Air-sea interaction in the tropical Atlantic

Anna-Lena Deppenmeier

Research output: Thesisinternal PhD, WU

Abstract

Sea surface temperatures (SST) in the tropical Atlantic ocean influence weather and climate patterns on the bordering continents and beyond. SST patterns are related to the West African Monsoon, and rainfall and drought over South America. Accurate simulation of oceanic processes with state-of-the-art coupled general circulation models (CGCMs) could enable prediction of societally relevant events, such as drought seasons. However, CGCMs are limited by long-standing biases in the tropical Atlantic, specifically by excessively warm SST in the south-east. In this thesis we investigate sources of variability in the tropical Atlantic, and how their representation in CGCMs lead to biases. We investigate basin wide air-sea interaction pathways as well as local mechanism, which contribute to the build-up of warm SST biases. Our results point to the importance of correct parameterisation of upper ocean vertical mixing for accurate climate model simulations.

Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Wageningen University
Supervisors/Advisors
  • Hazeleger, Wilco, Promotor
  • Haarsma, R.J., Co-promotor, External person
Award date8 Nov 2019
Place of PublicationWageningen
Publisher
Print ISBNs9789463950497
DOIs
Publication statusPublished - 2019

Fingerprint

air-sea interaction
sea surface temperature
general circulation model
drought
upper ocean
vertical mixing
simulation
climate modeling
parameterization
monsoon
weather
rainfall
climate
ocean
prediction
basin

Cite this

Deppenmeier, A-L. (2019). Air-sea interaction in the tropical Atlantic. Wageningen: Wageningen University. https://doi.org/10.18174/496766
Deppenmeier, Anna-Lena. / Air-sea interaction in the tropical Atlantic. Wageningen : Wageningen University, 2019. 136 p.
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title = "Air-sea interaction in the tropical Atlantic",
abstract = "Sea surface temperatures (SST) in the tropical Atlantic ocean influence weather and climate patterns on the bordering continents and beyond. SST patterns are related to the West African Monsoon, and rainfall and drought over South America. Accurate simulation of oceanic processes with state-of-the-art coupled general circulation models (CGCMs) could enable prediction of societally relevant events, such as drought seasons. However, CGCMs are limited by long-standing biases in the tropical Atlantic, specifically by excessively warm SST in the south-east. In this thesis we investigate sources of variability in the tropical Atlantic, and how their representation in CGCMs lead to biases. We investigate basin wide air-sea interaction pathways as well as local mechanism, which contribute to the build-up of warm SST biases. Our results point to the importance of correct parameterisation of upper ocean vertical mixing for accurate climate model simulations.",
author = "Anna-Lena Deppenmeier",
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Deppenmeier, A-L 2019, 'Air-sea interaction in the tropical Atlantic', Doctor of Philosophy, Wageningen University, Wageningen. https://doi.org/10.18174/496766

Air-sea interaction in the tropical Atlantic. / Deppenmeier, Anna-Lena.

Wageningen : Wageningen University, 2019. 136 p.

Research output: Thesisinternal PhD, WU

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T1 - Air-sea interaction in the tropical Atlantic

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N1 - WU thesis 7367 Includes bibliographical references. - With summary in English

PY - 2019

Y1 - 2019

N2 - Sea surface temperatures (SST) in the tropical Atlantic ocean influence weather and climate patterns on the bordering continents and beyond. SST patterns are related to the West African Monsoon, and rainfall and drought over South America. Accurate simulation of oceanic processes with state-of-the-art coupled general circulation models (CGCMs) could enable prediction of societally relevant events, such as drought seasons. However, CGCMs are limited by long-standing biases in the tropical Atlantic, specifically by excessively warm SST in the south-east. In this thesis we investigate sources of variability in the tropical Atlantic, and how their representation in CGCMs lead to biases. We investigate basin wide air-sea interaction pathways as well as local mechanism, which contribute to the build-up of warm SST biases. Our results point to the importance of correct parameterisation of upper ocean vertical mixing for accurate climate model simulations.

AB - Sea surface temperatures (SST) in the tropical Atlantic ocean influence weather and climate patterns on the bordering continents and beyond. SST patterns are related to the West African Monsoon, and rainfall and drought over South America. Accurate simulation of oceanic processes with state-of-the-art coupled general circulation models (CGCMs) could enable prediction of societally relevant events, such as drought seasons. However, CGCMs are limited by long-standing biases in the tropical Atlantic, specifically by excessively warm SST in the south-east. In this thesis we investigate sources of variability in the tropical Atlantic, and how their representation in CGCMs lead to biases. We investigate basin wide air-sea interaction pathways as well as local mechanism, which contribute to the build-up of warm SST biases. Our results point to the importance of correct parameterisation of upper ocean vertical mixing for accurate climate model simulations.

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Deppenmeier A-L. Air-sea interaction in the tropical Atlantic. Wageningen: Wageningen University, 2019. 136 p. https://doi.org/10.18174/496766