Thursday, June 28, 2007

desertification

A news search on the term "desertification" turns up lots of stories. Most stem from a press release of a study conducted by the the United Nations University. What's striking is the scale of the problem and the linkage of cyclical draughts, such as those in Africa, to global warming. The study says maybe 50 million people will flee from newly arid lands in the next 10 years.

Desertification is mainly caused by climate change, erosion, and degradation of soil in dryland areas. Crop raising based on irrigation, cattle farming, and other traditional farming practices exacerbate the problem. The report says the process might be halted by new forms of agriculture, such as encouraging forests in dry land areas. But care must be taken or efforts to help will make matters worse. For example the author of the report says that a tree-planting program in China won't stem the advance of deserts because the trees being planted needed large amounts of water, putting even more pressure on scarce resources.

Here's the press release followed by some images and links:
Desertification: UN experts prescribe global policy overhaul to avoid looming mass migrations

Desertification, exacerbated by climate change, represents “the greatest environmental challenge of our times” and governments must overhaul policy approaches to the issue or face mass migrations of people driven from degraded homelands within a single generation, warns a new analysis from the United Nations University.

Contact: Terry Collins
terrycollins@rogers.com
416-538-8712
United Nations University

In the analysis for presentation June 28 at UN Headquarters, New York, UNU experts say the loss of soil productivity and the degradation of life-support services provided by nature pose imminent threats to international stability. They outline a multi-point prescription for policy reform at every level of government.

“It is imperative that effective policies and sustainable agricultural practices be put in place to reverse the decline of drylands,” says Prof. Hans van Ginkel, UN Under Secretary-General and Rector of UNU.

Land use policy reform is urgently needed to halt overgrazing, over-exploitation, trampling and unsustainable irrigation practices, as are policies to create livelihood alternatives for dryland populations, he says.

Based on input of 200 experts from 25 countries convened in Algiers late last year, the analysis urges governments to adopt a broader, overarching view and a more coordinated, integrated and interlinked approach to dealing with desertification, climate change, poverty reduction and other public concerns.

It highlights dozens of problems and inconsistencies in policy-making today at every level, saying decisions are often taken in isolated sectoral silos, the end results of which, on balance, can be counterproductive.

“Some forces of globalization, while striving to reduce economic inequality and eliminate poverty are contributing to worsening desertification. Perverse agricultural subsidies are one such example,” says Prof. van Ginkel.

One-third of all people on Earth – about 2 billion in number – are potential victims of desertification’s creeping effect. And, left unchecked, the number of people at risk of displacement due to severe desertification is an estimated 50 million over the next 10 years – a sweep of migrants worldwide equal in number to the entire population of South Africa or South Korea.

“Addressing desertification is a critical and essential part of adaptation to climate change and mitigation of global biodiversity losses,” says Prof. van Ginkel. “UNU has led the argument over the last decade that such inter-linkages in policy formulations must be taken.”

“Reforming policies to combat desertification also represent one of the world’s most expedient ways to sequester more atmospheric carbon and help address the climate change issue,” says Zafar Adeel, lead author of the analysis and Director of the UNU’s Canadian-based International Network on Water, Environment and Health.

Policy formulation for combating desertification “has been hindered by the lack of concrete data about rates and extent of desertification,” he adds. “We must, as the global international community interested in desertification, put monitoring and assessment at the top of our policy agenda.”

Desertification shows no sign of abatement: An “environmental crisis” with major impacts

UNU says the main barrier to expanding isolated successes at combating desertification is “the lack of effective management policies.”

In some countries where policies are deemed conducive to addressing desertification, enactment and implementation falls short. Or, designed and implemented at a national level, policies fail to translate into local action. Worse, some policies provide perverse incentives, exacerbating competition and conflict over the use of land and natural resources.

