Cross the Pacific ITCZ

From CruisersWiki

(Difference between revisions)
Jump to: navigation, search
m (Text replace - "[[Passage_12" to "[[Trans Pacific ("Puddle-Jump")")
m (Text replace - "==Communication== * * ''Also see World Cruiser's Nets''. " to "==Communication== * ''Also see World Cruiser's Nets''. ")
 
(13 intermediate revisions not shown)
Line 1: Line 1:
-
==Crossing the Pacific ITCZ==
+
{{IsPartOf|Pacific Ocean|East Pacific}}
-
[[Image:ITCZ.png|frame|center|Position of the ITCZ in July (red) and in January (blue)]]
+
{{TOC block}}
-
===Background===
+
 
 +
{{Infobox passage
 +
| name = Crossing the Pacific ITCZ
 +
| mapwidth = 455px
 +
| mapzoom=  
 +
| map = ITCZ.png
 +
| label = Position of the ITCZ
 +
| notes ={{Red|July}}<br />{{Blue| January}}
 +
}}
 +
 
 +
==Description==
The '''Intertropical Convergence Zone''' '''(ITCZ)''', also known as the '''Intertropical Front''', '''Monsoon trough''', '''Doldrums''' or the '''Equatorial Convergence Zone''', is a belt of low pressure girdling Earth at the equator. It is formed by the vertical ascent of warm, moist air from the latitudes above and below the equator.
The '''Intertropical Convergence Zone''' '''(ITCZ)''', also known as the '''Intertropical Front''', '''Monsoon trough''', '''Doldrums''' or the '''Equatorial Convergence Zone''', is a belt of low pressure girdling Earth at the equator. It is formed by the vertical ascent of warm, moist air from the latitudes above and below the equator.
Line 17: Line 27:
Within the '''ITCZ''' the average winds are slight, unlike the zones north and south of the equator where the trade winds feed. Early sailors named this belt of calm the ''doldrums'' because of the inactivity and stagnation they found themselves in after days of no wind. To find oneself becalmed in this region in a hot and muggy climate could mean death in an era when wind was the only effective way to propel ships across the ocean.
Within the '''ITCZ''' the average winds are slight, unlike the zones north and south of the equator where the trade winds feed. Early sailors named this belt of calm the ''doldrums'' because of the inactivity and stagnation they found themselves in after days of no wind. To find oneself becalmed in this region in a hot and muggy climate could mean death in an era when wind was the only effective way to propel ships across the ocean.
-
===Passage Across/Through the Pacific ITCZ===
+
==Charts==
-
Describe this passage and expected weather conditions?
+
{{GreenText|Give charts applicable to this port or refer to a Chart section of another page (Country or Region) that lists the charts.}}
 +
; {{Magenta|Source}}
 +
: {{Magenta|Chart Number - Chart Name}}
 +
: {{Magenta|Chart Number - Chart Name}}
 +
; {{Magenta|Source}}
 +
: {{Magenta|Chart Number - Chart Name}}
 +
:
-
===Publications===
+
==Weather==
-
* [http://www.sailsarana.com/gbook/crossing_itcz.pdf Crossing the Pacific ITCZ] - A free .pdf download
+
{{Green|Give expected climatic & weather conditions for this passage or refer to another page (a region or island group) that covers these conditions.}}
 +
 
 +
Sources for Weather forecasts:
*  
*  
 +
*
 +
 +
====Weather Windows====
 +
{{GreenText|Give the best time/s of year for this passage and expected weather conditions.}}
 +
 +
==Navigation==
 +
{{Green|Add any navigation notes such approaches, dangers etc here. If this section does not apply remove it.}}
 +
 +
==Communication==
*
*
-
===Links to the Cruiserlog Forum Discussions===
+
''Also see [[World MM Nets|World Cruiser's Nets]]''.
-
Links to discussion threads on the Cruiserlog forum:
+
==Possible Departure Points==
 +
{{GreenText|List the possible departure ports. Include their coordinates. It is assumed that corresponding Wiki pages of these ports either exist or will be created.}}
 +
 
 +
* {{mark |DD|N.m|N/S|DD|M.m|E/W| type= marina |name= {{magenta|Departure Point1}} | zoom= 14}}
 +
* {{mark | lat = D.d | lon= D.d | type= harbour |name= {{magenta|Departure Point2}} |altname = {{magenta|Alternate name Departure Point2}}  | zoom= 14}}
 +
* {{mark | lat = D.d | lon= D.d | type= anchorage |name= {{magenta|Departure Point2}} |altname = {{magenta|Alternate name Departure Point2}}  | zoom= 14}}
 +
* {{Green|etc.}}
 +
 
