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@ARTICLE{Luo:20623,
author = {Luo, Z.J. and Kley, D. and Johnson, R.H. and Liu, G.Y. and
Nawrath, S. and Smit, H.G.J.},
title = {{I}nfluence of {S}ea {S}urface {T}emperature on {H}umidity
and {T}emperature in the {O}utflow of {T}ropical {D}eep
{C}onvection},
journal = {Journal of climate},
volume = {25},
issn = {0894-8755},
address = {Boston, Mass. [u.a.]},
publisher = {AMS},
reportid = {PreJuSER-20623},
pages = {1340-1348},
year = {2012},
note = {This work was partially supported by the National Science
Foundation (NSF) under Grant ATM-0444244 and
Forschungszentrum Julich, and partially supported by NOAA
Grant NA10NES4400004, which was awarded to City College of
New York, and NASA MAP Grant NNX09AJ46G, which was awarded
to the University of Michigan. We thank Gert Konig-Langlo
from the Alfred Wegener Institute for supplying R/V
Polarstern data. The lead author wishes to thank Dr.
Xianglei Huang of the University of Michigan for his helpful
discussion.},
abstract = {Multiple years of measurements of tropical
upper-tropospheric temperature and humidity by the
Measurement of Ozone and Water Vapor by Airbus In-Service
Aircraft (MOZAIC) project are analyzed in the vicinity of
deep convective outflow to study the variations of
temperature and humidity and to investigate the influence of
the sea surface temperature (SST) on the outflow air
properties. The principal findings are the following. 1) The
distribution of relative humidity with respect to ice (RHi)
depends on where a convective system is sampled by the
MOZAIC aircraft: deep inside the system, RHi is unimodal
with the mode at similar to $114\%;$ near the outskirts of
the system, bimodal distribution of RHi starts to emerge
with a dry mode at around $40\%$ and a moist mode at
$100\%.$ The results are compared with previous studies
using in situ measurements and model simulations. It is
suggested that the difference in the RHi distribution can be
explained by the variation of vertical motions associated
with a convective system. 2) Analysis of MOZAIC data shows
that a fractional increase of specific humidity with SST,
q(-1) dq/dSTT, near the convective outflow is about
0.16-0.18 K-1. These values agree well with previous studies
using satellite data. Because MOZAIC measurements of
temperature and humidity are independent, the authors
further analyze the SST dependence of RHi and temperature
individually. Temperature increases with SST for both
prevalent flight levels (238 and 262 hPa); RHi stays close
to constant with respect to SST for 238 hPa but shows an
increasing trend for the 262-hPa level. Analysis conducted
in this study represents a unique observational basis
against which model simulations of upper-tropospheric
humidity and its connection to deep convection and SST can
be evaluated.},
keywords = {J (WoSType)},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK491},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000300418500018},
doi = {10.1175/2011JCLI4124.1},
url = {https://juser.fz-juelich.de/record/20623},
}