@Article{EsmailiTianVilaKim:2016:LaAnCo,
author = "Esmaili, Rebekah Bradley and Tian, Yudong and Vila, Daniel
Alejandro and Kim, Kyu-Myong",
affiliation = "{University of Maryland} and {University of Maryland} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {NASA
Goddard Space Flight Center}",
title = "A Lagrangian analysis of cold cloud clusters and their life cycles
with satellite observations",
journal = "Journal of Geophysical Research: Atmospheres",
year = "2016",
volume = "121",
number = "19",
pages = "11723--11738",
month = "Oct.",
keywords = "cloud cluster, evolution, Lagrangian, life cycle, tracking.",
abstract = "Cloud movement and evolution signify the complex water and energy
transport in the atmosphere-ocean-land system. Detecting,
clustering, and tracking clouds as semicoherent clusters enable
study of their evolution which can complement climate model
simulations and enhance satellite retrieval algorithms, where
there are gaps between overpasses. Using a cluster tracking
algorithm, in this study we examine the trajectories, size, and
brightness temperature of millions of cloud clusters over their
lifespan, from infrared satellite observations at 30 min, 4 km
resolution, for a period of 11 years. We found that the majority
of cold clouds were both small and short lived and that their
frequency and location are influenced by El Niņo. Also, this large
sample of individually tracked clouds shows their horizontal size
and temperature evolution. Long-lived clusters tended to achieve
their temperature and size maturity milestones at different times,
while these stages often occurred simultaneously in short-lived
clusters. On average, clusters with this lag also exhibited a
greater rainfall contribution than those where minimum temperature
and maximum size stages occurred simultaneously. Furthermore, by
examining the diurnal cycle of cluster development over Africa and
the Indian subcontinent, we observed differences in the local
timing of the maximum occurrence at different life cycle stages.
Over land there was a strong diurnal peak in the afternoon, while
over the ocean there was a semidiurnal peak composed of
longer-lived clusters in the early morning hours and shorter-lived
clusters in the afternoon. Building on regional specific work,
this study provides a global long-term survey of object-based
cloud characteristics.",
doi = "10.1002/2016JD025653",
url = "http://dx.doi.org/10.1002/2016JD025653",
issn = "2169-8996 and 2169-897X",
language = "en",
targetfile = "esmaili_lagrangian.pdf",
urlaccessdate = "28 abr. 2024"
}