 +
==Route/Suggested Stopovers==
 +
{{Green|List the route and the suggested stopover points (in sequence), including their coordinates, and some description.}}
 +
 
 +
# Starting from {{mark |DD|N.m|N/S|DD|M.m|E/W| type= harbour |name= {{magenta|Departure Point1}} | zoom= 14}}
 +
## xx nM SE  to {{mark |DD|N.m|N/S|DD|M.m|E/W| type= anchorage | name= {{magenta|Anchorage Point1}}  |altname = {{magenta|Alt name of Anchorage Point1}} | zoom= 15}} in the SW side of the island of [[{{Magenta|yy}}]],
 +
## or 21 nM S to the remote island of {{mark |DD|N.m|N/S|DD|M.m|E/W| type= island |name= {{magenta|Island Point1}} | zoom= 14}}, form here you can go
 +
# xx nM to {{mark |DD|N.m|N/S|DD|M.m|E/W| type= harbour | name= {{magenta|Stopover Point1}} | zoom= 15}}
 +
# {{Green|etc.}}
 +
# Finally you arrive at  {{mark |DD|N.m|N/S|DD|M.m|E/W| type= harbour |name= {{magenta|Arrival Port1}} | zoom= 14}}
 +
 
 +
==Possible Arrival Points==
 +
{{Green|List the possible arrival ports (in sequence). Include their coordinates.}}
 +
* {{mark |DD|N.m|N/S|DD|M.m|E/W| type= harbour |name= {{magenta|Arrival Port1}} | zoom= 14}}
 +
* {{mark |DD|N.m|N/S|DD|M.m|E/W| type= harbour |name= {{magenta|Arrival Ports}} | zoom= 14}}
 +
* {{Green|etc.}}
 +
 
 +
==Distance & Duration==
 +
{{Green|Give a distance table if possible.}}
 +
 
 +
<div align="center"><small>
 +
{| class="wikitable" style="margin: 1em auto 1em auto"" 
 +
|+ '''Approximate Distances in nM (±5 )<br/>Approximate Duration days + hours (non-stop, assumes an average speed of 6 knots)'''
 +
|- align=center
 +
|bgcolor="#ABCDEF"| ||bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Departure Point1</span>]]''' ||bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Stopover Point1</span>]]''' ||bgcolor="#ABCDEF"|  '''[[<span style="color:magenta">Stopover Point2</span>]]''' ||bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Stopover Point3</span>]]'''  ||bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Arrival Point 1</span>]]''' ||bgcolor="#ABCDEF"|  '''[[<span style="color:magenta">Arrival Point2</span>]]'''
 +
|- align=center
 +
|align=left bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Departure Point1</span>]]''' || || <span style="color:magenta">x1<br />d+h</span> || <span style="color:magenta">x2<br />d+h</span> || <span style="color:magenta">x3<br />d+h</span> || <span style="color:magenta">x4<br />d+h</span> || <span style="color:magenta">x5<br />d+h</span>
 +
|- align=center
 +
|align=left bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Stopover Point1</span>]]''' || <span style="color:magenta">x1<br />d+h</span> || || <span style="color:magenta">x6<br />d+h</span> || <span style="color:magenta">x7<br />d+h</span> || <span style="color:magenta">x8<br />d+h</span> || <span style="color:magenta">x9<br />d+h</span>
 +
|- align=center
 +
|align=left bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Stopover Point2</span>]]''' || <span style="color:magenta">x2<br />d+h</span> || <span style="color:magenta">x6<br />d+h</span> || || <span style="color:magenta">x10<br />d+h</span> || <span style="color:magenta">x11<br />d+h</span>|| <span style="color:magenta">x12<br />d+h</span>
 +
|- align=center
 +
|align=left bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Stopover Point3</span>]]''' || <span style="color:magenta">x3<br />d+h</span> || <span style="color:magenta">x7<br />d+h</span> || <span style="color:magenta">x10<br />d+h</span> || || <span style="color:magenta">x13<br />d+h</span> || <span style="color:magenta">x14<br />d+h</span>
 +
|- align=center
 +
|align=left bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Arrival Point 1</span>]]''' || <span style="color:magenta">x4<br />d+h</span> || <span style="color:magenta">x8<br />d+h</span> || <span style="color:magenta">x11<br />d+h</span> || <span style="color:magenta">x13<br />d+h</span> || || <span style="color:magenta">x15<br />d+h</span>
 +
|- align=center
 +
|align=left bgcolor="#ABCDEF"| '''[[<span style="color:magenta">Arrival Point2</span>]]''' || <span style="color:magenta">x5<br />d+h</span> || <span style="color:magenta">x9<br />d+h</span> || <span style="color:magenta">x12<br />d+h</span> || <span style="color:magenta">x14<br />d+h</span> || <span style="color:magenta">x15<br />d+h</span> ||
 +
 
