Editing IPCC:AR6/Data/Glossary (section)

== 1 ==

<div class="glossary-entry">
<div id="1.5°C_pathway"></div>
=== <span class="glossary-term">1.5°C pathway</span> ===

<div class="glossary-definition">'''Definition:''' A pathway of emissions of greenhouse gases and other climate forcers that provides an approximately one-in-two to two-in-three chance, given current knowledge of the climate response, of global warming either remaining below 1.5°C or returning to 1.5°C by around 2100 following an overshoot.</div>
</div>

<div class="glossary-entry">
<div id="1.5°C_warmer_worlds"></div>
=== <span class="glossary-term">1.5°C warmer worlds</span> ===

<div class="glossary-working-groups">'''Working Groups:''' WGI; WGIII</div>

<div class="glossary-definition">'''Definition:''' Projected worlds in which global warming has reached and, unless otherwise indicated, been limited to 1.5°C above pre-industrial levels. There is no single 1.5°C warmer world, and projections of 1.5°C warmer worlds look different depending on whether it is considered on a near-term transient trajectory or at climate equilibrium after several millennia, and, in both cases, if it occurs with or without overshoot. Within the 21st century, several aspects play a role for the assessment of risk and potential impacts in 1.5°C warmer worlds: the possible occurrence, magnitude and duration of an overshoot; the way in which emissions reductions are achieved; the ways in which policies might be able to influence the resilience of human and natural systems; and the nature of the regional and sub-regional risks. Beyond the 21st century, several elements of the climate system would continue to change even if the global mean temperatures remain stable, including further increases of sea level.</div>
</div>

<div class="glossary-entry">
<div id="13C"></div>
=== <span class="glossary-term">13C</span> ===

<div class="glossary-working-groups">'''Working Groups:''' WGI</div>

<div class="glossary-definition">'''Definition:''' Stable isotope of carbon having an atomic weight of approximately 13. Measurements of the ratio of 13C/12C in carbon dioxide (CO2) molecules are used to infer the importance of different carbon cycle and climate processes and the size of the terrestrial carbon reservoir.</div>
</div>

<div class="glossary-entry">
<div id="14C"></div>
=== <span class="glossary-term">14C</span> ===

<div class="glossary-working-groups">'''Working Groups:''' WGI</div>

<div class="glossary-definition">'''Definition:''' Unstable isotope of carbon having an atomic weight of approximately 14, and a half-life of about 5700 years. It is often used for dating purposes going back some 40 kyr. Its variation in time is affected by the magnetic fields of the Sun and Earth, which influence its production from cosmic rays (see Cosmogenic radioisotopes).</div>
</div>

</div>
<div class="glossary-letter-section">