Skip to main content

Home/ science assignment/ Group items tagged tropics

Rss Feed Group items tagged

Filter: All | Bookmarks | Topics Simple Middle
James Linzel

Climate Feedback: Tropics expanding fast - 0 views

blogs.nature.com/...tropics_expanding_fast_1.html

climate climatechange tropics

shared by James Linzel on 05 Dec 07 - Cached
  • boundaries of the tropics, defined by temperature, rainfall, wind, and ozone patterns, have shifted poleward by at least 2 degrees latitude in the last 25 years.
    • James Linzel
      James Linzel on 05 Dec 07
       
      Obviously you need to understand the term 'latitude' and 'poleward'.
  • It could be warming of the ocean surface, ozone depletion, El Nino changes, or climate change in the stratosphere (NOAA), among other ideas. In fact, the review's lead author "said this expansion may only be temporary, but there's no way of knowing yet"
  • As with ice melt, the long-term worst-case scenario includes an irreversible climate tipping point from altered ocean circulation.
  • ...3 more annotations...
  • their poleward shift could lead to fundamental shifts in ecosystems and in human settlements.
  • Of particular concern are the semi-arid regions poleward of the subtropical dry belts, including the Mediterranean, the southwestern United States and northern Mexico, southern Australia, southern Africa, and parts of South America. A poleward expansion of the tropics is likely to bring even drier conditions to these heavily populated regions, but may bring increased moisture to other areas.
  • An increase in the width of the tropics could bring an increase in the area affected by tropical storms, or could change climatological tropical cyclone development regions and tracks.
sulaiman

Latitude - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Latitude

shared by sulaiman on 23 Nov 07 - Cached
  • Latitude, usually denoted symbolically by the Greek letter phi, , gives the location of a place on Earth north or south of the equator.
  • Lines of Latitude are the horizontal lines shown running east-to-west on maps.
  • Besides the equator, four other lines of latitude are named because of the role they play in the geometrical relationship with the Earth and the Sun: Arctic Circle — 66° 33′ 39″ N Tropic of Cancer — 23° 26′ 21″ N Tropic of Capricorn — 23° 26′ 21″ S Antarctic Circle — 66° 33′ 39″ S
1 - 2 of 2
Showing 20▼ items per page