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Controls on the width of tropical precipitation and its contraction under global warming

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Controls on the width of tropical precipitation and its contraction under global warming. / Donohoe, A.; Atwood, A.R.; Byrne, M.P.

In: Geophysical Research Letters, Vol. Early View, 29.08.2019.

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Donohoe, A, Atwood, AR & Byrne, MP 2019, 'Controls on the width of tropical precipitation and its contraction under global warming', Geophysical Research Letters, vol. Early View. https://doi.org/10.1029/2019GL082969

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Donohoe, A., Atwood, A. R., & Byrne, M. P. (2019). Controls on the width of tropical precipitation and its contraction under global warming. Geophysical Research Letters, Early View. https://doi.org/10.1029/2019GL082969

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Donohoe A, Atwood AR, Byrne MP. Controls on the width of tropical precipitation and its contraction under global warming. Geophysical Research Letters. 2019 Aug 29;Early View. https://doi.org/10.1029/2019GL082969

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Donohoe, A. ; Atwood, A.R. ; Byrne, M.P. / Controls on the width of tropical precipitation and its contraction under global warming. In: Geophysical Research Letters. 2019 ; Vol. Early View.

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@article{8b5062012d1b4229a5817e1ec2dabf41,
title = "Controls on the width of tropical precipitation and its contraction under global warming",
abstract = "Climate models robustly and unanimously simulate narrowing of the intense tropical precipitation under greenhouse gas forcing. We argue that the meridional width of tropical precipitation is controlled by the seasonal meridional range of the intertropical convergence zone (ITCZ). The contraction of tropical precipitation under greenhouse forcing results from a reduced seasonal range of ITCZ migration. An energetic theory -- similar to the energetic theory for ITCZ shifts based on the hemispheric contrast of energy input to the atmosphere-- is developed. The meridional width of tropical precipitation is proportional to the seasonal range of the inter-hemispheric contrast in atmospheric heating divided by the efficiency of atmospheric cross-equatorial heat transport. Climate models are biased toward overly expansive tropical precipitation resulting from an exaggerated seasonal atmospheric heating. The robust contraction of tropical precipitation under global warming results from increased efficiency of inter-hemispheric energy transport consistent with enhanced gross moist stability of the tropical atmosphere.",
author = "A. Donohoe and A.R. Atwood and M.P. Byrne",
note = "AD and ARA were funded by the National Science Foundation Paleo Perspective on Climate Change (P2C2) Grant number AGS-1702827.",
year = "2019",
month = aug,
day = "29",
doi = "10.1029/2019GL082969",
language = "English",
volume = "Early View",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "John Wiley & Sons, Ltd.",

}

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TY - JOUR

T1 - Controls on the width of tropical precipitation and its contraction under global warming

AU - Donohoe, A.

AU - Atwood, A.R.

AU - Byrne, M.P.

N1 - AD and ARA were funded by the National Science Foundation Paleo Perspective on Climate Change (P2C2) Grant number AGS-1702827.

PY - 2019/8/29

Y1 - 2019/8/29

N2 - Climate models robustly and unanimously simulate narrowing of the intense tropical precipitation under greenhouse gas forcing. We argue that the meridional width of tropical precipitation is controlled by the seasonal meridional range of the intertropical convergence zone (ITCZ). The contraction of tropical precipitation under greenhouse forcing results from a reduced seasonal range of ITCZ migration. An energetic theory -- similar to the energetic theory for ITCZ shifts based on the hemispheric contrast of energy input to the atmosphere-- is developed. The meridional width of tropical precipitation is proportional to the seasonal range of the inter-hemispheric contrast in atmospheric heating divided by the efficiency of atmospheric cross-equatorial heat transport. Climate models are biased toward overly expansive tropical precipitation resulting from an exaggerated seasonal atmospheric heating. The robust contraction of tropical precipitation under global warming results from increased efficiency of inter-hemispheric energy transport consistent with enhanced gross moist stability of the tropical atmosphere.

AB - Climate models robustly and unanimously simulate narrowing of the intense tropical precipitation under greenhouse gas forcing. We argue that the meridional width of tropical precipitation is controlled by the seasonal meridional range of the intertropical convergence zone (ITCZ). The contraction of tropical precipitation under greenhouse forcing results from a reduced seasonal range of ITCZ migration. An energetic theory -- similar to the energetic theory for ITCZ shifts based on the hemispheric contrast of energy input to the atmosphere-- is developed. The meridional width of tropical precipitation is proportional to the seasonal range of the inter-hemispheric contrast in atmospheric heating divided by the efficiency of atmospheric cross-equatorial heat transport. Climate models are biased toward overly expansive tropical precipitation resulting from an exaggerated seasonal atmospheric heating. The robust contraction of tropical precipitation under global warming results from increased efficiency of inter-hemispheric energy transport consistent with enhanced gross moist stability of the tropical atmosphere.

UR - https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL082969#support-information-section

U2 - 10.1029/2019GL082969

DO - 10.1029/2019GL082969

M3 - Article

VL - Early View

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

ER -

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