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earths life support system 6 (continued) (what can be monitored to detect…
earths life support system 6 (continued)
sea surface temperatures (SSTs)
can be measured at around ground level using buoys with thermometers attached. the pacific ocean has a series of these which can help explain weather and ocean phenomenon
however, it is thought that these are not totally accurate and inconsistencies between ways of measuring the temperature across the ocean have meant that satellite remote sensing is used
what can be monitored to detect changes in the water and carbon cycle
mass of ice caps and glaciers
mass of article sea ice
primary production in the oceans
water vapour
atmospheric carbon dioxide
deforestation
sea surface temperatures
ground-based measurements
ground-based measurements of changes tends to be impractical at a global scales, so monitoring relies on satellite technology (remote sensing)
this data is continuously monitored on a day to day, month by month or year to year basis and allows changes to be observed on various time scales
this data can then by mapped and analysed on a computer map known as a GIS
case study on the Amazon Basin
how many hectares were forested in 2000?
- the watershed experienced 23MHa of tree cover loss
how many hectares are estimated to have been covered the forest if there was no human influence?
- 563MHa
how many dams are there?
- 513 dams are in the basin