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GB/T 19721.6-2023: The issue of marine forecasts and warnings - Part 6: The issue of sea current forecasts
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The issue of marine forecasts and warnings - Part 6: The issue of sea current forecasts
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GB/T 19721.6-2023
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Basic data | Standard ID | GB/T 19721.6-2023 (GB/T19721.6-2023) | | Description (Translated English) | The issue of marine forecasts and warnings - Part 6: The issue of sea current forecasts | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A45 | | Classification of International Standard | 07.060 | | Word Count Estimation | 9,919 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-09-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 19721.6-2023: The issue of marine forecasts and warnings - Part 6: The issue of sea current forecasts
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ICS 07:060
CCSA45
National Standards of People's Republic of China
Marine Forecasts and Warnings Issued
Part 6: Issuance of Ocean Current Forecast
Released on 2023-05-23
2023-09-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Forecast release classification 2
4:1 Conventional current forecast 2
4:2 Emergency current forecast 2
4:3 Special current forecast 2
5 Forecast Release Requirements 2
5:1 Requirements for issuing conventional current forecasts 2
5:2 Requirements for issuing emergency ocean current forecasts 2
5:3 Requirements for issuing special ocean current forecasts 2
Appendix A (Normative) Flow Direction and Degree Comparison Table 3
Reference 4
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
This document is part 6 of GB/T 19721 "Issuance of Marine Forecasts and Warnings": GB/T 19721 has published the following parts:
--- Part 1: Storm surge warning issued;
--- Part 2: Wave forecast and warning issuance;
--- Part 3: Sea ice forecast and warning issuance;
--- Part 4: Tsunami warning issued;
--- Part 5: Issuance of sea temperature forecast;
--- Part 6: Current forecast release:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by the Ministry of Natural Resources of the People's Republic of China:
This document is under the jurisdiction of the National Marine Standardization Technical Committee (SAC/TC283):
This document was drafted by: National Marine Environment Forecasting Center, North Sea Forecasting and Disaster Reduction Center of Ministry of Natural Resources, East China Sea Forecasting and Disaster Reduction Center of Ministry of Natural Resources
Disaster Center, South China Sea Forecast and Disaster Reduction Center of the Ministry of Natural Resources:
The main drafters of this document: Li Yun, Kuang Xiaodi, Li Jingshi, Wang Zhaoyi, Zhang Miaoyin, Xu Jiangling, Xiao Wenjun, Zhou Shuihua:
Introduction
GB/T 19721 "Issuance of Marine Forecasts and Warnings" aims to guide the issuance of marine forecasts and warnings, establish the forecast and
The principles, contents and technical requirements of alert issuance are proposed to be composed of six parts:
--- Part 1: Storm surge warning issued: The purpose is to stipulate the classification and content requirements of storm surge warnings in coastal areas of our country:
--- Part 2: Wave forecasts and warnings issued: The purpose is to specify the classification and content requirements of wave forecasts and warnings:
--- Part 3: Sea ice forecast and warning issued: The purpose is to define the classification of sea ice forecasts and warnings in the Bohai Sea and the northern part of the Yellow Sea,
content requirements:
--- Part 4: Tsunami warning issued: The purpose is to stipulate the classification and content requirements of tsunami warnings in coastal areas of our country:
--- Part 5: SST forecast release: The purpose is to stipulate the classification and content requirements of SST forecast in my country:
--- Part 6: Current forecast release: The purpose is to stipulate the classification and content requirements of ocean current forecasting in my country:
Ocean current forecasting is one of the basic elements to describe the marine environment:
Production, marine disaster prevention and mitigation, and marine national defense construction are all of great significance: With the development of coastal national economy, coastal provinces, autonomous regions, municipalities directly under the Central Government,
The county (city) ocean forecasting station also successively releases the ocean current forecast for the sea area under its jurisdiction: In order to further improve the protection work of ocean current forecast for marine environment
Therefore, there is an urgent need to formulate unified ocean current forecast release standards to establish the principles of ocean current forecast release and to unify the classification, content and technology of ocean current forecasts:
Require:
This document focuses on the classification of ocean current forecasts, and divides ocean current forecasts into conventional ocean current forecasts, emergency ocean current forecasts, and special ocean current forecasts:
Three aspects, and put forward the relevant forecast content and technical requirements: It can not only guarantee daily maritime activities, but also meet the needs of maritime emergencies:
The release of ocean current forecast products provides a unified framework, which facilitates the standardized production of ocean current forecast products, promotes the effective use of ocean current forecast functions, and makes the ocean current forecast more effective:
Evaluate the risk of marine disasters in our country well and reduce the loss of marine disasters:
Marine Forecasts and Warnings Issued
Part 6: Issuance of Ocean Current Forecast
1 Scope
This document specifies the classification of ocean current forecasts and the requirements for issuing forecasts:
This document is suitable for use by marine forecasting agencies when conducting ocean current forecasting services:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 15920-2010 Oceanographic Terminology Physical Oceanography
GB/T 39628-2020 Marine Forecast Terminology
3 Terms and Definitions
The following terms and definitions defined in GB/T 15920-2010 and GB/T 39628-2020 apply to this document:
3:1
ocean current
Macro flow of sea water:
Note: Ocean currents are characterized by velocity and direction:
[Source: GB/T 15920-2010, 2:3:1]
3:2
flow to currentdirection
The direction the sea is going:
Note: The unit of flow direction is degree (°), true north is zero, and measured clockwise:
[Source: GB/T 15920-2010, 2:3:2]
3:3
flow ratecurrentspeed
The distance traveled by seawater in unit time:
[Source: GB/T 15920-2010, 2:3:3, modified]
3:4
ocean current forecast
A marine forecast issued for a specific area and timeliness, including information on the flow of seawater, its direction, and velocity:
[Source: GB/T 39628-2020, 4:1:4]
3:5
surface current surface current
The upper boundary is the average current with a certain thickness on the free sea surface:
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