This blog contains articles and commentary on Climate Change / Global Warming. These changes will have an affect on the entire planet and all of us who reside therein.
Life as we know it will change drastically. There is also the view that there is a high likelihood of climate change being a precursor of conflits triggered by resource shortges.
Showing posts with label desertification. Show all posts
Showing posts with label desertification. Show all posts
Earth’s largest hot desert, the Sahara, is getting bigger, a new study finds. It is advancing south into more tropical terrain in Sudan and Chad, turning green vegetation dry and soil once used for farming into barren ground in areas that can least afford to lose it.
Yet it is not just the spread of the Sahara that is frightening, the researchers say. It’s the timing: It is happening during the African summer, when there is usually more rain. But the precipitation has dried up, allowing the boundaries of the desert to expand.
“If you have a hurricane come suddenly, it gets all the attention from the government and communities galvanize,” said Sumant Nigam, a professor of atmospheric and oceanic science at the University of Maryland and the senior author of the study. “The desert advance over a long period might capture many countries unawares. It’s not announced like a hurricane. It’s sort of creeping up on you.”
The study was published Thursday in the Journal of Climate. The authors said that although their research focused only on the Sahara, it suggests that climate changes also could be causing other hot deserts to expand — with potentially harsh economic and human consequences.
Deserts form in subtropical regions because of a global weather circulation called the Hadley cell. Warm air rises in the tropics near the equator, producing rain and thunderstorms. When the air hits the top of the atmosphere, it spreads north and south toward the poles. It does not sink back down until it is over the subtropics, but as it does, the air warms and dries out, creating deserts and other areas that are nearly devoid of rain. Read More
Every year, we lose 24 billion tons of fertile soil to erosion and 12 million hectares of land to desertification and drought. This threatens the lives and livelihoods of 1.5 billion people now.
In the future, desertification could displace up to 135 million people by 2045. Land degradation could also reduce global food production by up to 12% and push world food prices up by 30%. In Egypt, Ghana, Central African Republic, Pakistan, Tajikistan and Paraguay, land degradation could cause an annual GDP loss of up to 7%.
Pressure on land resources is expected to increase as populations grow, socio-economic development happens and the climate changes. A growing population will demand more food, which means that unsuitable or especially biodiverse land will be claimed for farming and be more vulnerable to degradation. Increased fertilizer and pesticide use related to agriculture will increase nutrient loading in soils, causing eutrophication and declines in fertility over time. Climate change will also aggravate land degradation—especially in drylands, which occupy 40% of global land area, and are inhabited by some 2 billion people. Urban areas, which are located in the world’s highly fertile areas, could grow to account for more than 5% of global land by mid-century.
Unless we manage our land better, every person will rely on just .11 hectares of land for their food; down from .45 hectares in 1960.
So how do we manage land better?
It will all come down to what we do with our soil, which is the most significant natural capital for ensuring food, water, and energy security while adapting and building resilience to climate change and shocks. The soil’s nutrient cycling provides the largest contribution (51%) of the total value (USD33 trillion) of all ‘ecosystem services’ provided each year. But soil’s important function is often forgotten as the missing link in our pursuit of sustainable development.
We must invest in applicable solutions that are transformative, and can be scaled up. Climate-smart agriculture is an alternative approach to managing land sustainably whilst increasing agricultural productivity. It includes land management options that sequester carbon and enhance resilience to climate change. Proven climate-smart practices such as agroforestry, integrated soil fertility management, conservation agriculture, and improved irrigation can ensure that land is used optimally, restored and managed in a manner that maximizes ecological, economic and social benefits.
But climate-smart agriculture requires conducive policy frameworks, increased investment, and judicious policy management. Rural poverty is often a product of policies that discriminate against small landholders, forcing them off the land, creating sub-optimal land use outcomes, and long term degradation. Secure land rights are necessary for climate-smart agriculture, providing incentives for local communities to manage land more sustainably. In Rwanda, for instance, land tenure reform rapidly doubled investment in soil conservation, with even larger increases for plots managed by female farmers.
