RT Journal Article
T1 Observed trends in the global jet stream characteristics during the second half of the 20th century
A1 Peña Ortiz, Cristina
A1 Gallego Puyol, David
A1 Ribera, Pedro
A1 Ordóñez Pérez, Paulina
A1 Álvarez Castro, María del Carmen
K1 Jet Streams
K1 STJ
K1 Climate trends
K1 Poleward shifts
AB In this paper, we propose a new method based on the detection of jet cores with the aimto describe the climatological features of the jet streams and to estimate their trends inlatitude, altitude, and velocity in the National Centers for Environmental Prediction(NCEP)/National Center for Atmospheric Research (NCAR) and 20th Century reanalysisdata sets. Due to the fact that the detection method uses a single grid point to define theposition of jet cores, our results reveal a greater latitudinal definition allowing a moreaccurate picture of the split flow configurations and double jet structures. To the best of ourknowledge, these results provide the first multiseasonal and global trend analysis of jetstreams based on a daily-resolution 3-D detection algorithm. Trends have been analyzedover 1958–2008 and during the post-satellite period, 1979–2008. We found that, ingeneral, trends in jet velocities and latitudes have been faster for the Southern Hemispherejets and especially for the southern polar front jet which has experienced the fastest velocityincrease and poleward shift over 1979–2008 during the austral summer and autumn.Results presented here show an acceleration and a poleward shift of the northern andsouthern winter subtropical jets over 1979–2008 that occur at a faster rate and over largerzonally extended regions during this latter period than during 1958–2008
PB Wiley
YR 2013
FD 2013-02-28
LK https://hdl.handle.net/10433/22846
UL https://hdl.handle.net/10433/22846
LA en
NO Journal of Geophysical Research Atmospheres, Vol. 118, Núm. 7, pp. 2702-2713
NO Departamento Sistemas Físicos, Químicos y Naturales
DS RIO
RD May 8, 2026