Nông lâm kết hợp: giải pháp ngày càng phổ biến cho một thế giới nóng và đói khát

Thoạt nhìn, các vùng phía Tây Cameroon trông có vẻ tươi tốt [phủ xanh bởi cây cối và rừng], nhưng khi nhìn gần hơn thì thấy đất đai ở khu vực này đã bị suy thoái do canh tác quá mức, kỹ thuật canh tác không bền vững, thảm thực vật bị tàn phá do bị khai thác làm củi và cháy rừng.

Tuy nhiên, ở một số khu vực vẫn tràn ngập đa dạng sinh học: cà phê phát triển dưới bóng mát của cây chuối, gần đó là những cây mận Châu Phi (tên địa phương là cây safou), cây cô la, cam và các loại cây lấy gỗ như gỗ gụ. Đối với người không chuyên thì đây trông giống như một khu rừng tự nhiên, nhưng thực tế đó là một hệ thống nông lâm – kết hợp cây cho bóng mát với cây trồng.

 [Hệ thống nông lâm kết hợp điển hình ở vùng Tây Bắc của Cameroon với chuối và các loại quả địa phương và cây lấy gỗ. Ảnh Ebernezar Asaah]

Visualizing Data to Build Climate Resilience

WRI.org

PREPdata, an open-source platform that improves access to the highly credible information that adaptation decision-makers and practitioners need to plan for climate change.

Webinar Recording

About the Webinar

Decision-makers from urban planners to corporate executives are grappling with tough questions in a changing climate. Should city officials in the Caribbean update building codes to climate-proof infrastructure against storm surges from monster hurricanes like Maria or move to higher ground? Should farmers in drought-prone regions of sub-Saharan Africa adopt more efficient irrigation systems or switch to climate-resilient seeds? Tiếp tục đọc “Visualizing Data to Build Climate Resilience” →

Resource Kit for Building Resilience and Sustainability in Mekong Towns – Bộ công cụ Xây dựng khả năng chống chịu và tính bền vững cho các đô thị vùng sông Mekong

Project Description

Resource Kit for Building Resilience and Sustainability in Mekong Towns

Donor: Asian Development Bank (ADB)     |    Duration: 2013-2014   |    Location: Cambodia, Lao PDR and Vietnam

About: Natural systems are the essential foundation for Mekong town development and rehabilitation. The Resource Kit for Building Resilience and Sustainability in Mekong Towns is a seven-volume kit that promotes the maintenance and use of natural systems as a key strategy for building sustainability and resilience in urban areas. Tiếp tục đọc “Resource Kit for Building Resilience and Sustainability in Mekong Towns – Bộ công cụ Xây dựng khả năng chống chịu và tính bền vững cho các đô thị vùng sông Mekong” →

Hiện tượng thủy triều đỏ trên các vùng biển và đề xuất với Việt Nam

T.S Dư Văn Toán

thiennhien.net

“Thuỷ triều đỏ” là thuật ngữ ngày càng phổ biến và quen thuộc. Nó không thuần chỉ là một hiện tượng tự nhiên tuyệt vời đầy kì bí như nhiều người vẫn nghĩ mà thực chất là một vấn đề môi trường nhức nhối cần quan tâm.

“Thủy triều đỏ” chỉ sự nở hoa của các loài vi tảo biển. Đây là hiện tượng tự nhiên xảy ra do mật độ tế bào vi tảo gia tăng lên đến hàng triệu tế bào/lít (thông thường có khoảng 10 – 100 tế bào vi tảo/ml nhưng trong trường hợp “nở hoa”, mật độ có thể lên trên 10.000 tế bào/ml), làm biến đổi màu của nước biển từ xanh lục đậm, đỏ cho đến vàng xám.
Tiếp tục đọc “Hiện tượng thủy triều đỏ trên các vùng biển và đề xuất với Việt Nam” →

Climate change promotes the spread of mosquito and tick-borne viruses

sciencedaily.com

March 16, 2018

Source:European Commission Joint Research Centre

Summary:Scientists find that global warming has allowed disease-bearing insects to proliferate, increasing exposure to viral infections.

FULL STORY

Spurred on by climate change, international travel and international trade, disease-bearing insects are spreading to ever-wider parts of the world.

This means that more humans are exposed to viral infections such as Dengue fever, Chikungunya, Zika, West Nile fever, Yellow fever and Tick-borne encephalitis.