Second, there is need for increased national investment in climate smart agriculture. For technologies such as conservation agriculture that require substantial up-front investment in machinery and other inputs, schemes such as those involving payment for ecosystem services may be more effective in promoting CSA technology adoption. For technologies such as agroforestry systems, innovative finance mechanisms that help farmers bridge the period between when trees are planted, mature and generate income can be decisive.
Third, in some cases, direct public investment in landscape restoration and rehabilitation can bring about sizeable livelihood benefits and create better conditions for attracting further investments by farmers and communities. The China Loess Plateau is a well-documented success story of landscape restoration. Similar experiences are happening in Ethiopia, Kazakhstan and Senegal.
Fourth, a number of improved land management technologies are knowledge-intensive, and promoting their adoption will require training. Conservation agriculture for instance entails sophisticated combinations of no-tillage, residue management, use of cover crops, and other activities and practices that many farmers have limited experience with. The knowledge base of local land management practices can also be improved through targeted capacity development programs.
Many demand-side interventions can strategically break the adoption barriers associated with climate-smart practices. These include: providing farmers with improved weather forecasting, weather-indexed crop insurance, and measures to reduce production variability such as drought-tolerant crops, deep-rooted crops, and irrigation. These should be combined with supply-side measures such as lowering trade barriers to increase national and regional market size, improving road and rail infrastructure to lower transport costs, and improving market information systems to increase farmers’ access to markets.
Lastly, public support is as crucial as the amount of support to fully realize the productivity, adaptation, and mitigation benefits in agriculture. Public support that focuses on research, investments in improved land management, and land tenure rather than on input support is generally more effective, benefits more farmers, and is more sustainable in the long run.
Actions to reduce the negative impacts of land degradation and desertification must indeed go hand in hand with interventions that eradicate poverty and address inequality. Without them, we will not end poverty and boost shared prosperity. More
Every year, we lose 24 billion tons of fertile soil to erosion and 12 million hectares of land to desertification and drought. This threatens the lives and livelihoods of 1.5 billion people now.
In the future, desertification could displace up to 135 million people by 2045. Land degradation could also reduce global food production by up to 12% and push world food prices up by 30%. In Egypt, Ghana, Central African Republic, Pakistan, Tajikistan and Paraguay, land degradation could cause an annual GDP loss of up to 7%.
Pressure on land resources is expected to increase as populations grow, socio-economic development happens and the climate changes. A growing population will demand more food, which means that unsuitable or especially biodiverse land will be claimed for farming and be more vulnerable to degradation. Increased fertilizer and pesticide use related to agriculture will increase nutrient loading in soils, causing eutrophication and declines in fertility over time. Climate change will also aggravate land degradation—especially in drylands, which occupy 40% of global land area, and are inhabited by some 2 billion people. Urban areas, which are located in the world’s highly fertile areas, could grow to account for more than 5% of global land by mid-century.
Unless we manage our land better, every person will rely on just .11 hectares of land for their food; down from .45 hectares in 1960.
So how do we manage land better?
It will all come down to what we do with our soil, which is the most significant natural capital for ensuring food, water, and energy security while adapting and building resilience to climate change and shocks. The soil’s nutrient cycling provides the largest contribution (51%) of the total value (USD33 trillion) of all ‘ecosystem services’ provided each year. But soil’s important function is often forgotten as the missing link in our pursuit of sustainable development.
We must invest in applicable solutions that are transformative, and can be scaled up. Climate-smart agriculture is an alternative approach to managing land sustainably whilst increasing agricultural productivity. It includes land management options that sequester carbon and enhance resilience to climate change. Proven climate-smart practices such as agroforestry, integrated soil fertility management, conservation agriculture, and improved irrigation can ensure that land is used optimally, restored and managed in a manner that maximizes ecological, economic and social benefits.
But climate-smart agriculture requires conducive policy frameworks, increased investment, and judicious policy management. Rural poverty is often a product of policies that discriminate against small landholders, forcing them off the land, creating sub-optimal land use outcomes, and long term degradation. Secure land rights are necessary for climate-smart agriculture, providing incentives for local communities to manage land more sustainably. In Rwanda, for instance, land tenure reform rapidly doubled investment in soil conservation, with even larger increases for plots managed by female farmers.
