Dacie, Sally und Kluft, Lukas und Schmidt, Hauke und Stevens, Bjorn und Buehler, Stefan A und Nowack, Peer und Dietmüller, Simone und Abraham, N. Luke und Birner, Thomas (2019) A 1D RCE Study of Factors Affecting the Tropical Tropopause Layer and Surface Climate. Journal of Climate, 32, Seiten 6769-6782. American Meteorological Society. doi: 10.1175/JCLI-D-18-0778.1. ISSN 0894-8755.
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Offizielle URL: https://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-18-0778.1
Kurzfassung
There are discrepancies between global climate models regarding the evolution of the tropical tropopause layer (TTL) and also whether changes in ozone impact the surface under climate change. We use a 1D clear-sky radiative–convective equilibrium model to determine how a variety of factors can affect the TTL and how they influence surface climate. We develop a new method of convective adjustment, which relaxes the temperature profile toward the moist adiabat and allows for cooling above the level of neutral buoyancy. The TTL temperatures in our model are sensitive to CO2 concentration, ozone profile, the method of convective adjustment, and the upwelling velocity, which is used to calculate a dynamical cooling rate in the stratosphere. Moreover, the temperature response of the TTL to changes in each of the above factors sometimes depends on the others. The surface temperature response to changes in ozone and upwelling at and above the TTL is also strongly amplified by both stratospheric and tropospheric water vapor changes. With all these influencing factors, it is not surprising that global models disagree with regard to TTL structure and evolution and the influence of ozone changes on surface temperatures. On the other hand, the effect of doubling CO2 on the surface, including just radiative, water vapor, and lapse-rate feedbacks, is relatively robust to changes in convection, upwelling, or the applied ozone profile.
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||||||||||
Zusätzliche Informationen: | NB: AMS Copyright policy detailed under https://www.ametsoc.org/ams/index.cfm/publications/ethical-guidelines-and-ams-policies/ams-copyright-policy/ | ||||||||||||||||||||||||||||||||||||||||
Titel: | A 1D RCE Study of Factors Affecting the Tropical Tropopause Layer and Surface Climate | ||||||||||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 19 Juni 2019 | ||||||||||||||||||||||||||||||||||||||||
Erschienen in: | Journal of Climate | ||||||||||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||||||||||
Band: | 32 | ||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1175/JCLI-D-18-0778.1 | ||||||||||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 6769-6782 | ||||||||||||||||||||||||||||||||||||||||
Verlag: | American Meteorological Society | ||||||||||||||||||||||||||||||||||||||||
ISSN: | 0894-8755 | ||||||||||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||||||||||
Stichwörter: | Radiative-convective equilibrium; Tropopause; Climate sensitivity; Ozone; Single column models | ||||||||||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||||||||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Atmosphären- und Klimaforschung | ||||||||||||||||||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Physik der Atmosphäre > Erdsystem-Modellierung Institut für Physik der Atmosphäre | ||||||||||||||||||||||||||||||||||||||||
Hinterlegt von: | Dietmüller, Simone | ||||||||||||||||||||||||||||||||||||||||
Hinterlegt am: | 22 Okt 2019 12:35 | ||||||||||||||||||||||||||||||||||||||||
Letzte Änderung: | 22 Okt 2019 12:35 |
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