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Mesoscale moisture transport by the low-level jet during the IHOP field experiment

Tollerud, Edward I. and Caracena, Fernando and Koch, Steven E. and Jamison, Brian D. and Hardesty, R. Michael and McCarty, Brandi J. and Kiemle, Christoph and Collander, Randall S. and Bartels, Diana L. and Albers, Steven and Shaw, Brent and Birkenheuer, Daniel L. and Brewer, W. Alan (2008) Mesoscale moisture transport by the low-level jet during the IHOP field experiment. Monthly Weather Review, 136, pp. 3781-3795. DOI: 10.1175/2008MWR2421.1.

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Official URL: http://ams.allenpress.com/perlserv/?request=get-archive&issn=1520-0493

Abstract

Previous studies of the Low-Level Jet (LLJ) over the Central Great Plains of the U.S. have been unable to determine the role that mesoscale and smaller circulations play in the transport of moisture. To address this issue, two aircraft missions during the International H2O Project (IHOP) were designed to closely observe a well-developed LLJ over the Great Plains (primarily Oklahoma and Kansas) with multiple observation platforms. In addition to standard operational platforms (most importantly radiosondes and profilers) to provide the large-scale setting, dropsondes released from the aircraft at 55 km intervals and a pair of onboard lidar instruments (HRDL for wind and DIAL for moisture) observed the moisture transport in the LLJ at greater resolution. Using these observations, we describe the multiscalar structure of the LLJ. We then focus attention on the bulk properties and effects of scales of motion by computing moisture fluxes through cross-sections that bracket the LLJ. From these computations, we are also able to compute Reynolds averages within the cross-sections. This allows us to estimate the bulk effect of integrated estimates of the contribution of small-scale (meso- to convective-scale) circulations to the overall transport. Finally, we briefly examine the performance of the Weather Research and Forecasting (WRF) model in forecasting the intensity and evolution of the LLJ for this case.

Document Type:Article
Title:Mesoscale moisture transport by the low-level jet during the IHOP field experiment
Authors:
AuthorsInstitution or Email of Authors
Tollerud, Edward I.NOAA ESRL, Boulder, CO, USA
Caracena, FernandoNOAA ESRL, Boulder, CO, USA
Koch, Steven E.NOAA ESRL, Boulder, CO, USA
Jamison, Brian D.NOAA ESRL, Boulder, CO, USA
Hardesty, R. MichaelNOAA ESRL, Boulder, CO, USA
McCarty, Brandi J.NOAA ESRL, Boulder, CO, USA
Kiemle, ChristophUNSPECIFIED
Collander, Randall S.NOAA ESRL, Boulder, CO, USA
Bartels, Diana L.NOAA ESRL, Boulder, CO, USA
Albers, StevenNOAA ESRL, Boulder, CO, USA
Shaw, BrentWeather Decision Technologies, Norman, OK, USA
Birkenheuer, Daniel L.NOAA ESRL, Boulder, CO, USA
Brewer, W. AlanNOAA ESRL, Boulder, CO, USA
Date:1 October 2008
Journal or Publication Title:Monthly Weather Review
Volume:136
DOI:10.1175/2008MWR2421.1
Page Range:pp. 3781-3795
Status:Published
Keywords:low-level jet, wind lidar, water vapor lidar, moisture transport
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben LIDAR-Forschung und -Entwicklung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr.rer.nat. Christoph Kiemle
Deposited On:20 Nov 2008
Last Modified:12 Dec 2013 20:34

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