共查询到19条相似文献，搜索用时 187 毫秒
1.
HM2000 型剖面浮标是一种新颖的国产海洋观测仪器,可以长期在海上自由漂移并连续测量 0~2 000 m 水深内的海水温、盐度剖面数据,已被国际 Argo 组织用于全球 Argo 实时海洋观测网建设和维护。 详细介绍了该型浮标的工作原理、结构、功能和主要技术指标等,并与 APEX 型浮标进行了比较分析, 表明了 HM2000 型剖面浮标具有明显的功能优势,且测量的温、盐度质量是有足够保证的,完全可以替代国外浮标用来主导建设我国的 Argo 区域海洋观测网。 相似文献
2.
1 国际 Argo计划国际 Argo计划提出施放 3 0 0 0个剖面浮标组成一个海洋观测网 ,以便实时观测全球海洋上层的温、盐度结构。每个浮标之间距离约为 3 0 0 km。浮标将被设置在 2 0 0 0 m水深附近漂移 ,且每隔 1 0天上浮一次 ,把测量的温、盐度剖面资料和位置信息通过卫星传送到设在陆上的接收站。然后 ,浮标再次下沉到预定的深度进行新一轮循环。浮标的使用寿命为 4年。这些浮标的工作原理与大气无线电探测器相似。2 实施 Argo计划的意义利用 Argo浮标进行全球次表层观测 ,并结合覆盖全球海洋表面的卫星观测 ,将会提高业务预报和科学研究… 相似文献
3.
基于Argo浮标的热带印度洋混合层深度季节变化研究 总被引：2，自引：0，他引：2
根据2004-2005年热带印度洋(30°S以北)的Argo浮标(自持式海洋剖面观测浮标)温度-盐度剖面观测资料,采用位势密度判据(Δσθ=0.03 kg/m3),针对每个Argo浮标的温度-盐度观测剖面确定了海洋混合层的深度,然后采用Krig插值方法构建了3°×3°空间分辨率的月平均网格化混合层深度产品。通过与已有气候平均混合层深度资料的比较表明了该产品的合理性,在此基础上进一步对热带印度洋海盆尺度的混合层深度空间特征和季节变化规律进行了讨论。研究结果表明,Argo浮标资料可用于热带印度洋混合层变化的研究,为进一步研究热带印度洋海-气相互作用提供了基础资料。 相似文献
4.
参考数据集对Argo剖面浮标盐度观测资料校正的影响 总被引：4，自引：0，他引：4
国际Argo计划采用新颖的Argo剖面浮标来监测全球大洋中上层的变化,对浮标盐度观测资料进行质量控制是非常重要的。本文采用历史水文观测资料集得到的温-盐度(-S)关系,并利用Wong等人开发的WJO延时模式盐度校正方法,对电导率传感器出现漂移、偏移等故障的Argo剖面浮标盐度资料进行校正。对影响校正结果的历史水文资料集(或参考数据集)的选取进行了初步研究,并在不同的海区进行试验。结果表明,选取合适的参考数据集可以提高盐度校正的精度。 相似文献
5.
6.
Argo-认识和预测气候变化的全球海洋观测计划 总被引：1，自引：2，他引：1
1 全球海洋观测网 (Argo)为了解全球气候的变化 ,海洋学界正在做一项雄心勃勃的事业 ,即设计并部署一个全球海洋观测系统 ,以便对海洋从季节到十年间的变化作前所未有的长期跟踪观测。这项计划的实施 ,将使人类对气候的认识和预测向前迈出一大步。全球海洋观测系统的现场支柱就是 Argo剖面浮标网 ,将为人类提供一个全球海洋次表层数据库。Argo剖面浮标观测网将由 3 0 0 0个自动仪器组成 (图 1 ) ,每个浮标每隔 1 0天发送一组取自 2 0 0 0 m到海面的温度和盐度剖面资料 (图 2、3 )。在全球大洋内每隔大约 3个经纬度布设一个浮标 ,其数据通… 相似文献
7.
《海洋通报(英文版)》2021,(1)
综合利用Argo温、盐度观测剖面资料,以及中国南极科学考察沿途获取的XBT温度剖面,分析探讨了苏拉威西海域(117～127°E,0～8°N)上表层的温度和盐度的气候态分布和变化特征。结果表明,苏拉威西海域的温度范围约为2.5～30°C,盐度约为33.2～35.1‰;与垂向变化相比,温、盐度水平梯度均较小,温度随深度的增加逐渐降低,而盐度则呈现先增后减再增,两低一高的分布特征,整个海域表层呈现出高温低盐的分布特征,次表层温度稍有降低,盐度增加,中层则表现为高温高盐,500 m以深,温、盐度趋于均匀,底层呈现低温高盐的特性;50～150 m深度处,存在明显的温跃层,夏季(7～9月)跃层深度小于90 m,冬季(1～3月)则平均约为110 m,而4月份的观测剖面上表现出的温跃层深度明显比11月份深,苏拉威西海域中部的温跃层相对也较深。 相似文献
8.
