GB/T 12763.3-2020Specifications for oceanographic survey - Part 3:Marine meteorological observations (English PDF)

1 Scope

This part of GB/T 12763 specifies the marine meteorological observation items, technical indicators, observation methods, records, and submission of results:

Claim:

This section applies to marine meteorological observations in the investigation of basic elements of the marine environment:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article

Pieces: For undated references, the latest version (including all amendments) applies to this document:

GB/T 4844 pure helium, high-purity helium and ultra-pure helium

GB/T 12763:1 Marine Survey Specification Part 1: General

GB/T 12763:7 Ocean Survey Specification Part 7: Ocean Survey Data Exchange

3 Terms and definitions

The following terms and definitions apply to this document:

3:1

Seasurfaceeffectivehorizontalvisibility

The maximum horizontal distance within the field of view of more than half of the sea level that the station can see:

Note: Rewrite GB/T 17838-2017, definition 2:4:

3:2

Minimum visibility at sea surface seasurfaceminimumhorizontalvisibility

The minimum horizontal distance that can be seen when the visibility of the sea surface in all directions around the station is inconsistent:

3:3

Relative humidity relativehumidity

The ratio of the actual water vapor pressure in the air to the saturated water vapor pressure at the current temperature:

[GB/T 17838-2017, definition 2:19]

3:4

Cloudcover

The number of clouds obstructing the view of the sky:

Note: Total cloud amount refers to the total number of sky covered by all clouds; low cloud amount refers to the number of sky covered by low clouds:

3:5

Cloudform […]