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Quantifying Stratospheric Temperature Signals and Climate Imprints From Post-2000 Volcanic Eruptions
Matthias Stocker1, Florian Ladstädter1,2, Hallgeir Wilhelmsen1,3
1Wegener Center for Climate and Global Change (WEGC) University of Graz Graz Austria.
Geophysical Research Letters
|December 21, 2019
Summary
Small volcanic eruptions significantly impact stratospheric temperature, contributing up to 20% to temperature trends. Understanding these volcanic impacts is crucial for accurate climate change analysis.
Area of Science:
- Atmospheric Science
- Climate Science
- Volcanology
Background:
- Stratospheric temperature is influenced by volcanic eruptions.
- The impact of smaller eruptions is difficult to quantify due to natural variability.
- Recent research focuses on understanding the effects of small volcanic events.
Purpose of the Study:
- To quantify the temperature signals from small volcanic eruptions (2002-2016).
- To analyze the spatial and temporal characteristics of these volcanic impacts.
- To assess the contribution of volcanic activity to stratospheric temperature trends.
Main Methods:
- Utilized vertically resolved aerosol data.
- Employed precise temperature observations from radio occultation.
- Analyzed data from 2002 to 2016.
Main Results:
- Identified characteristic space-time temperature signals linked to specific eruptions.
- Observed significant warming in the lower stratosphere.
- Detected cooling signals in the mid-stratosphere for some eruptions.
- Determined volcanic contribution to temperature trends up to 20% based on latitude and altitude.
Conclusions:
- Detailed knowledge of the vertical structure of volcanic temperature impacts is essential.
- Accurate trend analysis requires separating natural variability from anthropogenic changes.
- Small volcanic eruptions play a notable role in stratospheric temperature dynamics.
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