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1.
溶解氧在生物活动较小的情况下,与温盐相似,同样具有保守性.本文基于WOD05数据集中实际观测的溶解氧标准层资料,对南海溶解氧的垂直结构及其季节变化进行阐述,指出在浅水陆架区、中央海瓮和吕宋岛以东深水区,溶解氧具有不同的垂向分布特点.霞点分析了深水区的溶解氧垂向结构,发现其极大值存在季节性变化,量值在冬、春较大,夏、秋较小,出现的深度夏季最深,超过50 m,秋、冬较浅且现象小够明显;极小值基本不存在季节变化,出现的深度约860 m;对比温盐关系曲线,发现溶解氧极大值对应着南海次表层水团上界、衰减缓慢的稳定阶段对应次表层水团高盐核心水层、而极小值则对应中、深层水团的交界. 相似文献
2.
基于1986-2008年的中国近海及邻近海域再分析产品(CORA)气候平均海温资料,分别运用S-T法、垂向梯度法和最大曲率点3种温跃层定义计算了南海温跃层上界深度,揭示了南海温跃层季节变化特征。对3种不同定义确定的温跃层上界深度进行比较发现:采用不同定义计算南海温跃层上界深度存在差异,S-T法确定的温跃层上界深度最浅,垂向梯度法其次,最大曲率点法最深;在深水区(水深200 m)运用S-T法计算的温跃层上界深度与垂向梯度法的结果比较一致,都与实际温跃层深度符合较好;在浅水区(水深200 m),垂向梯度法和最大曲率点法可以准确判定无跃区,但对于温跃层深度计算,3种定义误差均较大。 相似文献
3.
掌握南海三维温盐场特征对于研究南海海洋动力环境及其对海洋气候变化的影响具有重要意义。基于海洋再分析数据GLORYS12V1和AVHRR OISST数据,开展了南海温盐空间分布及季节变化分析,以及海表温度对台风过程的响应特征分析。分析结果表明：南海海表温度一般为25～32℃,最高温度出现在8月的黄岩岛附近海域,海表盐度一般为32～35 psu,最高盐度出现在7月的东海附近海域;温盐垂向结构表现为表层高温低盐,随着深度增加温盐季节性变化越小。南海地区温跃层深度存在明显季节变化特征,秋冬季节温跃层深度大于春夏两季。根据“威马逊”台风期间海表温度变化特征分析海表温度对台风过程的响应,台风期间南海水体垂向混合作用增强,海表温度降温明显。 相似文献
4.
基于中国Argo实时资料中心发布的2004年1月至2017年12月Argo全球温盐资料,运用直线定位法和隶属关系,对吕宋岛以东海域(120°~140°E,10°~30°N)水团进行分析,划分出北太平洋次表层水团(NPSSW)和北太平洋中层水团(NPIW)的分布范围。次表层水团位于50~220 m深度,分布在10°~28°N范围内,温度16.61~27.60℃,盐度34.68~35.14,核心范围春夏季较大,秋冬季较小。中层水团位于280~900 m深度,分布在10~30°N范围内,温度3.67~16.55℃,盐度34.11~34.67,核心范围季节变化较弱,整体位于18°N以北。次表层与中层水团核心温盐具有一定的年际变化特征,次表层水团与气候变化相关性较好,核心温度和盐度均存在4 a的变化周期;而中层水团与气候变化相关性较差,核心温度和盐度则分别具有3.5 a和3 a的变化周期。 相似文献
5.
李福荣 《中国海洋大学学报(自然科学版)》1995,(2)
以１９８７年５—６月中日台作黄东海域综合调查的溶解氧资料为主，探讨调查海区溶解氧分布特征与水团的对应关系。指出：近岸水团溶解氧合量高，远海低；上层水团高，下层低。在黄海冷水和东海北部底层冷水的上界出现明显的溶解氧垂直分布最大值及封闭形高氧区。水团边界区，氧跃层明显。溶解氧含量变化与水团温盐特性有关。通过分析发现，溶解氧对鉴别次表层以深各水团，特别对鉴别东海次表层水及黑潮次表层以深各水团，可作为一种有效的指标。 相似文献
6.
