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Height-resolved variability of midlatitude tropospheric water vapor measured by an airborne lidar

Fischer, Lucas and Kiemle, Christoph and Craig, George C. (2012) Height-resolved variability of midlatitude tropospheric water vapor measured by an airborne lidar. Geophysical Research Letters, 39 (L06803), pp. 1-5. DOI: 10.1029/2011GL050621.

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Official URL: http://www.agu.org/journals/gl/gl1206/2011GL050621/2011GL050621.pdf


Free tropospheric water vapor variability, measured by airborne lidar over Europe during summertime, is analyzed at altitudes from 2 km to 10 km. Horizontal structure functions of specific humidity were computed and show powerlaw scaling between about 10 km to 100 km in range. The second-order structure function shows scaling exponents equivalent to spectral slopes that vary from around 5/3 in the lower troposphere to 2 at upper levels. More specifically humidity smoothness typically increases with height, while intermittency decreases. A classification of the data according to whether the series occurred above or below the level of nearby convective cloud tops gives a separation of the scaling exponents in the two air masses. The results are consistent with a water vapor distribution determined at upper levels by a downscale cascade of variance by advective mixing, but increasingly influenced at lower levels by local injection of humidity by moist convection.

Document Type:Article
Title:Height-resolved variability of midlatitude tropospheric water vapor measured by an airborne lidar
AuthorsInstitution or Email of Authors
Fischer, Lucas LMU München
Kiemle, Christoph DLR
Craig, George C. LMU München
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-5
Keywords:airborne lidar, water vapor, tropospheric variability, structure function
HGF - Research field:Aeronautics, Space and Transport, Aeronautics, Space and Transport
HGF - Program:Space, Aeronautics
HGF - Program Themes:Earth Observation, ATM and Operation
DLR - Research area:Raumfahrt, Aeronautics
DLR - Program:R EO - Erdbeobachtung, L AO - Air Traffic Management and Operation
DLR - Research theme (Project):R - Projekt WALES (old), L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Jana Freund
Deposited On:03 Apr 2012 10:37
Last Modified:13 Feb 2013 14:54

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