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GB/T 21983-2020: Warm winter grades
Status: Valid GB/T 21983: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21983-2020 | English | 189 |
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Warm winter grades
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GB/T 21983-2020
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| GB/T 21983-2008 | English | 319 |
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Warm winter grade
| Obsolete |
GB/T 21983-2008
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PDF similar to GB/T 21983-2020
Basic data | Standard ID | GB/T 21983-2020 (GB/T21983-2020) | | Description (Translated English) | Warm winter grades | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A47 | | Classification of International Standard | 07.060 | | Word Count Estimation | 10,114 | | Date of Issue | 2020-07-21 | | Date of Implementation | 2020-07-21 | | Older Standard (superseded by this standard) | GB/T 21983-2008 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 21983-2020: Warm winter grades---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Warm winter grades
ICS 07.060
A47
National Standards of People's Republic of China
Replace GB/T 21983-2008
Warm winter grade
2020-07-21 released
2020-07-21 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅰ
1 Scope 1
2 Terms and definitions 1
3 Warm winter classification, judgment and classification 2
Appendix A (normative appendix) Method for selecting warm winter threshold 3
Appendix B (Normative Appendix) National Warm Winter Index Calculation Method 5
Reference 7
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 21983-2008 "Warm Winter Grade". Compared with GB/T 21983-2008, the main technical
The technical changes are as follows.
--- Revised the "Scope" chapter (see Chapter 1, Chapter 1 of the.2008 edition);
---Modified the definitions of "warm winter", "single station warm winter threshold", "winter average temperature" and "climate average" (see Chapter 2,.2008 edition
2.1~2.4);
---Added the terms and definitions of "single station", "area", "warm winter index", "effective site" and "effective grid" (see 2.5, 2.6, 2.8~2.10);
--- Added "Warm Winter Classification" (see 3.1);
---Modified the definition method of regional strong warm winter and national strong warm winter (see 3.2.2.2, 3.3.2.2, 3.2.2 and 3.3.2 of the.2008 edition);
---Added requirements for regional warm winter assessment sites (see 3.2.2.3);
--- Added a description of the coverage of the national warm winter index calculation (see 3.2.3.3);
---Added the regulations for selecting the age of the climatic average of the target year (see Appendix A, A.1);
---Added anomaly calculation formula (see Appendix A, A.4);
---Modified the calculation formulas for the grid spacing and effective grid area of latitude and longitude grid division (see Appendix B, B.1,.2008 edition, 3.3.
1.1, 3.3.1.2);
---The calculation method of the National Strong Warm Winter Index has been added (see Appendix B, B.6 and B.7).
This standard was proposed by the China Meteorological Administration.
This standard is under the jurisdiction of the National Climate and Climate Change Standardization Technical Committee (SAC/TC540).
Drafting organization of this standard. National Climate Center.
The main drafters of this standard. Chen Yu, Xiang Yang, Zou Xukai, Wang Ling.
The previous versions of the standard replaced by this standard are as follows.
---GB/T 21983-2008.
Warm winter grade
1 Scope
This standard specifies the determination method and classification of single station, regional and national warm winter.
This standard is applicable to the monitoring, forecasting, evaluation and service of warm winter.
2 Terms and definitions
The following terms and definitions apply to this document.
2.1
Average temperature in winter
The average temperature from December of the previous year to February of the current year (target year).
Note. The unit is degrees Celsius (°C).
[GB/T 33675-2017, definition 2.1]
2.2
Climatological normal
Climate
Annual value
The average values of meteorological elements for the most recent 3 consecutive whole years.
Note. In accordance with the relevant regulations of the World Meteorological Organization (WMO), it is updated every year, that is, during the period from.2011 to 2020, the 1981-2010
The average value is taken as its climatic average value, and so on.
2.3
Winter average temperature anomaly winterean surface air temperature anomaly
The difference between the average winter temperature and its climatic average.
Note. The unit is degrees Celsius (°C).
2.4
Warmwinter
A climatic phenomenon in which the average temperature in winter is higher than the climatic average to a certain extent.
2.5
Single station weatherstation
A certain meteorological observation station, also called station or station.
[GB/T 33675-2017, definition 2.4]
2.6
Region
A given geographic area.
Note 1.Such as administrative regions, climate regions, watershed regions, etc., excluding the entire country.
Note 2.Rewrite GB/T 33675-2017, definition 2.5.
2.7
Single station warm winter threshold thresholdofwarmwinterforweatherstation
The critical value to determine the warm winter of a single station and its degree.
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