Understanding and quantifying the global methane (CH 4) budget is important for assessing
realistic pathways to mitigate climate change. Atmospheric emissions and concentrations of …

The extratropical upper troposphere and lower stratosphere (Ex‐UTLS) is a transition region
between the stratosphere and the troposphere. The Ex‐UTLS includes the tropopause, a …

Persistent contrails and contrail cirrus are responsible for a large part of aviation induced
radiative forcing. A considerable fraction of their warming effect could be eliminated by …

CHAPTER 1 Page 1 CHAPTER 1 Ozone-Depleting Substances (ODSs) and Related
Chemicals Coordinating Lead Authors: Contributors: SA Montzka E. Atlas S. Reimann P …

A vertically high resolved climatology of the thermal and wind structure of the extratropical
tropopause region is presented. The climatology is based on data from 80 US radiosonde …

Age of stratospheric air is a well established metric for the stratospheric transport circulation.
Rooted in a robust theoretical framework, this approach offers the benefit of being deducible …

Transport into the extratropical lowermost stratosphere (LMS) can be divided into a slow part
(time-scale of several months to years) associated with the global-scale stratospheric …

An overview is provided of the current understanding of transport in the middle atmosphere.
Over the past quarter century this subject has evolved from a basic recognition of the Brewer …

In this paper we present evidence that the observed increase in tropical upwelling after the
year 2000 may be attributed to a change in the Brewer-Dobson circulation pattern. For this …

The Total Carbon Column Observing Network (TCCON) is a ground-based network of
Fourier Transform Spectrometer (FTS) sites around the globe, where the column …