More than 120 ICTA-UAB researchers addressed environmental challenges at a symposium, especially those arising from global and...

The Institut of Environmental Science and Technology of the Universitat Autònoma de Barcelona (ICTA-UAB) organized its 1st Spring Symposium with the aim of addressing some of the main environmental and sustainability challenges.

Call for 2 Post-doc Fellowships for Climate Change Research

Call for 2 Post-doc Fellowships for Climate Change Research.

Spain: Industry sides with science

Organizations of the industry, and associations connected to R+D+i express their support towards research, backing the petition of the Severo Ochoa and María de Maeztu alliance (SOMMa) which advocates in favour of the political class acting to clear the administrative problems currently affecting science in Spain.

Low-carbon energy transition requires more renewables than previously thought

A new study by ICTA-UAB analyzes the impacts on lifestyles of substituting fossil fuels for cleaner energies.

Are Farmers Who Belong to Local User Associations Better Adapted to Climate Change?

Droughts, floods and high temperatures derived from climate change are not the only threats that farmers with irrigated crops must face.

Se prevén niveles de polen altos para esta primavera

 Investigadores de la Red Aerobiològica de Catalunya del ICTA-UAB y del Departamento de Biología Animal, Biología Vegetal y Ecología de la UAB han presentado hoy las previsiones de los niveles de polen y esporas en la atmósfera en Catalunya para la primavera y el verano.

Climate Change Threatens World's Largest Seagrass Carbon Stores

Shark Bay seagrass carbon storage hotspot suffers alarming losses after a devastating marine heat wave, according to a study led by ICTA-UAB researchers.

Amazon's indigenous people hunt animals feeding in areas contaminated by oil spills

A study by the ICTA-UAB and the UAB Department of Animal Health and Anatomy demonstrates that the main species hunted by the indigenous popoulations of the Peruvian Amazon ingest water and soil contaminated with hidrocarbons and heavy metals.

The new Planttes app warns of allergy risks in different urban areas

The Planttes application is a citizen science project which aims to encourage people to identify and locate on a map the existence of allergy-causing plants and indicate their phenological state.

Global climate treaty easier to negotiate if guided by Human Development Index

A study by ICTA-UAB concludes that agreements against climate change would be more attractive to rich countries if they were analyzed taking into account the Human Development Index, instead of GDP.

1ST ICTA-UAB SPRING SYMPOSIUM

1ST ICTA-UAB SPRING SYMPOSIUM.

New Project to Link Extreme Weather Events, Atmospheric Biodiversity and Human Health

A new ICTA-UAB project led by researcher Jordina Belmonte will study the effects of extreme meteorological events on the biological biodiversity present in the atmosphere in order to predict changes in the environment and possible affectations on human health.

Bolivian Amazon on road to deforestation

Amazon biodiversity hotspot to suffer even more “alarming” losses after contentious law passed, according to a study involving ICTA-UAB researchers.

ICTA-UAB’s success: five ERC grants in two years

The Institute of Environmental Science and Technology of the Universitat Autònoma de Barcelona (ICTA-UAB) has been awarded five European Research Council (ERC) grants in two years, which is about ten per cent of all ERC grants arriving in Catalonia over the period from the end of 2015 to the end of 2017.

Scientists Alert of Swift Degradation of Marine Ecosystems and Grave Consequences for the Planet

A book edited by researchers from the ICTA-UAB, the UB, the CNRS and the IEO addresses the concept of "animal forest" and highlights the importance of the role seas and oceans have in combating climate change.

ICTA-UAB researcher Victoria Reyes-García receives an ERC Consolidator Grant

ICREA researcher at ICTA-UAB Victoria Reyes- García has been graced with a Consolidator Grant of the European Research Council (ERC) for the development of a project aimed at bringing insights from local knowledge to climate change research.

Research to study the health effects of forests

The ICTA-UAB, CREAF and the "la Caixa" Bank Foundation recently presented the project "Healthy Forests for a Healthy Society".

Launch of the Alliance of Severo Ochoa Centres and Maria de Maeztu Units of Excellence

​ The Secretary of State for R&D+i, Carmen Vela, chaired the kickoff meeting of the new Severo Ochoa and Maria Maeztu Alliance of Excellence.

Green gentrification can limit the favourable effects of green areas on health

A scientific research conducted by ICTA-UAB and IMIM suggests that more socially disadvantaged neighbours do not benefit equally from the effects newly created green areas have on health.

EJAtlas Includes 2,100 Case Studies on Socio-Environmental Conflicts Around the World

The Environmental Justice Atlas (EJAtlas), created by researchers of the Institute of Environmental Science and Technology of the Universitat Autònoma de Barcelona (ICTA-UAB), currently includes 2,100 cases of ecological distribution conflicts identified in different parts of the world.

Ice age thermostat prevented extreme climate cooling

During the ice ages, an unidentified regulatory mechanism prevented atmospheric CO2 concentrations from falling below a level that could have led to runaway cooling, reports a study conducted by researchers of the ICTA-UAB and published online in Nature Geoscience this week.

