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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. Wiley. 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.

Item URL in elib:https://elib.dlr.de/75397/
Document Type:Article
Title:Height-resolved variability of midlatitude tropospheric water vapor measured by an airborne lidar
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Fischer, LucasLMU MünchenUNSPECIFIED
Craig, George C.LMU MünchenUNSPECIFIED
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold 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
HGF - Program:Space, Aeronautics
HGF - Program Themes:Earth Observation, ATM and Operation (old)
DLR - Research area:Raumfahrt, Aeronautics
DLR - Program:R EO - Earth Observation, L AO - Air Traffic Management and Operation
DLR - Research theme (Project):R - Projekt WALES (old), L - Climate, Weather and Environment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Freund, Jana
Deposited On:03 Apr 2012 10:37
Last Modified:31 Jul 2019 19:35

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