For many of these diseases, there are as yet no specific antiviral agents or vaccines.

Global warming has allowed mosquitoes, ticks and other disease-bearing insects to proliferate, adapt to different seasons, migrate and spread to new niche areas that have become warmer.
Tiếp tục đọc “Climate change promotes the spread of mosquito and tick-borne viruses” →

Vietnam and U.N. to build storm-proof housing for coastal communities

Vietnam is one of 10 countries most affected by climate change, according to the latest annual Climate Risk Index published by the research organization Germanwatch.

Coastal residents are particularly vulnerable as storms increase in frequency and intensity. They are often trapped in poverty, accumulating debt or spending savings to rebuild or repair their homes, businesses and possessions.

Tiếp tục đọc “Vietnam and U.N. to build storm-proof housing for coastal communities” →

Delta braces for forest fires

vietnamnews Update: March, 10/2018 – 09:00

The U Minh Hạ National Park in Cà Mau Province. — VNA/VNS Photo Huỳnh Thế Anh
Viet Nam News HCM CITY — Local authorities in the Cửu Long (Mekong) Delta have stepped up efforts to prevent forest fires even as the region enters the highly risky dry season.

In the southernmost province of Cà Mau, many measures have been put in place, especially to protect the 8,500ha U Minh Hạ National Park. Tiếp tục đọc “Delta braces for forest fires” →

Mekong Delta braces for salt intrusion

vietnamnews Update: March, 09/2018 – 09:00

Agricultural officials construct a temporary dam to prevent salt intrusion in the Mekong Delta province of Hậu Giang. — VNA/VNS Photo Duy Khương
Viet Nam News HCM CITY — Authorities and people living in the coastal areas of the Cửu Long (Mekong) Delta have taken several measures to prevent saltwater intrusion, including building of dams.

Trần Bình Trọng, head of the Kiên Lương District Infrastructure Economy Bureau in Kiên Giang Province, said the district has built a dam on Canal 6 to prevent saltwater intrusion. Tiếp tục đọc “Mekong Delta braces for salt intrusion” →

Secretary-General Appoints Michael R. Bloomberg of United States Special Envoy for Climate Action

UN.org

United Nations Secretary-General António Guterres announced today the appointment of Michael R. Bloomberg of the United States as his Special Envoy for Climate Action.

Mr. Bloomberg will support the Secretary-General’s climate strategy and efforts towards the planned 2019 Climate Summit at United Nations Headquarters.  The Summit will mobilize stronger and more ambitious action towards 2020 climate targets.  The Special Envoy will leverage efforts in key areas of the Summit to encourage rapid and enhanced implementation of the Paris Agreement on climate change in the context of sustainable development.
Tiếp tục đọc “Secretary-General Appoints Michael R. Bloomberg of United States Special Envoy for Climate Action” →

Houses that Float on Water

Global Resilience Partnership
Author: Ida Gabrielsson
Posted on 26 February 2018


Photo by Tony Lam Hoang on Unsplash

A Water Window project honored at COP 23 as a Best Climate Practice.

The Buoyant Foundation Project (BFD), Development of Amphibious Homes for Marginalized and Vulnerable Populations led by architecture professor Dr. Elizabeth English of the University of Waterloo, Canada was honored as a Best Climate Practice. The honor was presented by the Initiative on Climate Change Policy and Governance (ICCG) at the 23rd Conference of Parties (COP) to the United Nations Framework Convention on Climate Change (UNFCC) in Bonn, Germany.

The BFD project was one of 12 projects that received funding from the Global Resilience Partnership Water Window Challenge (Water Window) by Zurich Insurance Group and the Z Zurich Foundation in 2017. Tiếp tục đọc “Houses that Float on Water” →

