How does deforestation accelerate global warming?

Answer 1

In two ways. 1. Trees absorb carbon dioxide to produce glucose, so if trees are cut down they obviously stop doing that. 2. When the trees are cut down, the carbon stored in them becomes carbon dioxide again when the wood is burned or rotted.

Answer 2

New climate modeling research from LLNL and the Carnegie Institution shows that northern temperate forests may contribute to global warming, while tropical forests can help keep global temperatures cool.

In theory, growing a forest may sound like a good idea to fight global warming, but in temperate regions, such as the United States, those trees also would soak up sunlight, causing the earth’s surface to warm regionally by up to 8 degrees Fahrenheit.

Forests affect climate in three different ways: they absorb the greenhouse gas, carbon dioxide, and help to keep the planet cool; they evaporate water to the atmosphere, which also helps keep the planet cool; and they are dark and absorb a lot of sunlight, warming the Earth.

Using climate models, researchers from Lawrence Livermore National Laboratory and the Carnegie Institution Department of Global Ecology have found that forests in the mid-latitude regions of the Earth present a more complicated picture. Trees in these areas tend to warm the Earth in the long run.

The darkness of these forests absorbs abundant sunlight, warming the land. While the darkness of the forest lasts forever, the effect of the forest sequestering carbon dioxide slows down over time as the atmosphere exchanges CO² with the ocean.

Forests produce over 10°C (18°F) of warming in parts of the northern hemisphere due primarily to increased absorption of solar radiation. Forests produce several degrees of cooling in tropical areas, primarily due to increased evapotranspiration (evaporation).

Direct warming associated with forest cover between between 20°N and 50°N. (These are results from actual vegetation with added forests in the mid-latitudes minus the results for bare ground.) Mid-latitude forests can produce warming locally of up to 6°C (10°F).

The conclusion: Planting a forest in the United States could cool the Earth for a few decades, but would lead to planetary warming in the long term. “On time scales longer than a few centuries, the net effect will actually be warming in these regions,” said Govindasamy Bala of the Livermore team. “We thought planting trees across the northern hemisphere would help curb global warming by the CO² absorption but what we found was a different story.”

Answer 3

there are two ways tree's help cool the earth. the first is that tree's breathe in carbon dioxide, a greenhouse gas, and breathe out oxygen. Greenhouse gases help warm the planet, so this helps cool it. the second is that tree's absorb the energy of the sunlight and store it in chemical energy (ATP). if it hits, say, a road, instead of a tree, that energy of the sunlight goes directly into heat

Answer 4

they're killing the trees which keeps u cool and aallows u to BREATH by taking in the carbon dioxide id ppl would leave the god damn trees alone we probably wouldn't have to worry about global warming so uch