西太平洋暖池形成与维持的动力学机制     

傅刚  周发琇  朱抱真 《中国海洋大学学报(自然科学版)》1993,(Z2)

建立了一个简单海气耦合模式,其中大气垂直分为两层,为-β平面近似线性模式。在非绝热加热项中包含了对流凝结潜热与大尺度流场之间相互作用的CISK机制以及蒸发、感热与扰动风场之间的反馈机制,并考虑了平均东风区和西风区的不同。由于只研究大气的平均纬向运动,故模式大气中仅含有Kelvin波。海洋模式为一约化重力模式,在一定条件下采用准地转近似,模式海洋中仅保留了Rossby波。对这一海气耦合模式进行特征波动分析,发现海气耦合并不显著改变大气波动的性质。在中东太平洋的平均东风区,大气的Kelvin波仍然增幅和东传。在平均西风区,大气Kelvin波振幅衰减。但耦合作用却使海洋Rossby波的性质发生变化,且波长超过某一临界波长Le的Rossby波的振幅增长。在平均东风区,结论相论。这一理论说明西太平洋暖池的形成与海洋Rossby波有关。在东太平洋,由于是平均东风区,短的Ross-by波振幅增长,不能形成水平尺度很大的“暖池”。而在平均西风的西太平洋区,有可能形成水平尺度很大的“暖池”。  相似文献   

MICROTOPS II手持式太阳光度计海上测量关键技术     

高飞  李铜基  陈清莲  邬海强 《海洋技术学报》2004,(3)

海上的大气参数是卫星遥感器进行大气校正所需的重要参数 ,而手持式太阳光度计的现场测量精度又是能否准确地获得大气参数的重要环节 ,此环节将直接影响大气参数后期数据处理的准确性与可靠性。文章以 MI-CROTOPS II仪器在 2 0 0 2年 6月 HY- 1南海海上试验与 2 0 0 4年 3月天津试验的测量数据为基础 ,针对影响海上测量的一些重要因素与关键技术进行讨论和研究。  相似文献   

Atmospheric forcing, larval drift, and recruitment of capelin (Mallotus villosus)     

Dalley  Edgar L.; Anderson  John T.; deYoung  Brad 《ICES Journal of Marine Science》2002,59(5):929-941

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SBY2-1型空气超声波浪仪     

孙强  孙军 《海洋技术学报》2007,26(4):4-7

SBY2-1型空气超声波浪仪是基于超声测距原理和海面高度变化时间序列数据分析技术的新型波浪仪。论文详细阐述了该仪器的原理、系统组成和工作流程,并介绍了该仪器的计量检定情况和现场的使用情况。  相似文献   

气压长周期变化与月球长周期运动关系的一种模型     

张德宇 《海洋湖沼通报》2003,(2):24-29

从海水的平衡潮理论出发推导出气压长周期变化的一种模型，在此基础上提出了气候潮的概念，并构造出了气候潮的公式，为预报发生在山东乃至全国、全球的特大型气象灾害找到了一条有用的规律。  相似文献   

Distribution and sources of organic carbon, nitrogen and their isotopes in sediments of the subtropical Pearl River estuary and adjacent shelf, Southern China   总被引：17，自引：1，他引：17  

Jianfang Hu  Ping'an Peng  Guodong Jia  Bixian Mai  Gan Zhang 《Marine Chemistry》2006,98(2-4):274-285

The isotopic composition (δ¹³C and δ¹⁵N) and organic carbon (OC) and total nitrogen (TN, organic plus inorganic) content of 37 carbonate-free surficial sediments of the subtropical Pearl River estuary and the adjacent shelf of South China Sea (SCS) was determined. The δ¹³C values indicate that the sediment organic material is a mixture from two sources, terrestrial and marine. Several of the sediments have extremely low (< 4) OC / TN ratios, which could be due to low OC contents and/or to a significant fraction of the TN present as inorganic nitrogen adsorbed on clays. In general, the spatial patterns of OC, TN, δ¹³C and δ¹⁵N are similar. Values are low at the river mouth and on the western coast, suggesting proportionally greater accumulation of terrestrial particulate organic matter relative to marine phytodetritus, which is limited by low productivity in the turbid plume of the Pearl River. Algal-derived organic carbon (al-OC) content is estimated to be low (≤ 0.06%) at the river mouth and higher (up to 0.57%) on the adjacent inner shelf based on a mixing model of end members.  相似文献   

