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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

Abstract

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
Authors:
AuthorsInstitution or Email of Authors
Fischer, Lucas LMU München
Kiemle, Christoph DLR
Craig, George C. LMU München
Date:2012
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:39
DOI:10.1029/2011GL050621
Page Range:pp. 1-5
Status:Published
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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