 +
|}</small></div>
 +
 
 +
==Forums==
 +
List links to discussion threads on [[Cruising Forums|partnering forums]]. (''see link for requirements'')
*  
*  
*  
*  
-
===External Links===
+
==Links==
 +
{{GreenText|List links external to the wiki such as in [http://en.wikipedia.org/wiki/Wikipaedia Wikipedia].}}
*  
*  
 +
*
 +
 +
==References==
 +
* [http://www.sailsarana.com/gbook/crossing_itcz.pdf Crossing the Pacific ITCZ] - A free .pdf download
*  
*  
 +
*
-
===Personal Notes===
+
{{Comments}}
-
Personal experiences?
+
*  
*  
 +
{{Verified by}}
 +
*
 +
*
-
{{Guide1}}
+
{{Page outline}}
-
 
+
-
<center>[[Trans Pacific ("Puddle-Jump")|BACK]]</center>
+
{{Contributors|[[User:Lighthouse|Lighthouse]]}}
-
[[Category:Unknown]]
+
[[Category:Passages]]

Latest revision as of 10:05, 22 August 2018

World ▶ Pacific Ocean ▶ East Pacific ▶ Cross the Pacific ITCZ

Contents


Crossing the Pacific ITCZ
ITCZ.png
Magnify-clip.png
Position of the ITCZ
July
January

Description

The Intertropical Convergence Zone (ITCZ), also known as the Intertropical Front, Monsoon trough, Doldrums or the Equatorial Convergence Zone, is a belt of low pressure girdling Earth at the equator. It is formed by the vertical ascent of warm, moist air from the latitudes above and below the equator.

The air is drawn into the intertropical convergence zone by the action of the Hadley cell, a macroscale atmospheric feature which is part of the Earth's heat and moisture distribution system. It is transported aloft by the convective activity of thunderstorms; regions in the intertropical convergence zone receive precipitation over 200 days in a year.

The location of the intertropical convergence zone varies over time. Over the oceans, where the convergence zone is better defined, the seasonal cycle is more subtle, as the convection is constrained by the distribution of ocean temperatures.

Sometimes, a double ITCZ forms, with one located north and another south of the equator. When this occurs, a narrow ridge of high pressure forms between the two convergence zones, one of which is usually stronger than the other.

Variation in the location of the intertropical convergence zone drastically affects rainfall in many equatorial nations, resulting in the wet and dry seasons of the tropics rather than the cold and warm seasons of higher latitudes. Longer term changes in the intertropical convergence zone can result in severe droughts or flooding in nearby areas.

In some cases, the ITCZ may become narrow, especially when it moves away from the equator; the ITCZ can then be interpreted as a front along the leading edge of the equatorial air.

Within the ITCZ the average winds are slight, unlike the zones north and south of the equator where the trade winds feed. Early sailors named this belt of calm the doldrums because of the inactivity and stagnation they found themselves in after days of no wind. To find oneself becalmed in this region in a hot and muggy climate could mean death in an era when wind was the only effective way to propel ships across the ocean.

Charts

Give charts applicable to this port or refer to a Chart section of another page (Country or Region) that lists the charts.

Source
Chart Number - Chart Name
Chart Number - Chart Name
Source
Chart Number - Chart Name

Weather

Give expected climatic & weather conditions for this passage or refer to another page (a region or island group) that covers these conditions.

Sources for Weather forecasts:

Weather Windows

Give the best time/s of year for this passage and expected weather conditions.

Navigation

Add any navigation notes such approaches, dangers etc here. If this section does not apply remove it.

Communication

Also see World Cruiser's Nets.

Possible Departure Points

List the possible departure ports. Include their coordinates. It is assumed that corresponding Wiki pages of these ports either exist or will be created.

  • Departure Point1/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EDeparture_Point1.3C.2Fspan.3EMarina icon Departure Point1 [[Cross the Pacific ITCZ#Departure Point1|Departure Point1]] DD°N.m′N/S, DD°M.m′E/W
  • Departure Point2/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EDeparture_Point2.3C.2Fspan.3EHarbour icon Departure Point2 [[Cross the Pacific ITCZ#Departure Point2|Departure Point2]] (Alternate name Departure Point2) °'N, °'E
  • Departure Point2/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EDeparture_Point2.3C.2Fspan.3EAnchorage icon Departure Point2 [[Cross the Pacific ITCZ#Departure Point2|Departure Point2]] (Alternate name Departure Point2) °'N, °'E
  • etc.

