Environmental Data Coding Specifcation        ISO IEC LogosRight Title Graphic
Home Browse Search Download Submissions FAQs Contact
 

EA:  PASQUILL_ATMOSPHERE_STABILITY_INDEX

Status: STD 2005/06/07
Code: 945
Concept definition: A method of categorizing the stability of an <ATMOSPHERE_REGION> of the <EARTH> in terms of the horizontal surface <<WIND_SPEED>>, the amount of solar radiation (insolation), and the <<TOTAL_CLOUD_COVERAGE>>; Pasquill atmosphere stability index.
 
Attribute value type: ENUMERATION
Reference type: IR
Reference: [GMET, "Pasquill stability classes"]
Supplemental references:  
Enumerants (presented in a natural order)
Status Attribute label Enumerant label ▾ Concept definition Code Ref type Reference Supplemental references
STD
2005/06/07		 PASQUILL_ATMOSPHERE-
_STABILITY_INDEX		 CATEGORY_C_D Intermediate between neutral and slightly unstable: daytime only, <<WIND_SPEED>> 4 to 6 metres per second with moderate insolation; Category C-D. 6 IR [APMD, Section 4.8.5]  
STD
2005/06/07		 PASQUILL_ATMOSPHERE-
_STABILITY_INDEX		 CATEGORY_D Neutral conditions: during daytime, <<WIND_SPEED>> 4 to 6 metres per second with slight insolation, or <<WIND_SPEED>> greater than 6 metres per second with moderate or slight insolation; during <<WIND_SPEED>>, wind speed greater than 3 metres per second with thin overcast or more than 1/2 low cloud coverage, or <<WIND_SPEED>> greater than 4 metres per second with less than 3/8 cloud cover; anytime with heavy overcast; Category D. 7 IR [APMD, Section 4.8.5]  
STD
2005/06/07		 PASQUILL_ATMOSPHERE-
_STABILITY_INDEX		 CATEGORY_E Slightly stable: night-time only, <<WIND_SPEED>> 2 to 3 metres per second and thin overcast or more than 1/2 low cloud coverage, or <<WIND_SPEED>> 3 to 4 metres per second and less than 3/8 cloud cover; Category E. 8 IR [APMD, Section 4.8.5]  
STD
2005/06/07		 PASQUILL_ATMOSPHERE-
_STABILITY_INDEX		 CATEGORY_F Moderately stable, night-time only, <<WIND_SPEED>> 2 to 3 metres per second and less than 3/8 cloud cover; Category F. 9 IR [APMD, Section 4.8.5]  
STD
2005/06/07		 PASQUILL_ATMOSPHERE-
_STABILITY_INDEX		 CATEGORY_G Extremely stable; Category G. 10 IR [APMD, Section 4.8.5]  
Group membership:

In addition to the status and date information for each entry, a colour coding scheme highlights the database holding to which an entry belongs. The following highlight colours are used:

  • white - the entry is in the standard
  • yellow - the entry has been added to the register
  • pink - the entry has been submitted for inclusion in the register, but it is not approved
  • cyan - a deprecated entry that was originally either in the standard or was added to the register, but has since been deprecated

The following icons are used to identify items that have figures, modifications and/or clarification notes:

  • F n - has Figures and, if more than one figure, n figures
  • M - has Modifications
  • C - has Clarifications

Bottom Bar Graphic
 Send mail to webmaster with questions or comments about this web site.