Among many recommendations, the report urges governments and policy-makers to:
    * Reject the notion that aridity and water scarcity are inevitable;
    * Create financial incentives for pastoralists and other dryland users to preserve and enhance the ecosystem services their land provides to all;
    * Accept the carbon sequestration as a measure for simultaneously combating desertification and climate change. While vegetative cover in most drylands is sparse, drylands represent more than 40% of global land area, providing immense opportunities for carbon sequestration;
    * Foster alternative, sustainable livelihoods for dryland dwellers, including non-agricultural jobs in industry and tourism, for example;
    * Yield ownership and decision making to communities: empower them to take charge of land on which they depend and end the pattern of individuals chasing environmentally-detrimental short-term gains;
    * Promote greater transparency and accountability, the participation of multiple actors, information sharing, measurable results, and follow-up systems;
    * Better educate local populations and policymakers, many of whom lack adequate awareness of the fragility of their natural resource base and, in some places, fail to understand fundamental concepts of "drylands" and "desertification;"
    * Put science at the heart of policy making and beef up research on emerging issues such as thresholds or "tipping points" as they relate to migration and desertification; and
    * Improve coordination at all levels:

    Nationally: harmonize policies dispersed across a range of government ministries and agencies; rationalize and link the wide assortment of development, poverty reduction and environmental policy frameworks, independently conceived and "each in their own orbit," to encourage synergies and integration;

    Regionally: to help address transboundary issues such as integrated river basin management and environmental migration; and

    Internationally: better relate global conventions, agreements and other initiatives one to another. The analysis says the separate constitutions, priorities and procedures involved in administering the mix of international agreements operating today prevent important synchronization needed to achieve broad social and environmental goals: food security and famine relief, conflict and migration prevention, better health and poverty reduction, desertification and climate change avoidance and biodiversity protection and enhancement.
The authors urge governments to better define and understand environmental migration – its economic and ecological consequences, and to create a global framework to legally recognize and assist environmental refugees.

“The expected climatic change scenarios as projected by the recently published report of the IPCC give an additional dark shade to an already gloomy picture. However it is difficult to properly quantify the number of environmental migrants and the migration routes as long as the concept itself remains debated even from a scientific point of view,” the analysis says.

UNU advances a classification scheme based on three subgroups of migrants driven predominantly by environmental reasons:
    * Environmentally motivated migrants
    * Environmentally forced migrants
    * Environmental refugees
Finally, the analysis says governments need to measure progress in human-development terms and develop a common set of environmental indicators and data collection methods to enhance consistency for tracking and comparison purposes.

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United Nations University

Established by the U.N. General Assembly in 1973, United Nations University is an international community of scholars engaged in research, advanced training and the dissemination of knowledge related to pressing global problems. Activities focus mainly on peace and conflict resolution, sustainable development and the use of science and technology to advance human welfare. The University operates a worldwide network of research and post-graduate training centres, with headquarters in Tokyo.

UNU-INWEH began operations in 1997 to strengthen water management capacity, particularly of developing countries, and to provide on-the-ground project support. With core funding from the Government of Canada through CIDA, it is hosted by McMaster University, Hamilton, Canada.

source: http://www.worldrevolution.org/



source: http://www.the-human-race.com/pages/about_desertification.htm



Deserts are shown in yellow. Threatened areas are in orange; the darker the color, the greater the threat. Click to view full size; source: http://www.mazerolle.fr/demographie/cours2006/chapitre-03S3d.htm


Links:

UN issues desertification warning
By Matt McGrath
BBC environment reporter
Desertification could displace up to 50m people over the next decade
Tens of millions of people could be driven from their homes by encroaching deserts, particularly in sub-Saharan Africa and Central Asia, a report says. ...

DESERT VOICES
Oral Testimony - Perhaps nowhere in the world are the impacts of desertification more challenging than in Africa, where it is inextricably linked to poverty, migration and food security. These personal accounts from Sudan and Ethiopia highlight the wide-ranging consequences of desertification, from migration for work and conflict over resources, to changes in traditions and women’s roles...

Severity Of Desertification On World Stage
Science Daily (press release) - Jun 19, 2007
Science Daily — Desertification puts the health and well-being of more than 1.2 billion people in more than 100 countries at risk, according to the United ...

Likely Spread of Deserts to Fertile Land Requires Quick Response, U.N. Report Says
The New York Times
By ELISABETH ROSENTHAL
Published: June 28, 2007
ROME, June 27 — Enough fertile land could turn into desert within the next generation to create an “environmental crisis of global proportions,” large-scale migrations and political instability in parts of Africa and Central Asia unless current trends are quickly stemmed, a new United Nations report concludes....

Desertification
From Wikipedia, the free encyclopedia
Desertification is the degradation of land in arid, semi arid and dry sub-humid areas resulting from various climatic variations, but primarily from human activities. Current desertification is taking place much faster worldwide than historically and usually arises from the demands of increased populations that settle on the land in order to grow crops and graze animals....

1 comment:

طموحة مملوحة said...

nice information about the desertification ... luwait is famouse of desertification

thank you