综合利用Argo温、盐度观测剖面资料,以及中国南极科学考察时沿途获取的XBT温度剖面,分析探讨了苏拉威西海域(117°E—127°E,0°—8°N)上表层温度和盐度的气候态分布和变化特征。结果表明,苏拉威西海域的温度范围约为2.5℃～30℃,盐度约为33.2‰～35.1‰。与垂向变化相比,温、盐度水平梯度均较小,温度随深度的增加逐渐降低,而盐度则呈现先增后减再增,两低一高的分布特征。整个海域表层呈现出高温低盐的分布特征,次表层温度稍有降低,盐度增加,中层则表现为高温高盐,500 m以深区域温、盐度趋于均匀,底层呈现低温高盐的特性。50～150 m深度处,存在明显的温跃层,夏季(7—9月)跃层深度小于90 m,冬季(1—3月)跃层深度平均约为110 m,而4月份的观测剖面表现出的温跃层深度明显比11月份深,苏拉威西海域中部的温跃层相对也较深。 相似文献
9.
南海自动剖面浮标轨迹模拟系统包括高分辨率模式流场、拉格朗日追踪模型和垂向浮标运动参数化方案等三个核心部分。该系统可在南海范围内模拟两类自动剖面浮标:传统自动剖面浮标(停滞深度为1000m,最大下潜深度为2000m)和新型深海自动剖面浮标(停滞深度为距海底500m)。通过对南海现有的6个传统浮标的模拟,该系统可以预测其100d内的漂流轨迹。通过与真实浮标轨迹数据的对比,验证了该模拟系统的准确性。此外,根据该系统,我们初步探讨了深海自动剖面浮标阵列(时空分辨率为2°×2°×30d)在南海内区布放方案的可行性。该模拟系统的建立和完善将有助于对现有传统剖面浮标布放策略进行优化,并对未来深海剖面浮标在南海的推广应用提供初步的理论依据。 相似文献
10.
南海自动剖面浮标轨迹模拟系统包括高分辨率模式流场、拉格朗日追踪模型和垂向浮标运动参数化方案等三个核心部分。该系统可在南海范围内模拟两类自动剖面浮标: 传统自动剖面浮标(停滞深度为1000m, 最大下潜深度为2000m)和新型深海自动剖面浮标(停滞深度为距海底500m)。通过对南海现有的6个传统浮标的模拟, 该系统可以预测其100d内的漂流轨迹。通过与真实浮标轨迹数据的对比, 验证了该模拟系统的准确性。此外, 根据该系统, 我们初步探讨了深海自动剖面浮标阵列(时空分辨率为2°×2°×30d)在南海内区布放方案的可行性。该模拟系统的建立和完善将有助于对现有传统剖面浮标布放策略进行优化, 并对未来深海剖面浮标在南海的推广应用提供初步的理论依据。 相似文献
11.
我国Argo浮标的设计与研究 总被引：6，自引：1，他引：5
自沉浮式剖面探测浮标是一种海洋观测平台,首先应用在国际Argo计划,故又称之为Argo浮标,专用于海洋次表层温、盐、深剖面测量。仪器布放后自行在大海中工作2a以上,直至电源耗尽;2004年11月8日实验的Argo浮标潜入深度已达到1900m,历时两年的浮标研究工作,在下潜深度、上浮水面、剖面测量、数据处理、卫星传递数据等功能上已经达到国际Argo组织的要求。文章详细阐述了剖面浮标的设计与研制内容和各种试验项目及所得数据,不仅为浮标设计提供科学的实测数据,还为今后该仪器产品化进程提供大量可靠依据和检测方法。 相似文献
12.
Gary B. Brassington Nicholas SummonsRick Lumpkin 《Deep Sea Research Part II: Topical Studies in Oceanography》2011,58(5):559-573
New insights into the Lagrangian and eddy dynamical processes within the East Australian Current (EAC) and the Tasman Sea are presented. We briefly discuss the past campaigns undertaken to observe the EAC and the Tasman Sea eddies as well as the motivation to renew the deployment of drifting buoys into the EAC and the Tasman Sea. The specific features discussed are motivated by the recent observing campaigns using drifting buoys and the availability of high spatial- and temporal-resolution estimates of the ocean state and circulation from eddy resolving models. The interpretation of these features is also aided by other components of the ocean observing system. The dynamics presented includes: (a) transient EAC separation through a vortex dipole, (b) stratified vortex mergers and secondary circulation of EAC eddies, (c) eddy networks in the Tasman Sea and (d) formation and propagation of the EAC separation point. The importance of these dynamical features to the EAC and the Tasman Sea and their implications for the observing system and modelling are discussed. 相似文献
13.
