If you wish to contribute or participate in the discussions about articles you are invited to join SKYbrary as a registered user

 Actions

Difference between revisions of "Western Pacific Warm Pool"

From SKYbrary Wiki

m (Integration.Manager moved page Western Pacific Warm Pool to Work in progress:Western Pacific Warm Pool without leaving a redirect)
m (Integration.Manager moved page Work in progress:Western Pacific Warm Pool to Western Pacific Warm Pool without leaving a redirect)
 
(4 intermediate revisions by 2 users not shown)
Line 12: Line 12:
  
 
==Definition==
 
==Definition==
The Pacific Warm Pool (PWP) is defined in some publications as the area in the Western Tropical Pacific enclosed by the 28.5 deg C isotherm.  
+
The Pacific Warm Pool (PWP) is characterised by a mean sea surface temperature (SST) exceeding 28 deg C (the minimum surface water temperature that supports deep convection), weak trade winds, and the resultant deep convection, with thunderstorm tops exceeding 15 km.  
  
This body of water, which spans the western waters of the equatorial Pacific, holds the warmest seawaters in the world. Because this area of warm water pushes west into the Indian Ocean, it is also often refereed to as the Indo-Pacific Warm Pool.  
+
This body of water, which spans the western waters of the equatorial Pacific, holds the warmest seawaters in the world. Because this area of warm water pushes west into the Indian Ocean, it is also often refered to as the Indo-Pacific Warm Pool.  
  
Scientists found that, over a period of roughly two decades, the warm pool’s average annual temperatures and dimensions increase and then decrease like a slowly pulsating beacon.  
+
Scientists found that, over a period of roughly two decades, the warm pool’s average annual temperatures and dimensions (the area enclosed within the 28 deg C isotherm) increase and then decrease like a slowly pulsating beacon.  
  
 
[[File:SPCZ.png|Thumb|none|500px|South Pacific Convergence Zone]]
 
[[File:SPCZ.png|Thumb|none|500px|South Pacific Convergence Zone]]
  
 +
==Discussion==
 +
Because these waters are hot enough to drive heat and moisture high into the atmosphere (by convection), the warm pool has a large effect on the climate of surrounding lands. It has been called the “heat engine of the world” and plays a key role in climate and monsoon variability for many nations throughout Asia and Africa and also influences remote regions and large scale climate models of variability. Furthermore, the size and intensity of the warm pool fluctuates with the El Niño–Southern Oscillation (ENSO). During [[El Nino]] events, the PWP expands horizontally but shrinks in vertical depth. The opposite occurs during [[La Nina]].
  
==Discussion==
+
Overall in recent years, the PWP has increased in both horizontal coverage and vertical depth. This is believed due to global warming.
Because these waters are hot enough to drive heat and moisture high into the atmosphere, the warm pool has a large effect on the climate of surrounding lands. Furthermore, the slow fluctuations of size and intensity of the warm pool may be linked with the intensity of El Niño.
 
  
 
==Related Articles==
 
==Related Articles==

Latest revision as of 13:00, 3 September 2019

Article Information
Category: Weather Weather
Content source: SKYbrary About SKYbrary
Content control: SKYbrary About SKYbrary
WX
Tag(s) Climatic Phenomena

Definition

The Pacific Warm Pool (PWP) is characterised by a mean sea surface temperature (SST) exceeding 28 deg C (the minimum surface water temperature that supports deep convection), weak trade winds, and the resultant deep convection, with thunderstorm tops exceeding 15 km.

This body of water, which spans the western waters of the equatorial Pacific, holds the warmest seawaters in the world. Because this area of warm water pushes west into the Indian Ocean, it is also often refered to as the Indo-Pacific Warm Pool.

Scientists found that, over a period of roughly two decades, the warm pool’s average annual temperatures and dimensions (the area enclosed within the 28 deg C isotherm) increase and then decrease like a slowly pulsating beacon.

South Pacific Convergence Zone

Discussion

Because these waters are hot enough to drive heat and moisture high into the atmosphere (by convection), the warm pool has a large effect on the climate of surrounding lands. It has been called the “heat engine of the world” and plays a key role in climate and monsoon variability for many nations throughout Asia and Africa and also influences remote regions and large scale climate models of variability. Furthermore, the size and intensity of the warm pool fluctuates with the El Niño–Southern Oscillation (ENSO). During El Nino events, the PWP expands horizontally but shrinks in vertical depth. The opposite occurs during La Nina.

Overall in recent years, the PWP has increased in both horizontal coverage and vertical depth. This is believed due to global warming.

Related Articles

Further Reading