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Primary Productivity
Measuring Photosynthesis
Ascending
By climbing the towers, we can measure only a few specific trees. Using these novel tree climbing techniques, we have been able to access virtually any tree in the forest.
I. the Slingshot
First, Oscar uses a giant slingshot to shoot a lead fishing weight (attached to fishing line) over a suitable branch in the tree. The fishing line is then replaced with parachute cord and then with a 60 m long, 10.6 mm diameter climbing rope. |
II. Getting ready to climb
Next, Nancy prepares to ascend by making sure her harness is secure and that she has all the equipment she needs. |
III. Ascending into the canopy
Nancy begins to climb up the rope using mechanical ascenders (jumars) along with slings that support her legs . |
IV. At the top!
Finally, Nancy reaches her destination! Climbing from the ground to the top of the rope takes about 3 minutes. |
V. Raising up the LICOR
Using a pulley system, the ground crew raises the LiCor portable photosynthesis machine to the desired height. From her position on the rope, the climbers can now measure any leaf that she can reach at any height in the canopy. |
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