Radii and angular velocities in the motions of drifting buoys deployed in the Kuroshio are estimated by fitting circles to the trajectories of two drifting buoys, one with a drogue at 300 m depth and the other at 800 m depth. The buoys were deployed in the Kuroshio where it was flowing counter-clockwise around the large cold water mass south of Honshu. The same technique was applied to two drifting buoys with drogues at 300 m depth placed in the Kuroshio where it flowed clockwise around Oshima Island in Sagami Bay. The centrifugal forces were 7% and 6% as large as the Coriolis forces in the Kuroshio around the cold water mass, and they were –56% and –42% as large as the Coriolis forces in the current around the Oshima Island. The temperature gradient observed in the Oshima-West Channel suggested that the pressure gradient there was smaller due to the centrifugal force acting against the Coriolis force than the pressure gradient to be balanced with the Coriolis force. 相似文献
14.
目前尽管国内近海浮标实现了产品化，但深远海尚无定型可靠的深海综合观测浮标系统，基于此，中国科学院海洋研究所设计制作了深海综合观测浮标系统，其浮标体为柱台型结构，采用单点锚泊系留。整个系统主要由浮标体、系留子系统、观测子系统、数据采集处理控制子系统、通信子系统、供电子系统、检测子系统、安全报警子系统和岸基数据接收处理子系统等9部分组成。浮标系统通过搭载不同类型的传感器，实现对风速/风向、气温、相对湿度、气压、能见度、雨量、波浪、表层水温、表层盐度、表层溶解氧、表层叶绿素、表层浊度、剖面流速流向、剖面温盐深（最大深度可达1 000 m）、方位及浮标位置等要素进行实时观测，从而完成对海洋气象、水文和水质等要素的长期、连续、自动监测，并支持铱星和北斗等卫星通信方式，将观测数据实时的传输到岸基数据接收处理系统。近年来，深海综合观测浮标系统在热带西太平洋海域连续进行了4次海上应用，每次应用时间长达1 a。它提供了第一手的大洋上层和海气界面长时间序列的实时连续观测资料，促进了关于气候变化和深海大洋的研究工作。所研制的深海浮标达到目前国际同类产品（美国ATLAS浮标、日本TRITON浮标）的先进水平，并且在水下感应耦合传输等方面进行了创新，形成了自有特色。 相似文献
15.
海洋科学的发展离不开精确的数据,然而各种海洋观测仪器在复杂的海洋环境中作业难免产生测量误差,导致观测数据需要进行实时(或延时)质量控制。中国Argo计划在搭载多个航次布放剖面浮标的同时,对航次中获取的船载CTD(conductivity, temperature, and depth)仪观测资料、自动剖面浮标观测资料以及实验室高精度盐度计测量数据进行了实时比对。分析结果显示,利用实验室高精度盐度计对现场观测数据尤其是船载CTD仪观测资料进行质量控制,于温盐数据(特别是深层)的实时/延时校正非常重要;如某航次未经标定的船载CTD仪所测1000dbar以深范围内海水盐度,与实验室高精度盐度计的差值达到±0.1左右,远远落后于国内海洋调查规范对盐度准确度±0.02的一级测量要求,该具体实例更加突显了船载CTD仪在航次前后送往权威部门进行检测的必要性和重要性,从而确保每个航次获取的CTD资料的质量。建议有条件的情况下,在进行深海大洋船载CTD仪观测时要进行现场实验室高精度盐度计的质量控制工作及比对试验,以提高我国深海大洋观测数据的质量。 相似文献
16.