1998年夏、冬季南海的水团及其与太平洋的水交换 总被引：3，自引：4，他引：3
根据 1998年夏季和冬季 2个航次的实测资料 ,对南海的水团进行划分和分析 ,并利用1997年 7月和 12月的实测资料 ,对巴士海峡 (吕宋海峡 )和民都洛水道附近的温盐分布进行分析。1998年冬季的资料分析结果表明 ,可将南海外海水划分为 6个水团 ,即南海表层水团 (S)、南海次表层水团 (U)、南海次 -中层混合水团 (UI)、南海中层水团 (I)、南海深层水团 (D)和南海底盆水(B)。 1998年夏季还可在南海中鉴别出黑潮表层水团 (KS)和黑潮次表层水团 (KU) ,但在冬季观测期间无黑潮水越过 119.5°E经线进入南海 ;夏季有苏禄海水在 5 0～ 75 m层经民都洛水道侵入南海。然而 ,1997年夏季和冬季的资料分析表明 :夏、冬两季都有大洋水通过吕宋海峡北段进入南海 ,南段有南海水流入太平洋。这些现象可能与 1998年前后的厄尔尼诺有关。 相似文献
7.
利用日本气象厅(JAMSTEC)所提供的Argo格点温盐资料,系统地研究了棉兰老隆起(Mindanao Dome;MD)的三维结构及变化特征。结果表明,MD的水平位置大致在5°N~10°N,127°E~145°E范围内1个纬向延伸的狭长带状结构。其垂向范围大致在50~600m之间,强度在次表层100~200m附近最显著。温盐结构表现为深层低温、低盐水向上涌升增强,温跃层深度变浅,上混合层厚度变薄的特征。功率谱分析结果表明,MD具有明显的季节变化信号,表现为冬强秋弱,具有一年和半年的较为显著的变化周期。在El Ni珘no期间,MD的次表层水温明显下降,MD增强。局地风场对MD的变异起着重要作用,MD的变化与该处风应力旋度的变化的相关系数为-0.346。MD的变化和暖池的变化具有较好的负相关关系,在暖池发展比较充分时候,由于其暖水范围增大,暖水厚度增加,在某种程度上会抑制MD的发展;反之亦然。 相似文献
8.
1992年春季以及1994年夏季，台湾海峡两岸曾同时出动多艘研究船在南海东北部海域协力执行了两次较大区域的水文调查作业。根据温盐曲线之类聚情形，发现盐温变率比（即温盐曲线斜率之倒数）是除了盐度极大值与盐度极小值外另一个简单又好用的温盐特征参数。此值乍视之下仅与温盐曲线之形状有关，但因其隐涵了时间的效应，故可有效反映出水团之变性程度，对分析、推断水团之流径甚有助益。经分析、对比温盐参数与动力高度之水平分布，发现1992年春季观测时之地转流场与温盐参数二者趋势不甚一致，但1994年夏季之测情却有很好的共通性，似乎表示后者之流况系处于稳定状态，因此观测现象应较具代表性。资料亦显示：不论春、夏，在吕宋岛西北角与东沙群岛之间的广大海域主要是受成群的气旋型环流所控制，此气旋群之范围因季节而异，夏季时其势力较向东、向北扩展，因而在巴士海峡、巴林塘海峡阻挡住黑潮区之外洋次表层与中层水团向西伸展，但外洋水团仍可在台湾岛南端逸入南海东北部，然后被南海内部流系辗转带往南海腹地。春季时，外洋水团虽可占据气旋群环流场东北方之台湾西南外海，但并未见能长驱直入南海内部者，仅有部分经变性后之外洋水被气旋群西侧之环流带往南海中部，表示逸入过程是南海与西菲律 相似文献
9.
本文利用中国海洋大学极地变化重点实验室提供的2008年3月与7月白令海陆架水资料,对白令海200 m内水域温盐及水团进行了分析和对比,对白令海陆架区冬季水团形成机制做了初步的探讨。白令海冬季陆架水的温盐结构垂向均匀;夏季层化明显,存在垂直温盐跃层;白令海由夏季表层水和冬季水两种水团组成;白令海冬季残留水团在陆架区水深20 m处即出现,最低温度较大洋深处冬季水温偏低。 相似文献
10.
