Re-Examining Tropical Expansion

TitleRe-Examining Tropical Expansion
Publication TypeJournal Article
Year of Publication2018
AuthorsStaten, Paul W., Lu Jian, Grise Kevin M., Davis Sean M., and Birner Thomas
JournalNature Climate Change
Volume8
Number9
Pages768-775
Date Published10/2018
Abstract / Summary

decades, implying a potential role of human activity. However, although theory and modelling suggest increasing GHG concentrations should widen the tropics, previous observational-based studies depict disparate rates of expansion, including many that are far higher than those simulated by climate models. Here, we review the rates and possible causes of observed and projected tropical widening. By accounting for methodological differences, the tropics are found to have widened about 0.5° of latitude per decade since 1979. However, it is too early to detect robust anthropogenically induced widening imprints due to large internal variability. Future work should target the seasonal and regional signatures of forced widening, as well as the associated dynamical mechanisms.

URLhttp://dx.doi.org/10.1038/s41558-018-0246-2
DOI10.1038/s41558-018-0246-2
Journal: Nature Climate Change
Year of Publication: 2018
Volume: 8
Number: 9
Pages: 768-775
Date Published: 10/2018

decades, implying a potential role of human activity. However, although theory and modelling suggest increasing GHG concentrations should widen the tropics, previous observational-based studies depict disparate rates of expansion, including many that are far higher than those simulated by climate models. Here, we review the rates and possible causes of observed and projected tropical widening. By accounting for methodological differences, the tropics are found to have widened about 0.5° of latitude per decade since 1979. However, it is too early to detect robust anthropogenically induced widening imprints due to large internal variability. Future work should target the seasonal and regional signatures of forced widening, as well as the associated dynamical mechanisms.

DOI: 10.1038/s41558-018-0246-2
Citation:
Staten, PW, J Lu, KM Grise, SM Davis, and T Birner.  2018.  "Re-Examining Tropical Expansion."  Nature Climate Change 8(9): 768-775.  https://doi.org/10.1038/s41558-018-0246-2.