Second, there is need for increased national investment in climate smart agriculture. For technologies such as conservation agriculture that require substantial up-front investment in machinery and other inputs, schemes such as those involving payment for ecosystem services may be more effective in promoting CSA technology adoption. For technologies such as agroforestry systems, innovative finance mechanisms that help farmers bridge the period between when trees are planted, mature and generate income can be decisive.
Third, in some cases, direct public investment in landscape restoration and rehabilitation can bring about sizeable livelihood benefits and create better conditions for attracting further investments by farmers and communities. The China Loess Plateau is a well-documented success story of landscape restoration. Similar experiences are happening in Ethiopia, Kazakhstan and Senegal.
Fourth, a number of improved land management technologies are knowledge-intensive, and promoting their adoption will require training. Conservation agriculture for instance entails sophisticated combinations of no-tillage, residue management, use of cover crops, and other activities and practices that many farmers have limited experience with. The knowledge base of local land management practices can also be improved through targeted capacity development programs.
Many demand-side interventions can strategically break the adoption barriers associated with climate-smart practices. These include: providing farmers with improved weather forecasting, weather-indexed crop insurance, and measures to reduce production variability such as drought-tolerant crops, deep-rooted crops, and irrigation. These should be combined with supply-side measures such as lowering trade barriers to increase national and regional market size, improving road and rail infrastructure to lower transport costs, and improving market information systems to increase farmers’ access to markets.
Lastly, public support is as crucial as the amount of support to fully realize the productivity, adaptation, and mitigation benefits in agriculture. Public support that focuses on research, investments in improved land management, and land tenure rather than on input support is generally more effective, benefits more farmers, and is more sustainable in the long run.
Actions to reduce the negative impacts of land degradation and desertification must indeed go hand in hand with interventions that eradicate poverty and address inequality. Without them, we will not end poverty and boost shared prosperity. More
Environment – Climate – World Day to Combat Desertification (June 17, 2015)
On World Day to Combat Desertification, dedicated this year to the theme “Attainment of food security for all through sustainable food systems,” France reaffirms its commitment to sustainable land management.
The challenge is twofold: feeding humanity while preserving the environment. France allocates €200 million per year to concrete projects to combat desertification and land degradation, mainly through the French Development Agency. The International Civil Society Forum, “Désertif'Action 2015,” recently brought together in Montpelier 300 participants from 60 countries.
Combating desertification will help to improve capacity to absorb carbon, adapt to climate change and stabilize populations in areas that remain habitable. It’s key to the success of COP21 and the reason behind the “4 pour 1000” (4 per thousand) initiative backed by France, which combines the restoration of degraded land, food production and the fight against climate disruption and is aimed at increasing soil organic matter levels by 4 parts per thousand per year.
Climate - European Climate Diplomacy Day (June 17, 2015)
On the occasion of the second edition of European Climate Diplomacy Day, Laurent Fabius will receive, at the Quai d’Orsay, more than 50 European ambassadors and diplomats, who will travel there from the Champs Élysées by bicycle. By doing so, they will demonstrate their commitment to ensuring the success of the 2015 Paris Climate Conference and their support for Laurent Fabius, COP21 President.
In almost 60 countries on five continents, French diplomats will participate together with their British, German and EU colleagues in events aimed at raising awareness among the general public and policymakers.
Televised interviews, round tables, exhibitions, screenings, training workshops for journalists, the awarding of climate scholarships and even stage plays will facilitate exchanges with the public and highlight the practical measures already undertaken to reduce carbon emissions.
Excerpts from the daily press briefing by Romain Nadal, French Ministry of Foreign Affairs and international Development' spokesman (Paris, june 17th 2015)
“Desertification is a fancy word for land that is turning to desert,” begins Allan Savory in this quietly powerful talk. And it's happening to about two-thirds of the world’s grasslands, accelerating climate change and causing traditional grazing societies to descend into social chaos. Savory has devoted his life to stopping it. He now believes — and his work so far shows — that a surprising factor can protect grasslands and even reclaim degraded land that was once desert.
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