New ICTA-UAB 'Welcome Guide'

The new ICTA-UAB 'Welcome Guide' it is at your disposal now. With this document, we aim to help you discover the basics of the PhD programme, ICTA-UAB’s structure, etc.
News
Fukushima and the oceans: what do we know, 5 years on?

Date: 2016-07-01

A major international review of the state of the oceans 5 years after the Fukushima disaster shows that radiation levels are decreasing rapidly except in the harbour area close to the nuclear plant itself where ongoing releases remain a concern. At the same time, the review’s lead author expresses concern at the lack of ongoing support to continue the radiation assessment, which he says is vital to understand how the risks are changing.

These are the conclusions of a major 5 year review, with multi-international authors who are all working together as part of a Scientific Committee on Oceanic Research (SCOR) Working Group http://www.whoi.edu/CMER/rio5-working-group. The report is being presented at the Goldschmidt geochemistry conference in Japan. The review paper is also published in Annual Review of Marine Science*. The main points made by the report are:

The accident
The Tohoku earthquake and tsunami on March 11, 2011 led to the loss of power and overheating at the Fukushima Daiichi Nuclear Power Plants (FDNPP), causing extensive releases of radioactive gases, volatiles and liquids, in particularly to the coastal ocean. The radioactive fall-out on land is well-documented, but the distribution of radioactivity in the seas and onto the wider oceans is much more difficult to quantify, due to variability in the ocean currents and greater difficulty in sampling.

Initial release of radioactive material
Although the FDNPP accident was one of the largest nuclear accidents and unprecedented for the ocean, the amount of 137Cs released was around 1/50th of that released by the fall out of nuclear weapons and 1/5th that released at Chernobyl. It is similar in magnitude to the intentional discharges of 137Cs from the nuclear fuel reprocessing plant Sellafield.

Initial fallout
The main release of radioactive material was the initial venting to the atmosphere. Models suggest that around 80% of the fallout fell on the ocean, the majority close to the FDNPP. There was some runoff from the land, peaking around 6 April 2011. There is a range of estimates of the total amount of 137Cs release into the ocean, with estimates clustering around 15-25 PBq (PetaBecquerel, which is 1015 Becquerel. One Becquerel is one nuclear decay per second). Other radioisotopes were also released, but the focus has been on radioactive forms of Cs given their longer half-lives for radioactive decay (134Cs = 2 yrs; 137Cs = 30 yrs) and high abundance in the FDNPP source.

Distribution in water
 Cs is very soluble, so it was rapidly dispersed in the ocean. Prevailing sea currents meant that some areas received more fall-out than others due to ocean mixing processes. At its peak in 2011, the 137Cs signal right at the FDNPP was tens of millions of times higher than prior to the accident.  Over time, and with distance from Japan, levels decrease significantly. By 2014 the 137Cs signal 2000km North of Hawaii was equivalent to around six times that remaining from fallout from atmospheric nuclear tests from the 1960’s, and about 2-3 times higher than prior fallout levels along the west coast of N. America. Most of the fallout is concentrated in the top few hundred metres of the sea. It is likely that maximum radiation levels will be attained off the North American coast in the 2015-16 period, before declining to 1-2 Bq per cubic metre (around the level associated with background nuclear weapon testing) by 2020. Sea-floor sediments contain less than 1% of the 137Cs released by the FDNPP, although the sea-floor contamination is still high close to the FDNPP.  The redistribution of sediments by bottom-feeding organisms (more common near the coast) and storms is complex.

Uptake by marine life
In 2011, around half the fish samples in coastal waters off Fukushima had radiocesium levels above the Japanese 100Bq/kg limit, but by 2015 this had dropped to less than 1% above the limit. High levels are still found in fish around the FDNPP port. High levels of 131I were measured in fish in April 2011, but as this has a short radioactive half-life, it is now below detection levels. Generally, with the exception of species close to the FDNPP, there seem to be little long-term measurable effects on marine life.

Risk to Humans
The radiation risk to human life is comparatively modest in comparison to the 15,000 lives were lost as a result to the Tohoku earthquake and tsunami. So far, there have been no direct radiation deaths. The most exposed FDNPP evacuees received a total dose of 70 mSv, which (if they are representative of the general population) would increase their lifetime fatal cancer risk from 24% to 24.4%. However, there are still over 100,000 evacuees from the Fukushima area, and many industries such as fishing and tourism have been badly hit.

Paper reference
Buesseler, K.O., Dai, M., Aoyama, M., Benitez-Nelson, C., Charmasson, S., Higley, K., Maderich, V., Masque, P., Oughton, D. and Smith, J.N. 2017. Fukushima Daiichi-derived radionucleidos in the ocean: transporte, fate, and impacts. Annu. Rev. Mar. Sci. 9: In press. doi: 10.1146 / annurev-marine-010816 a 060733

http://www.annualreviews.org/doi/abs/10.1146/annurev-marine-010816-060733

 

 

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