AbstractWe explore the question “what determines the meridional energy transport (MHT)?” by performing a series of rotation-rate experiments with an aquaplanet GCM coupled to a slab ocean. The change of MHT with rotation rate (Ω) falls into two regimes: in a “slow-rotating” regime (Ω < 1/2 modern rotation), MHT decreases with increasing Ω; in a “fast-rotating” regime (Ω ≥ 1/2 modern rotation), MHT is nearly invariant. The two-regime feature of MHT is primarily related to the reduction in tropical clouds and increase in tropical temperature that are associated with the narrowing and weakening of the Hadley Cell with increasing Ω. In the slow-rotating regime, the Hadley Cell contracts and weakens as Ω is increased; the resulting warming causes a local increase in outgoing longwave radiation (OLR) which consequently decreases MHT. In the fast-rotating regime, the Hadley Cell continues to contract as Ω is increased, resulting in a decrease in tropical and subtropical clouds which increases the local absorbed shortwave radiation (ASR) by an amount that almost exactly compensates the local increases in OLR. In the fast-rotating regime, the model heat transport is approximately diffusive, with an effective eddy diffusivity that is consistent with eddy mixing-length theory. The effective eddy diffusivity decreases with increasing Ω. However, this decrease is nearly offset by a strong increase in the meridional gradient of moist static energy and hence results in a near-constancy of MHT. Our results extend previous work on the MHT by highlighting that the spatial patterns of clouds and the factors that influence them are leading controls on MHT.
Journal of Climate – American Meteorological Society
Published: Jun 27, 2017
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera