Seasonal sensitivity of the Hadley cell and cross-hemispheric responses to diabatic heating in an idealized GCM
| Autor: | Tim Woollings, Cheikh Mbengue, Hugh S. Baker |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Atmospheric circulation Diabatic Storm GCM transcription factors Forcing (mathematics) 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences Latitude Geophysics General Earth and Planetary Sciences Environmental science Climate model Hadley cell 0105 earth and related environmental sciences |
| Popis: | The seasonal sensitivity of the Hadley cell to localized diabatic forcing is studied using a dry idealized atmospheric general circulation model. Sensitivities are broadly consistent with Hadley cell responses in observations and climate models to ENSO and global warming-like forcings. However, the exact seasonal sensitivity patterns highlight the importance of reducing the uncertainty in the size and position of expected anthropogenic forcings to understand how the atmospheric circulation will respond. The sensitivities reveal cross-hemispheric Hadley cell responses which project onto the eddy-driven jets and storm tracks. For summer hemisphere heating, the winter Hadley cell extent and jet latitude responses are highly correlated. For winter hemisphere heating, the summer Hadley cell extent and jet speed responses are highly correlated. These seasonal differences arise due to the contrast between the dominant winter Hadley cell and weaker summer Hadley cell. |
| Databáze: | OpenAIRE |
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