We also foundtwo different relations between surface salinity and the Yangtze River run-off, namely, out-of-phasein the East China Sea shelf and in-phase in the Yellow Sea. This may confirm an earlier study thatthe summer fresh water discharge from the Yangtze River forms a relatively shallow, low salinityplume-like structure extending offshore on average towards the northeast. 展开更多
关键词 yellow sea east China sea surface net heat flux fresh water flux seasonalvariability thermohaline structure
下载PDF
The Role of the Halted Baroclinic Mode at the Central Equatorial Pacific in El Nifn Event 被引量:1
2
作者 孙即霖 peter chu 刘秦玉 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2006年第1期45-53,共9页
The role of halted "baroclinic modes" in the central equatorial Pacific is analyzed. It is found that dominant anomaly signals corresponding to "baroclinic modes" occur in the upper layer of the equatorial Pacific... The role of halted "baroclinic modes" in the central equatorial Pacific is analyzed. It is found that dominant anomaly signals corresponding to "baroclinic modes" occur in the upper layer of the equatorial Pacific, in a two-and-a-half layer oceanic model, in assimilated results of a simple OGCM and in the ADCP observation of TAO. A second "baroclinic mode" is halted in the central equatorial Pacific corresponding to a positive SST anomaly while the first "baroclinic mode" propagates eastwards in the eastern equatorial Pacific. The role of the halted second "baroclinic mode" in the central equatorial Pacific is explained by a staged ocean-atmosphere interaction mechanism in the formation of El Nifio: the westerly bursts in boreal winter over the western equatorial Pacific generate the halted second "baroclinic mode" in the central equatorial Pacific, leading to the increase of heat content and temperature in the upper layer of the central Pacific which induces the shift of convection from over the western equatorial Pacific to the central equatorial Pacific; another wider, westerly anomaly burst is induced over the western region of convection above the central equatorial Pacific and the westerly anomaly burst generates the first "baroclinic mode" propagating to the eastern equatorial Pacific, resulting in a warm event in the eastern equatorial Pacific. The mechanism presented in this paper reveals that the central equatorial Pacific is a key region in detecting the possibility of ENSO and, by analyzing TAO observation data of ocean currents and temperature in the central equatorial Pacific, in predicting the coming of an El Nino several months ahead. 展开更多
关键词 halted baroclinic mode central equatorial Pacific staged atmosphere-ocean interaction mechanism El Nino
下载PDF
多酶制剂能使猪饲料营养最大化
3
作者 代红霞 石永峰 +3 位作者 Ronaldo Mateo Stevenson Hawang Dae Ryu peter chu 《国外畜牧学(猪与禽)》 2008年第3期41-42,共2页
由猪传统日粮所用饲料原料带来的成本和供应问题促使人们寻找更新的饲料原料,并以求最大程度地利用所选原料中的养分。
关键词 饲料营养 最大化 酶制剂 饲料原料 日粮 养分
下载PDF
西北太平洋等位势密度面上的东向副热带逆流 被引量:4
4
作者 李荣凤 游小宝 peter chu 《中国科学(D辑)》 CSCD 北大核心 2004年第11期1083-1089,共7页
用美国海军高分辨率气候月平均温盐资料和等位势密度面P-矢量方法,计算了西北太平洋各月等位势密度面环流.主要讨论西北太平洋副热带流涡内部东向副热带逆流(简称:STCC)的空间分布、垂直结构、体积输送及其附近的涡旋现象.计算结果很好... 用美国海军高分辨率气候月平均温盐资料和等位势密度面P-矢量方法,计算了西北太平洋各月等位势密度面环流.主要讨论西北太平洋副热带流涡内部东向副热带逆流(简称:STCC)的空间分布、垂直结构、体积输送及其附近的涡旋现象.计算结果很好地再现了STCC的一些观测特征,并且还揭示了STCC在等位势密度面上呈现的一些新现象:(1)在24.6 σθ面上,STCC的空间分布、源地和流动态势都有很强的季节变化,1-3月份不存在STCC;(2)5-10月,日本以南黑潮逆流的一个分支汇入了STCC,使得STCC的流速增强,流幅显著地加宽;(3)流速矢量场明显地表现出:STCC和它附近的一些涡旋伴随而生,STCC存在时它附近总伴随着一些涡旋,当STCC消失时涡旋也就消失了;(4)通过137.5°E断面,STCC的输送量夏季最强,8月份最大输送量达6.9 Sv(1 Sv三106m3/s),春、秋季较弱,4和11月份的输送量分别为1.7和1.6 Sv,输送主要集中在24.0≤σθ≤25.0面之间;(5)纬向流沿137.5°E断面的分布表明,STCC的流核位于24.3-24.7σθ之间. 展开更多
关键词 涡旋 西北太平洋 位势 空间分布 黑潮 环流 矢量方法 月份 密度 热带
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部