Route/Suggested Stopovers

List the route and the suggested stopover points (in sequence), including their coordinates, and some description.

  1. Starting from Departure Point1/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EDeparture_Point1.3C.2Fspan.3EHarbour icon Departure Point1 [[Cross the Pacific ITCZ#Departure Point1|Departure Point1]] DD°N.m′N/S, DD°M.m′E/W
    1. xx nM SE to Anchorage Point1/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EAnchorage_Point1.3C.2Fspan.3EAnchorage icon Anchorage Point1 [[Cross the Pacific ITCZ#Anchorage Point1|Anchorage Point1]] (Alt name of Anchorage Point1) DD°N.m′N/S, DD°M.m′E/W in the SW side of the island of [[yy]],
    2. or 21 nM S to the remote island of Island Point1/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EIsland_Point1.3C.2Fspan.3EIsland icon Island Point1 [[Cross the Pacific ITCZ#Island Point1|Island Point1]] DD°N.m′N/S, DD°M.m′E/W , form here you can go
  2. xx nM to Stopover Point1/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EStopover_Point1.3C.2Fspan.3EHarbour icon Stopover Point1 [[Cross the Pacific ITCZ#Stopover Point1|Stopover Point1]] DD°N.m′N/S, DD°M.m′E/W
  3. etc.
  4. Finally you arrive at Arrival Port1/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EArrival_Port1.3C.2Fspan.3EHarbour icon Arrival Port1 [[Cross the Pacific ITCZ#Arrival Port1|Arrival Port1]] DD°N.m′N/S, DD°M.m′E/W

Possible Arrival Points

List the possible arrival ports (in sequence). Include their coordinates.

  • Arrival Port1/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EArrival_Port1.3C.2Fspan.3EHarbour icon Arrival Port1 [[Cross the Pacific ITCZ#Arrival Port1|Arrival Port1]] DD°N.m′N/S, DD°M.m′E/W
  • Arrival Ports/wiki/Cross_the_Pacific_ITCZ#.3Cspan_style.3D.22color:magenta_.22.3EArrival_Ports.3C.2Fspan.3EHarbour icon Arrival Ports [[Cross the Pacific ITCZ#Arrival Ports|Arrival Ports]] DD°N.m′N/S, DD°M.m′E/W
  • etc.

Distance & Duration

Give a distance table if possible.

Approximate Distances in nM (±5 )
Approximate Duration days + hours (non-stop, assumes an average speed of 6 knots)
[[Departure Point1]] [[Stopover Point1]] [[Stopover Point2]] [[Stopover Point3]] [[Arrival Point 1]] [[Arrival Point2]]
[[Departure Point1]] x1
d+h 		x2
d+h 		x3
d+h 		x4
d+h 		x5
d+h
[[Stopover Point1]] x1
d+h 		x6
d+h 		x7
d+h 		x8
d+h 		x9
d+h
[[Stopover Point2]] x2
d+h 		x6
d+h 		x10
d+h 		x11
d+h		 x12
d+h
[[Stopover Point3]] x3
d+h 		x7
d+h 		x10
d+h 		x13
d+h 		x14
d+h
[[Arrival Point 1]] x4
d+h 		x8
d+h 		x11
d+h 		x13
d+h 		x15
d+h
[[Arrival Point2]] x5
d+h 		x9
d+h 		x12
d+h 		x14
d+h 		x15
d+h

Forums

List links to discussion threads on partnering forums. (see link for requirements)

Links

List links external to the wiki such as in Wikipedia.

References

Comments

We welcome users' contributions to the Wiki. Please click on Comments to view other users' comments, add your own personal experiences or recommend any changes to this page following your visit.

Verified by

Date of member's last visit to Cross the Pacific ITCZ and this page's details validated:


This page has an outline in place but needs completing. Please contribute if you can to help it grow further. Click on Comments to suggest further content or alternatively, if you feel confident to edit this page, click on the edit tab at the top and enter your changes directly.


SailorSmiley.gifContributors to this page

Names: Lighthouse


Retrieved from "https://www.cruiserswiki.org/wiki/Cross_the_Pacific_ITCZ"
Personal tools
advertisement
Friends of Cruisers Wiki