Olympia Marbled White
2016-05-02 D D 186aaa4
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The Amazon is in very bad shape:
“Amazon Rainforest "Elimination" is much more severe than previously known, rising to a total of 38%, according to Science, the results of a study on the 26th. 38% of the Amazon is in dire distress, including degradation, drought, etc. Earlier in my blog, I wrote about the need for preservation of secondary forests, which are the boundary part of the surrounding areas at least 100m from the wild forest, but I want to reaffirm the need for edge protection with this science paper.
Badman Yoshio Nishioka /HUTAN Group #AmazonDeforestation
So far research into the Amazon ecosystem has focused on the impact of forest fog. However, this study examined the impact of edge effects, in addition to forest fires and storms. Edge effect refers to the effect of external influences of a forest (organic habitat) border area.
Researchers such as Universidade Estadual de Campinas, Brazil analyzed data such as satellite images from 2001-18 years. As a result, it was revealed that 36,000,4748 Km2 has eroded, which accounts for at least 5.5% of the remaining tropical forest during the period. However, given the impact of the drought, the deforestation area rose to 38% of the total remaining forest.
Link: 元データ 「The drivers and impacts of Amazon forest degradation」 https://www.science.org/doi/10.1126/science.abp8622?fbclid=IwAR3lRrlCpxIP6HIERUHtxuRleYkaS1mAUCoyBu_uaC4ZwG64dDv5WprfekE
Most analysis of changes in land use and land damage in the Amazon forests has focused on causes and effects of deforestation. Human disturbance is causing the deforestation of the rest of the Amazon forests, threatening its future. The most important of this type of disturbance are the edge effects (due to forest deforestation and consequent fragmentation of habitat), wood burning, and a seismic drought exacerbated by man-induced climate change. Integrating knowledge about these disturbances that lead to the deforestation of the Amazon forests will have their causes and effects, future invasions, and some part needed to control them.
Analyzing existing data on fires, edging effects, and wood waste from 2001 to 2018, shows that 0.36 x 106 km2 (5.5%) of the Amazon forest is deforestation in some form. This is 112% of turkey. Adding the data on the seismic drought collected in the meantime, the estimated erosion area is 2.5 x 106 km2, which increases to 38% of the remaining Amazon forests. Estimated carbon losses from these forest erosion are between 0.05 and 0.20 Pg C year-1, comparable to carbon loss from forest erosion (0.06 to 0.21 Pg C year -1). The disturbance can cause as much biodiversity loss as deforestation itself, and in forests deforestation deforestation by fire and wood waste, the incidence of erosion can be reduced by 2 ~ 34% during the dry season.
The driving forces at the root of the disruption (expansion of agriculture and demand for timber) bring material benefits to a limited group of regional and global stakeholders, while the burden falls on a broad scale and social groups, ranging from nearby forest dwellers to urban dwellers.
Also in the Andes, the preliminary forecast for 2050 suggests that, regardless of the extent of deforestation, four major disturbances remain a major threat and a source of carbon flax to the atmosphere.
Links2: Recently published paper shows that storms will occur from the deep Amazon to the Andes Mountains in 2070-2090! Data "Amazon windthrow disturbances are likely to increase with storm frequency under global warming"
“The relationship maps convective available potential energy (CAPE) to windthrow density and future increase in CAPE simulated by Earth system models under the high-emission scenario.”
Areas where CAPE exceeds 1023 J kg 231 will increase 51 CAP 20% by the end of the 21st century (Table 1). This shows a much wider area within the Amazon with favorable conditions for the birds. ~1,390,000 square km2 of the Amazon's northwest, southern, and central forested areas in central Colombia, northern Bolivia, southeast Peru, and central Brazil are currently forecasted to be without wind. Wind throwing events will increase by more than eight times by 2100 ( 加 2c). In the northwest and western Amazon, large wind gusts are currently relatively high (2.4 wind speed/10,000 km2), and the number of wind gust events is estimated to increase 33~50% over the next 50~80 years (extra footstep 5c). ).
Links3: A soothing prediction
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