@Article{SapucciMachSouzCamp:2019:PoApNo,
author = "Sapucci, Luiz Fernando and Machado, Luiz Augusto Toledo and Souza,
Eniuce Menezes de and Campos, Thamiris Brand{\~a}o",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade Estadual
de Maring{\'a} (UEM)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Global Positioning System precipitable water vapour (GPS-PWV)
jumps before intense rain events: A potential application to
nowcasting",
journal = "Meteorological Applications",
year = "2019",
volume = "26",
number = "1",
pages = "49--63",
month = "Jan.",
keywords = "nowcasting, PWV-GPS, PWV jumps, severe precipitation.",
abstract = "A rapid increase in atmospheric water vapour is a fundamental
ingredient for many intense rainfall events.
High\‐frequency precipitable water vapour (PWV) estimates
(1 min) from a Global Positioning System (GPS) meteorological site
are evaluated in this paper for intense rainfall events during the
CHUVA Vale field campaign in Brazil (November and December 2011)
in which precipitation events of differing intensities and spatial
dimensions, as observed by an X\‐band radar, were explored.
A sharp increase in the GPS\‐PWV before the more intense
events was found and termed GPS\‐PWV jumps. These jumps are
probably associated with water vapour convergence and the
continued formation of cloud condensate and precipitation
particles. A wavelet correlation analysis between the high
temporal\‐resolution GPS\‐PWV time series and
rainfall events evaluated in this study shows that there are
oscillations in the PWV time series correlated with the more
intense rainfall events. These oscillations are on scales related
to periods from about 32 to 64\ min (associated with
GPS\‐PWV jumps) and from 16 to 34\ min (associated
with positive pulses of the PWV). The GPS\‐PWV
time\‐derivative histogram for the time window before the
rainfall event reveals different distributions influenced by
positive pulses of the GPS\‐PWV (derivative >
9.5\ mm/hr) for higher intensity and extension events.
These features are indicative of the occurrence of intense
precipitation and, consequently, have the potential for
application in nowcasting activities.",
doi = "10.1002/met.1735",
url = "http://dx.doi.org/10.1002/met.1735",
issn = "1350-4827",
language = "en",
targetfile = "sapucci_global.pdf",
urlaccessdate = "29 mar. 2024"
}