本文利用OFES模式0.1°×0.1°高分辨率温盐、流速和海面高度（SSH）数据,分析eSQG方法在南海垂向流速诊断中的适用性和南海垂向流速的时空变化特征。结果表明,基于SSH和eSQG的诊断垂向流速ωeSQG与OFES模拟“真值”垂向流速ωOFES整体量级基本相当,为O（10?5 m/s）,空间上呈现北强南弱。深海盆（水深大于1 000 m）ωeSQG与ωOFES的水平空间分布的相关系数rs在次表层150 m左右达到最大,高于南海全海域的空间相关系数,表明eSQG在远离边界的深水区更有效。季节上,ωeSQG总体夏强冬弱,与ωOFES的相关系数rs冬季大、夏季小,表明eSQG更适用于冬季南海垂向流速的诊断。eSQG诊断垂向流速在台湾西南部和越南以东适用性更高,与ωOFES的时间相关系数rt超过0.6;海盆南部和西北部陆架区诊断效果较差,时间相关系数rt多小于0.2。同一区域ωeSQG和ωOFES空间相关系数存在18～55 d的周期变化。分析显示,海面高度与海面密度同相位分布时,ωeSQG与“真值”ωOFES更接近。时间分辨率对eSQG诊断效果几乎无影响,空间分辨率降低到0.25°时rs整体增大,说明eSQG在中尺度诊断效果更好。 相似文献
11.
The analysis of the structure of the cryolithozone, facies, and thicknesses of the Quaternary sediments and the results of the physicochemical mathematical modeling of the modern shelf of the western part of the Laptev Sea support the influence of the Late Pleistocene glaciations on the heat conditions and the distribution of the permafrost in the area. A ～200-m thick glacier formed under aerial conditions from atmospheric precipitation represented the metamorphosed snow cover. According to the modeling, the long-living (from 60?50 to 10?4 ky) glacier reduced the thickness of the permafrost rocks in the reviewed shelf area for 280–360 m. The Holocene marine transgression additionally decreased the thickness from 50–140 m on the inner shelf to 220–350 m on the outer shelf. The modern submarine cryolithozone 450-0 m thick is wide-spread in the studied region from the coast to the shelf boundary (isobaths of 130–140 m), where it pinches out at a distance of ～380 km from the coast at a depth of ～250 m above the sea level. 相似文献
12.
We analyze the components of the carbon system of the Sevastopol bay waters and the balance of main sediment-forming substances
using the data of field investigations in 1998–2008. The interannual variations of total inorganic carbon and the equilibrium
partial pressure of carbon dioxide in the bay water are noted. An increase in the flux of carbon dioxide into the bay and
in the content of organic carbon in bottom sediments is revealed, and an explanation of this phenomenon is given. The priority
accumulation of organic carbon in the sediments of the bay is established. We assess the interannual variation in the relative
abundances of organic and inorganic carbon as an index of the carbon cycle stability. 相似文献
13.
We generalize and analyze the state of investigations of the influence of river waters on the hydrologic structure of the
Black Sea. Specific features of the water, regime and hydrography of rivers flowing into the sea, data on the discharge of
rivers, and intrayear and interyear variability of the discharge are presented. We discuss and analyze works studying the
transformation of river waters, routes of desalinized sea waters, and their influence on the thermohaline structure and dynamic
regime of the sea.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
14.
双壳贝类血淋巴中儿茶酚胺的检测方法初步研究 总被引：1，自引：0，他引：1
研究的目的是探索一种检测双壳贝类血淋巴中儿茶酚胺含量的方法。以栉孔扇贝(Chlamysfarreri)和长牡蛎(Crassostreagigas)为实验对象,研究了取样、抗氧化剂、氧化铝用量以及Tris缓冲液用量等对实验结果的影响。结果表明,高效液相色谱电化学检测器法(HPLC-ECD)可以灵敏高效地对双壳贝类血淋巴中儿茶酚胺进行定性、定量检测。实验表明,取样时间最长不超过1.5min;还原性谷胱甘肽作抗氧化剂效果较好;前处理各试剂与血样量的最适配比为血样量1.5mL,Tris缓冲液(1.5mol/L,pH8.6)1mL和氧化铝25mg;水洗后离心并尽可能吸干氧化铝中的水分。去甲肾上腺素、肾上腺素和多巴胺的回收率分别为53%~69%、47%~73%和48%~56%。 相似文献
15.
为研究黄河入海径流变化条件下河口附近海域盐度扩散特征,以更好地保护河口海域生物资源多样性,本文以黄河下游利津水文站的长序列实测径流数据资料为基础,利用近海水动力模型FVCOM,分析径流变化对黄河口海域盐度的影响规律。结果表明：黄河口与莱州湾之间存在顺时针的环流系统,在余流作用以及涨落潮方向的影响下,黄河冲淡水长期向莱州湾扩散;丰水期黄河冲淡水几乎影响了整个莱州湾,27盐度锋可以到达莱州湾中部,27等盐线的表层包络面积为2 665.61 km2,占莱州湾的1/4左右,枯水期低盐度水只有向南扩散的趋势,27以下的低盐度水集中分布在黄河口门附近,27等盐线的表层包络面积只有199.65 km2;5月份,随着入海径流量增加,27等盐线扩散的范围、距离、方向都会发生明显变化。在对近海生物资源有迫切保护需求的情景下,适当减少其他用水户供水量以增加入海生态径流量,可以有效改善黄河口海域附近的盐度情况,为生物资源的生长繁殖创造良好条件。 相似文献
16.
