O
Data and Resources
-
O horizon
These are layers dominated by organic material consisting of undecomposed or...
-
Objectively verifiable indicator
Indicator which demonstrates in concrete terms the results achieved....
-
Ocean acidification
Term used to describe significant changes to the chemistry of the ocean. It...
-
Ocean eutrophication
a process driven by the enrichment of water by nutrients, especially...
-
Oceanography
The branch of science that deals with the physical and biological properties...
-
Ochric A horizon
The ochric horizon (from Gr. ochros, pale) is a surface horizon lacking fine...
-
Offset (in climate policy)
A unit of CO2e emissions that is reduced, avoided, or sequestered to...
-
Oligotrophic
Relatively unproductive areas of the sea, lakes, and rivers with low nutrient...
-
Ombric qualifier
Moor peat saturated predominantly with rainwater.
-
One health
A collaborative, multisectoral, and trans- disciplinary approach—working at...
-
Option value
Option Values (OV) are derived from the value given to safeguarding an asset...
-
Organic agriculture
A production system that sustains the health of soils, ecosystems and people....
-
Organic carbon (oc)
Organic carbon, as used in climate research, usually refers to the carbon...
-
Organic soil
Soil texture class characterized by the following features: vary in organic...
-
Organizations
Bodies of individuals with a specified common objective. Organizations could...
-
Organochlorine compounds
Any of a class of organic chemical compounds containing carbon, hydrogen and...
-
Ornithogenic material
From the Greek ornithos, bird, and genesis, origin. It is material with...
-
Other effective area-based conservation measures
A geographically defined area other than a Protected Area, which is governed...
-
Outmigration
the action of leaving one place to settle in another, especially within a...
-
Overexploitation
The excessive extraction of raw materials without considering the long- term...
-
Overfall
A structure for the overflow of water, when it reaches a certain level.
-
Overfishing
When more weight of fish are removed from a body of water in a single season...
-
Overgrazing
Excessive grazing (feeding of livestock) which causes damage to grassland.
-
Overshoot
The situation that occurs when humanity’s demand on the biosphere exceeds...
-
Overtopping
Water flowing from a water-reservoir when filled beyond its capacity.
-
Oxidant
An oxidizing agent.
-
Ozone layer
A region of the atmosphere situated at an altitude of 10–50 km above the...
-
Ozone-depleting potential
A relative index indicating the extent to which a chemical product may cause...
-
Ozone-depleting substances (ODSS)
Volatile organic compounds (VOC) are organic chemicals that when released...
Additional Info
| Field | Value |
|---|---|
| Source | https://wesr-staging.azurewebsites.net/glossary/ajax/ajax.searchbyindex.php?q=O |
| Author | UNEP GEO |
| Maintainer | UNEP GEO |
| Last Updated | January 26, 2023, 06:33 (UTC) |
| Created | September 13, 2022, 18:27 (UTC) |
| GUID | unep-geo-glossary-letter-o |
| Issued | 2022-08-31 15:15:21 |
| Language | en |
| Modified | 2022-11-09 17:41:18 |
| Publisher name | UNEP GEO |
| Theme | Glossary |
| data_type | webpage |
| spatial | Global |