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| Home > Publications database > On the Use of nonmethane hydrocarbons for the Determination of Age Spectra in the Lower Stratosphere > print |
| 001 | 57411 | ||
| 005 | 20240712100945.0 | ||
| 024 | 7 | _ | |a 10.1029/2006JD007686 |2 DOI |
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| 024 | 7 | _ | |a 2128/20421 |2 Handle |
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| 041 | _ | _ | |a eng |
| 082 | _ | _ | |a 550 |
| 084 | _ | _ | |2 WoS |a Meteorology & Atmospheric Sciences |
| 100 | 1 | _ | |a Ehhalt, D. H. |b 0 |u FZJ |0 P:(DE-Juel1)3735 |
| 245 | _ | _ | |a On the Use of nonmethane hydrocarbons for the Determination of Age Spectra in the Lower Stratosphere |
| 260 | _ | _ | |c 2007 |a Washington, DC |b Union |
| 300 | _ | _ | |a D11208 |
| 336 | 7 | _ | |a Journal Article |0 PUB:(DE-HGF)16 |2 PUB:(DE-HGF) |
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| 440 | _ | 0 | |a Journal of Geophysical Research D: Atmospheres |x 0148-0227 |0 6393 |v 112 |
| 500 | _ | _ | |a Record converted from VDB: 12.11.2012 |
| 520 | _ | _ | |a On 9 April 2001, while approaching the West Coast of the North American continent, flight 20 of the NASA TRACE P campaign penetrated deeply into a stratospheric intrusion. From measurements aboard that flight we derive vertical profiles of nonmethane hydrocarbons (NMHCs) and other short-lived trace gases in the lower stratosphere using Dichlorofluoromethane, CF2Cl2, as the altitude scale. All profiles show an exponential decrease, which permits the description of their vertical distribution by a single parameter, the scale height. These scale heights are shown to be related to the respective lifetimes in a unique fashion. Using the approximation of a 1-D diffusive model with a constant eddy diffusion coefficient, K, and assuming constant lifetimes, we establish an analytical solution for this relation. By fitting this theoretical expression to the experimental data we can estimate K and thus obtain an approximate age spectrum of the form given by Hall and Plumb (1994). A much better fit to the experimental scale heights is obtained, when we allow the lifetimes to be height-dependent and calculate the theoretical scale heights numerically from a 1-D model. An optimization also suggests a constant K, but with a value of 0.46 m(2)/s, larger than those obtained from the fit of the analytical solution. The obtained age spectra should be valid for transit times not longer than 300 days. |
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| 700 | 1 | _ | |a Rohrer, F. |b 1 |u FZJ |0 P:(DE-Juel1)16347 |
| 700 | 1 | _ | |a Blake, D. R. |b 2 |0 P:(DE-HGF)0 |
| 700 | 1 | _ | |a Kinnison, D. E. |b 3 |0 P:(DE-HGF)0 |
| 700 | 1 | _ | |a Konopka, P. |b 4 |u FZJ |0 P:(DE-Juel1)129130 |
| 773 | _ | _ | |0 PERI:(DE-600)2016800-7 |a 10.1029/2006JD007686 |g Vol. 112, p. D11208 |p D11208 |q 112 |v 112 |x 0148-0227 |y 2007 |t Journal of geophysical research / Atmospheres |
| 856 | 7 | _ | |u http://dx.doi.org/10.1029/2006JD007686 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/57411/files/2006JD007686.pdf |y OpenAccess |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/57411/files/2006JD007686.pdf?subformat=pdfa |x pdfa |y OpenAccess |
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