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Journal of Geophysical Research: Atmospheres

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Top figure shows tracking of mesoscale convective systems globally at hourly and 10-km resolution; bottom figure is a world map showing amount of rainfall that MCSs account for.
Posted inEditors' Highlights

New Global Mesoscale Convective System Tracking Database

by C. Zhang 6 May 20213 February 2022

A 20-year high-resolution global mesoscale convective system tracking database reveals the characteristics of mesoscale convective systems and their significant contributions to global rainfall.

上行闪电很罕见,但更常见的闪电类型可以增加上行闪电发生的可能性。
Posted inResearch Spotlights

附近闪电事件触发上行闪电

Elizabeth Thompson by Elizabeth Thompson 26 April 202113 April 2023

雷暴中的闪电以某种方式改变了电磁场,从而引发高层建筑物向上发出闪电。

Upward lightning is uncommon, but more common types of lightning can make it more likely to occur.
Posted inResearch Spotlights

Upward Lightning Takes Its Cue from Nearby Lightning Events

Elizabeth Thompson by Elizabeth Thompson 9 April 202117 August 2022

Lightning in a thunderstorm changes the electromagnetic field in a way that sparks upward lightning from tall structures.

The atmosphere above remote ocean regions plays an important role in the global methanol budget.
Posted inResearch Spotlights

Improving the Global Budget for Atmospheric Methanol

by David Shultz 25 March 20213 December 2021

New aircraft survey data show that although atmospheric chemistry above remote ocean regions is a considerable source of methanol production, the ocean’s net methanol emission is minor.

Cloud droplets in turbulence (left) and cloud droplets in Earth’s atmosphere (right)
Posted inResearch Spotlights

Atmospheric Turbulence May Promote Cloud Droplet Formation

by Morgan Rehnberg 18 March 20217 March 2022

Turbulence causes local variations in relative humidity, which can push particles past a critical saturation threshold for droplet nucleation.

Maps of the northern (left) and southern (right) hemispheres showing temperature anomalies relative to the 1961–1990 mean for the month of August 2016 using an alternative gridding method
Posted inEditors' Highlights

New Land Surface Air Temperature Global Dataset

by Minghua Zhang 17 March 202113 February 2023

The fifth major update of land surface air temperature data from the Climatic Research Unit and the Met Office has extended the time series, included more stations, and used better processing methods.

Two charts comparing annual global average temperature anomaly series relative to 1961–1990 (top) and 1850–1900 (bottom)
Posted inEditors' Highlights

New Global Surface Temperature Dataset Spans 170 Years

by Minghua Zhang 8 March 202113 February 2023

HadCRUT5, the new version of the Met Office Hadley Centre/Climatic Research Unit global surface temperature dataset from 1850 to 2018, has extended and improved the previous temperature record.

Aerial view of a wildfire smoke plume rising from a mountainous landscape
Posted inResearch Spotlights

Seeding Ice Clouds with Wildfire Emissions

by David Shultz 26 February 202110 January 2022

Wildfires create airborne plumes of organic and inorganic matter as they burn. These particles can nucleate cloud-forming ice crystals and affect cloud dynamics, precipitation, and climate.

Map of south and southeast Asia showing the near-surface origins of ‘fast’ airmass trajectories connecting the surface and the upper troposphere/lower stratosphere
Posted inEditors' Highlights

Measurements of Ozone-Depleting Chemicals in the Asian Monsoon

by William J. Randel 10 February 202119 September 2022

New high-altitude aircraft observations identify unexpected high levels of halogen-containing species entering the stratosphere above the summertime Asian monsoon.

Chart showing composition of reactive nitrogen species in wildfire smoke at different locations
Posted inEditors' Highlights

Deciphering Reactive Nitrogen Emissions from Wildfire Smoke

by B. McDonald 5 February 202119 September 2022

In-situ data gathered from an aircraft flying over 23 western US wildfires in 2018 reveal the importance of reduced nitrogen, shedding insights on ozone and aerosol formation from wildfires.

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