Disentangling the effect of regional surface heat flux bias on the double-ITCZ problem ...
This study investigates the causes of the double intertropical convergence zone (ITCZ) bias by disentangling the individual contribution of regional surface heat flux biases. A previously suggested Southern Ocean warm bias effect in displacing the zonal-mean ITCZ southward is diminished by the south...
| Main Authors: | , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
Zenodo
2021
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5281/zenodo.5062467 https://zenodo.org/doi/10.5281/zenodo.5062467 |
| Summary: | This study investigates the causes of the double intertropical convergence zone (ITCZ) bias by disentangling the individual contribution of regional surface heat flux biases. A previously suggested Southern Ocean warm bias effect in displacing the zonal-mean ITCZ southward is diminished by the southern midlatitude cold bias effect. The northern extratropical cold bias turns out to be most responsible for a southward-displaced zonal-mean precipitation but the zonal-mean diagnostics poorly represents the longitudinal pattern of the tropical Pacific response. Examination of longitude-latitude structure indicates that the overall spatial pattern of tropical precipitation bias is largely shaped by the local surface heat flux bias. The southeastern tropical Pacific wet bias is driven by warm bias along the west coast of South America with negligible influence from the Southern Ocean warm bias. Our model experiments shed light on where the focus should be applied in model development to correct the certain features ... |
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