Glossary | Climate Lexicon

carbon-connect AG Climate Glossary with common technical terms, abbreviations and explanations on the topics of the environment, climate protection and CO2 compensation.

Abrupt Climate Change

An abrupt climate change or “climate jump” describes the rapid climate change to a new climate state. This has a serious impact on our habitats because ecosystems have to adapt to the new conditions over a short period of time. Such a “climate jump” occurs when a climate change occurs too quickly and unexpectedly. The last abrupt climate change took place during the Younger Dryas (Knud Jessen). Climate Jumps can occur within decades or even years.

Acidification of our Seas and Oceans

A sinking pH value in our seawater indicates an increasing acidification of our oceans. This sinking pH value is caused by the absorption of carbon dioxide (CO2) from the atmosphere in oceans. In addition to global warming, this is the main consequence of the human-induced emission of carbon dioxide (CO2). The acidification of oceans affects lifeforms such as fish, corals, plankton and mussels.


A Regional Development Program (ADP) is a program that takes place and is implemented in a specific area.

Agricultural fuel

A liquid fuel made from organic or combustible oils. The basis is living or recently decayed plants.


Includes the group of countries listed in Annex B of the Kyoto Protocol, which have agreed on a common goal for their greenhouse gas emissions. Included are all Annex I countries, except for Turkey and Belarus.


Under the Kyoto Protocol, all Annex I countries listed in Annex I (Appendix I) have committed themselves to reduce their greenhouse gas emissions by 5.1% under the levels of the year 1990 by 2020. The term Annex-I-States is also used as a synonym for all industrialized countries and includes all OECD countries (except South Korea and Mexico), it also includes all Eastern European countries (except the Balkan states).


Includes the group of countries listed in Annex II (Appendix 2) of the United Nations Framework Convention on Climate Change, and includes all OECD countries of the year 1990. Annex II states are expected to provide financial support to assist developing countries in fulfilling their obligations.

Antarctic ice sheet

The Greenland Ice Sheet and the Antarctic Ice Sheet are the two remaining ice sheets on the planet. 70% of the world's freshwater resources are in the Antarctic. In case of a complete melting of the Antarctic, the sea level would increase by 56 meters.


This means caused by humans or produced by humans.

Arid Area

An arid area is a low precipitation area. Low is defined as less than 250 mm of precipitation per year.