TY - JOUR
T1 - The universal scaling characteristics of tropical oceanic rain clusters
AU - Teo, C. K.
AU - Huynh, H. N.
AU - Koh, T. Y.
AU - Cheung, K. K. W.
AU - Legras, B.
AU - Chew, L. Y.
AU - Norford, L.
PY - 2017/6/16
Y1 - 2017/6/16
N2 - Using multiyear satellite rainfall estimates, the distributions of the area, and the total rain rate of rain clusters over the equatorial Indian, Pacific, and Atlantic Oceans was found to exhibit a power law fS(s)~s-ζS , (Formula presented.), in which S represents either the cluster area or the cluster total rain rate and fS(s) denotes the probability density function of finding an event of size s. The scaling exponents ζS were estimated to be 1.66 ± 0.06 and 1.48 ± 0.13 for the cluster area and cluster total rain rate, respectively. The two exponents were further found to be related via the expected total rain rate given a cluster area. These results suggest that convection over the tropical oceans is organized into rain clusters with universal scaling properties. They are also related through a simple scaling relation consistent with classical self-organized critical phenomena. The results from this study suggest that mesoscale rain clusters tend to grow by increasing in size and intensity, while larger clusters tend to grow by self-organizing without intensification.
AB - Using multiyear satellite rainfall estimates, the distributions of the area, and the total rain rate of rain clusters over the equatorial Indian, Pacific, and Atlantic Oceans was found to exhibit a power law fS(s)~s-ζS , (Formula presented.), in which S represents either the cluster area or the cluster total rain rate and fS(s) denotes the probability density function of finding an event of size s. The scaling exponents ζS were estimated to be 1.66 ± 0.06 and 1.48 ± 0.13 for the cluster area and cluster total rain rate, respectively. The two exponents were further found to be related via the expected total rain rate given a cluster area. These results suggest that convection over the tropical oceans is organized into rain clusters with universal scaling properties. They are also related through a simple scaling relation consistent with classical self-organized critical phenomena. The results from this study suggest that mesoscale rain clusters tend to grow by increasing in size and intensity, while larger clusters tend to grow by self-organizing without intensification.
UR - http://www.scopus.com/inward/record.url?scp=85020174658&partnerID=8YFLogxK
U2 - 10.1002/2016JD025921
DO - 10.1002/2016JD025921
M3 - Article
AN - SCOPUS:85020174658
SN - 2169-897X
VL - 122
SP - 5582
EP - 5599
JO - Journal of geophysical research: Atmospheres
JF - Journal of geophysical research: Atmospheres
IS - 11
ER -