V. A. Ivanov S. P. Lyubartseva N. Mikhailova N. B. Shapiro 《Physical Oceanography》2001,11(6):509-524
We analyze the results of numerical calculations performed according to the three-dimensional interdisciplinary model of an
ecological system of the Black-Sea shelf zone near the estuary of the Danube. The complete system of equations of hydrothermodynamics
is solved together with transport equations of the advection-diffusion-reaction type used to describe the transformation of
a substance (nitrogen) between the components of the characteristic vectors of the ecosystem: plankton, detritus, and biogenic
elements (nitrates). We describe the distinctive features of the circumcontinental distribution of components obtained as
a result of numerical experiments and present arguments for the conclusion that the ecosystem of the Danube estuary water
area plays the role of a buffer zone between the press of the Danubian biogenic pollutions and the neighbouring areas of the
shelf zone and open sea.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
17.
The authors have previously determined that the effectiveness and failure pattern of the ice cover caused by flexural-gravity waves generated by a submerged body motion near the bottom ice can greatly depend on the depth of the water area. In its turn, the presence of a ledge on the ice surface may affect a wave propagation pattern. This paper presents an experimental study of the bottom contour influence on the deflection and length of flexural-gravity waves. The authors describe a numerical model for the analysis of the deformed state of ice caused by hydrodynamic loads due to a submarine motion, taking into account the bottom contour. The experiments are carried out in the ice tank. The results of calculations and experiments are compared. 相似文献
18.
Relationship between the path of the Kuroshio in the south of Japan and the path of the Kuroshio Extension in the east 总被引：2，自引：0，他引：2
A relationship between paths of the Kuroshio and Kuroshio Extension (KE) is investigated, using the satellite-derived altimetry
dataset of 1993–2008. When the Kuroshio takes the nearshore nonlarge meander path or typical large meander path and resultantly
goes through the deeper channel (about 2500 m) of the Izu-Ogasawara Ridge, the KE path adopts a relatively stable state with
the two quasi-stationary meanders. On the other hand, when the Kuroshio takes the offshore nonlarge meander path and then
passes over the shallower part of the Ridge (about 1000 m), the KE path tends to be convoluted, i.e., an unstable state. 相似文献
19.
Ten years of semistationary studies of the interaction of the ice cover and the coastal relief of the Kandalakhsa Gulf in the White Sea allowed us to reveal the peculiarities of these processes in the warm and cold years and the mechanisms of the origination of ice forms, including ice tents, which govern the character of the tidal flats. Three dynamic fast ice zones are distinguished by their geomorphological location, morphology, and ice dynamics. The dependence of the mechanisms and volumes of the enrichment of the fast ice in the sediments on the coastal zone??s relief was established. At the coast of the Kindo Peninsula (Velikaya Salma Strait), the ice mostly contains fine-sandy sediments. Coarser sediments, including boulders, are occasional and frozen into the ice at the contact of the fast ice and the bottom. At the expense of the ice??s spreading by 4?C6 times in the warm years and 2?C4 times in the cold years, several thousand tons of sediments mostly from the tidal flat??s surface (100?C700 m3 from 1 km of coast in the wide tidal flats and <50 m3 on the steep coasts) are delivered to the water area. 相似文献
20.
I. E. Timchenko A. A. Primalenny V. D. Yarin E. F. Vasechkina E. M. Igumnova 《Physical Oceanography》2001,11(4):367-378
We use many-year archival observations of hydrologic and hydrobiologic state of the Sea of Azov for the identification of
the structure of a model of its ecosystem. The ecosystem model, supplemented with expert estimates of bioresource consumption
(fish reserve), contamination level, and possible ecologic fines for violation of the sea natural state, is formalized by
the method of system dynamics. Hereat, the major part of influence functions is found in terms of observational data with
application of self-organization algorithms. We also present the results of simulated experiments with the model of the ecosystem,
which enable us to analyse scenarios of its behaviour under the influence of various external factors (wind, river discharge,
water exchange with the Black Sea, etc.).
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献