Land Management
- Created by: nicola
- Created on: 25-04-11 17:03
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Greenland et al (1998) - Issues of land accessibility = hard to get to or land owned by someone else and not able to afford to buy it
Changing historic climate changes the rate of geomorphic processes
- Generally an increase in temps seen but not uniform - especially seen across the Caribbean and other tropical areas (Gamble, 2009)
- Change in rainfall - again no uniform pattern, some areas getting wetter some drier
- In Caribbean, this is mainly a drying trend however areas which do have increases such as Bahamas, do so in large amounts (increase of 554mm/100yrs ) (Gamble, 2009)
- Change in CO2 levels (from deforestation?)
- Harder to predict local weather and outcomes in a certain area = issue of scale - trends seen at a global/ regional scale but not locally
- Deforestation is enhancing dessication -
- 40--50% rainfall in tropics is convectional
- Removal of natural forest with replacement of agricultural crops, reduces convection and thus rainfall causing bare soils from less plant cover
- This increases surface temps and evaporation resulting in dessication
- Bare ground also leads to soil compaction enhancing runoff therefore more topsoil is lost
Since 2000 there has been an increase in variability of temps and rainfall - harder for vegetation to survive
Hurricanes fairly low in 1960s:
- In 2000's see a rapid increase
- 2005 = largest number of hurricanes in 1 yr since 1937 (6 in total)
- 2008 and 2010 = 5 in 1 yr - largest number since 80s
- Shows increased variability and frequency in conjunction with rising SSTs and increasing air temps (McGregor, 1995)
- Has affected crops in many countries e.g. Jamaica after Hurricane Gilbert in 1980s (Campbell et al, 2011)
Developing of la nina = high number of hurricanes due to the hotter SST = la Nina oscillations are occurring more frequently
Climate change is making farmers more vulnerable and increasing risk - particularly in arid/ semi-arid areas
Rielly (1996) - Defines vulnerability as:
- To farmers:
- Yield losses reduce income which in turn causes poverty and limits adaptation potential
- Limited technological availability
- In regional economy:
- limited economy
- heavy reliance on farm sector (biggest single employer)
- Limited…
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