GB/T 42254-2022Sea ice grade of Bohai Sea and Northern Yellow Sea (English PDF)
渤海和黄海北部冰情等级
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 30, 2022
Implementation date
April 1, 2023
Scope
GB/T 42254-2022 is the English-translated version of 渤海和黄海北部冰情等级.
GB/T 42254-2022 grades the sea ice regime of the Bohai Sea and the northern Yellow Sea. Clause 1 states that it specifies those levels and applies to sea ice observation, forecasting and warning, to sea ice disaster investigation and risk assessment and to the production of analysis products, other Chinese sea areas using it as a reference.
The quantities it rests on come in clause 3, from the ocean observation, oceanographic terminology and sea ice warning standards it quotes: sea ice, extended by a note to river, lake and glacier ice carried from land; floating ice; the sea ice edge between the floating ice area and open water; and the floating ice extent, measured along the bay centre line to the ice edge. Issued on 30 December 2022, it has applied since 1 April 2023.
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Document preview — GB/T 42254-2022
National Standard of the People's Republic of China
- ICS
- 07.060
- Classification
- A 45
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
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.
1 Scope
This document specifies the ice regime levels for the Bohai Sea and the northern Yellow Sea.
This document is applicable to sea ice observation, forecast, warning and sea ice disaster investigation, risk assessment and production of analysis products, etc. my country's other It can be used as a reference for other works such as determination of ice conditions in other sea areas.
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 14914.2 Specifications for Ocean Observation Part 2: Coastal Observation
GB/T 15920 Oceanographic Terminology Physical Oceanography
GB/T 19721.3 Marine Forecast and Warning Issue Part 3: Sea Ice Forecast and Warning Issue
3 Terms and Definitions
The following terms and definitions defined in GB/T 14914.2, GB/T 15920 and GB/T 19721.3 apply to this document.
3.1 Sea ice
A general term for all ice that occurs at sea.
Note: In addition to the ice directly frozen by seawater, it also includes river ice, lake ice and glacier ice from land. [Source: GB/T 19721.3-2017, 3.1, modified]
3.2 Floating ice
Ice floating on the sea. [Source: GB/T 19721.3-2017, 3.2]
3.3 Sea ice edge
The boundary line between the floating ice area and sea water. [Source: GB/T 19721.3-2017, 3.3]
3.4 Floatingiceextent
The distance from the bottom of the bay along the center line of the bay to the outer edge of sea ice. [Source: GB/T 19721.3-2017, 3.4]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 14914.2-2019 — The specification for marine observation - Part 2 :Offshore observation
GB/T 15920-2010 — Oceanographic terminology - Physical oceanography
GB/T 19721.3-2017 — The issue of marine forecasts and warnings—Part 3: The issue of sea ice forecasts and warnings
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GB/T 42254-2022
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