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Tag: Carbon dioxide

CO2 concentration in the atmosphere (1959-1998)
CO2 concentrations in the atmosphere have been measured at an altitude of about 4,000 meters on the peak of Mauna Loa mountain in Hawaii since 1958. The measurements at this location, remote from local sources of polluti...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Temperature and CO2 concentration in the atmosphere over the past 400 000 years
Over the last 400,000 years the Earth's climate has been unstable, with very significant temperature changes, going from a warm climate to an ice age in as rapidly as a few decades. These rapid changes suggest that clima...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Emissions of carbon dioxide, in Africa and selected OECD countries
Africa represents only a small fraction, 3.6%, out of the total carbon dioxide (CO2) emissions per year, yet 14% of the population of the world lives here. The emissions per inhabitant in Libya, the Seychelles and South ...
02 Nov 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
Past and future CO2 concentrations
Since pre-industrial times, the atmospheric concentration of greenhouse gases has grown significantly. Carbon dioxide (CO2) concentration has increased by about 31%, methane concentration by about 150%, and nitrous oxide...
17 May 2005 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Kyoto protocol, timeline and history
The Kyoto Protocol In 1997 world leaders adopted the Kyoto Protocol requiring rich countries to reduce their greenhouse gas emissions to 5.2% below the 1990 level, calculated as an average over the period 2008-2012. Unde...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Carbon cycle
Carbon is the basis of all organic substances, from fossil fuels to human cells. On Earth, carbon is continually on the move – cycling through living things, the land, ocean, atmosphere. What happens when humans start dr...
17 May 2005 - by UNEP/GRID-Arendal
Temperature and CO2 concentration in the atmosphere over the past 400 000 years
Over the last 400,000 years the Earth's climate has been unstable, with very significant temperature changes, going from a warm climate to an ice age in as rapidly as a few decades. These rapid changes suggest that clima...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Main greenhouse gases
A table of the main greenhouse gases and their attributes, sources and concentration levels from 1998. Naturally occurring greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, and ozone. Greenh...
17 May 2005 - by UNEP/GRID-Arendal
National carbon dioxide (CO2) emissions per capita
Shows various countries and their levels of CO2 emissions per capita. Also indicates the difference from high income to low income nations on CO2 output. Central to any study of climate change is the development of an e...
17 May 2005 - by UNEP/GRID-Arendal
CO2 concentration in the atmosphere (1959-1998)
CO2 concentrations in the atmosphere have been measured at an altitude of about 4,000 meters on the peak of Mauna Loa mountain in Hawaii since 1958. The measurements at this location, remote from local sources of polluti...
12 Feb 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Human influences on the atmosphere during the industrial era
In many of the world’s largest cities (Beijing, Calcutta, Mexico City, Rio de Janeiro, etc.) WHO World Health Organization) air quality guidelines are not met. In 1996 global emissions of carbon dioxide were nearly four ...
29 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Total carbon market value per year
The total value of the carbon market for 2003 topped $300 million. And, depending on international regulation, some observers project that it will increase to $10–40 billion by 2010. Markets are also being created for mo...
01 Oct 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Characteristic time and space scales related to ecosystems and their services
The time scale of change refers to the time required for the effects of a perturbation of a process to be expressed. Inertia refers to the delay or slowness in the response of a system to factors altering their rate of c...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Greenhouse gas (GHG) emissions by source, 2004
Overall, agriculture (cropping and livestock) contributes 13.5 % of global greenhouse gas emissions mostly through emissions of methane and nitrous oxide (about 47% and 58% of total anthropogenic emissions of CH4 and N2O...
03 Jan 2008 - by IAASTD/Ketill Berger, UNEP/GRID-Arendal
Projected impact of climate change
Future climate change and projected impacts: Increased growth and yield rates due to higher levels of carbon dioxide and temperatures could result in longer growing seasons. For example, in mid to high latitude regions, ...
03 Jan 2008 - by IAASTD/Ketill Berger, UNEP/GRID-Arendal
Historical trends in carbon dioxide concentrations and temperature
The more recent history, from the middle ages and up until now, show increasing temperatures, rising as the world emerged from the Little Ice Age (LIA), around 1850. With the industrial era, human activities have at the ...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Carbon cycle
Living systems play a vital role in the carbon cycle. Photosynthesising organisms – mostly plants on land and various kinds of algae and bacteria in the sea – use either atmospheric carbon dioxide or that dissolved in se...
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
The vicious cycle of depletion
Agricultural systems in the temperate zone tend to occupy fertile soils that would have formerly supported temperate grassland or forest. Land clearance for croplands and pasture has greatly reduced above ground carbo...
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Uptake of Carbon Dioxide from the Atmosphere
Atmosphere-ocean exchanges of carbon.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Global emissions of carbon dioxide, 2006
The region of Latin America and the Caribbean is highly vulnerable to climate change despite the fact that it contributes relatively little to global greenhouse gas emissions. Thus, global carbon dioxide (CO2) emissions ...
22 Nov 2010 - by Nieves López Izquierdo, Associate Consultant UNEP/GRID-Arendal
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