Argo、GTSPP与WOD数据集及其应用中需注意的若干问题.pdf

第35卷第2期
海洋通报
Vo. 35.No. 2
2016年4月
MARNE SCIENCE BULLETIN
∧pr.2016
Doi:10.118400issn.1001-6392.2016.02.003
rgo、 GTSPP与WOD数据集及其
应用中需注意的若干问题
纪风颖,林绍花,万芳芳,董明媚,刘玉龙
(国家海洋信息中心,天津300171)
摘要:数据集整体的时空覆益率制约了海洋科学研究的时空尺度,而海洋仪器的性能和观测方式直接决定了海洋数据的可
靠性。以观测仪器作为主要衡量指标,结合数据集的时空覆盖率,对以温度和盐度为数据集主体的自持式拉格朗?坏流削面
观测(Ag)数据集、全球温盐剖面数据集( HNPP)、世界海洋数据集(WOD)进行分析和比对,确定了三者关系:An
和(SIP都是WOD的数据源,而TSP中包含了Argo实时数据的80%、在此基础上研究确定了目前温盐数据的主要规测
仪器为Argo浮标、XBT和CTD.并对这三种仪器的误差来源私量缎进行详细分析:由于全球自动观测与传输需求,Argo数
存在电子信号不稳定导致的随机误差,而且在高纬度强温跃层地带出现较强的虚假盐度峰,再是白由漂移的特性导致1%
2%盐度削面漂移超过0.02HKS-78;由丁下降方稈的不断演变,全球半数XHT数据提供者并未供仪器型号,导致数邶整
体的可靠性下降;由」CTD基本采用船载观测,丙此成本高、共数据少且多集中近海。因此在对全球溫盐数据进行应用
时,应综合考虑观测仪器的可性和时空覆盖率,有效实现对资料本身误差和真实海洋现象的甄別
关键词:Argp; GTSPP;WOD
中图分类号:P715
文献标识码
文章编号:1001-(6932(2016)02-0140-09
An introduction to Argo, GTSPP, WOD and their application
JI Feng-ying, LIN Shao-hua, WAN Fang-fang, DONG Ming-mei, [. U Yu-long
National Marine Data and Information Scrvice, Tianjin 300171, China)
Abstract: The datasets restrict the scope and accuracy of marine: scientific research, while reliability of individual marine
station data is directly determined by instrument performance and observation modes. Taking observation instruments as the
main standard and combining w th spatial overage and time span of datasets, this paper analyzes the allilialion o the thre
unair global dalasels of Arsu, GTSPP and WD: Argu and GTSPP are both the data sources of WOD, while% Argo real
time uncorrected data are included in (TS. Base on this study, the error resource and magnitude of the three main
instruments Argo floats, XET and TD are ien ifed: d e o he global a matin servation and Transmission requirements
abnormal Argo data are causer by electronic signal instability, and false salinity spikes ol Argo data ure obvious in high
latitudes where the thermocline s strong, and free drift characteristics lead 1 %o-2 % global Argo Moats salinity drift
exceeding 0.02P -78 Due u e all rale equation olution, near half of e world XBT aa are not provided with the
insrument model and the whole XT dataset relialility decreases the majority of TD are used in shipboard observations
therefore it is costly, less shared and more concentrated on the offshore area. The e ure, integration of the global temperature
and salinity dal should lake inle ac count of observation instrument reliability, time span and spatial coverage, in order to
efficiently identify the real orean phenomena over the error of ocean tala
Keywords: Argo: (ISPP: WOD
收稿日則:2015-07-29;修订用期:2015-09-07
基金项目:国家自然科学基金(41406024)
作者简介:纪风颗(1974-),女、博上、副研究員,主要从半物理海洋数据处理与分析。电子箱:2320130582 Aqq. com
http:/atytb.nmdis.org.cn
万方数据