Cống đập chặn mặn gây rối loạn hệ sinh thái và cái giá phải trả

VOA 

Biểu đồ độ lún và vận tốc đất lún trong 25 năm tại Đồng Bằng Sông Cửu Long. [nguồn: Environ.Res.Lett. 12 (2017) với ghi chú của KS Phạm Phan Long, Viet Ecology Foundation]. Hiện nay, rất nhiều giếng tầng nông và bơm bằng tay đều bị nhiễm mặn nhiễm phèn, nước giếng không còn dùng được, và nay người nông dân phải khoan sâu 400-500m để tìm được nguồn nước ngọt, mặt bằng ĐBSCL đang bị sụt lún nhanh chóng vì các tầng nước ngầm đang bị tận cùng khai thác.
Biểu đồ độ lún và vận tốc đất lún trong 25 năm tại Đồng Bằng Sông Cửu Long. [nguồn: Environ.Res.Lett. 12 (2017) với ghi chú của KS Phạm Phan Long, Viet Ecology Foundation]. Hiện nay, rất nhiều giếng tầng nông và bơm bằng tay đều bị nhiễm mặn nhiễm phèn, nước giếng không còn dùng được, và nay người nông dân phải khoan sâu 400-500m để tìm được nguồn nước ngọt, mặt bằng ĐBSCL đang bị sụt lún nhanh chóng vì các tầng nước ngầm đang bị tận cùng khai thác.

Ngô Thế Vinh (Gửi Nhóm Bạn Cửu Long)

Water, water, every where,
Nor any drop to drink.
Samuel Taylor Coleridge [1772-1834]

Thế kỷ 21 của tỵ nạn môi sinh, đã có 2 triệu người
phải rời bỏ quê hương ĐBSCL ra đi tìm kế sinh nhai

Hình ảnh một dòng sông đang chết dần; cũng để hiểu tại sao đã có 2 triệu người phải rời bỏ quê hương ĐBSCL đi tìm kế sinh nhai; từ phải: TS Lê Anh Tuấn, Th.S Nguyễn Hữu Thiện. [photo by Ngô Thế Vinh]
Hình ảnh một dòng sông đang chết dần; cũng để hiểu tại sao đã có 2 triệu người phải rời bỏ quê hương ĐBSCL đi tìm kế sinh nhai; từ phải: TS Lê Anh Tuấn, Th.S Nguyễn Hữu Thiện. [photo by Ngô Thế Vinh]

Tiếp tục đọc “Cống đập chặn mặn gây rối loạn hệ sinh thái và cái giá phải trả” →

Sea-level legacy: 20cm more rise by 2300 for each 5-year delay in peaking emissions

02/20/2018 – Peaking global CO2 emissions as soon as possible is crucial for limiting the risks of sea-level rise, even if global warming is limited to well below 2°C. A study now published in the journal Nature Communications analyzes for the first time the sea-level legacy until 2300 within the constraints of the Paris Agreement. Their central projections indicate global sea-level rise between 0.7m and 1.2m until 2300 with Paris put fully into practice. As emissions in the second half of this century are already outlined by the Paris goals, the variations in greenhouse-gas emissions before 2050 will be the major leverage for future sea levels. The researchers find that each five year delay in peaking global CO2 emissions will likely increase median sea-level rise estimates for 2300 by 20 centimeters.

Sea-level legacy: 20cm more rise by 2300 for each 5-year delay in peaking emissions

Every delay in peaking emissions by 5 years between 2020 and 2035 could mean additional 20 cm of sea-level rise (Mengel et al 2018)

Tiếp tục đọc “Sea-level legacy: 20cm more rise by 2300 for each 5-year delay in peaking emissions” →

Provinces improve response to climate change

vietnamnews Update: February, 08/2018 – 06:00

Lessons learned from the strategic mainstreaming of ecosystem-based adaptation (EbA) was a good foundation for Việt Nam to prepare for climate change. — Photo tuoitre.vn

HÀ NỘI — Lessons learned from the strategic mainstreaming of ecosystem-based adaptation (EbA) was a good foundation for Việt Nam to prepare for climate change, according to Dr. Nguyễn Thế Chinh from the Natural Resources and Environment Strategic Institute.

Dr Chinh was speaking on Tuesday at a workshop reviewing a project on the subject. It was held by the Institute for Strategy and Policy on Natural Resources and Environment in collaboration with the German Development Co-operation Agency. The event marked more than three years of productive collaboration.

The Euro 4-million (US$4.9 million) project funded by the German Society for International Co-operation (GIZ) worked with the Vietnamese Government to mainstream ecosystem-based measures into pilot models in Hà Tĩnh and Quảng Bình provinces.

“After three years of implementation, the project evaluated the vulnerable ecological situation in Hà Tĩnh and Quảng Bình provinces,” Chinh said.

“The project also helped to set up a national plan of land use for 2016-2020, and an updated action plan for climate change preparedness until 2020 in the provinces,” he added.

The EbA project aims to support efforts in the strategic mainstreaming of ecosystem-based approaches into national policies on climate change adaptation, land-use and development planning.