Tracing suspended organic nitrogen from the Yangtze River catchment into the East China Sea   总被引：2，自引：0，他引：2  

Ying Wu  Thorsten Dittmar  Kai-Uwe Ludwichowski  Gerhard Kattner  Jing Zhang  Zhuo Y. Zhu  Boris P. Koch 《Marine Chemistry》2007

Total suspended matter was collected along the Yangtze River (Changjiang) and in the East China Sea in April to May and in September 2003, respectively, to study origin and fate of particulate organic nitrogen. Concentrations of particulate organic carbon (POC), nitrogen (PN) and hydrolyzable particulate amino acids (PAA; d- and l-enantiomers) were higher in the Yangtze Estuary than in the river and decreased offshore towards the shelf edge. In the coastal area, higher values of PAA were observed in the surface layer than in the bottom water. Stable carbon isotope ratios (δ¹³C) of POC increased from − 24.4‰ in the river to values around − 21‰ on the East China Sea Shelf. Dominant amino acids were aspartic acid + aspartine (Asx), glutamic acid + glutamine (Glx), glycine, alanine and serine. The proportions of Asx, Glx and isoleucine were higher in the marine than in the riverine samples contrary to the distributions of glycine, alanine, threonine and arginine. The proportions of d-amino acids were highest in the riverine suspended organic matter (6% of PAA) decreasing towards the shelf edge (1.5% of PAA). d-arginine, not reported in natural aquatic samples so far, was the most abundant d-amino acid in the river. The amino acid composition of the particulate organic matter (POM) in the Yangtze River indicates an advanced stage of degradation of POM. Highly degraded organic matter from soils is probably a main source of POM in the Yangtze River, but the relatively high δ¹³C values and low C/N ratios (7.7 ± 1.6) also indicate contribution from anthropogenic sources. The degraded riverine material was a dominant organic matter source in the estuary, where aquatic primary production had only a small overall contribution. In the East China Sea, gradual settling of riverine organic matter and the addition of fresher phytoplankton impacted the amino acid composition and δ¹³C values, and on the outer shelf relatively fresh phytoplankton-derived organic matter dominated.  相似文献   

应用TM卫星像片对灵山岛地质构造及边坡稳定性的调查     

刘忠敏  李成治  李本川  杨治家  黄海军 《海洋科学》1990,14(6):35-38

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On Conditions of Phytoplankton Blooms in the Coastal Waters of the North-Western East/Japan Sea   总被引：1，自引：0，他引：1  

Yury Zuenko  Marina Selina  Inna Stonik 《Ocean Science Journal》2006,41(1):31-41

Seasonal changes of abundance of the main phytoplankton groups of species (diatoms, dinoflagellates, chrysophytes, small flagellates and cryptophytes) and a set of environmental parameters were investigated in coastal and preestuarine waters of Peter the Great Bay (East/Japan Sea) in May-October of 1998 and 1999. Three periods of mass development were revealed: spring, summer and autumn blooms, with successive change of species. The conditions favourable for each group of species were determined. Driving mechanisms of the succession include nutrients transport through seasonal pycnocline by turbulent mixing, terrestrial nutrients supply by monsoon floods, nutrients supply by upwellings, and light control by the thickness of upper mixed layer. Summer succession could be explained by a simple SST-MLD diagram similar to Pingree S-kh diagram with sea surface temperature as indicator of stratification (S) and mixed layer depth as indicator of light availability (kh).  相似文献   

大尺度海温异常对热带大气Kelvin波的影响     

傅刚 《海洋湖沼通报》1994,(2):167-173

本文用一个简单的斜压两层模式，在热力学方程中只考虑牛顿冷却和感热加热，从理论上分析了大尺度海温异常时感热加热带大气压Ｋｅｌｖｉｎ波的影响。研究发现，牛顿冷却使大气Ｋｅｌｖｉｎ波振幅减，并使波速减慢；感热加热可使得Ｋｅｖｉｎ波波速加快；当海气温差超过某一临界值时，波动趋于不稳定。  相似文献