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Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

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Page 1: Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

Review of Meteorological Data Sharing Project in China

Anyuan XIONG

(National Meteorological Information Center, CMA, CHINA)

Page 2: Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

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OUTLINE

Background

Sharing strategies and concerning technical standards

Datasets Development

Data-sharing System

Data Services

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Background

1. Meteorological data is one of the most widely used data.

2. ISSUEs: The notion about data service Great amount of data produces continuously ----How to manage it? A less amount of shareable data ----How to develop shareable products? A low capacity to share the data ----How to effectively make the data available?

Page 4: Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

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In December 2001,under the support of the MOST, CMA Startup the project “Meteorological Data Sharing” to increase the capability of meteorological data sharing service from 2001 to present.

Xiangshan scientific conference

Background

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CMA have done three works:

Develop the sharing strategy and technical standards,Integrate the data resources, Construct the service system.

Background

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In order to standardize the works of meteorological data sharing, we have developed a series of standards and regulations which include two aspects:

1.sharing strategies 2.technical standards about data

management

Sharing Strategies and Technical Standards

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sharing strategies

Meteorological Laws of the People's Republic of China

No.40 Resolution of WMO

Measures for Meteorological Data Sharing (issued by CMA)

Law and Policy

Strategies for sharing

Draft of Classification and Grading of Shared Meteorological Data

Draft of Classification and Grading of Meteorological Data Users

Principle: Sharing data based on Classification and Grading

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Standards and Regulations for DM

Metadata Standards of Meteorological Datasets

Classification , Coding and Naming Rules of Meteorological Datasets

Criterion of Making and Archiving Meteorological Datasets

Description Composing Rules of Meteorological Datasets

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Standards and Regulations for DM

Metadata Standards of Meteorological Datasets

with references of : WMO Core Metadata ISO Geography information metadata standard (ISO

19115) Chinese sustainable development information core m

etadata dictionary

Define: Metadata Entity Database :ID, QC, Time, Coverage, KeyWords, Format, Restrictio

n, Distribution……(attributes)

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Standards and Regulations for DM

Classification, Coding and Naming Rules of Meteorological Datasets

Based on all kinds of attributes of Meteorological data, using line and area classifying method , the meteorological data can be classified 14 classes.

The rules also define the regulations of coding and naming database and its files.

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Standards and Regulations for DM

Criterion of Making and Archiving Meteorological Datasets

Description Composing Rules of Meteorological Datasets

A dataset

Entity of data

Metadata file

Documentation file

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Datasets Development

How to transform the meteorological observations into the shareable products is the most important works in data sharing project.

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Datasets Development

CMA have built several kinds of meteorol. Obs. Networks from 1949

— surface— upper-air— satellite — radar— baseline atmosphere — acid rain — agro-meteorol. — ……

Meteorological Observations

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Datasets Development

Issues: Historical data are recorded in different

medias with different formats. Much of data is not digitized. There are a lot of quality problems with

historical data which should be tested and adjusted.

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Datasets Development

QC Schemes: Quality Control Procedure for surface

observations. Quality Control Procedure for upper-air

observations. Quality Control Procedure for radiation

observation.

Global surface weather datasetGlobal upper-air weather datasetChina surface climate datasetChina upper-air climate datasetChina radiation climate dataset

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Datasets Development

Homogeneity Test and Adjust: Because of station relocating, sensor changin

g, obs. Time altering,….,there are lots of inhomogeneities in the Climatic Series.

To test and adjust these inhomogeneous Climatic Series.

Monthly Temperature dataset (1951-2003)

BeiJing Before After

Page 17: Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

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Serv

ices In recent 5 years, we have developed 105

Data sets, totally more than 1000GB, 13

different types Surface data

upper-air data

Radiation data

Oceanic Meteorol. data

Satellite Meteorol. data

scientific experiments data

……

Datasets Development

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China Meteorological Data Sharing Service Platform is a distributed sharing service system, which be jointly constituted by elementary data service web site, and six provincial data service web sites, at present.

Data Service system

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Data Service system

Page 20: Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

卫星中心科技大楼INTERNE

T

DMZWeb ServiceServers

Fire Wall

Tape library

骨干网

Disk Array

SAN Switches

DataBase Server 1

MonitorServer

Appl.

Server

Switches

Tapes for Archive

Balance Server

I/O Server

Structure of MDSS (NMIC)

DataBase Server 2

Computers

Page 21: Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

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Disk Array & Tape Library

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Sharing Service Web Sites http://data.cma.gov.cn

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Unified MetadatasUnified data classification and namingUnified user recognization

Data Service system

Distributed networks:

----Unified platforms

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Registered users : >600Web visitors : 260,000Data Downloaded : more than 4,800 GB

Data Services

Online Services (from Jan. 2002—Dec. 2005):

(http://cdc.cma.gov.cn)

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Data Services

From Jan. 2002—Dec. 2005,more than 2,700 personsvisited the reception centreand got data 600GB totally.

Offline Services (from National Meteorological Archives)

2003 1 -2004 3年 月 年 月用户领域分布图

56%26%

10%5%

3%

0%

气象机构科研教育政府部门及事业单位部队其他

2003 1 -2004 3年 月 年 月共享服务访问人次统计图

0

10

20

30

40

1月 3月 5月 7月 9月 11月 1月 3月

月份

人次

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Data Services

In addition, there are 21 provincial meteorological bureaus to set up their own data sharing platform on internet and afford data sharing services.

Page 27: Review of Meteorological Data Sharing Project in China Anyuan XIONG (National Meteorological Information Center, CMA, CHINA)

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THANKS!