EbA has been identified as an effective adaptation measure given that Việt Nam is heavily affected by the adverse effects of climate change.

Climate change vulnerability assessments have been conducted at both provincial and commune levels to introduce appropriate EbA solutions for implementation in the selected provinces.

From 2016, the project began pilot EbA activities in coastal areas suffering erosion and sand movement in Quảng Bình Province by planting and rehabilitating coastal forests in combination with livelihood activities, such as cattle-raising, fresh- water fish farming, and vegetable cultivation.

In Hà Tĩnh, the project piloted EbA approaches in a mountain ecosystem under drought conditions, enriching natural forest by using indigenous plants, oranges and pineapples grown in contour lines – plus bee-raising.

The two areas selected for the pilot EbA approaches shared common characteristics. Firstly, the communities in both areas showed real enthusiasm to participate; and secondly, they lived in areas suffering from difficult economic conditions, with limited access to the technologies required for agricultural production.

Strengthening the capacity of stakeholders at central and local levels was a key aspect of the project.

To improve knowledge and the sharing of information on EbA measures and activities, the project organised a series of training workshops on mainstreaming them into the development planning process.

The project also focused on mainstreaming EbA into the climate-change-adaptation legal framework by supporting Government agencies. For example, the Department of Land Management will implement strategic environmental assessments to collect inputs for revising national land-use planning for 2016-2020; the Department for Planning Management will mainstream EbA and climate-change issues into developing the Planning Law; and the departments of Natural Resources and Environment of Hà Tĩnh and Quảng Bình will mainstream EbA into the updated Provincial Climate Change Action Plans to 2020.

Ivo Litzenberg, GIZ expert, said after three years of implementation, the two provinces had cleaner water resources and a healthier ecological system which was less vulnerable to climate-change impacts.

Land erosion was also reduced, which helped local people produce rice crops on slopes, said Litzenberg.

The project had also helped local people understand the importance of production thast was less harmful to ecological systems, he said.

Meanwhile, according to Phan Lam Sơn, deputy head of Hà Tĩnh Province’s Natural Resources and Environment Department, the project helped people become aware of main reasons for climate change, such as improper use of natural resources, waste discharge and polluting the environment.

Việt Nam was assessed as one of nations worst affected by climate change.

If the sea water level rise by one metre, 40 per cent of land area in Cửu Long (Mekong) Delta, 11 per cent of land in the Hồng Delta, and 3 per cent of land areas along other coastal regions would be submerged.

About 10-12 per cent of population would be affected and losses would account for 10 per cent of the country’s GDP, said experts.

Understanding the consequences, the Government has issued several legal documents to deal with the situation, including a National Programme on Climate Change Preparedness, National Strategy on Climate Changes, National Strategy on Natural Calamity Reduction by 2020. — VNS

Bigger, Faster Avalanches, Triggered by Climate Change

The Newyorktimes

A deadly 2016 glacier collapse in Tibet surpassed scientists’ expectations — until it happened again. They worry it’s only the beginning.

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A satellite image showing the aftermath of two avalanches in western Tibet in 2016, when two glaciers on the Aru range collapsed and spread across five miles. Researchers say this unusual event was due to climate change. 

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When 247 million cubic feet of snow and ice collapsed off a glacier in the dry, mountainous region of western Tibet in 2016, the roiling mass took with it nine human lives and hundreds of animals, spreading more than five miles in three minutes at speeds of nearly 200 miles per hour. The event surprised scientists, who had seen a collapse that big and that fast only once before.

Tiếp tục đọc “Bigger, Faster Avalanches, Triggered by Climate Change” →

Last three years were hottest on record, says UN weather agency

© Loic Venance, AFP | Dry river bed of the Loire in Montjean-sur-Loire, western France, on September 7, 2017.

Text by NEWS WIRES

Latest update : 2018-01-18

Last year was the second or third warmest on record behind 2016, and the hottest without an extra dose of heat caused by an El Niño event in the Pacific Ocean, the United Nations said on Thursday.Average surface temperatures in 2017 were 1.1 degree Celsius (2.0 Fahrenheit) above pre-industrial times, creeping towards a 1.5C (2.7F) ceiling set as the most ambitious limit for global warming by almost 200 nations under the 2015 Paris climate agreement. Tiếp tục đọc “Last three years were hottest on record, says UN weather agency” →