What question did this study set out to answer?

To examine the sensitivity of tropical surface temperatures and the regional energy balance to glacial forcing during the Last Glacial Maximum.

March 1, 2000Journal of ClimateOpen Access

Tropical Cooling at the Last Glacial Maximum: An Atmosphere–Mixed Layer Ocean Model Simulation

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To examine the sensitivity of tropical surface temperatures and the regional energy balance to glacial forcing during the Last Glacial Maximum.
Simulated Last Glacial Maximum conditions using an atmosphere–mixed layer ocean (A-MLO) model following Paleoclimate Modeling Intercomparison Project specifications.
Imposed radiative perturbations derived from changes in continental ice sheets, orbital parameters, atmospheric carbon dioxide, and sea level.
Glacial perturbations produced a global mean radiative forcing of 4.20 W m^-2, driven predominantly by comparable contributions from continental ice and reduced carbon dioxide.
Global mean surface air temperature dropped by 4.0 K, with average tropical cooling (30°N to 30°S) reaching 2.0 K alongside substantial spatial variability.
Tropical energy balance was maintained as decreased top-of-atmosphere longwave emissions were balanced by enhanced cloud shortwave reflection and increased poleward atmospheric heat transport.

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Implication

Climate model simulation reveals a 2.0 K tropical cooling during the Last Glacial Maximum, highlighting cloud reflection and atmospheric heat transport as key balancing mechanisms.

Cite This Study

Anthony J. Broccoli (2000) studied this question.

synapsesocial.com/papers/6a1ead816b4935698da42e59 https://doi.org/10.1175/1520-0442(2000)013<0951:tcatlg>2.0.co;2

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Implication

Climate model simulation reveals a 2.0 K tropical cooling during the Last Glacial Maximum, highlighting cloud reflection and atmospheric heat transport as key balancing mechanisms.

Tropical Cooling at the Last Glacial Maximum: An Atmosphere–Mixed Layer Ocean Model Simulation

Key Points

Discussion

Implication

Cite This Study

Tropical Cooling at the Last Glacial Maximum: An Atmosphere–Mixed Layer Ocean Model Simulation

Key Points

Discussion

Implication

Cite This Study

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