《Oceanologica Acta》1999,22(5):453-471
Hydrographic data were collected from 3 to 10 September 1996 along two transects; one at 18° N and the other at 90° E. The data were used to examine the thermohaline, circulation and chemical properties of the Bay of Bengal during the withdrawal phase of the southwest monsoon. The surface salinity exhibited wide spatial variability with values as low as 25.78 at 18° N / 87° E and as high as 34.79 at 8° N / 90° E. Two high salinity cells (S > 35.2) were noticed around 100 m depth along the 90° E transect. The wide scatter in T-S values between 100 and 200 m depth was attributed to the presence of the Arabian Sea High Salinity (ASHS) water mass. Though the warm and low salinity conditions at the sea surface were conducive to a rise in the sea surface topography at 18° N / 87° E, the dynamic height showed a reduction of 0.2 dyn.m. This fall was attributed to thermocline upwelling at this location. The geostrophic currents showed alternating flows across both the transects. Relatively stronger and mutually opposite currents were noticed around 25 m depth across the 18° N transect with velocity slightly in excess of 30 cm s−1. Similar high velocity (> 40 cm s−1) pockets were also noticed to extend up to 30 m depths in the southern region of the 90° E transect. However, the currents below 250 m were weak and in general < 5 cm s−1. The net geostrophic volume transports were found to be of the order of 1.5 × 106 m3 s−1 towards the north and of 6 × 106 m3 s−1 towards west across the 18° N and 90° E transects respectively. The surface circulation patterns were also investigated using the trajectories of drifting buoys deployed in the eastern Indian Ocean around the same observation period. Poleward movement of the drifting buoy with the arrival of the Indian Monsoon Current (IMC) at about 12° N along the eastern rim of the Bay of Bengal has been noticed to occur around the beginning of October. The presence of an eddy off the southeast coast of India and the IMC along the southern periphery of the Bay of Bengal were also evident in the drifting buoy data. 相似文献
17.
Salinity Variations of the Intermediate Oyashio Waters and Their Relation with the Lunar Nodal Cycle
New oceanographic observations in the period 1990–2015 revealed significant salinity variations in the Oyashio Current. In the last 26 years, the salinity of the upper layer decreased by 0.2 PSU. The most rapid changes in salinity and temperature have been observed in the last five years. The time series of salinity measurements is characterized by the high-amplitude fluctuations synchronized with the lunar nodal cycle (18.6 years); i.e., high salinity is observed in the period of strong tidal currents. Modulation of diurnal tidal currents with the K1 and O1 periods in the lunar nodal cycle is significant [8, 9]. The amplitude was maximal in 1988 and 2006 and minimal in 1997 and 2015. The characteristics of tidal currents in the Oyashio Current and Sea of Okhotsk are considered based on available data of drifting buoys over the Kruzenshtern and Kashevarov banks. The amplitude of salinity variations synchronized with the lunar cycle is approximately 0.1 PSU; therefore, it has made a significant contribution to the salinity decrease in recent years. 相似文献
18.
E. G. Lunev V. A. Ivanov A. G. Kirichenko E. M. Lemeshko S. V. Motyzhev 《Physical Oceanography》2011,20(5):366-378
The autonomous drifting buoys equipped with satellite link turn into one of the most important components of the global system
of operative observations of the ocean and the surface layer of the atmosphere. However, on the regional level, the problem
of analysis of the surface circulation of waters in the coastal zone and sea straits remains quite urgent because the available
drifters cannot be used in this case due to their sizes and long intervals between measurements. We present the results of
development and testing of a new drifter system aimed at measuring currents. The system is based on the use of buoys operating
at depths less than 1 m. To improve the space-and-time resolution of measurements, the buoys are equipped with receivers of
the global positioning system (GPS) and GSM modems for the data transfer via cellular communication networks. The drifter system guarantees the possibility of determination
of the coordinates of buoys with a resolution of 3 min in time and 14 m in space. We describe the specific features of the
design of the proposed information-and-measuring drifter system and present the first results of application of new buoys
called “minidrifters” for the pilot monitoring of currents in the Kerch Strait. 相似文献
19.
SUN Lu ZHENG Quan''an TANG Tswen-Yung CHUANG Wen-Ssn LI Li HU Jianyu WANG Dongxiao 《海洋学报(英文版)》2012,31(2):25-32
During the South China Sea monsoon experiment (SCSMEX),three autonomous temperature line acquisition system (ATLAS) buoys with acoustic Doppler current profiler (ADCP) were moored in the South China Sea to measure temperature,salinity and current velocity.Typhoon Faith passed through about 250 km south to one of the mooring buoys located at 12 58.5 N,114 24.5 E from December 11 to 14,1998.The data analysis indicates that the typhoon winds induce a great increase in the kinetic energy at near-inertial frequencies with two maxima in the mixed layer and thermocline.The near-inertial oscillations were observed at the upper 270 m in the wake of Typhoon Faith.The oscillations were originally excited in the sea surface layer and propagated downward.The amplitudes of the oscillations decrease with depth except in the thermocline.The near-inertial oscillation signals are also remarkable in temperature and salinity fields. 相似文献