scholarly journals Nitric acid (HNO3) in the upper troposphere and lower stratosphere at midlatitudes: New results from aircraft-based mass spectrometric measurements

1998 ◽  
Vol 103 (D19) ◽  
pp. 25337-25343 ◽  
Author(s):  
J. Schneider ◽  
F. Arnold ◽  
V. Bürger ◽  
B. Droste-Franke ◽  
F. Grimm ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Lower Stratosphere ◽  
Mass Spectrometric ◽  
Upper Troposphere ◽  
Spectrometric Measurements

Uptake Measurements of Acetic Acid on Ice and Nitric Acid-Doped Thin Ice Films over Upper Troposphere/Lower Stratosphere Temperatures

2012 ◽  
Vol 116 (9) ◽  
pp. 2198-2208 ◽  
Author(s):  
Manolis N. Romanias ◽  
Antonia G. Zogka ◽  
Vassileios C. Papadimitriou ◽  
Panos Papagiannakopoulos
Keyword(s):  
Acetic Acid ◽  
Nitric Acid ◽  
Lower Stratosphere ◽  
Upper Troposphere ◽  
Ice Films

Investigation of an Alleged Nuclear Incident at Greenham Common Airbase Using TI-mass Spectrometric Measurements of Uranium Isotopes

2000 ◽  
Vol 34 (21) ◽  
pp. 4496-4503 ◽  
Author(s):  
Ian W. Croudace ◽  
Phillip E. Warwick ◽  
Rex N. Taylor ◽  
Andrew B. Cundy
Keyword(s):  
Mass Spectrometric ◽  
Uranium Isotopes ◽  
Spectrometric Measurements

scholarly journals A Case Study of Mass Transport during the East-West Oscillation of the Asian Summer Monsoon Anticyclone

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Jiali Luo ◽  
Jiayao Song ◽  
Hongying Tian ◽  
Lei Liu ◽  
Xinlei Liang
Keyword(s):  
Lower Stratosphere ◽  
Asian Summer Monsoon ◽  
Chemical Transport ◽  
Upward Motion ◽  
High Concentration ◽  
Upper Troposphere ◽  
Asian Summer ◽  
Mode Tm ◽  
East West

We use ERA-Interim reanalysis, MLS observations, and a trajectory model to examine the chemical transport and tracers distribution in the Upper Troposphere and Lower Stratosphere (UTLS) associated with an east-west oscillation case of the anticyclone in 2016. The results show that the spatial distribution of water vapor (H2O) was more consistent with the location of the anticyclone than carbon monoxide (CO) at 100 hPa, and an independent relative high concentration center was only found in H2O field. At 215 hPa, although the anticyclone center also migrated from the Tibetan Mode (TM) to the Iranian Mode (IM), the relative high concentration centers of both tracers were always colocated with regions where upward motion was strong in the UTLS. When the anticyclone migrated from the TM, air within the anticyclone over Tibetan Plateau may transport both westward and eastward but was always within the UTLS. The relative high concentration of tropospheric tracers within the anticyclone in the IM was from the east and transported by the westward propagation of the anticyclone rather than being lifted from surface directly. Air within the relative high geopotential height centers over Western Pacific was partly from the main anticyclone and partly from lower levels.

Atmospheric measurements of aerosol precursor gases in the upper troposphere and lower stratosphere

1997 ◽  
Vol 28 ◽  
pp. S65-S66 ◽  
Author(s):  
F. Arnold ◽  
K.H. Wohlfrom ◽  
J. Schneider ◽  
M. Klemm ◽  
T. Stilp ◽  
...  
Keyword(s):  
Lower Stratosphere ◽  
Atmospheric Measurements ◽  
Upper Troposphere

scholarly journals Aircraft measurements of gravity waves in the upper troposphere and lower stratosphere during the START08 field experiment

2015 ◽  
Vol 15 (13) ◽  
pp. 7667-7684 ◽  
Author(s):  
Fuqing Zhang ◽  
Junhong Wei ◽  
Meng Zhang ◽  
K. P. Bowman ◽  
L. L. Pan ◽  
...  
Keyword(s):  
Power Law ◽  
Gravity Waves ◽  
Lower Stratosphere ◽  
Potential Temperature ◽  
Shear Instability ◽  
Aircraft Measurements ◽  
Upper Troposphere ◽  
Airborne Measurements ◽  
Wide Range

Abstract. This study analyzes in situ airborne measurements from the 2008 Stratosphere–Troposphere Analyses of Regional Transport (START08) experiment to characterize gravity waves in the extratropical upper troposphere and lower stratosphere (ExUTLS). The focus is on the second research flight (RF02), which took place on 21–22 April 2008. This was the first airborne mission dedicated to probing gravity waves associated with strong upper-tropospheric jet–front systems. Based on spectral and wavelet analyses of the in situ observations, along with a diagnosis of the polarization relationships, clear signals of mesoscale variations with wavelengths ~ 50–500 km are found in almost every segment of the 8 h flight, which took place mostly in the lower stratosphere. The aircraft sampled a wide range of background conditions including the region near the jet core, the jet exit and over the Rocky Mountains with clear evidence of vertically propagating gravity waves of along-track wavelength between 100 and 120 km. The power spectra of the horizontal velocity components and potential temperature for the scale approximately between ~ 8 and ~ 256 km display an approximate −5/3 power law in agreement with past studies on aircraft measurements, while the fluctuations roll over to a −3 power law for the scale approximately between ~ 0.5 and ~ 8 km (except when this part of the spectrum is activated, as recorded clearly by one of the flight segments). However, at least part of the high-frequency signals with sampled periods of ~ 20–~ 60 s and wavelengths of ~ 5–~ 15 km might be due to intrinsic observational errors in the aircraft measurements, even though the possibilities that these fluctuations may be due to other physical phenomena (e.g., nonlinear dynamics, shear instability and/or turbulence) cannot be completely ruled out.

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