I. Xueref
Harvard University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by I. Xueref.
Geophysical Research Letters | 2004
H. Jost; K. Drdla; Andreas Stohl; Leonhard Pfister; M. Loewenstein; J. P. Lopez; Paula K. Hudson; Daniel M. Murphy; Daniel James Cziczo; Michael Fromm; T. Paul Bui; J. Dean-Day; Christoph Gerbig; Mark Mahoney; Erik C. Richard; N. Spichtinger; J. V. Pittman; Elliot M. Weinstock; J. C. Wilson; I. Xueref
We observed a plume of air highly enriched in carbon monoxide and particles in the stratosphere at altitudes up to 15.8 km. It can be unambiguously attributed to North American forest fires. This plume demonstrates an extratropical direct transport path from the planetary boundary layer several kilometers deep into the stratosphere, which is not fully captured by large-scale atmospheric transport models. This process indicates that the stratospheric ozone layer could be sensitive to changes in forest burning associated with climatic warming.
Journal of Geophysical Research | 2004
Eric A. Ray; Karen H. Rosenlof; Erik Charles Richard; Paula Hudson; Daniel J. Cziczo; M. Loewenstein; H. Jost; J. P. Lopez; B. A. Ridley; Andrew J. Weinheimer; D. D. Montzka; D. J. Knapp; Steven C. Wofsy; Bruce C. Daube; Christoph Gerbig; I. Xueref; R. L. Herman
[1] Trace gas and particle measurements taken during the CRYSTAL-FACE mission are used to examine mixing in the summer subtropical lower stratosphere. Vigorous convection in the central and eastern United States injected a significant amount of tropospheric air into the lower stratosphere, which was subsequently advected over the region sampled during the CRYSTAL-FACE mission. Aerosols produced by biomass burning were observed over Florida during a time period with a large number of forest fires in the western United States and eastern Canada, providing evidence of convective injection of tropospheric air into the lower stratosphere. The circumstances of the large-scale flow pattern in the upper troposphere and lower stratosphere, vigorous summertime convection, abundant forest fires, and the downstream sampling allow a unique view of mixing in the lower stratosphere. We calculate the fractions of midlatitude tropospheric air in the sampled lower stratosphere and mixing rates on the basis of consistency between a number of tracer-tracer correlations. The tropospheric endpoints to the mixing estimates give an indication of midlatitude continental convective input into the lower stratosphere. We also discuss the possible impact of summertime midlatitude convection on the composition of the stratosphere as a whole.
Journal of Geophysical Research | 2007
Elliot M. Weinstock; J. V. Pittman; David Stuart Sayres; Jessica Smith; J. G. Anderson; S. C. Wofsy; I. Xueref; C. Gerbig; Bruce C. Daube; Leonhard Pfister; E. Richard; B. A. Ridley; Andrew J. Weinheimer; H. Jost; J. P. Lopez; M. Loewenstein; T. L. Thompson
Journal of Geophysical Research | 2007
J. V. Pittman; Elliot M. Weinstock; Robert J. Oglesby; David Stuart Sayres; Jessica Smith; J. G. Anderson; O. R. Cooper; Steven C. Wofsy; I. Xueref; C. Gerbig; Bruce C. Daube; Erik Charles Richard; B. A. Ridley; Andrew J. Weinheimer; M. Loewenstein; H. Jost; Jimena P. Lopez; M. J. Mahoney; T. L. Thompson; William W. Hargrove; Forrest M. Hoffman
Geophysical Research Letters | 2004
I. Xueref; Christoph Gerbig; Ann M. Fridlind; John C. Lin; Steven C. Wofsy; Bruce C. Daube; Andrew S. Ackerman; Joshua Smith; David Stuart Sayres; J. Vellovic; Darrel Baumgardner; D. Wang; Elliot M. Weinstock; Arlyn E. Andrews; E. W. Gottlieb; J. G. Anderson
Archive | 2007
J. V. Pittman; Elliot M. Weinstock; Robert J. Oglesby; David Stuart Sayres; Jessica Smith; J. G. Anderson; O. R. Cooper; Steven C. Wofsy; I. Xueref; C. Gerbig; Bruce C. Daube; Erik Charles Richard; B. A. Ridley; Andrew J. Weinheimer; M. Loewenstein; H. Jost; Jimena P. Lopez; M. J. Mahoney; T. L. Thompson; William W. Hargrove; Forrest M. Hoffman
Geophysical Research Letters | 2004
H. Jost; K. Drdla; Andreas Stohl; Leonhard Pfister; M. Loewenstein; J. P. Lopez; Paula K. Hudson; Daniel M. Murphy; Daniel James Cziczo; Michael Fromm; T. Paul Bui; J. Dean-Day; Christoph Gerbig; Mark Mahoney; Erik C. Richard; N. Spichtinger; J. V. Pittman; Elliot M. Weinstock; J. C. Wilson; I. Xueref
Archive | 2003
J. P. Lopez; H. Jost; Michael Loewenstein; James R. Podolske; I. Xueref; Steven C. Wofsy; David E. Baumgardner; Britt E. Anderson; Teresa L. Campos
Archive | 2003
Eric A. Ray; Karen H. Rosenlof; Erik Charles Richard; D. M. Murphy; Daniel James Cziczo; Paula Hudson; Steven C. Wofsy; Arlyn Elizabeth Andrews; Bruce C. Daube; Christoph Gerbig; I. Xueref; M. Lowenstein; H. Jost; J. P. Lopez; Barbara Ridley; Andrew J. Weinheimer; D. D. Montzka; R. L. Herman
Archive | 2002
Sing Lee; Jean Wilson; Jeanne M. Reeves; C. A. Brock; Haflidi H. Jonsson; M. Lowenstein; Mark Mahoney; Robert Laird Herman; J. G. Anderson; I. Xueref; Christoph Gerbig; Arlyn Elizabeth Andrews; E. Hinsta