WMO Bulletin Vol. 75 (1): The Air Issue

Mountain landscape with a winding road leading to buildings at the base, surrounded by rocky hills, snow patches, and distant snow-capped peaks under a cloudy sky.
Wara Eliana Carvajal Terrazas

Discover how advances in atmospheric science are helping to improve air quality, strengthen early warnings and deepen our understanding of the atmosphere. This issue features expert analysis, case studies and interviews exploring ozone, greenhouse gases, wildfire smoke, sand and dust storms and more.

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Featured in this issue

A woman in a white blazer stands in front of two blue flags featuring the United Nations emblem.
WMO Bulletin
The Air We Breathe
19 June 2026
The atmosphere knows no borders. In her opening message, WMO Secretary-General Celeste Saulo reflects on how scientific cooperation and sustained observations help us better understand the atmosphere and prepare for the challenges it brings.
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A remote mountainous landscape with winding dirt roads, a cluster of white buildings in the foreground, and rugged, rocky hills and small turquoise lakes in the background.
WMO Bulletin
Life in a Global Atmospheric Watch Station: Watching the Air from the Top of the Andes
19 June 2026
High in the Bolivian Andes, the Chacaltaya Observatory offers a unique window into the atmosphere. Meet the people whose dedication keeps its observations flowing year-round.
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A woman with straight brown hair wearing a light blue shirt sits in front of a white wall with a framed artwork featuring several illustrations.
WMO Bulletin
“The Atmosphere Is Not Waiting to See Who Has Observations”
19 June 2026
From launching ozone balloons over the Andes to building Ecuador's atmospheric monitoring capacity from scratch, Prof. Dr María del Carmen Cazorla explains why long-term observations remain essential to understanding the atmosphere.
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: Close-up of an atmospheric monitoring instrument at sunset, with the sun visible through its transparent dome.
WMO Bulletin
19 June 2026

Expanding the Watch: How WMO is Supporting the Montreal Protocol's Next Chapter
A large wildfire burns through a forested area, producing thick plumes of smoke and visible flames, as seen from an aerial or satellite perspective.
WMO Bulletin
19 June 2026

The Long Shadow of Wildfires: Smoke, Air Quality and Health
Industrial facility with multiple smokestacks emitting large plumes of smoke above a forested area under a clear sky.
WMO Bulletin
19 June 2026

Greenhouse Gas Monitoring at the World Meteorological Organization: From Science to Services
Satellite view of Earth showing a large Saharan dust plume moving westward from Africa over the Atlantic Ocean toward the Americas, dated June 18, 2020.
WMO Bulletin
19 June 2026

Ahead of the Storm: Tracking Sand and Dust Across Borders
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Last updated: 3 August 2026